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A weak voltage analog dimming method for high precision light emitting diode (LED) current control with N-Bits analog static offset calibration (N-Bits ASOC), dynamic offset cancellation (DOC) and K-times dimming duty to voltage (KD2V) conversion is presented. The N-Bits ASOC circuit decreases the analog dimming error to VOSMAX/2N - 1 by pre-calibrating the error amplifier offset. Moreover, through a smart combination of KD2V circuits and DOC amplifier, the KD2V and DOC operational amplifier magnify the dimming reference and LED current sense voltage K-times, respectively, which reduces the residual dimming error K-times without any modification to the LED current sampling resistor. Based on the 0.18μm 5V/40V Bipolar-CMOS-DMOS (BCD) process, experimental results for a cell phone backlighting driver show that the analog dimming ILED error reduces to 30μA at maximum 200mV LED current feedback voltage. This deviation mostly keeps constant through a dimming duty range of 0.5% to 100% and VIN range of 2.7V to 5.5V. Furthermore, a 200-sample measurement data suggests that this method is effective even when dimming duty is smaller than 0.5% for mass production.

A low specific on-resistance (Ron,sp) UMOS with high permittivity (HK) dielectric pillars underneath the p body region (HK UMOS) is proposed and investigated. Its drift region uniquely consists of two narrow and highly-doped n pillars and one lightly doped n- pillar, which is parallel to the HK dielectric pillars. First, the highly-doped n pillars offer low resistance current paths in the ON-state while the n- region sustains high voltage in the OFF-state. Second, the HK dielectric causes an enhanced self-adapted lateral assistant depletion of the n pillars, which allows to keep a higher doping concentration of the n pillars and thus further reduces the Ron,sp. Third, the HK dielectric enhances the vertical field strength in high-voltage blocking state, leading to an improved breakdown voltage (BV). Compared with a conventional UMOS at the highest figure-of-merit, the HK UMOS with kD=200 not only decreases the Ron,sp by 67%, but also increases the BV by 12%.

A luminescent compound, [Cd (HO-BDC) (bpe)1.5]n (1 HO-H2BDC= 5-hydroxyisophthalic acid, bpe=1,2-bis (4-pyridyl) ethane), was hydrothermally synthesized. It features a 5-connected two-dimensional (2D) double layer motif. Interestingly, this 2D double layer motif is further interlocked with the neighboring ones in the parallel fashion, giving rise to the final three-dimensional (3D) polycatenated network. Moreover, the title compound exhibits intense yellow photoluminescence at room temperature.

The reactions of Cu(II) sulfate with 4-Amino-1,2,4-triazole (Atrz) and 1,3,5-Benzenetricarboxylic acid (H3BTC) gave a novel interesting coordination polymer {[Cu5(BTC)4(HAtrz)2(H2O)9]}n. The structure contains 2D undulated molecular layers. The BTC side arms can thread through the voids of adjacent polymeric units guided by strong intermolecular hydrogen bonding interactions, exhibiting an unusual 2D → 3D polythreading with finite components.

A series of carboxylate-substituted trinudear molybdenum dus-ter compounds formulated as Mo3S4(DTP)3(RCO2)(L), where RffiH, CH3, C2H5, CH2Cl, CCl3, R^1C6H4(R^1 is the group on the benzene ring of aromatic carboxylate ), L=pyridine,CH3CN, DMF, have been synthesized by the ligand substitu-tion reaction. The dissociation of the loosely-coordinated ligand L from the cluster core was studied by ^31p NMR. The dissocia-tion process of L is related to the solvent, temperature, and acidity of carboxylate groups, so as to affect the solution struc-ture and reactive properties of the duster. The long-distance in-teraction between ligands RCO2 and L is transported by Mo3S4 core.

