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Four coo;rdination polymers (CPs), namely, [Ni(HDNA)(bibp)(H2O)]n (1), [Co(HDNA)(bibp)]n (2), {[Co(HDNA)(bibp)]·H2O}n (3) and {[Zn(HDNA)(bibp)]·H2O}n (4), have been synthesized from the mixed-ligand strategy of 6-(3,5-dicarboxylphenyl)nicotinic acid (H3DNA) and 4,4′-bis(benzimidazo-1-ly)benzene (bibp). Structural analyses revealed that four CPs all feature 2D sheets with diverse nets from {44.62}-sql net (1), {Co2(COO)2} SBUs based {44.62}-sql net (2), to 4-connected {65.8} sheet (3&4). Besides, the temperature-dependent magnetic susceptibilities of CPs 1-3 were investigated. And the luminescent sensing indicated CP 4 is a good bifunctional sensor for Fe3+ and Cr2O72- ions.

Three 3D Cd(Ⅱ) metal-organic frameworks(MOFs), namely, {[Cd3(L)(OH)(H2O)3]n·2H2O} (1), {Cd5(L)2(H2O)9}n (2) and {Cd2(L)(bib)(NH4)}n (3), have been synthesized based on H5L and cadmium ion under hydrothermal conditions (H5L = 3,5-di(2′,5′-dicarboxylpyl)benozoic acid, bib = 1,4-bis(1-imidazoly)benzene), and characterized by IR spectrum analysis, powder X-ray diffraction analysis (PXRD) and thermogravimetric analysis (TGA). X-ray single crystal diffraction analyses showed that complex 1 is a porous 3D 4-connected net with the point symbol of {4.65} with the trinuclear [Cd3(OH)(COO)5] SBUs, complex 2 displays a 3D framework 7-connected net with the point symbol of {33.412.55.6} with the pentanuclear [Cd5(COO)10(H2O)9] SBUs and complex 3 presents a porous 3D 4,6-connected net with the point symbol of {43.610.82}{43.63}. Furthermore, fluorescent measurements indicated that 1 and 2 have potential application in the detection for Fe3+, CrO42- and Cr2O72- ions in aqueous solution. Gas sorption properties exhibited that complex 1 has better hydrogen storage performance.

Two new metal−organic frameworks (MOFs), formulated as {[Ni3(TCPB)2(bibp)2]·4dioxane·DMF·H2O}n (1), {[Mn3(TCPB)2(bimp)(DMF)]}n (2) have been constructed from polycarboxylate ligand as well as bis(imidazole) ligands under hydrothermal method (H3TCPB=1,3,5-tris(4-carbonylphenyloxy)benzene, bibp = 4,4'-bis(imidazol-1-yl)biphenyl, bimb= 1,4-bis(imidazol-1-ylmethyl)benene). Structural analysis reveals that both 1 and 2 are two-fold interpenetrated 3D frameworks. Complex 1 is a novel 2-nodal (3,10)-{3.42}2 {34.410.514.614.72.8}-3,10T3 net, the structure of 2 is a (3,8)-connected {43}2{46.618.84}–tfz–d net. Furthermore, sorption behaviors of 1 for gases (N2, H2, CH4, and CO2) and organic dyes (MB, RhB, MO) showed that 1 has high selectivity for the adsorption of CO2 over CH4 and MB over other dye molecules (RhB and MO), respectively. In addition, the magnetic properties measurements indicated that both 1 and 2 display antiferromagnetic interactions between trinuclear {M3(COO)6} SBUs.

Amino acid functionalized D301 resins (Tyr-D301, Phe-D301, and Ala-D301) are successfully prepared to remove phenols. The influences of adsorption condition on adsorption ability and the practical ...

By employing Y-shaped N-heterocyclic carboxylic acid 4,4′-(1H-1,2,4-triazol-1-yl)methylene-bis(benzoic acid) (H2TZMB) and pyridine ancillary linkers (4,4′-bipy = 4,4′-bipyridine, 1,4-bipb = 1,4-bis(pyrid-4-yl)benzene and 4,4′-bipb = 4,4′-bis(pyrid-4-yl)biphenyl), five new coordination polymers (CPs), namely, {[Cd(TZMB)(DMA)]·(H2O)0.5}n (1), {[Cd(HTZMB)2(4,4′-bipb)]·(4,4′-bipb)(H2O)0.5}n (2), {[Ni(TZMB)(1,4-bipb)(H2O)]·H2O}n (3),{[Ni(TZMB)(4,4′-bipy)(H2O)1.5]·(H2O)3.5}n (4) and {[Mn2(TZMB)2(H2O)(DMA)]·DMA}n (5), have been obtained and characterized. Structural analyses reveal that 1 is a 2D (3,6)-connected {43}2{46·66·83} net based on binuclear {Cd2(COO)4} SBUs. The 2D structure of 2 exhibits a uninodal 4-connected net with the point symbol of {44·62}. 3 shows a 3D (3,5)-connected net with the point symbol of {4·6·8}{4·64·85}. 4 presents a 3D (4,6)-connected net based on binuclear {Ni2(COO)2(μ2-H2O)} SBUs with the point symbol of {3·4·53·6}{32·42·55·65·7}. 5 indicates a 3D 3-nodal (3,4,7)-connected net with 1D rod-like {Mn2(COO)4}n SBUs with the point symbol of {42·6}{44·62}{46·69·86}. Luminescence properties of 1 and 2 demonstrate that they have potential applications in luminescence sensing for NACs and Fe3+ ions, and then luminescence quenching mechanisms were systematically investigated. Furthermore, magnetic measurements of 3–5 indicate that there exist ferromagnetic interactions between adjacent Ni(II) ions in 3 and 4 and antiferromagnetic interaction between adjacent Mn(II) ions in 5.

