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Five novel mononuclear [Cu(Bphen)(bdppmapy)]X complexes showing photoluminescence were synthesized. The same diphosphine ligand and diimine ligand and different Cu(I) salts were used in the one-pot synthesis of complexes 1–5. These complexes are listed as follows: [Cu(Bphen)(bdppmapy)]CF3SO3 (1), [Cu(Bphen)(bdppmapy)]BF4·0.268CH3OH (2), [Cu(Bphen)(bdppmapy)]ClO4 (3), [Cu(Bphen)(bdppmapy)]I·CH3OH (4) and [Cu(Bphen)(bdppmapy)]Br·2CH3OH (5) (Bphen = 4,7-diphenyl-1,10-phenanthroline, bdppmapy = N,N-bis((diphenylphosphino)methyl)-2-pyridinamine). IR, NMR, elemental analysis, single-crystal X-ray diffraction analysis, UV-vis, fluorescence spectroscopy and terahertz time-domain absorption spectroscopy (THz-TDS) were used to characterize 1–5. Their crystal structures have been elucidated by X-ray crystallography and their photophysical properties have been investigated in detail. These five complexes have a similar coordination center, while their space stacked structures are different, from a 0D dimeric structure to a 3D supramolecular structure. Photophysical studies and density functional theory calculations (DFT) show that the luminescence properties of these five complexes are mainly ascribed to metal-to-ligand charge transfer (MLCT). Among these five complexes, 1 emits luminescence with the highest quantum yield of 36.96% and a lifetime of 11.90 μs at ambient temperature. Different counter-anions lead to the distinction of QYs, maybe due to the influence of weak forces. Terahertz time-domain absorption spectroscopy was used to characterize these ligands and complexes in the range of 0.2–2.4 THz. [ABSTRACT FROM AUTHOR]

Reaction of tetraphosphine (P4) ligand dppbpda with Ag(I) oxylates yielded new coordination polymers (CPs) of formula [(dppbpda)Ag4(Ox)4]n (Ox=Bz (1), Sal (2), LA (3), Bz=benzoate, Sal=salicylate, LA=lactate). The solid‐state structures of 1–3 consist of one dimensional (1D) chains constructed from tetranuclear μ‐η2,η2‐ connected Ag4(Ox)4 cluster cores and dppbpda bridging ligands. Compounds 1–3 absorbed Congo Red in two distinct steps, with maximum uptake quantities of 1438 (1), 1417 (2) and 1656 (3) mg/g, inversely correlating with the size of the anions in the CPs. These CPs had band gaps in the semiconducting region (Eg) 3.05–3.15 eV and all three showed enhanced two‐peak photocurrent responses during the stepwise adsorption of CR, with maximum photocurrent densities of 227 (1), 163 (2) and 386 (3) μA cm−2 for composites with optimized dye coverage. [ABSTRACT FROM AUTHOR]

Tetraphosphine ligand dpppda reacts with AgNO3 to generate two 1D coordination polymers containing cubic and chair-like [Ag4(NO3)4] clusters. ESR spectroscopy supported by DFT calculations indicated the presence of dpppdaṖ+, a Wurster's blue – like radical cation formed by intramolecular ligand-to-metal charge transfer (LMCT). This LMCT results in higher AgI→ Ag0 potentials and good photocurrent responses. [ABSTRACT FROM AUTHOR]

Coordination compounds have been used as efficient photocatalysts for the degradation of pollutive organic dyes due to their semiconductive nature and diverse structures that may be adjusted by the central metals and ligands. Herein we prepared N′,N′‐2,2‐tetrakis(diphenylphosphanylmethyl)thiocarbohydrazide (tpptch) and utilized it to react with AgX (X = Br, I, CN) in different solvent systems. These reactions afforded two dicationic tetranuclear complexes {[Ag4X2(tpptch)2]X2 (1: X = Br; 2: X = I)}, one 1D coordination polymer [Ag2I2(tpptch)]n (3) and one neutral tetranuclear complex [Ag4(CN)2(dptpptch)2] (4, dptpptch is the anion of deprotonated tpptch after an enolization). In 1–4, the S atom of the C=S group binds at one AgI atom in 1 or 2, or remains uncoordinated in 3, or connects with two AgI atoms after transforming into the C–S– end in 4. The catalytic activities of these compounds toward the photodegradation of nine organic dyes under UV irradiation were examined, among which 3 showed the best performance. Their anodic photocurrent responses and HOMO–LUMO energy gaps derived from density functional theory (DFT) calculations correlated well with the photocatalytic activities. The different bindings of the S end of tpptch and dptpptch ligands with AgI centers in 2–4 may be contributed to the discrepancy in their catalytic activities. The results provide a ready route to design and prepare highly stable and efficient photocatalysts for treating dye‐polluted water. Several AgI‐P‐S complexes were assembled. They exhibited high photocurrent responses and excellent photochemical performance in degrading organic dyes in water. [ABSTRACT FROM AUTHOR]