A systematic investigation on the Ag/bpy/(H)dpa family represents seven Ag(I) supramolecular compounds with distinct structural features, Ag2(bpy)0.5(dpa) (1), Ag2(bpy)1.5(dpa)(H2O) (2), Ag(bpy)0.5(Hdpa) (3), α-[Ag(bpy)]·(Hdpa) (4), β-[Ag(bpy)]·(Hdpa) (5), [Ag(bpy)]2·(dpa)·6(H2O) (6), and [Ag(bpy)]4·(dpa)·2(NO3)·6(H2O) (7) (H2dpa = 1,1′-biphenyl-2,2′-dicarboxylic acid, bpy = 4,4′-bipyridine). Of particular interest about this work is that supramolecular isomerism is observed between compounds 4 and 5. Single-crystal X-ray structural analysis reveals the structural diversity of the formed products. Compounds 1−5 are extended from various one-dimensional (1D) chain substructures. Three distinct 1D chains exist in 1−3: one 1D chain of {Ag2(dpa)} exists in compound 1, one supramolecular chain of tetranuclear {Ag2(dpa)(H2O)}2 subunits linked by Ag···Ag interactions (argentophilic interactions) and hydrogen bonding interactions is observed in 2, and one 1D alternate chain of eight-membered {Ag2(Hdpa)2} ring bri...

The present study describes the preparation and characterization of the first example of metal−organic frameworks (MOFs) with the coexistence of polycatenation and polythreading involving chemically and structurally different two-dimensional square grids [Cu(II)2(5-HIPA)2(4,4′-bipy)2(H2O)2]n (A, 5-HIPA = 5-hydroxyisophthalato) and irregular layers [Cu(II)3(5-HIPA)2(2-PyC)2(4,4′-bipy)2(H2O)4]n (B) in a unique three-dimensional framework [(A)(B)]·6.5nH2O (1) with the in situ generated pyridine-2-carboxylate (2-PyC) ligand.

Two new cadmium(II) coordination polymers, [Cd(pzdc)(H 2 O) 2 ] n ( 1 ) and [Cd(pzdc)(2,2′-bipy)] n · n H 2 O ( 2 ) (H 2 pzdc = pyrazine-2,3-dicarboxylic acid, 2,2′-bipy = 2,2′-bipyridine) have been prepared by assembly of Cd II with H 2 pzdc ligand. Both the two complexes consist of two-dimensional architecture with a 4.8 2 topology. Intermolecular hydrogen-bond interactions lead complex 1 to a 3D supramolecular architecture, while complex 2 are extended into a 3D supramolecular network via the face-to-face π–π stacking interactions. Both of them show strong greenish-blue photoluminescence at room temperature.

Two novel copper(II) complexes Cu(Hip)2(H2O)2 (1) (H2ip = isophthalic acid) and Cu3(ipO)2(H2O)3 (2) (H3ipO = 2-hydroxy isophthalic acid) have been synthesized through hydrothermal reaction of copper(II) chloride, isophthalic acid, melamine and sodium hydroxide under different pH conditions. The diverse poduct structures show that the pH value of the reaction plays a key role in the hydroxylation of isophthalic acid. The single-crystal X-ray diffraction studies reveal that complex 1 features a 3D supramolecular framework constructed by hydrogen bonds connecting neutral subunits Cu2(Hip)4(H2O)4; whereas complex 2 is based on hexametallic macrocylic building blocks, which are further extended into 2D network through hydrogen-bonding interactions.

A Cu(II)-catalyzed oxidative substitution of pyrazole-3,5-dicarboxylic acid (H3pdc) C–H bonds by bromo/iodo nucleophiles in a self-assembly process under hydrothermal conditions afforded the first halogenated pyrazolecarboxylato-based linear trinuclear copper(II) coordination complexes.