Three new coordination polymers (CPs), formulated as {[Ni(HDCPN)(4,4′-bpy)(CH3CH2OH)(H2O)2]·0.5CH3CH2OH}n (1), {[Ni3(DCPN)2(4,4-bibp)4(H2O)4]·2CH3CH2OH·5H2O}n (2), and {[Cu3(DCPN)2(1,3-bimb)3]·6H2O·2DMF}n (3) (H3DCPN = 6-(3,5-dicarboxylphenyl)nicotinic acid and 1,3-bimb = 1,3-bis(imidazol-1-ylmethyl)benzene, 4,4′-bpy = 4,4′-bipyridine, 4,4′-bibp = 4,4′-bis(benzoimiazo-1-yl)biphenyl) were synthesized under hydrothermal conditions. These CPs were researched in depth by single-crystal X-ray diffraction analysis, elemental analysis (EA), IR spectroscopy, thermogravimetric analysis (TGA) and X-ray diffraction powder (PXRD) analysis. The structural analysis reveals that complex 1 exhibits a traditional 2-nodal (3,5)-{63}{69·8}-hms network, complex 2 shows a new 2D {63}{65·8}, and complex 3 exhibits a novel 3D (3,4)-c pillar-layered architecture with a point symbol of {63}2{64.8.10}3. Furthermore, magnetic studies show that complexes 1 and 2 exhibit antiferromagnetic properties. In addition, fluorescence measurements show that 3 can be applied as a probe for highly sensitive and selective detection of nitroaromatics and Fe3+ ions.

Two Cd(II) coordination polymers (CPs) were assembled from the mixed ligand strategy of π-conjugated aromatic polycarboxylates and bis(imidazole) linkers, with the structures being a 2-fold interpenetrating 3D bbf net for 1 and a 2D hxl sheet for 2. The fluorescence measurements revealed that both Cd(II) CPs were promising luminescent sensors for the detection of nitrofuran/nitroimidazole antibiotics (ABXs) with low detection limits. Besides, the luminescence quenching of the two Cd(II) CPs toward ABXs was investigated by using DFT calculations and spectral overlap experiments.

A bifunctional Tb-based metal–organic framework, namely {[Tb(TCPB)(DMF)]·dioxane·0.5H2O}n, has been assembled from the tripodal ligand 1,3,5-tris(4-carbonylphenyloxy)benzene (H3TCPB) using solvothermal methods and characterized by EA, TG, IR, PXRD, etc. Structural analysis revealed that Tb-MOF is a 3D (4,8)-c net with the point symbol {44·62}2{48·617·83} and contains two different 1D channels, rectangular (11.115 A × 13.231 A) and quadrilateral (12.228 A × 19.210 A). The luminescence properties of Tb-MOF showed that it has high sensitivity to and exhibits selective sensing for nitrofurazone (NZF) and nitrofurantoin (NFT) in aqueous solutions. Meanwhile, owing to its typical Tb yellowish-green emission, the ground Tb-MOF powder can be used for fingerprint recognition. Furthermore, because of its pores and surface area, the adsorption capacity of Tb-MOF for NFT and NZF in water medium can reach 81.3% and 84.4% within 120 min, respectively. The title compound is the first bifunctional material for the detection and removal of antibiotics in water systems at the same time.

A one-dimensional (1D) coordination polymer, [{Co2(pymca)2·(H2O)4}SO4·2H2O]n (1) (pymca = 2-carboxypyrimidine), was solvothermally synthesized via the reaction of 2-cyanopyrimidine and Co(SCN)2. A bidentate pymca ligand was formed in situ by the hydrolysis of 2-cyanopyrimidine. Furthermore, in this study, the magnetic properties of complex 1 were investigated in detail. The results indicated that complex 1 showed a single-chain magnet (SCM) behavior below ca. 3 K. The energy barrier (Δτ1/kB) and preexponential factor (τ0) of SCM were 31.2 K and 5.4 × 10−9 s, respectively.

A novel 3D luminescent coordination polymer (LCP), {[Cd3.5(μ3-OH)(TCPB)2(bimb)(H2O)3]·0.5 dioxane·0.5 H2O}n (1) (H3TCPB = 1,3,5-tris(4-carbonylphenyloxy)benzene, bimb = 1,4-bis(imidazol-1-ylmethyl)benene), has been synthesized using solvothermal methods, and characterized by single-crystal X-ray diffraction analysis, elemental analyses, IR spectroscopy, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analysis. Furthermore, luminescence experiments showed that 1 can act as a sensor towards trace NACs and antibiotics in aqueous solution with high sensitivity and selectivity. Moreover, the luminescence quenching mechanisms of 1 are mainly attributed to photo-induced electron transfer (PET) and resonance energy transfer (RET) between host and guest molecules.

On the basis of the bifunctional 1,4-bis(imidazol-1-yl)terephthalic acid (H2BTA), four three-dimensional (3D) Pb(II)/Zn(II) coordination polymers (CPs), {[Zn(BTA)]·1.5(DOA)}n (1), [Zn(BTA)]n (2), [Pb(BTA)]n (3), and [Pb(BTA)]n (4), have been synthesized (DOA = dioxane). Structural analyses reveal that two Zn(II)-based complexes are 3D (4,4)-c pts pseudo-supramolecular isomers for 1 and 2, and two Pb(II)-based complexes are supramolecular isomers with a 3D (4,5,6)-c net for 3 and a 3D 6-c pcu net for 4, respectively. Furthermore, the gas adsorption behaviors of complexes 1 and 2 for N2, CO2, and CH4 have been studied in detail at varying temperatures, and the results showed that the adsorption capacities to CO2 at 273 K and 1 bar are stronger than those of other gases. Meanwhile, the selectivity of 1 and 2 for CO2/CH4 was evaluated by the usage of the ideal adsorbed solution theory, whose selectivity exceeded those of reported MOFs under similar conditions. In addition, the fluorescent measurements showed ...

Three 3D Cd(II) complexes, namely, {[Cd4(L)2(dioxane)3(H2O)3]·DMA·5H2O}n (1), {[Cd2(L)(phen)(H2O)3.5]·4H2O}n (2) and {[Cd2(L)(phen)(H2O)4]·3H2O·DMA}n (3) have been synthesized from the ligand of 3,5-di(2′,5-dicarboxylphenyl)pyridine (H4L) with or without the assistance of phen auxiliary linker (phen = 1,10-phenanthroline). Complex 1 displays a 3D (4,4,9)-connected net with the point symbol of {3.45}{32.414.55.611.72.82}{45.6}. Complex 2 shows a 3D (4,8)-connected net with the point symbol of {43. 63}2{46.619.83}. Complex 3 presents a 3D 4-connected net with the point symbol of {43.62.8}. The fluorescence measurements showed 1–3 exhibit sensitive detection of Fe(III) and Cr(VI) ions with a low detection limit. In addition, the gas sorption isotherms of complex 3 for N2, H2, CO2 and CH4 were investigated, and the corresponding uptakes are 239.8 cm3 g−1 for N2 and 93.9 cm3 g−1 for H2 at 77 K, 50.5 cm3 g−1 for CO2 and 17.0 cm3 g−1 for CH4 at 298 K, 54.8 cm3 g−1 for CO2 and 24.2 cm3 g−1 for CH4 at 273 K, respectively. Based on the N2 isotherm, the Brunauer−Emmett−Teller (BET) and Langmuir surface area of 3 were calculated to be 610.1 and 710.5 m2 g−1, respectively. Moreover, the two binary gas mixtures adsorption was also studied, indicating that the adsorption of 3 for CO2 is better than that of CH4, which was verified by ideal adsorbed solution theory (IAST) with the adsorption selectivity being 8.5 (landfill gas, CO2/CH4 = 0.5/0.5) and 7.2 (natural gas, CO2/CH4 = 0.05/0.95).

