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Due to its emulsifying and thickening properties, konjac glucomannan (KGM) is widely used in the food, medicine, and materials industries. Nevertheless, its high viscosity and significant water absorption limit its application range. Therefore, electron beam (e-beam) irradiation pretreatment was carried out to improve the deacetylation efficiency of KGM, and the physicochemical and gel properties of KGM were investigated. The results show that e-beam irradiation and deacetylation decrease the water absorption, solubility, transparency, molecular weight, and viscosity of KGM. Conversely, the moisture content, thermal stability, and water-binding capacity increase. FTIR and X-ray diffraction analysis revealed no significant changes in the chemical and crystalline structure of KGM before and after modification. However, modification weakens the intermolecular interaction of KGM hydrosols, which affects their rheology. Furthermore, deacetylation improves the mechanical properties and water retention capacity of KGM gels. Overall, the e-beam irradiation pretreatment provides a method to increase the efficiency of KGM deacetylation and improve the physical and chemical properties of KGM, thus expanding its potential applications in the food and chemical industries, among others. [ABSTRACT FROM AUTHOR]

Polyoxometalates containing titanium (Ti-POMs) related to semiconductor TiO2 have potential applications in photocatalysis, photovoltaics and semiconducting materials. In this paper, we synthesized a Ti-POM, Na2H10[Co4(H2O)2(TiW9O34)2]·48H2O (1), by one-pot self-assembly reaction. In its crystal architecture, sodium ions connect multiple monomer units to form a layered structure. The electrochemical properties of 1 were investigated by cyclic voltammograms. The semiconductor band gap (Eg) value of 1 was calculated through diffuse reflection UV-vis spectroscopy. Furthermore, 1 was used as a semiconductor material and applied to photoelectrochemical sensing to detect dopamine with different concentrations in aqueous solution. The above-mentioned results open up an opportunity to develop polyoxometalate-based, titanium-containing coordination complexes with functional properties and lay the foundation for detection of other biological targets. [ABSTRACT FROM AUTHOR]

A new coordination polymer (H2bpy)0.5⋅[(UO2)1.5(ipa)2(H2O)] (1) (H2ipa=isophthalic acid, bpy=4,4′‐bipyridine) was synthesized by hydrothermal condition. It was characterized by IR spectroscopy, elemental analysis, TG‐DTA analysis, and powder X‐ray diffraction. Analysis of single‐crystal X‐ray diffraction results showed that the title compound exhibited a double chain bridged by the different uranyl ions and ipa2− ligands. Through the hydrogen bond interactions and π⋅⋅⋅π stacking interactions, the double chains were assembled into the three‐dimensional supramolecular framework. Furthermore, the compound can be used as a promising bifunctional luminescence sensor for detecting and identifying Fe3+ and tetracycline hydrochloride antibiotic molecules with high selectivity and sensitivity in aqueous solutions. Moreover, the luminescent sensing mechanisms for different analytes were proposed. Moreover, the electronic properties of title compound were explored by density functional theory (DFT) calculations. The sensor system has been successfully applied for the detection of Fe3+ and tetracycline hydrochloride with high recovery percentages and low relative standard deviation in real river water samples. [ABSTRACT FROM AUTHOR]

In the study, thin Al xGa1− xN back barrier layer ( BBL) with different Al composition ( x) was employed in AlGaN/GaN HEMTs with GaN/AlN SLs schemes on Si substrate. The AlGaN BBL with low Al content ( x < 0.15) has no significant effect on the crystalline quality, while a higher Al content will induce more dislocations and cause surface defects. The DC I-V characteristics show that AlGaN BBL ( x = 0.1 and 0.15) is beneficial for obtaining high Ion/ Ioff ratio of 108 and improving the off-state behaviors with lower leakage current and higher breakdown voltage. The dynamic RON measurements were performed by applying the drain pre-bias switching and different quiescent bias pulse tests. It is shown that the AlGaN BBL can effectively suppress the RON, dynamic degradation, due to that the channel electrons trapped in the C-doping buffer were reduced by mitigating the electrons spill-over effect under the strong off-state bias. However, the device with higher Al-content AlGaN BBL exhibits a rising RON, dynamic caused by the surface defects related traps. Overall, the devices with 0.1 and 0.15 Al-content AlGaN BBL have an optimal performance. [ABSTRACT FROM AUTHOR]

A new bismuth-based polymer, [Hbpe][Bi(Hpydc) 2 (pydc)]·H 2 O (H 2 pydc=pyridine-2,5-dicarboxylic acid, bpe=trans-bis(4-pyridyl) ethylene) has been hydrothermally synthesized. Transient photocurrent response and electrochemical impedance spectroscopy studies indicate that the synthesized polymer with efficient charge separation and transportation can be used as a potential photocatalyst. So we use it for the degradation of rhodamine B (RhB) dye wastewater under visible light. The comparative study on commercial Bi 2 O 3 shows [Hbpe][Bi(Hpydc) 2 (pydc)]·H 2 O has the higher photocatalytic performance, with the degradation rate of 97% and 2% within 100 min for [Hbpe][Bi(Hpydc) 2 (pydc)]·H 2 O and commercial Bi 2 O 3 respectively. Additionally, the five cycle reproducibility results of [Hbpe][Bi(Hpydc) 2 (pydc)]·H 2 O implies that it can be used as a stable photocatalyst. [ABSTRACT FROM AUTHOR]

In this paper, self-assembly reactions of copper(II) ions, methoxybenzoate isomers and 2,2′-bipyridine yield two copper-oxygen polynuclear complexes: [Cu(bpy)(2-CHO)]·(2-CHO)·14HO 1, [Cu(bpy)(HO)(OH)]·4(3-CHO)·17HO 2, and a simple mononuclear complex [Cu(bpy)(HO)(4-CHO)] 3. (bpy = 2,2′-bipyridine, CHO = methoxybenzoate ion). Single crystal X-ray diffraction analyses reval that compound 1 is a dinuclear copper(II) complex which bridged by three carboxylate groups, and 2 presents a discrete step-like tetra-nuclear copper CuO core. Compound 3 shows a square pyramidal mononuclear geometry. The magnetic susceptibility of complex 1 measured from 2 to 300 K, revealed an antiferromagnetic interaction between the Cu(II) ions. Furthermore, the results about IR spectra and thermal analyses were discussed. [ABSTRACT FROM AUTHOR]