Hydrothermal reactions of copper(I) or copper(II) salts with guanazole (3,5-diamino-1,2,4-triazole = Hdatrz) have yielded three novel 3D Cu-guanazolate complexes, that is, [Cu7Br6][Cu(datrz)2] (1), [Cu(datrz)] (2), and [Cu4(datrz)2(OH)2(SO4)2] (3). Complex 1 presents the first example in Cu(I) halide complexes with its Cu(I) bromide units {Cu7Br6}nn+ adopting a 3D network, which is constructed from two unprecedented substructures: the edge-sharing eight-membered {Cu4Br4}n rings and the three-bladed paddle-wheel-like {Cu4Br4}n units. Guanazolate ligands in 1 adopt an unprecedented pentadentate bridging mode and some bromide ligands exhibit a rare umbrella-like μ4 coordination geometry. The first binary Cu(I) guanazolate 2 exhibits a seldom reported two-fold interpenetrated lvt-a net, which can be partially controlled through the fixing effect of inter-ligand hydrogen bonds. Cu(II) complex 3 comprises a rarely encountered 12-connected tetranuclear {Cu4(μ3-OH)2} SBU, which is bridged by guanazolate ligands a...

A new hybrid system of cadmium(II) polymers has been synthesized by using 1H-1,2,4-triazole-3-thiol (HtrzSH) and cadmium salts, affording six novel luminescent complexes, that is, [Cd(H2trzS)2Cl2] (1), [Cd(HtrzS)Br] (2), [Cd(HtrzS)I] (3), [Cd2(HtrzS)2(SO4)] (4), [Cd(H2trzS)(H2Edta)]·(H2O) (5), and [Cd(trzS)2] (6). In these materials, owing to the effective inducement of inorganic or organic anions, coordination versatility of the HtrzSH ligand manifests as many as six bridging modes (type A−F), and five of them (type B−F) are first reported. The structure of complex 1 is a one-dimensional chain constructed from the neutral monodentate and bidentate H2trzS ligand (type A−B), whereas two-dimensional complexes 2−3 and the three-dimensional complex 4 possess the deprotonated tridentate to quadridentate HtrzS ligands (type C−E). Zero-dimensional complex 5 and peristyle-like three-dimensional complex 6 are synthesized by means of organic anions, and in the latter complex a bideprotonated quadridentate trzS liga...

The hydrothermal assembly of Co(OAc)2 · 4H2O with isophthalatic acid (H2ip) and melamine (ma) yielded a novel 3D coordination polymeric complex, {[Co3(ma)(ip)3] · 2H2O}n (1), which presents an unusual non-interpenetrated pseudo-primitive cubic (pcu) topology constructed from a 6-connected trinuclear Co(II) SBU. The study of magnetic properties indicates that antiferromagnetic coupling interactions exist both between the adjacent Co(II) sites and between the adjacent trimers. So the melamine molecule participates in transferring magnetic interactions for the first time.

A new zinc compound, [Zn3(DPA)2(BDC)]n (1, H2DPA = diphenic acid and H2BDC = benzene-1,4-dicarboxylic acid), has been hydrothermally prepared and characterized. It illustrates an unusual three-dimensional architecture containing two organic aromatic bicarboxylate ligands with distinct configurations. Moreover, this polymer exhibits strong photoluminescence at room temperature, and the main emission band is at about 390 nm with λex = 337 nm in the solid state at room temperature.

Although the 2.2'-biphenyldicarboxylate ligand (2,2'-dpa) has been widely used to construct metal-organic frameworks (MOFs) with helical sub-structure. the effect of the helical arrangement of spin carriers on the magnetic properties remains rarely scarce. In this article, two unique magnetic metal-organic supramolecular frameworks with different structural features,[Cu-2(dpa)(2)(H2O)2(4,4'-dpdo)0.5](n)(1) and [Ni(H2O)4(dpa)] center dot (4,4'-dpdo)(H2O) (2) (dpdo = 4,4'-dipyridine-N,N'-dioxide), have been isolated from the direct reaction of H(2)dpa with their corresponding salts in the presence of dpdo. In complex 1, the Cu-dpa double-helical chains, which are bridged by long flexible mu(2)-dpdo ligands to give rise to a regular 6 3 covalent layer, exhibit strong antiferromagnetic coupling interactions. Whereas the 1D [Ni(dpa)(n) helical chains in complex 2 exhibit weak antiferromagnetic coupling interactions. Rich hydrogen bonds between perpendicular 1D (Ni(dpa)](n) helical chains and quasi-1D (dpdo)(n) chains result in an intricate 3D supramolecular network. (c) 2007 Elsevier B.V. All rights reserved.