Reactions of Cd(NO3)2·4H2O with 1,2,4,5-tetrakis(4-pyridylvinyl)benzene (4-tkpvb) and 5-tert-butylisophthalic acid (5-tert-H2BIPA), 1,3,5-benzenetricarboxylic acid (1,3,5-H3BTC) or 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) under solvothermal conditions afforded three two-dimensional (2D) Cd(ii) coordination polymers [Cd(4-tkpvb)(5-tert-BIPA)]n (1), [{Cd(4-tkpvb)(1,3,5-HBTC)}·0.5DMF]n (2) and [Cd(4-tkpvb)(1,4-NDC)]n (3). Compounds 1–3 were structurally characterized by IR, elemental analysis, powder X-ray diffraction, and single crystal X-ray diffraction. Compounds 1–3 possess unique 2D networks in which 1D double chains [Cd2L2]n (L = 5-tert-BIPA or 1,3,5-HBTC) (1–2) or 1D linear chains [Cd(1,4-NDC)]n (3) are linked by 4-tkpvb ligands. Upon UV light excitation, a 4-tkpvb solution in DMF showed an emission band centered at 446 nm with a shoulder at 475 nm. The addition of Hg2+ ions into the 4-tkpvb solution in DMF remarkably changed its colour from colourless to yellow under natural light, or from blue to grey yellow under UV light, which were clearly visible to the naked eye. Compounds 1–3 suspended in water could emit yellow-green light under UV light irradiation. The representative compound 1 was confirmed to be an uncommon multi-responsive luminescent sensor for Hg2+, CrO42− and Cr2O72− ions in water by the luminescence quenching method. The detection limits for these species were 0.15 μM (Hg2+), 0.08 μM (CrO42−) and 0.12 μM (Cr2O72−), respectively. The luminescence quenching mechanism studies revealed that these quenching processes were involved in either the interaction of Hg2+ with free pyridyl groups in 1 or the overlap between the absorption band of CrO42− or Cr2O72− and the excitation and/or emission bands of 1. [ABSTRACT FROM AUTHOR]

Instant adsorption of Congo Red (CR) by a 1D coordination polymer, [(H2L)0.5][Zn(1,2,3-BTA)(H2O)]·2H2O (1·2H2O), leads to the formation of a unique dye composite 1·0.75CR·6H2O, which demonstrates a remarkably enhanced photocurrent response compared to that of its precursor. [ABSTRACT FROM AUTHOR]

Solvothermal reactions of CdCl2-2.5H20 with 4,4'-bis(benzoimidazol-l-yl)bibenzene (bimbb) and 1,4-benzenedicarboxylic acid (l,4-H2bdc), 4,4'-biphenyIdicarboxylic acid (4,4'-H2bpdb), 5-methyl- 1,3-benzenedicarboxylic acid (5-Me-l,3-H2bdc), or 1,3,5-benzenetricarboxylic acid (H3btc) afforded four 3-D metal-organic frameworks, {[Cd2(l,4-bdc)2(bimbb)2]H20}n (1), {[Cd2(4,4'-bpdb)2(bimbb)(H20)2]}„ (2), [Cd2(5-Me-l,3-bdc)2(bimbb)]n (3), and {[Cd3(btc)2(bimbb)(H20)2]-2H20}n (4). Complexes 1-4 were characterized by elemental analysis, IR spectroscopy, powder X-ray powder diffraction, and single-crystal X-ray diffraction. 1 possesses a 3-D framework with 2-D undulated (8,4) layers which are further connected by bimbb pillars. 2 forms a 3-D pillared-layer framework constructed through 2-D undulated (4,4) layers and bimbb pillars. 3 has 1 -D ribbons of [Cd4(5-Mel, 3-bdc)4]n which are linked by bimbb to form a 3-D structure. 4 exhibits a 3-D pillared-bilayer framework consisting of (6,3) double-decker [Cd9(btc)6(u-OH2)6]„ layers and bimbb pillars. The Schlȁfli symbols for the four frameworks are (4²-6³-8)(4²-65-8³) (1), (44-66) (2), (44-6²)(46-64) (3), and (6³)(610) (4). The photoluminescent properties of 1-4 were also investigated. [ABSTRACT FROM AUTHOR]