Reaction of copper salts and D-(–)-quinic acid (H5L) yielded three complexes, [Cu(H2O)(H3L)]2·2H2O1, [Cu(H2O)(H4L)(NO3)]n·(H2O)n2, and [Cu(H2O)(H4L)(ClO4)]n·(2H2O)n3. An interesting law was observed that solvent selection influenced the structural assemblies, namely, in an aqueous solution utilizing CuCl2·2H2O/Cu(NO3)2·6H2O/Cu(ClO4)2·6H2O and D-(–)-quinic acid only obtained [Cu(H2O)(H3L)]2·2H2O1,while the environment was replaced by an alcoholic system, afforded three polymers: [Cu(H2O)(H4L)Cl]n·(H2O)n4, [Cu(H2O)(H4L)(NO3)]n·(H2O)n2, and [Cu(H2O)(H4L)(ClO4)]n·(2H2O)n3, respectively. Complex1crystallizes in the polar monoclinicC2 space group, while complexes2and3in the nonpolar orthorhombic space groupP212121. In compound1, the binuclear Cu(II) units are assembled into 3D network through hydrogen bonds and the overall topology can be described as a 7-connected dinodal net topology of (36·48·57) with the Schläfli symbol of (3.3.3.3.3.3.4.4.4.4.4.4.4.4.5.5.5.5.52.52.52). In2and3, the D-(–)-quinic acid anions are function as tetradentate ligands bridging Cu(II) ions to build up 3D metal-organic frameworks (MOFs) with {103} topological representation. The polar complex1displays a promising ferroelectricity with a remnant polarization (Pr) ofca.0.07 μC/cm2, coercive field (Ec) ofca.2.43 kV/cm, and saturation of the spontaneous polarization (Ps) ofca.0.128 μC/cm2. The magnetic behavior of1suggests significant antiferromagnetic coupling interactions between Cu(II) ions bridged by carboxylic groups, while considerable ferromagnetic coupling interactions in complexes2and3. Furthermore, the title complexes1–3were subjected to microelement analyses, IR spectroscopic measurements, and thermal analyses. [ABSTRACT FROM PUBLISHER]

Two new complexes, [Cu(2,2′-bpy)(HO)( p-hbza)(OH)](NO)·2HO ( 1) and [Cu(2,2′-bpy)( p-hbza)(NO)]·2HO ( 2) ( p-Hhbza = p-hydroxybenzoic acid, 2,2′-bpy = 2,2′-bipyridine) were synthesized and characterized by single-crystal X-ray diffraction methods, elemental analyses, IR spectroscopy, thermal analyses as well as magnetic measurements. For compound 1, the trinuclear clusters is extended into 1D chains through hydrogen-bonding and further assembled into 2D supramolecular layers through hydrogen-bonding. The dinuclear clusters in 2 is pairwise aggregated to form H-bonded dinuclear motifs, which are held together by O-H···O hydrogen bonds into 1D chains and further assembled also via O-H···O hydrogen bonds into 2D supramolecular networks. Variable temperature magnetism of 1 and 2 suggests a weak ferromagnetic or antiferromagnetic coupling exchange ( J = 41.723 (4) cm for 1, J = −35.52 (5) cm for 2). [ABSTRACT FROM AUTHOR]

Four new 3D uranyl complexes, [(UO2)2(H2O)(ipa)2]·9H2O (1), [(UO2)2(H2O)(nip)2]·H2O·Et3NH (2), [(UO2)2(H2O)(aip)2]·Et3NH (3) and [(UO2)(hip)]2·17H2O (4) (H2ipa = isophthalic acid, H2nip = 5-nitroisophthalic acid, H2aip = 5-aminoisophthalic acid, H2hip = 5-hydroxyisophthalic acid, Et3N = triethylamine), were hydrothermally synthesized. Structural analyses reveal that compounds 1–4 consist of pentagonal bipyramidal uranyl monomers bridged via acid inkers to form a structural motif, [(UO2)2L2], serving as the foundation of the 3D framework. Two structural motifs adopt different arrangement modes to connect to two types of chains. For 1–3, uranium atoms and carboxyl groups being from two types of chains respectively are coordinated to build similar 3D frameworks, while for 4, one type of chain links to the 3D architecture by the bond of the uranium atoms and –OH of the 5-hydroxyisophthalic acid ligand. The different guest molecules and structure assemblies displayed by the four compounds are a function of the variation of substituent groups of 5-X-1,3-benzenedicarboxylic acid (X = –H, –NO2, –NH2, –OH). Furthermore, the photocatalytic properties of 2 and 4 for degradation of rhodamine-B (RhB) upon xenon lamp irradiation have been examined. Elemental analysis, infrared spectroscopy, DRS and luminescence properties were also discussed. [ABSTRACT FROM AUTHOR]

Two coordination polymers, Cu(bipy)(DBrS) 1 and Co(bipy)(HO)(DBrS) 2 with bipy = 2,2′-bipyridine, HDBrS = meso-2,3-dibromosuccinic acid represent rare examples of metal complexes with meso-2,3-dibromosucciniato ligand. Within 1, the CuNO octahedra are interlinked by DBrS anions in a μ- κΟΟ′: κΟ″Ο″′ coordination mode to form $${}_{\infty }^{1}$$ [Cu(bipy)(DBrS)] chains, which are further assembled into 2D supramolecular layers by interchain π···π stacking interactions. In 2, the six-coordinated Co ions are bridged by DBrS anions in a μ- κΟ: κΟ′ fashion to form $${}_{\infty }^{1}$$ [Co(bipy)(HO)(DBrS)] polymer chains and the adjacent 1D chains interconnected by weak C-H···O hydrogen bonds to construct 2D supramolecular layers. The temperature-dependent magnetic susceptibility shows that 2 obeys Curie-Weiss law χ = C/( T − Θ) with C = 2.16 cm K mol and Θ = −0.40 K and the best fit gave a weak antiferromagnetic coupling ( J = −0.89 cm) among Co ions. Results about infrared spectra and elemental analyses are also presented. Graphical Abstract: In the present paper, we have discussed the syntheses and crystal structures of two metal-organic based 1D polymers of Cu(II) and Co(II) respectively, and magnetic behavior in the temperature range 2-300 K of the Co(II) compound. The compounds feature 1D chains based on bridging dibromosucciniato. The Cu(II) compound represents the first example of meso-2,3-dibromosuccinic acid coordination polymers that exhibit μ- κΟΟ′: κΟ″Ο″′ coordination mode.[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