Two d(10) complexes, [Zn(IN)(Nta)](n) (1) and [Cd(IN)(Nta)](n) (2) (H-IN = isonicotinic acid, H-Nta = nicotinic acid), have been hydrothermally synthesized and characterized. X-ray diffraction analysis results reveal their structures are isostructural. Both of them consist of two-dimensional (2D) twofold parallely interpenetrated polymers and exhibit the same blue fluorescent emission at 434 nm (for 1, lambda(ex) = 326 nm; for 2, lambda(ex) = 322 nm). (c) 2006 Elsevier B.V. All rights reserved.

The hydrothermal reaction of CdBr(2)(.)2H(2)O with a flexible multicarboxylate ligand, trans-aconitic acid (H(3)L), produced a novel coordination compound [Cd(3)L(2)(H(2)O)(6)](n). It crystallizes in the space group C2/c with a 17.1304(1) angstrom, b = 9.5611(2) angstrom, c = 14.0137(2) angstrom, beta = 115.96 degrees, Z = 4, V = 2063.65(5) angstrom(3). The unique feature of the structure is an unprecedented 3D framework containing infinite Cd(1)-O-C linear chains and heterochiral Cd(2)-O-C single-stranded helices. These linear chains and helices happen to be perpendicular to each other. (c) 2006 Elsevier B.V. All rights reserved.

A copper(I) complex, NH4[Cu(H2CAC)2] (1) (H3CAC = cyanuric acid) has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction , IR spectroscopic, and thermogravimetric analyses. Complex 1 features an 3D framework incorporating 2D polyanionic brick-wall like plane which are held together by NH4+ cations through hydrogen-bonding interactions. Complex 1 crystallizes in the orthorhombic space group Fddd with the cell parameters a = 36.729(2), b = 12.5829(8), c = 9.3590(7) A, V = 4325.3(5) A3, Z = 16.

Two stable supramolecular microporous cobalt(II) polymers, namely [Co(HAIP)2]n.3nH2O (1) and [Co(AIP)(H2O)]n (2), AIP = 5-aminoisophthalate, were hydrothermally synthesized and characterized by single-crystal X-ray diffraction, IR spectra, thermogravimetric analyses, and variable-temperature magnetic susceptibility measurements. The two complexes are constructed from the same Co2(CO2)2 SBU, which is extended into a 1D chain in 1 and a 2D layer in 2. As a result, 1 and 2 are 2D and 3D coordination polymers, respectively. The 3D supramolecular network of complex 1 is held up by strong hydrogen bonds formed between carboxylate groups and shows very high stability when the free H2O molecules are removed, indicating an extraordinarily stable H-bonding system. Upon water ligands being liberated, complex 2 becomes a stable microporous solid with coordination-unsaturated Co centers. The behavior of the susceptibility curve of 1 suggests the occurrence of an interesting intrachain antiferromagnetic coupling between the Co(II) ions and the presence of a significant orbital contribution, whereas the features of 2 indicate an antiferromagnetic coupling with T(N) = 3.5 K and a long-range antiferromagnetic order with a field-induced magnetic transition.

Two hydrothermally synthesised 3D metal-coordination polymers, namely [Cu(isonicotinate)(nicotinate)]n (1), with an 8-connected CsCl topology, and [Cu2(μ3-OH)(isonicotinate)2(BDC)0.5]n (2), with an unusual 8-connected 35.411.58.64 topology, demonstrate that highly connected SBUs can be employed in the construction of complicated frameworks. The temperature-dependent magnetic susceptibilities for the two complexes were also determined. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