The tautomer distributions of d ‑fructose, a popular model compound for biorefinery, in various lower alcohols and DMSO‑d6 (ROHs/DMSO‑d6) mixtures at 298 K were investigated by quantitative 13C NMR. The tautomer distributions of d ‑fructose in ethanol/DMSO‑d6 and methanol/DMSO‑d6 with different volume ratios of alcohols to DMSO‑d6 were also examined. For these normal alcohols (methanol, ethanol, n‑propanol and n‑butanol)/DMSO‑d6, the tautomer distribution of d ‑fructose in methanol/DMSO‑d6 exhibited the shortest equilibration time (46 h) and the lowest concentration of β‑furanose (39.0%) at equilibrium. The fraction of fructofuranose (α‑furanose and β‑furanose) at equilibrium and time needed to reach equilibrium in branched chain alcohols/DMSO‑d6 obey the following order: 2‑propanol/DMSO‑d6 (62.2%, 320 h) > tert‑butanol/DMSO‑d6 (61.6%, 307 h) > 2‑butanol/DMSO‑d6 (60.6%, 216 h) > isobutanol/DMSO‑d6 (57.8%, 134 h). For the diols/DMSO‑d6, the time for the tautomer distribution of d ‑fructose to reach the equilibrium was found to be: 1,4‑butanediol/DMSO‑d6 (113 h) > 1,2‑propanediol/DMSO‑d6 (38 h) > ethylene glycol/DMSO‑d6 (36 h). For ethanol/DMSO‑d6 and methanol/DMSO‑d6 with respectively different volume ratios, the experimental results showed that the high concentration of ethanol or methanol increases the conversion rate of tautomers.

The target for the self-assembly of functional microporous metal-organic frameworks (MOFs) could be realized by employing ligand-directed and/or template-induced strategies, which prompted us to explore the synthetic technique of d

In terms of recently documented references, the introduction of V═O units into porous MOF/COF frameworks can greatly improve their original performance and expand their application prospects due to a change in their electronegativity. In this work, by a cation-exchange strategy, a consummate combination of separate 4f [Tm

The exquisite combination of Ba

Pressure is an efficient tool to tune the electronic structure of iron-based superconductors. Here, we performed systematic high pressure transport and magnetization measurements on (${\mathrm{Ca}}_{0.73}{\mathrm{La}}_{0.27}){\mathrm{FeAs}}_{2}$ single crystal samples. Filamentary superconductivity is induced under a small applied pressure $P=1.6$ GPa. At $P=3.2$ GPa, the superconductivity becomes bulk. It is found that ${T}_{c}$ increases initially and then decreases with further increasing pressure, forming a dome shape. Hall resistivity is measured simultaneously and the Hall coefficient ${R}_{H}$ at 50 K shows nonmonotonic dependence on pressure. In addition, ${R}_{H}$ reverse sign at a critical pressure ${P}_{c}=3.9$ GPa, where ${T}_{c}$ reaches the maximum and there is a sudden increase in superconducting diamagnetism. Theoretical calculation results show a pressure induced Lifshitz transition of the Fermi surface which might be responsible for the appearance of superconductivity.

In terms of documented references, multifunctional MOFs with high catalytic performance could be constructed from the combination of metal cations and polycarboxyl-pyridine ligands, which could efficiently endow crystallized porous frameworks with the coexisting Lewis acid-base properties. Thus, by employing a ligand-directed synthetic strategy, the exquisite combination of wave-like inorganic chains of [Tm(CO

High-performance electrocatalysts for the methanol oxidation reaction (MOR) are the key to advance the application of direct methanol fuel cells. Pt-Based electrocatalysts for the MOR are limited due to their high cost, low stability and poor resistance to carbon monoxide (CO) poisoning. The development of non-noble metal-based electrocatalysts for the MOR with high activity and good stability is desired, but it remains a challenge. Herein, we report a simple strategy to prepare nickel nanocrystals embedded in a nitrogen-doped carbon matrix (Ni/N-C composite) by pyrolysis of Ni-coordinated polyaniline-poly(vinyl alcohol) hydrogels. These in situ generated Ni nanocrystals serve as active electrocatalysts for the MOR, while the nitrogen-doped carbon matrix serves as a conductive support to facilitate electron transfer and also to protect the active Ni nanocrystals. The optimal Ni/N-C@500 electrocatalyst shows a high MOR activity of 147 mA cm-2 at 1.66 V vs. the RHE in alkaline methanol solution, which is outstanding among Ni-based MOR electrocatalysts. Ni/N-C@500 also shows better stability than the Pt/C catalyst in the long-term MOR test at high current densities. Upon CO poisoning, Ni/N-C@500 retains 85% of its MOR activity, far exceeding the performance of the Pt/C catalyst (61% retention). Owing to its facile synthesis, outstanding activity and high stability, the Ni/N-C@500 composite is promising as a low-cost, efficient and CO-resistant electrocatalyst for the MOR.

A lanthanide coordination polymer [Eu(BCPB)(H2O)2]n (1) was synthesized based on a semirigid tripodal polycarboxylic acid ligand (H3BCPB = 3,5-bis(2-carboxy-phenoxy)-benzoic acid). Single crystal X-ray diffraction analyses showed that compound 1 exhibits 2D layer structures with [Eu6(COO)22(H2O)12] SBU. Furthermore, fluorescence tests demonstrated that 1 has highly sensitive detection for Fe3+/Cr2O72− ions in aqueous solution by a fluorescence quenching effect. Meanwhile, the quenching mechanisms of 1 for Fe3+ and Cr2O72− were also investigated in detail.