Three Cu(II) complexes, Cu2(bpy)(H2O)(Clma)2 (1), Cu2(bpe)(H2O)2(Clma)2 (2), and Cu(bpp)(Clma) (3), were synthesized (HClma = (R)-2-Chloromandelic acid, bpy = 4,4′-dipyridine, bpe = 1,2-di(4-pyridyl)ethylene, bpp = 1,3-di(4-pyridyl)propane). Complexes 1, 2, and 3 are constructed from 1-D coordination arrays generated from Cu2(H2O)(Clma)2, Cu2(H2O)2(Clma)2, and Cu2(Clma)2 moieties and linked through bpy, bpe, and bpp co-ligands, respectively. 1 and 2 are assembled into 3-D supramolecular networks via O–H⋯O hydrogen bonds with topology of (63)(69·8) and (412·63), respectively, and 3 is assembled into a 3-D architecture through C–H⋯O hydrogen bonds with topology of (43·63)(43)(44·65·8)(46·66·83). Compounds 1, 2, and 3 crystallized in acentric space groups P21, P1, and P21, which exhibit significant ferroelectricity (remnant polarization Pr = 0.008 μC cm−2, coercive field Ec = 21.4 kV cm−1, the spontaneous saturation polarization Ps = 0.167 μC cm−2 for 1, Pr = 0.183 μC cm−2, Ec = 1.69 kV cm−1, and Ps = 0.021 μC cm−2 for 3). Results from infrared and thermal analyses are also discussed. [ABSTRACT FROM AUTHOR]

One-pot reactions of Cu(ClO4)2·6H2O, phenanthroline (phen), malonic acid (H2mal) and NaOH in molar ratio 1:1:1:2 (mmol) in 40mL H2O/MeOH afforded two novel complexes [Cu2(phen)2(H2O)3(mal)(ClO4)](ClO4) ([4]ClO4) and [Cu6(phen)6(H2O)2(mal)4(ClO4)2](ClO4)2 ([5](ClO4)2) besides three known complexes [Cu(phen)2(H2O)](ClO4)2 ([1](ClO4)2), [Cu(phen)(H2O)(mal)]·1.5H2O ([2]·1.5H2O) and [Cu3(phen)3(H2O)2(mal)3]·11H2O ([3]·11H2O). Complexes [2]·1.5H2O, [3]·11H2O, [4]ClO4 and [5](ClO4)2 commonly have a basic building motif of a general formulation [Cu(phen)(mal)X] n with the Cu square-pyramidally coordinated by phen molecule, (mal−) anion and an apical X group (X=H2O, ClO4 −, [Cu(phen)(H2O)(mal)], n =0, +1). [3]·11H2O is built up of the hydrogen-bonded [Cu3(phen)3(H2O)2(mal)3] trimers and (H2O)11 clusters, while [4]ClO4 and [5](ClO4)2 feature 1D {[Cu2(phen)2(H2O)3(mal)](ClO4)2/2}+ chain and hexanuclear [Cu6(phen)6(H2O)2(mal)4(ClO4)2]2+ complex cations, respectively. Self-assembly routes to the malonate-based Cu(II) phenanthroline complexes were well established on the basis of the [Cu(phen)(H2O)(mal)] complex molecule. Both acentric polar complexes [3]·11H2O and [4]ClO4 represent the first two examples of metal malonato complexes with ferroelectric property with a remnant polarization (Pr) of ca. 0.045 and 0.2002μCcm−2, coercive field (Ec) of ca. 0.70 and 1.79kVcm−1, and saturation of the spontaneous polarization (Ps) at ca. 0.39 and 0.248μCcm−2, respectively. The magnetic properties of [4]ClO4 and [5](ClO4)2 follow Curie–Weiss law χm = C/(T − Θ) with the Curie constant C =0.480(2), 0.587(7)cm3 mol−1 K and Weiss constant Θ =0.32(1), 0.61(2)K, respectively. The weak ferromagnetic behaviors can be well analyzed using dinuclear Cu2 and V-shaped trinuclear Cu3 models, respectively, and best-fittings gives J =6.2(6)cm1 for equatorial–equatorial syn–anti μ-COO groups. [ABSTRACT FROM AUTHOR]

Self-assemblies of the 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) and Cu(OH)2in the presence of dicarboxylate ligands yielded four new complexes, [Cu4(bpca)4(L1)2(H2O)2]·5H2O (1), [Cu2(bpca)2(L2)(H2O)2]·2H2O (2), [Cu2(bpca)2(L3)(H2O)2]·H2O (3), and [Cu2(bpca)2(L4)(H2O)2]·3H2O (4) (bpca = bis(2-pyridylcarbonyl)amide anion, H2L1 = phthalic acid, H2L2 = succinic acid, H2L3 = maleic acid, H2L4 = acetylenedicarboxylic acid). Their structures were determined by single-crystal X-ray diffraction analyzes and further characterized by IR spectra and thermogravimetric analyzes. The five-coordinate Cu ions in1are bridged by phthalate to form 1-D chains, which are assembled into 3-D frameworks by extensive hydrogen bonds. Compounds2–4possess similar structures, built up of [Cu2(bpca)2(L)(H2O)2] (L = L2 for2, L3 for3, L4 for4) and lattice molecules. The 3-D frameworks of2–4are completed by hydrogen bond interactions. [ABSTRACT FROM PUBLISHER]

The title compound [Mn(bpp)2(C4O4)]·H2O (1) was obtained by reaction of acetylenedicarboxylic acid, fresh MnCO3and 1,3-bis(4-pyridyl)propane (bpp) in aqueous ethanol solution under 80°C. The Mn ions are bridged by acetylenedicarboxylate into a 1D zigzag chain, which is interlinked by bpp ligand to generate a 3D six-connected framework with the Schläfli symbol (48·67). The temperature dependence of the magnetic susceptibility of the complex follows the Curie-Weiss law, and the magnetic behavior can be interpreted by means of 1D chain model. The best fit results in J = 0.03(1) cm−1, indicating weak ferromagnetic coupling. [ABSTRACT FROM AUTHOR]