Four MII quinolinato complexes, [Zn2(quin)2(H2O)3]n (1), [Zn(quin)(H2O)2]n (2), [Zn(quin)(H2O)]n (3) and [Cd(quin)]n (4) (H2quin = 2,3-pyridinedicarboxylic acid or quinolinic acid), have been hydrothermally synthesized and structurally characterized. X-ray diffraction analyses reveal that all of these four complexes are constructed from similar rod-like SBUs, [M(quin)]n (M = Zn or Cd). Complexes 1 and 2 have similar 1-D box-like chains but different packing structures; complex 3 has a 2-D grid-like network and complex 4 has an unusual 2-D bilayer structure. Due to the different structural features, these complexes exhibit different photoluminescent emissions: complex 1 at 439 nm (λex = 345 nm), complex 2 at 428 nm (λex = 360 nm), complex 3 at 508 nm (λex = 304 nm) and complex 4 at 500 nm (λex = 324 nm).

Three new Copper(II) polymers coordinated by both rigid and flexible ligands, [Cu(bpy)(C5H6O4)]n (1), [Cu(bpy)(C6H8O4)]n (2), and [Cu2(bpy)2(C6H8O4)2]n (3) (bpy = 4,4′-bipyridine), have been hydrothermally synthesized and structurally characterized. Complex 1 features a box-like bilayer motif of (4, 4) net. It crystallizes in triclinic space group with cell parameters: a = 8.1395(6) A, b = 9.43 12(8) A, c = 10.5473(8) A, α = 112.1830(1)°, β = 92.423(2)°, γ = 104.752(2)°, V = 716.31(1) A3, Z = 2. Complex 2 crystallizes in triclinic space group with a = 8.8652(4) A, b = 8.9429(4) A, c = 10.6390(4) A, α = 89.520(2)°, β = 69.123(2)°, γ = 75.2440(1)°, V = 758.92(6) A3, Z = 2. Complex 3 crystallizes in monoclinic space group Cc with a = 11.1521(1) A, b = 15.3961(1) A, c = 17.7419(1) A, β = 105.715(3)°, V = 2932.4(5) A3, Z = 4. Complexes 2 and 3 are isomeric with different coordination modes of adipato ligand. Both of them possess the two-fold interpenetrated 3-D pcu topological net.

A new Zn(II) complex, [Zn(pyz)(H 2 O) 4 ] pht ( 1 ) (pyz=pyrazine; pht=1,2-benzenedicarboxylate) has been hydrothermally synthesized and characterized. Complex 1 features a novel polar 3D framework with a 1D polycationic chain [ Zn ( pyz ) ( H 2 O ) 4 ] n 2 n + , between which pht 2− dianions are encapsulated via the supramolecular interaction. Its powder SHG is of about three times as large as that of KH 2 PO 4 .

Three new copper complexes, [CuIICuI(ip)(ipH)(4,4′-bipy)3/2]n (1), [Cu(ip)(4,4′-bipy)]n · 3nH2O (2), and [Cu(ipH)2(4,4′-bipy)]n (3), have been hydrothermally synthesized by the reaction of Cu(NO3)2 · 3H2O with isophthalic acid (ipH2) and 4,4′-bipyridine (4,4′-bipy) under different reaction conditions. Complex 1, a mixed-valence copper(I,II) complex, exhibits a 2-D interpenetrating grid framework, in which five-coordinated CuII and three-coordinated CuI environments are established. The oxidation states of center Cu atoms have been confirmed by X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance spectra (EPR). Complex 2 features a 2-D box-like bilayer architecture, in which CuII atoms are linked by ip ligands to form a 1-D double-chain and the resulting chains are further strutted by the 4,4′-bipy ligands. In complex 3, two bridging 4,4′-bipy ligands and two terminal ipH ligands confine the CuII center in a square plane coordination geometry. The whole molecule of 3 was arranged into a 1-D linear chain structure. Additionally, the thermogravimetric analyses (TGA) for complexes 1–3 are also discussed in this paper.

The substitution reaction of [Mo3S4(dtp)3(ClCH2COO)(py)] (dtp = diethyl dithiophosphate) or [Mo3S4(dtp)4(H2O)] with adipic acid or glutaric acid in N,N′-dimethylformamide (dmf) or dimethyl sulfoxid...