As a special biomarker for many nervous system diseases, Glutamate (Glu) plays an important role in clinical application. Therefore, it is of great significance to sense Glu sensitively in aqueous medium or serum. Here, a novel three-fold interpenetration 3D framework of {[Cd (HTCPB) (4,4′-bbib)]·2H2O}n (1) (H3TCPB ​= ​1,3,5-tris(4-carbonylphenyloxy)benzene, 4,4′-bbib ​= ​4,4′-bis(benzoimidazo-1-yl)biphenyl) (1) has been successfully synthesized and characterized by single-crystal X-Ray diffraction (SCXRD), X-ray powder diffraction analyses (PXRD), thermogravimetric (TG) and X-ray photoelectron spectroscopy (XPS). Stability experiments show that 1 has excellent water and thermal stability. And luminescence experiments demonstrated that 1 can selectively and sensitively sense Glu in aqueous solution with the limit of detection (LOD) being 1.15 ​× ​10-7 ​M. Meanwhile, the detection concentration of 1 towards Glu in serum is 4.31 ​× ​10-5 ​M, which is far lower than that of Glu (4 ​× ​10-4 ​M) in the blood of patients with glioma. In addition, the interaction between carboxylate groups (-COOH) of H3TCPB ligands in 1 and amino-groups (−NH2) of Glu is mainly responsible for the turn-on phenomenon of 1. These results provide a platform of 1 for sensing Glu in clinical application.

The design and construction of a sensor that can sensitively and conveniently recognize metal ions are essential for the treatment of industrial wastewater. In this work, {[Cd4(HL)2(pyp)2(H2O)2]·2H2O·1.5Diox}n (1) was synthesized under solvothermal condition and presented a 2D 3,5-connected layered network with the point symbol of {3.4.5} {32.4.5.62.74}, which was coated on the surface of polyvinylidene fluoride (PVDF) to construct a novel paper sensor (1@PVDF). Meanwhile, the stability of 1@PVDF was characterized by powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA). In addition, fluorescence sensing experiments of 1@PVDF sensor for cations in aqueous system indicated that it has high sensitivity for sensing Fe3+ ions with the detection limit (DL) of 4.0 × 10-8 M. By the characterization of PXRD, UV-vis spectra, ICP, XPS, time-resolved excited-state decay measurements, the sensing mechanisms of 1@PVDF for Fe3+ ions were attributed to the competitive absorption and interaction between 1 and Fe3+. And the sensing process of 1@PVDF for Fe3+ ions was static in the Fe3+ concentration of 0 to 0.05 mM. In addition, the binding energies of Fe3+ and Zn2+ with the framework of 1 were calculated by density functional theory (DFT), which further proved that there was an obvious interaction between Fe3+ and the uncoordinated O atom in 1. Based on the thin film technology, a portable and convenient paper-based probe has been developed for practical applications.

A porous petal-like 3D 2-nodal (3,8)-c tfz-d metal-organic framework (MOF 1) of {[Co1.5(TCPB)(1.3-bimb)0.5·(DMF)·(dioxane)1.5]}n has been solvothermally synthesized and calcined at 700 ℃ under N2 atmosphere to obtain Co/C composite (NC1). Meanwhile, 2D flake Ni(OH)2 was in-situ coated on the surface of NC1 to prepare Ni(OH)2@NC1 composite (NC2). The structural characterization results indicated that NC1 has larger surface area and porosity compared with MOF1, and flake Ni (OH) 2 scales are anchored on the surface of NC1, which are favorable for the penetration of the electrolyte. The electrochemical measurements showed that the specific capacitance (866.8 F g−1) of the NC2-based electrode is more than three times as much as that of NC1-based electrode (264.5 F g−1), and its capacitance retention rate is 97.3% after 1000 cycles, which are mainly attributed to the fact that the pores in NC2 facilitate the diffusion of electrolyte ions, the higher surface area provides more active sites and the synergistic effect of bimetals. Also, an asymmetric supercapacitor (ASC) was fabricated with active carbon as negative electrode, NC2@NF as positive electrode and KOH aqueous solutions (1 M) as electrolyte. The energy density (E) and power density (P) of ASC were 39.7 Wh kg−1 and 213.1 W kg−1 respectively, which is comparable to that of some previously reported ASCs. Profiting from its excellent electroactivity and cyclic stability, NC2-based electrode is expected to have good application prospects in batteries, supercapacitors and other energy storage technologies.

Metal sulfides have been considered to be excellent electrode materials for supercapacitors (SCs) due to their high conductivity and electrochemical activity. Meanwhile, the addition of redox additives to the electrolyte can increase the pseudocapacitance of SCs. Herein, the composite (Cu-CuxS@S-C) of Cu nanocrystals and CuxS embedded in S-doped carbon matrix was prepared through impregnation method followed by high-temperature pyrolysis. The optimal Cu-CuxS@S-C-600 has an extremely high capacitance of 9607 mF cm−2 at 5 mA cm−2 in the alkaline electrolyte with thiourea (TU), which is due to the good conductivity of Cu and CuxS, large crystal plane spacing of CuxS, and the redox reaction caused by the addition of TU. The symmetrical SC based on Cu-CuxS@S-C-600 electrode was fabricated, its pseudocapacitance (960 mF cm−2) in the electrolyte with TU is 4.6 times that (208 mF cm−2) in the electrolyte without TU. The energy density (E) of SC reaches 261 µ Wh cm−2, and the power density (P) is 2800 µW cm−2 at 4 mA cm−2 in the gel electrolyte with TU.