Three new pyridine-2,3,5,6-tetracarboxylato (H4pdtc) complexes K2[Mn(H2O)(pdtc)]·3H2O 1, Na2[M3(H2O)6(pdtc)2]·6H2O (M=Mn 2, Co 3) were obtained and characterized by single-crystal X-ray diffraction methods and magnetic measurements. The characteristic building blocks of 1–3 are the pdtc bridged stair-like chains {[M(H2O)](pdtc)3/3}2–, which results from the six-coordinated transition metal atoms bridged by pdtc4− ligands. The infinite chains in 1 are assembled by hydrogen bonds into 2D supramolecular networks, which are held together by (4·82) topological K+–H2O networks to complete 3D architecture. While the stair-like chains in 2 and 3 are interconnected by trans-[M(H2O)4]2+ moieties to 2D polymeric layers, which are bridged by dimeric [Na2(μ-H2O)2(H2O)2]2+ moieties to build up 3D framework. The magnetic properties of 1–3 were analyzed on the basis of (i) linear trinuclear M3 models and (ii) the free Mn2+ and Co2+ ions with the zero-field splitting effect and spin–orbit coupling effect, respectively. [ABSTRACT FROM AUTHOR]

Abstract: Three Mn(II) polymers Mn(H2O)4(C5H6O4) 1, [Mn(H2O)2(C5H6O4)]·H2O 2 and Mn(H2O)(C6H8O4) 3 were synthesized (H2(C5H6O4) = glutaric acid, H2(C6H8O4) = adipic acid) under mild ambient conditions. The [Mn(H2O)2]2+ units in 2 are interlinked by the glutarate anions with a η4μ3 bridging mode to form 2D (4·82) topological networks, which are stacked via interlayer hydrogen bonds into a 3D (43·65·82)(47·63) topological net. Compound 3 crystallizes in the acentric space group P21 and exhibits significant ferroelectricity (remnant polarization Pr = 0.371 nC cm−2, coercive field Ec = 0.028 kV cm−1, saturation of the spontaneous polarization Ps = 0.972 nC cm−2). The adjacent MnO6 octahedrons in 3 are one atom-shared to generate the Mn2O11 bi-octahedron, leading into 1D metal oxide chains. The resulting chains are interconnected by the η5μ5 adipate anions to form new 2D (48·62) networks, which are held together via strong interlayer hydrogen bonds into 3D α-Po topological supra-molecular architecture. The temperature-dependent magnetic susceptibility data of 1–3 shows overall anti-ferromagnetic interactions between the metal ions bridged by the carboxylate groups. [Copyright &y& Elsevier]

The influence of pH for the reaction system involving CuCl2 · 2H2O, imidazole (Him) and phenylacetic acid (HL) at room temperature was investigated. Cu2(Him)4L4 · 2H2O (1) and Cu3(Him)2(im)2L4 (2) were synthesized at pH 6.5 and 7.5, respectively. In 1, the Cu is coordinated by two nitrogen atoms of two Him and three oxygen atoms from three phenylacetates to form a square pyramid CuN2O3. Adjacent square pyramids share edges to form Cu2N4O4 dimers, which are assembled by hydrogen bonds into a 2-D layer parallel to the (001) plane. In 2, copper atoms are interlinked by im− and L− to form a 2-D layer parallel to (100). The resulting layers have C–H···O hydrogen bonds leading to a 3-D supramolecular architecture. Variable temperature magnetism of 1 and 2 suggests a weak ferromagnetic or antiferromagnetic coupling exchange (J = 0.58 cm−1 for 1, J = −10.24 cm−1 for 2). [ABSTRACT FROM PUBLISHER]

The reaction of malonic acid (HOOCCH2COOH), Zn(NO3)2·6H2O, 4,4′-dipyridyldisulfide (bpds) and NaOH in aqueous methanol solution under ambient conditions yielded a new complex Zn2(bpds)2(C3H2O4)2(H2O)2. The complex has been characterized by single-crystal X-ray diffraction, IR spectroscopy, TG-DTA analyses, elemental analyses, and powder X-ray diffraction. The Zn atoms are octahedrally coordinated by one nitrogen atom and five oxygen atoms to complete a ZnNO5 octahedra, which is bridged by malonato ligands to generate 2D sheets with the bpds acted as terminal ligand. The resulting 2D sheets are stacked in an ···ABABAB··· sequence due to van der Waals forces. [ABSTRACT FROM AUTHOR]

Abstract: Three new butane-1,2,3,4-tetracarboxylato bridged coordination polymers [Zn2(H2O)4(BTC)]·3H2O 1, [Cd2(H2O)4(BTC)]·2H2O 2 and [Y2(H2O)6(H2BTC)(BTC)]·5H2O 3 (H4BTC=butane-1,2,3,4-tetracarboxylic acid) were synthesized and characterized by IR spectroscopy, TG–DTA analyses, elemental analyses and single-crystal X-ray diffraction, and their fluorescence properties were also investigated. In 1, the trigonal pyramidally coordinated Zn atoms are brigded by both μ6η6 and μ6η8 centrosymmetric BTC4− anions into 2D layers, which are connected by the octahedrally coordinated Zn atoms to build up 3D (44·610·8)(44·62)2(44·68·82·10) topological framework with the lattice water molecules in cavities. In 2, the CdO7 pentagonal bipyramids and the CdO8 4,4′-bicapped triagonal antiprisms are edge-shared to generate the Cd2O13 bipolyhedra, which are further corner-shared into 1D metal-oxide chains. The resulting chains are interconnected by the μ6η8 BTC4− anion to form 2D (43)2(46·66·83) networks, which are assembled via interlayer hydrogen bonds into a 3D (411·611·86)(43)(49·6) topological supramolecular architecture with the lattice H2O molecules located in holes. The distorted 4,4′-bicapped triagonal antiprismatically coordinated Y atoms in 3 are interconnected μ4η4 H2BTC2− and μ 4η6 BTC4− anions to from 2D (44·62) topological networks, which are held together via strong interlayer hydrogen bonds into a 3D fsc topological supramolecular architecture with the lattice water molecules residing in cavities. [Copyright &y& Elsevier]

A novel dinuclear nickel(II) complex Ni2(NO3)4(APTY)4 (1) (APTY = 1,5-dimethyl-2-phenyl-4-{[(1E)-pyridine-4-ylmethylene]amino}-1,2-dihydro-3H-pyrazol-3-one), was synthesized by solvothermal reaction of Ni(NO3)2 · 6H2O with APTY in methanol at 353 K. The structure consists of centrosymmetric dimers resulting from octahedrally coordinated Ni atoms bridged by APTY ligands. Weak intermolecular interactions (C-H ··· N, C-H ··· O hydrogen bonding, C-H ··· π and π-π stacking interactions) are responsible for a supramolecular assembly of molecules in the lattice. Magnetic measurements over 1.8-300 K show weak antiferromagnetic coupling between Ni(II) ions with J = 2.969 cm-1, g = 2.280, θ = -5.903. [ABSTRACT FROM AUTHOR]