Solvothermal reactions of Cu2(OH)2CO3 with 1,3-bis(pyridin-4-yl)propane (bpp) in the presence of aqueous ammonia in 4-iodotoluene/CH3CN or 1,4-diiodobenzene/CH3CN afforded two [Cu2I2]-based coordination polymers, namely catena-poly[[[di-μ-iodido-dicopper(I)]-bis[μ-1,3-bis(pyridin-4-yl)propane-κ2 N: N′]] p-toluidine tetrasolvate], {[Cu2I2(C13H14N2)2]·4C7H9N} n, (I), and the analogous 1,4-diiodobenzene monosolvate, {[Cu2I2(C13H14N2)2]·C6H4I2} n, (II). The [Cu2I2] unit of (I) lies on a centre of symmetry at the mid-point of the two I atoms, while that of (II) has a twofold axis running through the I...I line. In (I) and (II), each Cu centre is tetrahedrally coordinated by two μ-I and two N atoms from two different bpp ligands. Each rhomboid [Cu2I2] unit can be considered as a four-connecting node linked to the symmetry-related [Cu2I2] units via two pairs of bpp ligands to form a one-dimensional double chain along the c axis. The dimensions of the [Cu2I2(bpp)2]2 rings in (I) and (II) are different, which may be due to the presence of different guest solvent molecules in the structures. In (I), one p-toluidine molecule, derived from an Ullmann coupling reaction of 4-iodotoluene with ammonia, interacts with the [Cu2I2] cluster fragment through N-H...I hydrogen bonds, while the two p-toluidine molecules interact via N-H...N hydrogen bonds. In (II), two I atoms of each 1,4-diiodobenzene molecule are linked to the I atoms of the [Cu2I2] fragments from a neighbouring chain via I...I secondary interactions. [ABSTRACT FROM AUTHOR]

Solvothermal reactions of CuI with four flexible N-heterocyclic ligands, 1,2-bis(4-pyridyl)ethane (bpe), 1,1′-(1,4-butanediyl)bis-1H-benzimidazole (bbbm), 1,1′-(1,4-butanediyl)bis-1H-benzotriazole (bbbt), and 1,1′-(1,5-pentanediyl)bis-1H-benzimidazole (pbbm), afforded four new [CunIn]-based coordination polymers, [Cu3I(μ-I)(μ3-I)(bpe)3]n(1), {[CuI(bbbm)1.5]·0.25MeCN}n(2), and [Cu4(μ3-I)4L2]n(3: L = bbbt; 4: L = pbbm), respectively. Compounds 1–4were characterized by elemental analysis, IR and X-ray crystallography. 1consists of an unique 2D network in which 1D [CuI(bpe)]nzigzag chains are embroidered alternatively onto the two faces of a 2D [Cu4(μ-I)2(μ3-I)2(bpe)2]nlayer through pairs of bpe bridges. 2contains a 66-membered metallomacrocyclic [CuI(bbbm)1.5]6unit that fuses with its neighbouring ones viasharing Cu atoms to form a 2D (6,3) layer network. 3or 4contains a cubanelike [Cu4(μ3-I)4] core, which works as a cross-shaped four-connecting node to link its four equivalent units to form a 2D (4,4) cross-shaped network (3) or acts as a Y-shaped three-connecting node to connect its three equivalent ones to form a 1D double chain (4). In addition, the photoluminescent properties of 1–4in solid state at ambient temperature were also investigated. [ABSTRACT FROM AUTHOR]