Fe3+ Herein, a bifunctional 3D porous metal-organic framework (Zn-MOF) was synthesized based on the solvothermal reaction of tri(p-carboxyphenyl)phosphane oxide (H3L) and Zn salts, and characterized by powder X-ray diffraction (PXRD), thermogravimetric (TG), Infrared (IR), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET). The results show that Zn-MOF has high stability and its specific surface area and pore size are 102.36 m2 g−1 and 2.94 nm, respectively. Meanwhile, Zn-MOF exhibited excellent adsorption performance for Congo red (CR) and Methyl orange (MO) dyes. The adsorption of CR dyes by Zn-MOF is mainly due to the sedimentation caused by gravity of large molecules formed by hydrogen bonding between –NH2 in CR dye molecules and μ3-OH- in Zn-MOF, while the adsorption of MO by Zn-MOF is mainly attributed to that the larger pore size of Zn-MOF is conducive to MO dye molecules into the channels of Zn-MOF. At the same time, a series of fluorescence experiments showed that Zn-MOF can also sensitively recognize Fe3+ ion in aqueous medium with the limit of detection of 0.09716 μM, which is inferior to the previously reported values. Furthermore, the recognition mechanism of Zn-MOF for Fe3+ ion is mainly ascribed to the internal filtering effect (IFE) by the characterization of PXRD, UV–vis and fluorescence lifetime.

The development of effective and low-cost anode catalysts is a big challenge in the application of direct hydrazine fuel cell (DHFC). Herein, we report the in-situ grown Co9S8 nanocrystals into S-doped carbon matrix (Co9S8@S-C) as an efficient electrocatalyst for hydrazine oxidation reaction (HzOR). Co9S8 nanocrystals serve as the active site for electrocatalytic HzOR, and the conductive and porous S-doped carbon matrix not only promotes the charge and mass transfer, but also immobilizes and protects the Co9S8 nanocrystals from damage during HzOR. The optimal Co9S8@S-C-600 catalyst possesses a high Brunauer-Emmett-Teller (BET) specific surface area of 60.8 m2 g−1, and shows a current density (j) of 376 mA∙cm−2 for HzOR in alkaline medium at 0.3 V vs RHE, whose activity exceeds that of some previously reported electrocatalysts for HzOR. Furthermore, the activity retention rate of Co9S8@S-C-600 is 92.8% after 12-h HzOR test at a j value of greater than 300 mA∙cm−2, which is much better than that of Pt/C catalyst (15% activity retention). The excellent activity and durability of the Co9S8@S-C-600 catalyst are mainly attributed to the combined effect of highly active Co9S8 nanocrystals and the conductive and porous S-doped carbon matrixes, which makes Co9S8@S-C-600 as an effective non-noble metal electrocatalysts for HzOR.

Based on the hydrolysates of N,N′-bis(3,5-dicarboxylatophenyl)pyromelliticdi-imide) (H4L) and 1,3-bis(imidazol-1-ylmethyl)benzene (bimb), three coordination polymers, namely, {[Zn(BTC)0.5(bimb)]·4H2O}n (1), [Cu(BTC)0.5(bimb)]n (2), and {[Cd(AIP)(H2O)]·H2O}n (3), have been obtained under solvothermal conditions. The possible hydrolysis mechanism of H4L was investigated here. Structural analyses reveal that complex 1 is a 3D (4,4)-c {64.82}{66}2-bbf net. Complex 2 displays a 2D 4-c {32.62.72}-kgm sheet. While complex 3 exhibits a 3D (3,6)-c {4.62}2{42.610.83}-rtl net based on binuclear {Cd2(COO)4} SBUs. Besides, luminescent sensing investigation indicated that 1 and 3 exhibit highly sensitive and selective sensing of chromate anions in aqueous solution.

Two lanthanide metal-organic frameworks (LOFs), namely, {[Tb(L3−) (H2O)]·3CH3CN}n (1) and {(Me2NH2+)0.5·[Gd(L3−)(HCOO−)0.5 H2O]·DMF·4EtOH·H2O}n (2) have been constructed by tris(4-carboxyphenyl)phosphane oxide (H3L) under solvothermal conditions. Structural analyses indicate that complex 1 appears a 3D 6-connected {412∙63} net based on the binuclear {Tb2(COO)2} clusters. Complex 2 is also a 3D framework. Furthermore, the photoluminescence of 1 in the solid state and different solvent emulsions were studied, the results indicate that 1 shows characteristic green emission of Tb3+ ion and has better fluorescent recognition for sorts of organic solvent molecules and Fe3+ ion. Finally, the result of the variable-temperature magnetic susceptibilities suggests that complex 2 have antiferromagnetic behavior between Gd(III) ions.

Fischer–Tropsch wastewater (FTW), co-produced with hydrocarbons in Fischer–Tropsch process, is usually rich in water-soluble oxygenates, e.g. carboxylic acids, alcohols and aldehydes. Purification of FTW is crucial for achieving effective resource utilization and environmental concerns. The adsorption of FTW by humic acid (HA) has been studied via NMR. Butanol isomers, n-butanol (n-BuOH), sec-butanol (s-BuOH), iso-butanol (i-BuOH) and tert-butanol (t-BuOH), were used as model compounds of water soluble organic constituent for FTW. The interaction between HA and BuOHs was evaluated based on the NMR study. Lack of chemical shift change and broadening of peak width were observed with successive HA addition, 1H spin-lattice and spin-spin relaxation time of BuOHs decrease and 1H correction time increased. Association percentage to HA, association constants and Gibbs free energies for BuOHs were calculated. The adsorption efficiency of BuOHs decreased in the order: s-BuOH > n-BuOH > i-BuOH > t-BuOH. The effects of HA concentration and solution pH value on the interaction were examined, and the interaction is favored by increasing HA concentration, but less dependent on solution pH value. The studied process is effective for treating FTW and has a great potential for industrial applications due to its simplicity and low price.

Based on the mixed ligands of aromatic pentacarboxylate of 3,5-di(2′,4′-dicarboxylphenyl)benozoic acid (H5L) and 1,4-bis(imidazol-1-yl) benzene (bib), two novel coordination polymers, namely, [Ni1.5(H2L)(bib)1.5(H2O)2]n (1), and {[Pb2(HL)(bib)1.5(H2O)]·H2O}n (2) have been synthesized and characterized by EA, IR, TG, PXRD. Structure analyses reveal that complexes 1 and 2 are both (3,4,4)-connected structures with the same stoichiometry of (3-c)2(4-c)2(4-c), the 2D {63}2{64.8.10}{64.82}2 trilayer for 1, and 3D {6.82}2{64.82}2{8.104.12} network for 2. Complexes 1 and 2 exhibit excellent recyclable, selective, and sensitive detection of Cr(VI) anions in aqueous solution. The possible mechanism for selective luminescence quenching responses toward Cr(VI) anions is also discussed in detail.