Reactions of copper(II) chloride and malonic acid with the corresponding alkali metal carbonate in the presence of imidazole in aqueous methanol at pH&ThickSpace;=&ThickSpace;4.2–6.0 yielded K 2 Cu(mal) 2 &ThickSpace;·&ThickSpace;3H 2 O (1), Rb 2 Cu(mal) 2 &ThickSpace;·&ThickSpace;H 2 O (2) and Cs 2 [Cu(H 2 O) 2 (mal) 2 ]&ThickSpace;·&ThickSpace;2H 2 O (3) (H 2 mal&ThickSpace;=&ThickSpace;malonic acid). In 1, octahedrally coordinated Cu atoms are interlinked by malonate anions to generate 2D [Cu(mal) 4/2 ] 2– anionic layers, between which the K + cations are sandwiched. The 1D anionic [Cu(mal)(mal) 2/2 ] 2– chain in 2 is generated from square pyramidally coordinated Cu atoms bridged by malonate anions and is held together by Rb + cations. The cesium compound consists of Cs + cations and trans -[Cu(H 2 O) 2 (mal) 2 ] 2– anions with Cu atoms octahedrally coordinated. Diminution in dimensionality from the 2D [Cu(mal) 4/2 ] 2– anionic layer in 1 through the 1D anionic [Cu(mal)(mal) 2/2 ] 2– chain in 2 to trans -[Cu(H 2 O) 2 (mal) 2 ] 2– anions in 3 could be attributed to the replacement of the smaller alkali cation by the larger one. IR spectroscopic, magnetic and thermal data are discussed. [ABSTRACT FROM AUTHOR]

Reaction of CuCl2·2H2O, 1,10-phenanthroline (phen) and pimelic acid with Na2CO3 in aqueous methanol afforded a mixture consisting of [Cu2(phen)2(H2O)2(C7H10O4)2]·4H2O ( 1 ), α-[Cu2(phen)2(C7H10O4)2]·4H2O ( 2 ) and β-[Cu2(phen)2(C7H10O4)2]·4H2O ( 3 ) at pH&ThickSpace;=&ThickSpace;5.8. The structure of compound 1 has been reported earlier, and consists of hydrogen bonded H2O molecules and dinuclear [Cu2(phen)2(H2O)2(C7H10O4)2] molecules generated from pimelate anions, acting as bis(monodentates), bridging square pyramidal Cu ions. The structures of dimorphs 2 and 3 have been established using single-crystal X-ray diffraction methods. They are monoclinic and triclinic, respectively ( 2 : C 2/ c , a &ThickSpace;=&ThickSpace;20.344(2), b &ThickSpace;=&ThickSpace;9.828(1), c &ThickSpace;=&ThickSpace;20.802(2)&ThickSpace;Å, β&ThickSpace;=&ThickSpace;116.10(7)°, Z &ThickSpace;=&ThickSpace;4, D calc&ThickSpace;=&ThickSpace;1.558&ThickSpace;g&ThickSpace;cm -3 ; 3 : ī, a &ThickSpace;=&ThickSpace;10.124(2), b &ThickSpace;=&ThickSpace;10.658(2), c &ThickSpace;=&ThickSpace;10.847(2)&ThickSpace;Å, α&ThickSpace;=&ThickSpace;111.36(3), β&ThickSpace;=&ThickSpace;116.27(3), γ&ThickSpace;=&ThickSpace;93.80(3)°, Z &ThickSpace;=&ThickSpace;1, D calc&ThickSpace;=&ThickSpace;1.529&ThickSpace;g&ThickSpace;cm -3 ). The structures of all three complexes are compared. Both 2 and 3 are composed of hydrogen bonded H2O molecules and polymeric chains, in which dimeric Cu2N4O4 units with square pyramidal coordination geometry are bridged by pimelate anions. The dinuclear molecules in 1 and polymeric chains in 2 and 3 are assembled via π–π stacking and weak C–H···O hydrogen bonds into 2D layers, linked by hydrogen bonds. [ABSTRACT FROM AUTHOR]

Reaction of freshly precipitated Fe m (OH) n (CO3)3 m - n /2· x H2O, fumaric acid (H2L) and 1,10-phenanthroline (phen) in aqueous ethanol solution under ambient conditions yielded a new complex [Fe(phen)3]L·2H2L·4H2O, which crystallizes in space group P i with a ?= 12.126(1), b ?=?12.493(2), c ?=?17.014(2)?Å, a ?=?77.26(1), ß?=?89.786(8), ??=?63.260(8)°, Z ?=?1, D calc?=?1.506?g?cm -3 . The title compound consists of [Fe(phen)3] 2+ complex cations, fumaric acid molecules, fumarate anions and hydrogen-bonded water molecules. Fe atoms are octahedrally coordinated by six nitrogen atoms of three phenanthroline ligands. The fumaric acid molecules, fumarate anions and water molecules build up a hydrogen-bonded anionic framework with the [Fe(phen)3] 2+ complex cations in channels assembled into columnar chains through p–p stacking interactions. IR spectra and thermal analyses are discussed. [ABSTRACT FROM AUTHOR]

Two fumarato-bridged coordination polymers M(H2O)2(C4H2O4), with M?=?Cu (1) and Cd (2), were prepared and structurally characterized using single-crystal X-ray methods. In 1, Cu atoms are coordinated by two aqua oxygen atoms at trans positions and three oxygen atoms of different fumarate anions to form a square pyramid; two adjacent CuO5 square pyramids share edges to form Cu2O8 dimers. Cd atoms in 2 are coordinated by seven oxygen atoms of two aqua ligands and three different fumarate anions to form a distorted pentagonal bipyramid, with two adjacent pentagonal bipyramids sharing a common edge to form Cd2O12 dimers. Both dimers in 1 and 2 are bridged by fumarato ligands to generate open layers with a (4,?4) topology. Close packing of the layers prevents formation of porous 3D networks. The magnetic behavior of 1 was investigated. [ABSTRACT FROM AUTHOR]