Abstract: Diffusion reactions of CuI with N,N,N′,N′-tetra(diphenylphosphanylmethyl)ethylene diamine) (dppeda) and 1,4-N,N,N′,N′-tetra(diphenylphosphanylmethyl)benzene diamine (dpppda) in MeCN/toluene in a zigzag glass tube or solvothermal reactions of CuI and dppeda or dpppda in MeCN produced two [Cu x I x ]-based coordination polymers, [Cu2I2(dppeda)]·2MeCN (1·2MeCN) and [Cu4I4(dpppda)]·MeCN (2·MeCN), respectively. Both compounds were characterized by elemental analysis, IR spectroscopy, 1H and 31P{1H} NMR, ESI-MS and thermogravimetric analysis, and their structures were determined by single crystal X-ray diffraction. In 1, [Cu2I2] cores are interconnected by dppeda ligands in a μ-η 2:η 2 end-to-end mode to form a 1D chain, while in 2 stair-like [Cu4I4] cores are linked by dpppda ligands in a unique Z-shaped μ-η 2:η 2 side-by-side mode to produce the other kind of 1D chain. [Copyright &y& Elsevier]

Abstract: A novel lead(II) coordination polymer [Pb(4-cca)] n (1) was prepared by the hydrothermal reaction of Pb(NO3)2 with 4-carboxycinnamic acid (4-H2cca) and structurally characterized. Single-crystal X-ray diffraction revealed that 1 has a 3D supramolecular architecture constructed by 2D [Pb(COO)2] n layers pillared by –Ph–CH; spacers. The thermal and luminescent properties of 1 in the solid state were also investigated. [Copyright &y& Elsevier]

Abstract: Reactions of 25,26,27,28-tetrahydroxy-calix[4]arene (1) with 4 equiv. of m-carboxybenzenediazonium chloride in the presence of NaOAc∙3H2O in DMF produced a new azo calix[4]arene [H4L] (2) (H4L=5,11,17,23-tetrakis[(m-carboxyphenyl)azo]-25,26,27,28-tetrahydroxycalix[4]arene) in 96% yield. Hydrothermal reactions of Cd(NO3)2·4H2O with H4L at 90°C under pH=5.0–6.0 gave rise to a coordination polymer {[H3O]2[Cd7L4(DMF)4(EtOH)2(H2O)2]·5DMF·11.5EtOH·H2O}n (3). Compound 3 was characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. Compound 3 consists of a 3D framework with an unprecedented (3346526371)(364135861) topology. The thermal properties of 2 and 3 were also investigated. [Copyright &y& Elsevier]

Two new acetohydrazide zinc porphyrin with different donor units based Mn (Ⅱ) ion coordination polymers ( CPsx , x = 1,2 ) have been designed, synthesized, and well-characterized. Two coordination polymers and anchor porphyrin ( ZnPA ) self-assembly by metal-ligand axial coordination to modify the nano-structured TiO 2 electrode surface has been investigated in photoelectrochemical device. Our results reveal that the self-assemblies devices show significantly improved photocurrent conversion efficiency. Particularly, CPs1 based solar cell showed higher short circuit current density and conversion efficiency. Their optical performance, electrochemical impedance spectroscopy and transient photovoltage decay were also investigated to further understand the photoelectrochemical results. In addition, the assembled modes of the assemblies immobilized on TiO 2 electrode surfaces were also verified by transmission electron microscopy (TEM), theory calculations and energy dispersive X-ray spectroscopy (EDX). [ABSTRACT FROM AUTHOR]

Reaction of AgNO 3 with one tetraphosphine ligand, 1,4- N , N , N ′, N ′-tetra(diphenylphosphanylmethyl) benzene diamine (dpppda), gave rise to a Ag(I)/tetraphosphine coordination polymer [Ag 4 (NO 3 ) 4 (dpppda)] n ( 1 ). Compound 1 has a one-dimensional (1D) chain structure in which the chair-like [Ag 4 (NO 3 ) 4 ] cores are linked by the dpppda ligands using a Z-shaped μ - η 2 : η 2 side-by-side mode. Compound 1 exhibited good catalytic activity towards the photodegradation of nitrobenzene (NB), paranitrophenol (PNP) and 2,4-dinitrophenol (2,4-DNP) in aqueous solution under UV light irradiation. The kinetics and the mechanism of such catalytic photodegradation reactions were also investigated. The present work provided some new insight into the design and preparation of new coordination polymers as catalyst for high-performance photodegradation of toxic and persistent organic species existed in industrial wastewaters. [ABSTRACT FROM AUTHOR]

