15 results on '"Jin-Xiang Chen"'
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2. Transmetalation of a Dodecahedral Na9 Aggregate-Based Polymer: A Facile Route to Water Stable Cu(II) Coordination Networks.
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Jin-Xiang Chen, Ming Chen, Ni-Ni Ding, Wen-Hua Chen, Wen-Hua Zhang, Andy Hor, T. S., and Young, David J.
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METALATION , *COORDINATION compounds , *COPPER compounds , *MOLECULAR structure of complex compounds , *ZWITTERIONS , *MACROCYCLIC compounds - Abstract
A variety of network structures have been prepared by transmetalation of a polymer {Na3[Na9(Cbdcp)6(H2O)18]}n (1) (Cbdcp = N-(4-carboxybenzyl)-(3,5-dicarboxyl)pyridinium) containing dodecahedral Na9 aggregate secondary building units with Cu(II) by modulating the temperature, solvent, and pH. These complexes include a large, zwitterionic hexa-cuprometallocycle [Cu6(Cbdcp)6(H2O)18] (2) formed in H2O at room temperature, two three-dimensional polymers [Cu3(Cbdcp)2(OH)2(H2O)2]n (3) and {[Cu3(Cbdcp)2(OH)2]·2H2O}n (4) isolated from H2O and DMF/H2O at 135 °C, and a mononuclear complex [Cu(HCbdcp)2(H2O)3]·H2O (5) from H2O at 100 °C and pH = 6. All the complexes are robust and water stable. The crystal framework of macrocycle 2 is stable up to 100 °C under vacuum and selectively adsorbs CO2. [ABSTRACT FROM AUTHOR] more...
- Published
- 2014
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Catalog
3. Formation of Four Different [MoOS3Cu3]-Based Coordination Polymers from the Same Components via Four Synthetic Routes.
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Jin-Xiang Chen, Xiao-Yan Tang, Yang Chen, Wen-Hua Zhang, Ling-Ling Li, Rong-Xin Yuan, Yong Zhang, and Jian-Ping Lang
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COORDINATION polymers , *BIPYRIDINE , *SOLID state chemistry , *X-ray crystallography , *EXTRACTION (Chemistry) , *CHEMICAL reactions , *ANILINE - Abstract
Assembly of different [MoOS3Cu3]-based coordination polymers from the same components ([(n-Bu)4N]2[MoOS3Cu3(NCS)3] (1) and 4,4â²-bypyridine (4,4â²-bipy)) via different synthetic approaches has been investigated. Treatment of 1with 4,4â²-bipy (molar ratio = 1:1) in aniline afforded {[{MoOS3Cu3(NCS)(ani)2}2(4,4â²-bipy)3]·6(ani)}n(ani = aniline) (2), while solid state reaction of 1with equimolar 4,4â²-bipy at ambient temperature followed by extraction with aniline yielded {[(n-Bu)4N]2[{MoOS3Cu3(NCS)2}2(4,4â²-bipy)3]·2(ani)}n(3). Diffusion reactions of an aniline solution of 1with an aniline solution of 4,4â²-bipy in a straight or zigzag glass tube resulted in the formation of {[MoOS3Cu3(NCS)(4,4â²-bipy)2.5]·3(ani)}n(4) and {[(MoOS3Cu3)2(NCS)(μ-NCS)(4,4â²-bipy)4.5]·7(ani)}n(5), respectively. Compounds 2â5have been characterized by elemental analysis, IR spectra, and single-crystal X-ray crystallography. Compounds 2consists of a 1D zigzag chain in which the dimeric [{MoOS3Cu3(NCS)(ani)2}2(4,4â²-bipy)2] units are linked by single 4,4â²-bipy bridges, while 3possesses a one-dimensional spiral chain built of the dimeric [{MoOS3Cu3(NCS)2}2(4,4â²-bipy)2] units bridged by 4,4â²-bipy ligands. Compound 4contains a three-dimensional (3D) 3-fold interpenetrated network in which each [MoOS3Cu3] core acts as a tetrahedral four-connecting node to interconnect four other equivalent ones via single and double 4,4â²-bipy bridges. Compound 5has a unique 3D 2-fold interpenetrated network in which the [MoOS3Cu3] cores work as trigonal-pyramidal four- and tetragonal-pyramidal five-connecting nodes to link other equivalent cores through single thiocyanate bridges and single and double 4,4â²-bipy bridges. The results may provide interesting insights into effects of synthetic approaches on the construction of cluster-based coordination polymers. [ABSTRACT FROM AUTHOR] more...
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- 2009
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4. Toward Rational Construction of Gold, Gold-Silver, and Gold-Mercury String Complexes: Syntheses, Structures, and Properties of [Au(Tab)2]2L2 (L = I and PF6), {[(Tab)2M][Au(CN)2]}2 (M Au and Ag), and {[Hg(Tab)2][Au(CN)2]2} [Tab = 4-(Trimethylammonio)benzenethiolate].