Reaction of freshly prepared Zn(OH) 2-2 x (CO 3 ) x · y H 2 O with fumaric acid in CH 3 OH/H 2 O (1:1 v/v) at room temperature afforded [Zn(H 2 O) 4 (C 4 H 2 O 4 )]·H 2 O. An X-ray structure determination indicates that the title compound consists of hydrogen bonded H 2 O molecules and polymeric chains, , resulting from Zn atoms bridged by bis -monodentate fumarate anions. The Zn atoms are octahedrally coordinated by six oxygen atoms of four aqua ligands and two different fumarate anions with the carboxylato oxygen atoms in cis positions. Supramolecular assembly of the polymeric chains is due to extensive hydrogen bonding interactions. Thermal analysis shows that [Zn(H 2 O) 4 (C 4 H 2 O 4 )]·H 2 O decomposes in two steps upon heating; initial endothermic dehydration over 45-80°C is followed by decomposition of anhydrous zinc fumarate at 360-825°C. [ABSTRACT FROM AUTHOR]

Two succinato-pillared coordination polymers Mn5(OH)2L4 1 and Cd3(OH)2L2 2 were prepared by hydrothermal reactions of succinic acid (H2L&z.dbnd;HOOC(CH2)2COOH) and KOH with the corresponding metal chlorides at 180°C. Within 1, the adjacent MnO6 octahedra are edge shared to generate Mn5O22 pentamers, which are interconnected to form 2D manganese oxide layers stabilized by the intralayer gauche succinato groups within the aperture. The manganese oxide layers are pillared by the interlayer trans succinato groups to complete 3D framework. The magnetic behavior of 1 obeys Curie–Weiss law χm(T−Θ)=4.46(2) cm3 mol−1 K with the Weiss constant Θ=−67.3(3) K over the temperature range 5−300 K. Compound 2 contains CdO6 octahedra and edge-shared Cd2O10 bi-octahedra. The former CdO6 octahedra are each surrounded by four Cd2O10 bi-octahedra which in turn are each surrounded by four former CdO6 octahedra and four neighboring Cd2O10 bi-octahedra, thus resulting in the corrugated cadmium oxide layers. The formed 2D layers are pillared by trans succinato groups to constitute 3D coordination polymer. Additionally, thermal decomposition of both title coordination polymers upon heating in a flowing nitrogen atmosphere from room temperature to 800°C is discussed. Crystal data: (1) monoclinic, P21/c, Z=2, a=9.575(2) A˚, b=9.611(2) A˚, c=12.526(3) A˚, β=97.04(2)°, V=1144.0(4) A˚3, R1=0.0289 and wR2=0.0815 for 2411 observed reflections (I&ges;2σ(I)) out of 2629 unique reflections; (2) orthorhombic, Pbca, Z=4, a=10.679(1) A˚, b=6.873(1) A˚, c=16.996(2) A˚, V=1247.5(3) A˚3, R1=0.0234 and wR2=0.0585 for 1213 observed reflections (I&ges;2σ(I)) out of 1437 unique reflections. [Copyright &y& Elsevier]

A suberato-pillared Mn(II) coordination polymer Mn2(H2O)(C8H12O4)2 was hydrothermally synthesized at 170°C for 3 days and characterized by single-crystal X-ray diffraction. Crystal data: monoclinic, C2/c, Z=4, a=26.544(5), b=7.617(2), c=9.187(2) A˚, β=105.38(2)°, V=1791.0(7) A˚3, R1=0.064 and wR2=0.162. The compound shows a layered structure consisting of inorganic Mn oxygen polyhedral layers and organic regions. The inorganic Mn oxygen layers are generated from Mn2O10 bioctahedral units, which share corners with neighbors to form zigzag chains along the [001] direction and are, along the [010] direction, further connected by carboxylate groups of the suberato ligands and hydrogen bonds. The magnetic studies indicated that the compound becomes antiferromagnetic at low temperatures with TNe´el=12 K and follows Curie–Weiss law χm(T+22.429)= 4.48 cm3 mol−1 K between 25 and 300 K. Upon heating in Ar stream, Mn2(H2O)(C8H12O4)2 decomposes in three steps. [Copyright &y& Elsevier]

[Mn(H2O)3(phen)(C4H4O4)]·2H2O was obtained by reaction of freshly prepared MnCO3, phen and succinic acid in CH3OH/H2O (1:1 v/v), and its crystal structure has been determined by single crystal X-ray diffraction methods. The title mixed ligand complex crystallizes in the triclinic space group $$P\bar 1$$ with cell dimensions a = 7.590(1) Å, b = 9.324(1) Å, c = 13.917(1) Å, α = 85.64(1)°, β = 74.56(1)°, γ = 77.10(1)°, and Dcalc = 1.584 g/cm3 for Z = 2. The crystal structure consists of the [Mn(H2O)3(phen)(C4H4O4)] complex molecules and lattice H2O molecules. The Mn atoms are each octahedrally coordinated by two N atoms of one phen ligand and four O atoms of three H2O molecules and one succinato ligand with d(Mn—N) = 2.271 and 2.299 Å, and d(Mn—O) = 2.133–2.239 Å. Through intermolecular hydrogen bondings, the complex molecules are interlinked to form 2D layers, which are assembled by π–π stacking interactions into 3D framework with tunnels occupied by the lattice H2O molecules. Thermal analyses showed that the title compound decomposes in two steps over the range 25–600°C upon heating in flowing Ar. [ABSTRACT FROM AUTHOR]

Four Ag-based coordination polymers, Ag 4 (H 2 O) 2 (npth) 2 ( 1 ), Ag 4 (epyz) 2 (npth) 2 ( 2 ), [Ag(pyz)(Hnpth)]·H 2 O ( 3 ) and Ag(epyz) 0.5 (Hnpth) ( 4 ) (H 2 npth = 3-nitrophthalic acid, pyz = pyrazine, epyz = 2,3,5,6-tetramethylpyrazine), have been synthesized by ultrasonic or hydrothermal reactions of Ag(I) salts with H 2 npth and various pyrazine derivatives ligands. Compound 1 presents a 2D 4 4 -sql network with Ag 4 units, and compound 2 features novel cage-like Ag 8 SBUs (secondary building unit), which are linked by epyz ligands to form a 3D framework. Compound 3 shows a 1D chain and compound 4 exhibits a 2D coordination polymer construction. The photocatalytic properties for the degradation of organic dye molecules have been examined, and the experiments show that compound 3 has a good degradation effect to Rhodamine B. [ABSTRACT FROM AUTHOR]