Abstract: Three [Cu n X n ]-based (X=Br, I) coordination polymers, {[Cu2(μ-I)2(bimb)2]·iodobenzene} n (1), {[Cu4(μ3-I)4(bimb)2][Cu2(μ-I)2(bimb)]} n (2) and {[Cu2Br(bimb)2]Br} n (3) were prepared from solvothermal reactions of CuX (X=I, Br) with 1,4-bis(imidazol-1-yl)butane (bimb) at different temperatures. These compounds were characterized by elemental analysis, IR, and single crystal X-ray diffraction. Compound 1 contains a rhombic [Cu2(μ-I)2] dimer that acts as a planar four-connected node to link four equivalent ones via bimb bridges to form a 2D (4,4) network. Each layer is further stacked by π–π interactions to form a 3D structure with 1D rhombic channels occupied by the guest iodobenzene molecules. Compound 2 consists of [Cu2(μ-I)2] dimers and [Cu4(μ3-I)4] tetramers which are interconnected by bimb bridges to generate another 2D network. Compound 3 contains [Cu2Br(bimb)2]+ cations that are linked by bimb ligands to form a 1D cationic chain. We also investigated the solid state photoluminescent properties of 1–3 at ambient temperature. The results provide an interesting insight into how reaction temperatures exert a great effect on the assembly of [CunXn]-based coordination polymers. [Copyright &y& Elsevier]

Solvothermalreactions of Zn(NO3)2with tetrakis(4-pyridyl)cyclobutane(tpcb) and 1,4-naphthalenedicarboxylic acid (1,4-H2ndc)and 2,3-naphthalenedicarboxylic acid (2,3-H2ndc) in differentsolvents led to the formation of three polydimensional coordinationpolymers {[Zn2(H2O)(1,4-ndc)2(tpcb)]}n(1), {[Zn(1,4-ndc)(tpcb)0.5]}n(2), and {[Zn2(H2O)(2,3-ndc)2(tpcb)]}n(3). Compounds 1–3were characterized by elemental analysis, IR, powder X-raydiffraction (PXRD), and single crystal X-ray diffraction. Compound 1is a three-dimensional (3D) (3,3)-connected net with a (10·122)·(102·12) Schläfli symbol. Compound 2holds a 2-fold interpenetrating 3D framework with a (42·62·72)·(4·62·73) Schläfli symbol, which shows hexagonal-prism-likeone-dimensional channels. Compound 3shows a two-dimensional(3,8)-connected network. The solid state luminescent, optical, andthermal stability properties of 1–3at ambient temperature were also investigated. A comparative studyon their photocatalytic activity toward the degradation of methylorange and methyl blue in polluted water was explored. The resultsprovided some interesting insights into solvent effects on the structuresof zinc(II) coordination polymers and their photocatalytic applications. [ABSTRACT FROM AUTHOR]

Highlights: [•] A novel assembly with acetohydrazide porphyrin coordination polymer. [•] The assembly based on porphyrin is prepared as parallel sample. [•] Coordination polymer-based assembly shows enhanced photoelectronic behavior. [•] A series of different organic acid ligands as anchoring groups are prepared. [ABSTRACT FROM AUTHOR]

Highlights: [•] A novel self-assembly with porphyrin coordination polymer on TiO2 film. [•] Three zinc porphyrin and their respective Hg(II) coordination polymers. [•] The X-ray structure of a Hg(II) porphyrin coordiantion polymer. [•] Significantly enhanced the current-voltage behavior of these assemblies. [Copyright &y& Elsevier]