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Jin-Xiang Chen, Wen-Hua Zhang, Xiao-Yan Tang, Zhi-Gang Ren, Hong-Xi Li, Yong Zhang, and Jian-Ping Lang
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COMPLEX compounds , *SPECTRUM analysis , *CRYSTALLOGRAPHY , *CATIONS , *INORGANIC chemistry - Abstract
The reaction of Aul with 2 equiv of TabHPF6 [TabH = 4-(trimethylammonio)benzenethiol] in the presence of excess Et3N in dimethylformamide (DMF)/MeOH afforded a binuclear gold(l) complex [Au(Tab)2]2I2•2H2O (1). Anion exchange of 1 with NH4PF6 in DMF gave rise to the more soluble complex [Au(Tab)2]2(PF6)2 (2). Treatment of 2 with K[Au-(CN)2] produced a tetranuclear gold(l) complex {[(Tab)2Au]IAu(CN)2]}2 (3). Analogous reactions of two known mononuclear complexes [Ag(Tab)2](PF6) (4) and [Hg(Tab)2](PF6)2 (5) with 1 or 2 equiv of K[Au(CN)2] generated one Ag2Au2 complex {[(Tab)2Ag][Au(CN)2]}2 (6) and one Au/Hg complex {[Hg(Tab)2][Au(CN)2]2} (7), respectively. Compounds 1-3, 6, and 7 were fully characterized by elemental analysis, IR spectra, UV-vis spectra, ¹H NMR, and single-crystal X-ray crystallography. 1 and 2 have a similar [Au(Tab)2]22+ dimeric structure in which the two [Au(Tab)2]+ cations are connected via one Au-Au aurophilic interaction. In the structure of 3 or 6, each of the two pairs of [M(Tab)2]+ cation and [Au(CN)2]- anion is held together via ionic interactions to form a {[(Tab)2M][Au-(CN)2}} species (M = Au, 3; Ag, 6). Two such species are further connected by one Au-Au aurophilic bonding interaction to form an uncommon Au4 or Ag2Au2 linear string structure with three ligand-unsupported metal-metal bonds. For 7, the [Hg(Tab)2]2+ dication and the [Au(CN)2]22- dianion are interconnected by the secondary Hg⋯N(CN) interactions to form a 1D chain structure. The thermal and luminescent properties of 1-3, 6, and 7 in solid state were also investigated. [ABSTRACT FROM AUTHOR] more...
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- 2006
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5. Construction of [(η-C5Me5)WS3Cu3]-Based Supramolecular Compounds from Preformed Incomplete Cubane-Like Clusters [PPh4][(η5-C5Me5)WS3(CuX)5] (X = CN, Br).
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Qing-Feng Xu, Jin-xiang Chen, Wen-hua Zhang, Zhi-Gang Ren, Hong-Xi Li, Yong Zhang, and Jian-Ping Lang
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CRYSTALLOGRAPHY , *SUPRAMOLECULAR chemistry , *PHYSICAL & theoretical chemistry , *MACROMOLECULES , *BIPYRIDINE , *SPECTRUM analysis - Abstract
Approaches to the assembly of (η5-C5Me5)WS3Cu3-based supramolecular compounds from two preformed incomplete cubane-like clusters [PPh4][(η5-C5Me5)WS3(CuX)3] (X = CN, 1a; X = Br, 1b) have been investigated. Treatment of 1a with LiBr/1,4-pyrazine (1,4-pyz), pyridine (py), LiCl/py, or 4,4′-bipyridine (4,4′-bipy) and treatment of 1b with 4,4′-bipy gave rise to a new set of W/Cu/S cluster-based compounds, [Li{((η5-C5Me5)WS3Cu3(μ3-Br))2(μ-CN)3}·C6H6]∞. (2), [(η5-C5Me5)WS3Cu3(μ-CN)2(py)]∞. (3), {[PPh4][(η5-C5Me5)WS3Cu3(μ3-Cl)(μ-CN)(CN)]·py}∞. (4), [PPh4]2-[(η5-C5Me5)WS3Cu3(CN)2]2(μ-CN)2(4,4′-bipy) (5), and {[(η5-C5Me5)WS3Cu3Br(μ-Br)(4,4′-bipy)]·Et2O}∞. (6). The structures of 2-6 have been characterized by elemental analysis, IR spectra, and single-crystal X-ray crystallography. Compound 2 displays a 1D ladder-shaped chain structure built of squarelike {[(η5-C5Me5)WS3Cu3(μ3-Br)(μ-CN)]4}∞ (μ-CN)22- anions via two pairs of Cu-μ-CN-Cu bridges. Compound 3 consists of a single 3D diamondlike network in which each (η5-C5Me5)WS3Cu3 unit, serving as a tetrahedral node, interconnects with four other nearby units through Cu-μ-CN-Cu bridges. Compound 4 contains a 1D zigzag chain array made of cubane-like [(η5-C5Me5)WS3-Cu3(μ3-Cl)(μ-CN)(CN)]- anions linked by a couple of Cu-μ-CN-Cu bridges. Compound 5 contains a dimeric structure in which the two incomplete cubane-like [(η5-C5Me5)WS3(CuCN)2(μ-CN)] anions are strongly held together via a pair of Cu-μ-CN-Cu bridges. Compound 6 contains a 2D brick-wall layer structure in which dimers of [(η5-C5-Me5) WS3Cu3Br(4,4′-bipy)]2 are interconnected via four Cu-μ-Br-Cu bridges. The successful construction of (η5-C5Me5)WS3Cu3-based supramolecular compounds 2-6 from the geometry-fixed clusters la and lb may expand the scope of the rational design and construction of cluster-based supramolecular assemblies. [ABSTRACT FROM AUTHOR] more...