Two novel Cd(II)-citrate complexes were obtained with different metal/ligand ratios through hydrothermal method. Their structures were determined by single-crystal X-ray diffraction analysis. Although their topological structures are both 2-D layer network assemblies, both central Cd(II) ions and Hcit3− ligands display completely different coordination modes. In polymeric complex 1, Hcit3− serves as a μ10-bridged and central Cd(II) ions adopt 6- and 8-coordinated configurations. In contrast, a μ9-bridged and 6- and 7-coordinated environments between Cd(II) and Hcit3− are established in the polymeric complex 2. Two Complexes remain stable up to approximately 300 °C. The complex 1 exhibits strong fluorescent emission band at 450 nm (λ=346 nm) as well as complex 2 exhibits strong fluorescent emission band at 430 (λ=346 nm).

Two new metal succinates modified by rigid bipyridines, Cd(4, 4′-bpy)(C4H4O4)·1/4H2O (1) and Cu(2, 2′-bpy)(C4H4O4)0.5(NO3)(H2O) (2) (bpy = bipyridine), have been synthesized by hydrothermal reactions and structurally determined. Complex 1 crystallizes in the orthorhombic space group Cmca with the cell parameters a = 11.696(2), b = 15.554(2), c = 15.874(3) A, α = β = γ = 90.00°, V = 2888(3) A3, Z = 8. Complex 2 crystallizes in the triclinic space group with a = 7.077(1), b = 9.838(2), c = 10.461(2) A, α = 71.941(3)°, β = 73.078(3)°, γ = 74.502(3)°, V = 649.8(2) A3, Z = 2. In complex 1, a 2-D network was formed by Cd-succinato bonding. The 2-D networks are pillared by 4, 4′-bpy ligands, forming a 3-D grid framework. The 2-fold interpenetration of the resulting 3-D frameworks completes the molecular structure. In complex 2, the CuII atom adopts a distorted octahedral in which the CuII atoms are bridged by two H2O molecules into an infinite zigzag chain, [Cu2(H2O)2(C4H4O4)]n. The neighboring chains are further linked by π-π stacking interactions into a 2-D network, and the interlayer hydrogen bonds lead to the final 3-D crystal structure. Synthesen und Kristallstrukturen von zwei, mit Bipyridin modifizierten Metallsuccinaten Zwei neue, mit Bipyridin modifizierte Metallsuccinate Cd(4, 4′-bpy)(C4H4O4)·1/4H2O (1) und Cu(2, 2′-bpy)(C4H4O4)0.5(NO3)(H2O) (2) (bpy = bipyridine), wurden durch hydrothermale Reaktionen synthetisiert und strukturell untersucht. 1 kristallisiert orthorhombisch, Raumgruppe Cmca mit den Parametern a = 11.696(2), b = 15.554(2), c = 15.874(3) A, V = 2888(3) A3, Z = 8. 2 kristallisiert triklin, Raumgruppe mit a = 7.077(1), b = 9.838(2), c = 10.461(2) A, α = 71.941(3)°, β = 73.078(3)°, γ = 74.502(3)°, V = 649.8(2) A3, Z = 2. Im Komplex 1 wird durch die Cd-Succinat-Bindung ein zweidimensionales Gitter gebildet. Diese Gitter werden saulenartig von 4, 4′-bpy-Liganden zu einem dreidimensionalen Gitter verbunden. Im Komplex 2 hat das CuII-Atom verzerrt-oktaedrische Koordination. Die CuII-Atoms werden von zwei H2O-Molekulen zu einer unendlichen Zickzack-Kette, [Cu2(H2O)2(C4H4O4)]n, verbruckt. Benachbarte Ketten werden ferner durch π-π-Wechselwirkungen zu einem zweidimensionalen Gitter verbunden und Wasserstoffbruckenbindungen zwischen den Schichten ergeben eine dreidimensionale Struktur.