Abstract: Reactions of Zn(NO3)2∙6H2O with 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene (titmb) in the presence of 1,4-benzenedicarboxylic acid (1,4-H2BDC) or 1,3-benzenedicarboxylic acid (1,3-H2BDC) under hydrothermal conditions afforded one 1D and one 2D coordination polymers [Zn3(titmb)2(1,4-BDC)3(H2O)6] (1) and [Zn2(titmb)(1,3-BDC)2(H2O)] (2), respectively. Similar reactions of Zn(NO3)2∙6H2O with 1,3-bis(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene (bitmb) and 1,4-H2BDC gave rise to one 2D coordination polymer [Zn2(bitmb)2(1,4-BDC)2] (3). Compound 1 has a 1D linear chain formed from linking 24-membered [Zn2(titmb)2] metallamacrocycles and [Zn(1,4-BDC)(H2O)2] units via imidazolyl groups of titmb ligands. Compound 2 has a 2D network assembled from connecting spiral [Zn n (1,3-BDC) n ] chains with titmb linkers, while compound 3 also has a 2D network formed by linking 24-membered [Zn2(bitmb)2] metallamacrocycles via 1,3-BDC bridges. The ligands titmb and bitmb in compounds 1–3 adopt less-common cis–trans–trans and cis–trans conformations, respectively. Their thermal and photoluminescent properties were also investigated. [Copyright &y& Elsevier]

Hydrothermal reactions of CdSO4 with tetrakis(4-pyridyl)cyclobutane (tpcb) and 1,3-benzenedicarboxylic acid (1,3-H2BDC) or 5-nitro-1,3-benzenedicarboxylic acid (5-NO2-1,3-H2BDC) resulted in the formation of two coordination polymers [Cd(tpcb)0.5(1,3-BDC)]n (1) and {[Cd2(tpcb)(5-NO2-1,3-BDC)2(OH2)2]·4H2O}n (2), respectively. Compounds 1 and 2 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 and 2 exhibit two different types of two-fold interpenetrating 3D architectures with (66)2(64 ·82) and (52 ·8)(54 ·6∙8)(4·53 ·62 ·7·82 ·10) Schläfli symbols, respectively. Their thermal and photoluminescent properties were also investigated. [ABSTRACT FROM AUTHOR]

Hydrothermal reactions of NiCl2·6H2O or CdCl2·2.5H2O with 4,4′-bis(1-imidazolyl)bibenzene (bimb) and 5-oxyacetate isophthalic acid (H3OAIP) resulted in the formation of two coordination polymers [Ni2(HOAIP)2(bimb)3(H2O)2] n (1) and [Cd3(OAIP)2(bimb)(H2O)2] n ·2nH2O (2), respectively. Compounds 1 and 2 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 exhibits three-fold interpenetrating 3D architecture with a (44 ·65 ·8) Schläfli symbol in which 1D [Ni(HOAIP)] n chains are interlinked by bimb ligands. In 2, the two [Cd2(OAIP)4] and [Cd2(OAIP)4(H2O)4] units are interconnected by OAIP and bimb to afford a 3D network with a unique (4·82)4(42 ·68 ·85)2(86) Schläfli symbol. The results showed that metal ions did exert great influence upon the coordination modes and the geometrical conformations of ligands and the topological structures of the final products. Their thermal and photoluminescent properties were also investigated. [ABSTRACT FROM AUTHOR]

Abstract: The solvothermal reactions of Zn(NO3)2∙6H2O with 1,4-benzenedicarboxylic acid (1,4-H2bdc) and 1,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)butane (dmpzb) or 1,6-bis(3,5-dimethyl-1H-pyrazol-1-yl)hexane (dmpzh) afforded two three-dimensional coordination polymers [Zn3(1,4-bdc)3(dmpzb)] n (1) and [Zn2(1,4-bdc)2(dmpzh)] n (2), respectively. Compounds 1 and 2 were characterized by elemental analysis, IR, powder X-ray diffraction, and single crystal X-ray diffraction. Compound 1 has an 8-connected 3D net (a 364185262 Schläfli symbol) assembled from trinuclear [Zn3(1,4-bdc)3] units and 1,4-bdc and dmpzb bridges. Compound 2 has a 6-connected 3D net (with a 485463 Schläfli symbol) constructed from binuclear [Zn2(1,4-bdc)2] units and 1,4-bdc and dmpzh linkers. The solid state luminescent and thermal stability properties of 1 and 2 at ambient temperature were also investigated. The results showed that the spacer lengths of bipyrazol-based ligands did affect the topological structures of zinc(II) coordination polymers. [Copyright &y& Elsevier]