Three novel coordination polymers (CPs), formulated as [Co2(TZI)(OH)(H2O)2]n (1), {[Co(H2TZI)2(BIB)(H2O)2]·(H2O)2}n (2), and [Ni(HTZI)(BPB)(H2O)]n (3) (H3TZI = 5-(1H-tetrazol-5-yl)isophthalic acid, BIB = 1,4-bi(1-imidazolyl)benzene, and BPB = 1,4-bi(1- pyridyl)benzene), have been synthesized under hydrothermal methods, using 5-(1H-tetrazol-5-yl)isophthalic acid ligand (H3TZI) and two different N-donating ancillary ligands. Their structures have been determined by single-crystal X-ray diffraction analysis, elemental analysis (EA), IR spectra (IR), powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). X-ray single-crystal diffraction analyses reveal that complex 1 possesses a 2D bilayer structure, complex 2 displays a 3D supermolecular structure with a Co(H2TZI)2 SBU by H-bond interactions between neighbouring 1D chains, and complex 3 presents a 2D framework with a dinuclear [Ni2N4]2+ SBU. Furthermore, the magnetic properties of 1–3 have been investigated, the results show there are antiferromagnetic interactions between the Co ions in 1 and 2, and the ferromagnetic interactions between Ni ions in 3.

Two novel coordination polymers, {[Cd(TZMB)(1,4-bib)0.5]·(H2O)1.5} (1) and {[Zn(TZMB)(1,4-bib)0.5]}n (2), have been synthesized under solvothermal conditions. Complex 1 displays a 3D structure with the (47.84)(4.72.83) topology and Complex 2 is a 3D structure with the point symbol of {4.82}{4.85}. And complex 1 shows good luminescent quenching effect for organic solvent molecules (actone and p-nitrophenol) and Fe3+.

Two 3D modular designed coordination polymers, namely, {[H2N(CH3)2]2[Mn(TPT)]}n (1), and {[Cd(TPT)0.5(bib)]·0.5H2O}n (2) (H4TPT = p-terphenyl-2,2″,5″,5‴-tetracarboxylate acid, and bib = 1,3-bis((imidazol-1-yl) benzene) have been synthesized and structural characterized by EA, IR, TG, PXRD. Single-crystal X-ray diffraction analyses reveal that complex 1 is a 3D 4-connected {42.63.8}–sra net with the tiling modular being [42.62.82] = [4a.4b.62.8a.8b] (transitivity is 2451). While complex 2 is a 3D (4,4)-connected {64.82}{66}2–bbf net with tiling modular is [6.82]+[63.8] = [6 c.8a.8b]+[6a.6b.6 c.8a] (transitivity is 2352). The variable-temperature susceptibility of 1 has been investigated. Besides, complex 2 exhibits highly sensitive sensing of FeIII ions in DMF solution.

Based on the mixed ligands synthesis strategy, a 3D cobalt (II) coordination polymer, [Co(tptc)0.5(bib)]n (1), has been assembled from p-terphenyl-2,2″,5″,5″'-tetracarboxylate acid (H4tptc) and 1,3-bis((imidazol-1-yl) benzene (bib). Structural analysis revealed that complex 1 is a 3D framework, which can be simplified into a (4,4)-connected {64.82}{66}2 bbf net. And the modular analysis reveals the tiling of 1 is [6.82] + [63.8] = [6c.8a.8b] + [6a.6b.6c.8a] with the transitivity is 2352. And the luminescent sensing investigation indicating complex 1 exhibits highly sensitive sensing of CrO42−/Cr2O72− anions in aqueous solution through strong luminescence quenching effects.

Three coordination polymers (CPs), {[Zn(HL)]·2CH3CN}n (1) {[Co(HL)(bimb)]·4H2O}n (2) and {[Cd(HL)(bimb)]·3EtOH·3H2O·DMF}n (3) (H3L = tris(p-carboxyphenyl)phosphane oxide, bimb = 1,4-bis(imidazol-1-ylmethyl)benzene) have been synthesized under solvothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analysis. Structural analyses reveal that complex 1 appears a 3D 3,5-connected {4.62}2{42.69.84} net. While 2 and 3 are 1D polymeric chains that were further packed into 3D supramolecular architectures through hydrogen bond interactions. Furthermore, fluorescence measurements indicate that the complex 1 can sensitively sense acetone, nitrobenzene derivatives and Fe3+ ion, which implies that the 1 is expected to be luminescence sensor materials for sensing small molecules and metal ions.

Rare earth elements are an important strategic resource. However, a trace of Fe(III) impurity has serious adverse impact on the performance of rare earth materials. We synthesized a novel nitrogen-containing carbon material, ACLR-400, using lotus root as raw materials. The ACLR-400 was characterized by surface area analyzer, elemental analysis and FT-IR. The selectivity and removal efficiency of ACLR-400 towards Fe(III) were also investigated. The BET specific surface area of ACLR-400 was 68.44 m2·g−1, and the average pore diameter was 12.54 nm. With abundant nitrogen- containing functional groups and well-developed internal pore structure, ACLR-400 possesses strong adsorption affinity, excellent selectivity and removal efficiency for Fe(III). The adsorption capacity of ACLR-400 towards Fe(III) could reach to 0.46 mmol·g−1, selectivity coefficient with respect to La(III) was 8.9, and removal efficiency was 99.61%. The adsorption isotherm data greatly obey the Freundlich isotherm. In addition, ACLR-400 can be regenerated easily and possesses better regeneration ability and reusability.

Four coordination complexes, namely, [Cu(HBCB)]n (1), {[Cu(HBCB)(o-bimb)]·H2O} (2), {[Cu1.5(BCB)(m-bimb)1.5]·DMF}n (3), and [Co1.5(BCB)(bpy)1.5(H2O)]n (4), have been assembled from the semirigid tripodal 3,5-bis(2-carboxylphenoxy)benzoic acid (H3BCB) in the presence or absence of the N-donors (o-bimb = 1,2-bis(imidazol-1-ylmethyl)benzene, m-bimb = 1,3-bis(imidazol-1-ylmethyl)benzene, bpy = 4,4′-bipyridine). Structural analyses revealed that complex 1 features a {Cu2(COO)4} SBUs based 3D (3,6)-connected {4·62}2{42·610·83}-rtl net. Complex 2 displays an interesting coordination molecule cage structure. Complex 3 exhibits a 2D (3,4,4)-connected {4·62}2{4·64·8}2{64·82} sheet. And complex 4 shows a 3D (3,4,6)-connected {5·62}2{56·64·7·82·92}{64·8·9} net based on the binuclear {Co2(COO)2} SBUs and Co2 ions. The temperature-dependent magnetic susceptibilities indicated there are gradual spin transition behavior in 1, and antiferromagnetic interactions in 4.