Two new supramolecular complexes [Ag 2 (MA) 2 (2-nbd)]·2.5H 2 O ( 1 ) and [Ag 2 (MA) 2 (3-npa)]·2H 2 O ( 2 ) (2-H 2 nbd = 2-nitroterephthalic acid; MA = melamine; 3-H 2 npa = 3-nitrophthalic acid) have been synthesized under ultrasound conditions and characterized by infrared spectra (IR), thermogravimetric analysis (TGA), elemental analyses (EA) and X-ray diffraction (XRD). Complex 1 exhibits 2D framework through the bridging of carboxylic acid ligand and melamine ligand. Complex 2 presents a binuclear silver structural unit, which was further construct to three-dimension structure via hydrogen-bond interaction. The photocatalytic performance and photoluminescent properties of them were also investigated. And the results show that complex 1 and 2 exhibited good photocatalytic activity towards the degradation of Rhodamine B (RhB) and Methylene Blue (MB) under visible light irradiation. Moreover, it is verified that the degradation rate fits the first-order kinetics. [ABSTRACT FROM AUTHOR]

An uranium coordination polymer, namely [(UO 2 (pydc)(H 2 O)]·H 2 O ( 1 ) (H 2 pydc=2,5-pyridinedicarboxylic acid), has been obtained by hydrothermal method and characterized by X-ray single crystal structure determination. Structural analysis reveals that complex 1 exhibits 1D chain coordination polymer, in which UO 2 2+ ions are bridged by 2,5-pyridinedicarboxylate ligands and the chains are connected into a 3D supramolecular network by O–H···O hydrogen bond interactions and π–π stacking interactions. The photocatalytic properties of 1 for degradation of methylene blue (MB), Rhodamine B (RhB) and methyl orange (MO) under Hg-lamp irradiation have been performed, and the amount of the catalyst as well as Hg-lamp irradiation with different power on the photodegradation efficiency of MB have been investigated. Elemental analyses, infrared spectroscopy, TG-DTA analyses and luminescence properties were also discussed. [ABSTRACT FROM AUTHOR]

This study investigated the effects of microwave (MW, 300W, 900W), electron beam irradiation (EBI, 8, 24 KGy), and their combination (MW-EBI, EBI-MW) on the morphology, structure and physicochemical properties of red adzuki bean starch. MW or EBI treatments had little effect on starch morphology, but high-frequency MW and high doses of EBI combined modification resulted in starch granule cracking. Both EBI and MW treatments retained the C-type crystalline structure of the starch but reduced the relative crystallinity, Mw, and short-range ordering. Besides, starch's short chain (A, B 1) content, pasting temperature, solubility, and RDS content were significantly increased. In contrast, long chain (B 2 , B 3), SDS + RS content, ΔH, SP, and RDS content were decreased considerably after MW and EBI treatments. Furthermore, the effect of MW and EBI combined modification on starch was higher than the single modification, and the MW-EBI modification was more effective than EBI-MW. Therefore, this study provides a green and efficient method to modify starch, which helps to broaden the scope of starch application. [Display omitted] • E-beam irradiation (EBI) and microwave (MW) treatment increased starch's short chain content. • EBI-WM treatment reduced starch's molecular weight and relative crystallinity. • EBI-WM treatment increased starch's solubility and pasting temperature. • WM pretreatment-EBI posttreatment on starch's effects were more significant. [ABSTRACT FROM AUTHOR]

To further explore the wonder of nano technology in drug delivery system, the combination of micelles and mesoporous silica was conducted for delivering poorly water soluble nifedipine (NFP). Double-nano silica xerogel (DN-SX) with both micelles and nanopores was prepared and silica xerogel with only nanopores (SN-SX) was made for comparison. Characteristics of DN-SX and SN-SX, including morphology, porous structure and crystalline state were investigated and pharmaceutical performances of drug loaded carriers were studied. The micelles in DN-SX contributed to achieve larger mesopores and enhanced NFP dissolution better than SN-SX. How responses of drug release amount and reduced drug release amount reacted as changing each influencing factor was elucidated by Box–Behnken experimental design. With the DN-SX obtained by optimization, in vivo pharmacokinetic study result demonstrated that the relative bioavailability of NFP loaded DN-SX and NFP loaded SN-SX were 216.84% and 161.14%, respectively. Therefore, the optimized DN-SX with double-nano structure was of great value for designing poorly water soluble drug delivery system. Image 1 • Double-nano silica xerogel (DN-SX) with micelles and nanopores was prepared. • The micelles in DN-SX contributed to obtain large mesopores around 10 nm. • Pore diameter was the determined factor for drug release amount. • The optimized DN-SX presented superior nifedipine delivery effect. [ABSTRACT FROM AUTHOR]

• Three new 3D uranyl-organic frameworks have been synthesized. • Compounds 1 and 3 have good degradation effect to tetracycline hydrochloride. • Compound 2 can be used as adsorbent for removal of TC in the aqueous solution. Nitroterephthalic acid (H 2 ntp), 2,5-dibromoterephthalic acid (H 2 bdc) and N,N′-donor ligands have been employed to synthesize three uranyl compounds: (H 2 -tmp)[(UO 2)(ntp) 2 ]·H 2 O (1), (2,2′-Hbpy)[(UO 2) 2 (ntp) 2.5 ]·H 2 O (2) and [(UO 2)(bdc)(4,4′-bpy) 0.5 ] (3) [where 2,2′-bpy = 2,2′-dipyridyl, 4,4′-bpy = 4,4′-dipyridyl, tmp = tetramethylpyrazine]. Single-crystal X-ray crystal structures of compounds 1 – 3 have been determined. Compounds 1 and 2 consist of dinuclear units, which are linked by ntp2− ligands on the equatorial plane to form 2D network, the layers are further bridged by the carboxylate at the angles of 118.69° (1) and 106.18° (2) in the axial position to form the 3D frameworks. In compound 3 , each uranyl center is bridged by four bdc2− ligands to form a 3D framework with the carboxylate at the angle of 73.96° on the equatorial plane, and the 4,4′-bpy further consolidates the crystal structure. Compounds 1 – 3 have been characterized by IR, powder X-ray diffraction, UV-vis absorption spectroscopy, thermogravimetric analysis and photoluminescence spectroscopy. In addition, the photocatalytic degradation of 1 , 3 and the performance for tetracycline hydrochloride adsorption of 2 have been investigated. [ABSTRACT FROM AUTHOR]