Abstract: Solvothermal reactions of Cu2(OH)2CO3 with 1,2-bis(4-pyridyl)ethane (bpe) and iodobenzene or 4-iodotoluene in acetonitrile and aqueous ammonia afforded two arylamine-solvated [Cu2I2]-based coordination polymers {[Cu2I2(bpe)2]∙Am} n (1: Am=aniline; 2: Am= p-toluidine). Compounds 1 and 2 were characterized by elemental analysis, IR spectra, and powder X-ray diffraction (PXRD). Compounds 1 and 2 have a two-dimensional (4,4) topological network in which every rhombic [Cu2I2] dimer acts as a planar four-connected node to link other four equivalent ones by four bpe bridges. Each layer is further stacked via π–π interactions to form a 3D structure with 1D rhombic channels occupied by the guest aniline or p-toluidine molecules. These guest molecules were in situ generated through Ullmann coupling reactions of iodobenzene or 4-iodotoluene with ammonia. The thermal and photoluminescent properties of 1 and 2 were also investigated. [Copyright &y& Elsevier]

Solvothermal reactions of bulk CuSCN with six flexible benzimidazolyl-based ligands with different spacer lengths [(bzim)(CH2)n(bzim)] (bzim = benzimidazolyl; n = 1, mbbm; n = 2, ebbm; n = 3, prbbm; n = 4, bbbm; n = 5, pbbm; n = 6, hbbm) afforded a series of new [CuSCN]n-supported coordination polymers, [(CuSCN)2(mbbm)]n (1), [(CuSCN)2(ebbm)2]n (2), [(Cu(SCN)2(prbbm)]n (3a), [{(CuSCN)2(prbbm)2}·2MeCN]n (3b), [(CuSCN)4(bbbm)3]n (4), [(CuSCN)2(pbbm)]n (5), and [(CuSCN)2(hbbm)]n (6), respectively. Compounds 1−6 were characterized by elemental analysis, IR, and X-ray crystallography. Compound 1, 3a, or 6 possesses the similar staircase-like [CuSCN]n chains that are bridged by mbbm, prbbm, or hbbm to form one one-dimensional (1D) chain with an oblong channel (3a) or two two-dimensional (2D) networks (1 and 6). Compound 2 or 3b consists of a dimeric [CuSCN]2 fragment that serves either as a 4-connecting node to link the other four equivalent ones via two pairs of ebbm bridges to form a 2D (4,4) network (2) or as a 2-connecting node to bridge its two adjacent ones via a pair of prbbm bridges to form a 1D chain (3b). Compound 4 contains a new kind of [CuSCN]n double chain that is connected by bbbm with two conformations to form a unique 2D network, while 5 consists of a [CuSCN]n single chain that is linked by pbbm to form the other kind of 1D chain with an oblong channel. In addition, the photoluminescent properties of 1−6 in solid state at ambient temperature were also investigated. Solvothermal cracking reactions of bulk CuSCN with six flexible benzimidazolyl-based ligands with different spacer lengths [(bzim)(CH2)n(bzim)] (bzim = benzimidazolyl; n = 1, mbbm; n = 2, ebbm; n = 3, prbbm; n = 4, bbbm; n = 5, pbbm; n = 6, hbbm) afforded seven new [CuSCN]n-based coordination polymers, [(CuSCN)2(mbbm)]n, [(CuSCN)2(ebbm)2]n, [(Cu(SCN)2(prbbm)]n, [{(CuSCN)2(prbbm)2}·2MeCN]n, [(CuSCN)4(bbbm)3]n, [(CuSCN)2(pbbm)]n, and [(CuSCN)2(hbbm)]n. These compounds were characterized by elemental analysis, IR, and X-ray crystallography. [ABSTRACT FROM AUTHOR]

Abstract: Two 1D coordination polymeric isomers with the same chemical formula [Cu(2,2′-bipy)(Htda)] n (2,2′-bipy=2,2′-bipyridine, Htda=1,2,3-triazole-4,5-dicarboxylate) were solvothermally prepared and structurally characterized. X-ray analysis revealed that one isomer has a 1D staircase chain structure while the other possesses a 1D spiral chain structure. The electrochemical behaviors of both isomers in solution were also investigated by cyclic voltammetry. [Copyright &y& Elsevier]