Two new coordination polymers, namely [Zn(TZMB)]n (1) and {[Zn(TZMB)](H2TZMB)]·(C2H5OH)0.5(H2O)2.5}n (2), (H2TZMB = 4,4′-(1H-1,2,4-triazol-1-yl)methylene-bis(benzonic acid), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis, elemental analysis (EA), IR spectrum analysis (IR), powder X-ray diffraction (PXRD), and thermogravimetric (TG) analysis. Single X-ray diffraction analysis reveals that complex 1 is a 3D 3,6-connected net with the point symbol of (6110.84)(63)2 and complex 2 is a 2D 3-connected net with the point symbol of (63). Furthermore, luminescent properties of complexes 1 and 2 were also investigated in detail.

Based on 5,5 ′ -(1,3,6,8-tetraoxobenzo[ lmn ][3,8] phenanthrolin-2-7-diyl)bis-1,3- benzenedicarboxylic acid (H 4 BIPA-TC), two novel 2D coordination polymers, formulated as {[Cd(BIPA-TC) 0.5 (1,4-bib)(H 2 O)]·(H 2 O) 3.5 } n ( 1 ) and {[Cd 2 (BIPA-TC)(4,4 ′ -bibp)(H 2 O)]·(H 2 O)} n ( 2 ) have been solvothermally synthesized with the help of two bis(imidazole) linkers, 1,4-bib and 4,4 ′ -bibp(1,4-bib = 1,4-bis(benzimidazo-1-ly)benzene and 4,4 ′ -bibp = 4,4′-bis(imidazolyl)biphenyl). Single-crystal X-ray diffraction analysis shows that complex 1 is a (4,4)-connected bilayer network structure with the point symbol of (4 6 ·4 8 ) 2 (4 2 ·6 4 ), which further expand into an interestingly 2D + 2D → 3D interweaved framework. Complex 2 possesses a (4,6)-connected network with two kinds of {Cd 2 (COO) 2 } SBUs with the point symbol of (3 2 ·4 2 ·5 2 )(3 4 ·4 4 ·5 4 ·6 3 ), which further pack into a 3D supramolecular architecture through hydrogen bonds. Furthermore, the luminescent recognition properties of 1 and 2 for small organic molecules, nitroaromatic compounds, and metal cations have been explored systematically.

Four 3D novel coordination polymers (CPs), formulated as {[Co3(TCPB)2(bibp)2(dioxane)2.5(H2O)2]·(DMF)}n (1), {[Cd6(TCPB)4(bibp)4(dioxane)(H2O)2]·(dioxane)3·DMF·(H2O)0.5}n (2), {[Co1.5(TCPB)(bimb)0.5(DMF)(dioxane)]}n (3), and {[Zn1.5(TCPB)2(bimb)(DMF)(dioxane)2]·dioxane}n (4) (H3TCPB = 1,3,5-tris(4-carbonylphenyloxy)benzene, bibp = 4,4′-bis(imidazol-1-yl)biphenyl, and bimb = 1,4-bis(imidazol-1-ylmethyl)benzene), have been synthesized under solvothermal conditions and characterized by elemental analyses (EA), single-crystal X-ray diffraction analyses, X-ray powder diffraction analyses (PXRD), IR spectra, and thermogravimetric analyses (TGA). The structural analyses reveal that complex 1 can be simplified as a new 2-nodal (3,10)-{3·42}2 {34·410·514·614·72·8}-3,10T3 net, complex 2 has a 3D 2-nodal (3,8)-c network with the point symbols of {42·5}2{44·59·68·73·83·9}, complex 3 exhibits a novel 3D framework with the point symbol of {410·632·7·82}{43}2, and the structure of 4 is a (3,8)-connected {43}2{46·618·84}-tfz-d net. Furthermore, gas sorption behaviors of complex 1 for N2, H2, CH4, and CO2 have been comprehensively studied at varying temperatures: the results reveal that the adsorption capacity of 1 to N2 is stronger than those of other gases. Meanwhile, IAST calculations reveal that 1 exhibits excellent selective separation for CO2/CH4. Magnetic measurements indicate that both 1 and 3 have antiferromagnetic interactions within the trinuclear clusters. In addition, the fluorescent measurements showed that 2 and 4 exhibit highly selective and sensitive detection of Fe3+ and Cr3+ ions.

Two lanthanide metal–organic frameworks (LOFs), namely, {[Eu(L3−)(H2O)]·5H2O}n (1) and {[Dy(L3−) (H2O)]·2CH3CN}n (2), have been synthesized based on tris(4-carboxyphenyl)phosphane oxide (H3L) and further characterized by powder X-ray diffraction (PXRD), IR spectroscopy, elemental analyses and thermogravimetric (TG) analyses. X-ray diffraction analyses showed that complexes 1 and 2 are isostructural, and thus the structure and gas adsorption properties of complex 1 and the magnetic properties of 2 were described as a representative in detail. Complex 1 appears to have a 3D 6-connected {412·63} net based on binuclear {Eu2(COO)2} SBUs. Furthermore, the adsorption properties of 1 have been investigated using N2, H2, CO2 and CH4 gases. 1 has high CO2 uptake and exhibits highly selective adsorption of CO2 over CH4 at room temperature, which allows 1 to have a potential application in gas separation and purification. Finally, its full magnetic properties revealed that complex 2 displays antiferromagnetic coupling between DyIII ions and single-molecule magnet (SMM) behavior. According to the Arrhenius law, the anisotropy barrier (Ueff) and pre-exponential factor (τ0) were extracted by fitting of the alternating current data, giving the values of 53.5 K and 3.1 × 10−7 s, respectively. The afforded α parameter is less than 0.10, suggesting a single relaxation process.