Two new uranyl compounds [NH 4 ][(UO 2 )(ipa) 1.5 ]·H 2 O 1 and [(UO 2 ) 2 ( μ 2 OH)( μ 3 OH)(ipa)(H 2 O)]·H 2 O 2 (H 2 ipa = isophthalic acid) have been synthesized under hydrothermal conditions and characterized by infrared spectra (IR), thermogravimetric analysis (TGA), elemental analyses and X-ray diffraction (XRD). Structural analysis reveals compound 1 exhibits two-dimensional (2D) framework through the bridging of ipa 2− anions, which was further construct to three-dimensional (3D) structure via π–π stacking interaction. Compound 2 presents a tetranuclear building block [(UO 2 ) 4 ( μ 2 OH) 2 ( μ 3 OH) 2 (H 2 O) 2 ] unit which was linked via μ 3 η 4 coordination mode ipa 2− anions to form one-dimensional (1D) chains structure. The fluorescence properties of the two compounds were investigated. The photocatalytic performance of compound 2 was also investigated and the results show that compound 2 exhibits good photocatalytic activity toward the degradation of tetracycline antibiotics under LEDs irradiation. [ABSTRACT FROM AUTHOR]

A new family of Ag(I) coordination polymers, [Ag(pyz)(Hntph)]·2H 2 O ( 1 ), Ag(dpyz) 2/2 (Hntph) ( 2 ), Ag(epyz) 2/2 (Hntph) ( 3 ) and Ag(4,4′-bipy)(Hntph) ( 4 ), has been solvothermally prepared by the assembly of Ag(I), H 2 ntph and various N-donor ligands, respectively (H 2 ntph = nitroterephthalic acid, pyz = pyrazine, dpyz = 2,5-dimethyl pyrazine, epyz = 2,3,5,6-tetramethylpyrazine, 4,4′-bipy = 4,4′-bipyridine). Complex 1 exhibits a 1D structure constructed by the binuclear [Ag 2 (Hntph) 2 ] units and pyz ligands. Complex 2 is a robust 3D metal organic compound with a novel 6 6 topological net. Complex 3 shows a 2D layer with binuclear [Ag 2 (Hntph) 2 ] unit which different from complex 1 and complex 4 exhibits a 1D coordination polymer construction. The structures of complexes 1 – 4 have been determined by single-crystal X-ray diffraction analyses and characterized by infrared spectra (IR), thermogravimetric analyses (TGA) and powder X-ray diffraction (PXRD) analyses. Moreover, the optical band gaps of 1 – 4 , and the photocatalytic properties of 3 , 4 under the light of 90 W white LED lamp have also been investigated. [ABSTRACT FROM AUTHOR]

In this paper, two new uranyl complexes (H 2 -bpp)[(UO 2 )( p -nba) 3 ] 2 1 and (H 2 -bipy)[(UO 2 ) 4 ( μ 3 –O) 2 ( p -nba) 6 ] 2 were synthesized by hydrothermal method base on the reaction of UO 2 Ac 2 ·2H 2 O as the metal sources, p -nitrobenzoic acid (H p -nba), 4,4′-bipyridine (bipy) and 1,3-di(4-pyridyl)-propane (bpp) as the ligands in an aqueous system. Complex 1 exhibits two crystallographically unique uranyl cation of 8-fold coordinated. Complex 2 presents a μ 3 -oxido bridged tetranuclear uranyl structural unit of edge-sharing polyhedral connection mode. These complexes were characterized by elemental analyses, IR spectra, thermogravimetric analyses (TGA), UV−Vis spectra and powder X-ray diffraction (XRD) patterns. The photoluminescence properties were investigated for the two complexes. 1 and 2 exhibit good photocatalytic activities for degradation of tetracycline hydrochloride (TC) under visible light irradiation. Moreover, it is verified that the kinetics of degradation rate was well described by the pseudo-first-order kinetics. [ABSTRACT FROM AUTHOR]

Highlights: [•] 1 represents a rare topological example of 2D→3D interlocking systems. [•] 2 and 3 all exhibit a (3,4)-connected novel network topology. [•] The magnetic characterizations suggest π–π stacking interactions to be effective pathways. [Copyright &y& Elsevier]

Abstract: Two lanthanide pyridine-2,4,6-tricarboxylate coordination polymers [Ln2(H2O)9(ptc)2]·3H2O (Ln=Dy(1), Yb(2); H3ptc=pyridine-2,4,6-tricarboxylic acid) have been synthesized and structurally characterized by single-crystal X-ray diffraction. The compound 1 and 2 is isostructural, and the feature of structure is a centrosymmetric tetra-nuclear unit, which is assembled into a 3D supra-molecular architecture via extensively hydrogen bonding interaction. The luminescence experiments show that compound 1 exhibit the typical luminescence of Dy3+ ion in the visible region. Besides luminescence, the magnetic properties of 1 and 2 were investigated and indicated the anti-ferromagnetic couplings between the Ln(III) ions. [Copyright &y& Elsevier]

Abstract: Two new lanthanide-pyridine-2,4,6-tricarboxylate coordination polymers [Pr(H2O)3(ptc)]⋅H2O (1) and [Tb2(H2O)9(ptc)2]·3H2O (2) (H3ptc = pyridine-2,4,6-tricarboxylic acid) have been synthesized and structurally characterized by single crystal X-ray diffraction. The compound (1) crystallize as 2D layer, which are further engaged in hydrogen bonding leading to a novel 3D supramolecular architecture. Complex (2) exists as a centrosymmetric tetranuclear unit, which are assembled into a 3D supramolecular architecture via extensively hydrogen bonding interaction. The luminescence experiments show that Pr(III) and Tb(III) compounds exhibit typical luminescence in the visible region. Besides luminescence, the magnetic properties of (1) and (2) were investigated and indicate the anti-ferromagnetic couplings between the Ln(III) ions. [Copyright &y& Elsevier]

Abstract: Three new transition metal–organic coordination polymers [Zn(bpp)(C4H4O4)]·1.2H2O 1, [Cd(bpp)2(H2O)2](C4O4)·8H2O 2 and [Cd(bpp)2(C4O4)]·H2O 3 have been synthesized from the reaction of d10 block metal, dicarboxylic acid with 1,3-bis(4-pyridyl)-propane (bpp). Structural analysis reveal that the Zn atoms in 1 are bridged by the succinate anions to generate helical chains, which are interlinked by bpp ligands to a 3D framework with Sra (42 ·63 ·8) topology. The CdN4O2 octahedras in 2 are bridged by a pair of bpp ligands to form 1D repeated rhomboid chains, which are assembled into 2D layer via the hydrogen bonds. The six-coordinated Cd2+ ions in 3 are bridged by the acetylenedicarboxylato ligand to form 1D zigzag chains, which are interconnected by bpp ligands to construct 3D metal–organic framework with a (48 ·67) topology. The fluorescent spectra of 1–3 indicate intraligand fluorescence emission upon irradiation. [Copyright &y& Elsevier]