Three novel BPTC complexes, (H(2)BPTC)(4,4'-H(2)bpy)H(2)O (1), [Cd(2)Cu(HBPTC)(2)(mu(2)-4,4'-bpy)(2)(4,4'-bpy)(2)(H(2)O)(2)](n) (2), and [Co(3)(HBPTC)(2)(mu(2)-4,4'-bpy)(3)(H(2)O)(4)](n).2nH(2)O (3) (BPTC = 3,3',4,4'-benzophenone-tetracarboxylate and bpy = bipyridine), were hydrothermally synthesized. Complex 1, which is obtained as a coproduct during the syntheses of complexes 2 and 3, features a 2-D layered strong hydrogen bonding network with 2-fold interpenetration. Complex 2 has an unusual 2-D double-layered motif, which is linked together by Cu atoms in a face-to-face manner. It exhibits nanosized channels filled by 4,4'-bpy ligands. Three six-coordinated Co atoms in 3 are interlinked by HBPTC ligands to form a 2-D grid structure, which is further sustained by rigid 4,4'-bpy ligands into a 3-D open framework similar to CdSO(4) with the BPTC moieties situated in the tunnels. The thermal stabilities of complexes 1-3 were examined. The photoluminescence properties of complexes 1-2 and temperature-dependent magnetic susceptibility for 3 were also studied.

A new mixed-valence copper(I,II) coordination complex with [Cu2O8] paddle-wheel dicopper units, [CuIICuI(ip)(ipH)(4,4′- bipy)3/2]n(ipH2 = isophthalatic acid; 4,4′-bipy = 4,4′-bipyridine) (1), has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, IR, XPS, EPR and TGA. It exhibits a 2-D interpenetrating grid framework, in which five-coordinated CuII and three-coordinated CuI environments are established.

Three Ag(I) coordination polymers with flexible long-chain multi-nitrile ligands, [Ag(TDPN)(NO3)]n (1), [Ag(TDPN)(ClO4)]n (2) (TDPN = β,β′- thiodipropionitrile), [Ag2(TCEB)(NO3)2]n (3) (TCEB = 1, 2, 3, 4-tetrakis (2-cyanoethoxy)butane) have been synthesized and structurally characterized by IR spectra and X-ray crystallography. In particular, TCEB is a meso compound. Single-crystal X-ray analysis shows that it contains two chiral carbon atoms with R- and S-configurations. The structures of 1, 2 and 3 consist of a 1-D ladder-like chain, a 2-D boxlike network and a 3-D framework of CdSO4 topology, respectively. IR spectra of the free and coordinated CN groups, the correlation between the counter anions and the topological structures, and the photoluminescent properties of complexes 1–3 are also discussed.

Two novel Ag(I) complexes, [Ag(PES)(H2O)]n (1) and [Ag(PES)(melamine)] (2), (PES=2-(4-pyridyl)ethanesulfonate), have been synthesized and structurally characterized. Complex 1 shows a novel 2D layer structure and complex 2 shows a zigzag 1D chain via the weak Ag⋯O interactions.

Two new trinuclear molybdenum clusters Mo3S4(dtp)3(p-NO2C6H4COO)(L) (dtp=diethyldithiophosphate, L=Py and DMF) have been synthesized by the ligand substitution reaction with p-nitrobenzoic acid using the precursors Mo3S4(dtp)4(H2O) and Mo3S4(dtp)3(CCl3COO)(Py), respectively. Their structures have been determined by X-ray diffraction analysis and confirmed by 31P NMR spectra. Both compounds contain [Mo3S4] cores in which three Mo atoms form an isosceles triangle and each Mo atom is octahedrally coordinated. High asymmetry of coordination on the different Mo atoms is observed. The ligand replacement of –dtp by the aromatic acid makes the whole molecule more stable in a dipolar solvent. The coordination difference between Py and DMF also affects the core structure, resulting in the corresponding Mo–Mo distances being different in these two similar cluster compounds.