The performance of direct methanol fuel cells (DMFC) mainly depends on the activity and stability of the noble-metal-based anode catalysts for methanol oxidation reaction (MOR), whose broad application is limited by the scarcity of noble metals and their susceptibility to carbon monoxide poisoning. Many efforts have been devoted to the developing of non-noble metal based MOR catalysts. Previous studies have shown that the catalytic properties of noble-metal catalysts can be modified by alloying in nanomaterials. However, non-noble metal-based nanocrystals are rarely studied as electrocatalysts, because of their high susceptibility to air oxidation. Herein, we report a simple strategy to prepare non-noble metal nanocrystals (Cu-Co nanocrystals), which are stabilized in a nitrogen-doped carbon (N-C) matrix to form Cu-Co@N-C composite. Since Co has a high activity for oxidation reactions, and Cu has a high adsorption capacity for methanol, the Cu-Co nanocrystals should present good MOR activity because of the synergistic effect of Cu and Co. The highly active Cu-Co nanocrystals are embedded in a porous N-C matrix with a large specific surface area (127.3 m2/g), which not only protects the Cu-Co nanocrystals, but also facilitate the mass and charge transfer. Indeed, the optimal Cu-Co@N-C catalyst shows a MOR activity of 171.3 mA/cm2 at 0.6 V vs SCE in alkaline medium, which is higher than most of previously reported Cu and Co-based MOR catalysts. The stability and CO-resistance of the optimal Cu-Co@N-C catalyst are also better than that of Pt/C catalyst, enabling Cu-Co@N-C a promising MOR catalyst for broad application of DMFC.

Two novel coordination polymers, formulated as {[Zn(HTPO)(bib)]·4H 2 O} n ( 1 ), {[Cu 3 (TPO) 2 (bib) 3 ]·2DMF·0.5EtOH·0.5H 2 O} n ( 2 ) (H 3 TPO = tris(4-carboxylphenyl)phosphine oxide; bib = 1,4-bis(1H-imidazol-4-yl) benzene), have been synthesized under solvothermal method and characterized by single-crystal X-ray diffraction, elemental analysis (EA), IR spectra, thermogravimetric (TG) analysis, powder X-ray diffraction (PXRD). Structural analysis reveals that complex 1 is a 2D 4-connected sheet with an intriguing 2D + 2D→2D network. Complex 2 displays a 3D 3,4-connected net with the point symbol of {10 3 } 2 {10 6 } 3 . Furthermore, the photoluminescence properties of 1 and 2 were investigated in the solid state and various solvent emulsions, the results show that 1 and 2 have better fluorescent recognition for organic molecules, Fe 3+ and Hg 2+ ions.

A novel nanoflower microsphere Zn-MOF has been solvothermally synthesized. By virtue of the large porosity and specific surface area of Zn-MOF, Ce salts have been successfully incorporated into the cavity of Zn-MOF to fabricate bimetallic Ce@Zn-MOF composites, which were covered in glassy carbon electrode (GCE) as sensors for the efficient recognition of uric acid (UA). The electrochemical behaviors of Zn-MOF and Ce@Zn-MOF-based sensor for UA were analyzed by cyclic voltammetry (CV) and differential pulse stripping voltammetry (DPV). The results showed that the Ce@Zn-MOF/GCE-based sensor exhibited sensitive identification ability for UA in phosphate buffered saline (PBS) solution (pH = 7.0) with a low detection limit (DL) of 0.51 ng in the recognition range of 0–300 ng mL−1. The results were attributed to that the introduction of Ce ions improved the charge conduction ability of Ce@Zn-MOF, thus enhancing the recognition sensitivity of Ce@Zn-MOF for UA, which can also be verified by theoretical calculation. In addition, Ce@Zn-MOF showed good stability, which can be ascribed to the bonding interaction between Ce ions and C/O atoms in Zn-MOF. Meanwhile, the Ce@Zn-MOF based sensor also exhibited high reproducibility and anti-interference ability for recognition of UA. In this work, the reasonable design of Ce@Zn-MOF based sensor provides a suitable platform for UA sensing rapidly and sensitively.

The key problem to be solved for the large-scale commercial application of direct urea fuel cells (DUFCs) is to develop a highly efficient catalyst for urea oxidation reaction (UOR). Some drawbacks such as scarcity and poor catalytic performance limit the application of noble metal-based catalysts in the oxidation of urea, it is particularly necessary to design and synthesize non-noble metal-based catalysts with good catalytic performance. In this work, we have fabricated Ni-based composites (Ni/NiO-N-C) through the pyrolysis of the precursor Ni(OH)2@PPH (polyaniline-polyvinyl alcohol hydrogels). The optimal Ni/NiO-N-C-500 catalyst displays an excellent activity of 182 mA cm−2 at 0.6 V vs SCE for UOR in alkaline media. Meanwhile, Ni/NiO-N-C-500 also indicates excellent stability after 1000 cycling CV tests (81% capacitance retention), which is attributed to the synergy between Ni/NiO nanocrystalline active centers and nitrogen-doped carbon substrate, that is, N-doped carbon layers improve the surface electron density and the electrical conductivity of the composite catalyst, thus leading to the improvement of the catalytic activity of catalyst. On account of its easy synthesis, high activity and good durability, the Ni/NiO-N-C-500 catalyst has the potential to act as a good alternative material for precious metal-based catalysts in DUFCs.

The Analog Hadronic Calorimeter (AHCAL) is one option of highly granular calorimeters optimised with the Particle Flow Algorithm (PFA) and considered for experiments at future lepton colliders. It consists of dense steel plates as absorber interleaved with plastic scintillator tiles, individually read out by Silicon Photomultipliers (SiPMs). A novel SiPM developed by the Novel Device Laboratory (NDL) with an active area of 1 mm2 and a pixel pitch of 12.5 micron[NDL-SiPM-12.5] has been mainly investigated. The characterisation studies include single photon calibration, dynamic range and performance of crosstalk as well as Minimum Ionising Particle (MIP) detection efficiency of a detector unit. Combined tests with a dedicated ASIC (SPIROC2E) for multi-channel SiPMs show that single photon spectra can be obtained, given the relatively small SiPM gain (∼2 × 105). The linearity of the SiPMs in response to incident photons of less than 10,000 (500 MIPs) is within 5% from measurements. Meanwhile, the dark count rate (DCR) is around 2×10-3 Hz at a threshold 0.5 MIP (10 p.e.) and the MIP detection efficiency of a detector unit can be near 95% from the MIP spectrum. These studies indicate the NDL-SiPM-12.5 can be a photosensor candidate for the future scintillator-based hadronic calorimeters.