- Published
- 2006
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6. Assembly of a New Family of Mercury(lI) Zwitterionic Thiolate Complexes from a Preformed Compound [Hg(Tab)2](PF6)2 [Tab = 4-(Trimethylammonio)benzenethiolate].
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Jin-Xiang Chen, Wen-Hua Zhang, Xiao-Yan Tang, Zhi-Gang Ren, Yong Zhang, and Jian-Ping Lang
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MERCURY compounds , *LIPOIC acid , *X-ray crystallography , *METALLOTHIONEIN , *LINE geometry - Abstract
Reactions of Hg(OAc)2 with 2 equiv of TabHPF6 FabH = 4-(trimethylammonio)benzenethiol] in MeCN/MeOH afforded a mononuclear linear complex [Hg(Tab)2](PF6)2 (1). By using 1 as a precursor, a new family of mercury(II) zwitterionic thiolate complexes, [Hg2(Tab)6](PF6)4•2MeCN (2•2MeCN), [Hg(Tab)2(SCN)](PF6) (3), [Hg(Tab)2(SCN)2] (4), [Hg-(Tab)l2] (5), {[Rg(Tab)2]4[Hgl2][Hg2∣6]}(PF6)2(N03)4 (6), [Hg(Tab)2][Hgl4] (7), [Hg(Tab)2][HgCl2(SCN)2] (8), [Tab-Tab]2[Hg3Cl10] (9), and [Hg2(Tab)6]3(PF6)Cl11 (10), were prepared and characterized by elemental analysis, IR spectra, UV-vis spectra, ¹H· NMR, and single-crystal X-ray crystallography. The [Hg2(Tab)6]4+ tetracation of 2 or 10 contains an asymmetrical Hg2S2 rhomb with an inversion center lying on the midpoint of the Hg⋯Hg line. The Hg atom of the [Hg(Tab)2]2+ dication of 3 is coordinated to one SCN-, forming a rare T-shaped coordination geometry, while in 4, the Hg atom of [Hg(Tab)2]2+ is coordinated to two SCN-, forming a seesaw-shaped coordination geometry. Through weak secondary Hg⋯S coordinations, each cation in 3 is further linked to afford a one-dimensional zigzag chain. The trigonal [Hg(Tab)l2] molecules in 5 are held together by weak secondary Hg⋯I and Hg⋯S interactions, forming a one-dimensional chain structure. In 6, the four [Hg(Tab)2]2+ dications, one Hgl2 molecule, one [Hg2l6]2- dianion, one PF6-, and four NO3- anions are interconnected by complicated secondary Hg⋯l and Hg⋯O interactions, forming a scolopendra-like chain structure. The secondary Hg⋯l interactions, [Hg(Tab)2]2+ and [Hgl4]2- in 7, are combined to generate a one-dimensional chain structure, while [Hg(Tab)2]2+ and [HgCl2(SCN)2]2- in 8 are interconnected by secondary Hg⋯N interactions to form a one-dimensional zigzag chain structure. Compound 9 consists of two [Tab-Tab]2+ dications and one [Hg3Cl10]4- tetraanion. The facile approach to the construction of 2–8 and 10 from 1 may be applicable to the mimicking of a coordination sphere of the Hg sites of metallothioneins. [ABSTRACT FROM AUTHOR] more...
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- 2006
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7. catena-Poly[[[diaqua[ trans-3-(4-pyridyl)acrylato]samarium(III)]-di-μ- trans-3-(4-pyridyl)acrylato] dihydrate].
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Yan-Jun Zhu, Jin-Xiang Chen, Wen-Hua Zhang, Yong Zhang, and Jian-Ping Lang
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SAMARIUM , *CRYSTALLOGRAPHY , *DIMERS , *HYDROGEN bonding , *GEOMETRY - Abstract
In the title compound, {[Sm(4-pya)3(H2O)2]·2H2O} n [4-pya is trans-3-(4-pyridyl)acrylate, C8H6NO2], each SmIII atom is ten-coordinated and has a bicapped square-antiprismatic coordination geometry. There is a crystallographic center of symmetry at the mid-point of the Sm⋯Sm line within each [Sm(4-pya)3(H2O)2]2 dimer. Each dimer is interconnected by two pairs of bridging 4-pya ligands to form a one-dimensional chain. Neighboring chains are connected via hydrogen bonds to form a three-dimensional network. [ABSTRACT FROM AUTHOR] more...
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- 2005
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8. Bis[4-(trimethylammonio)phenyl] disulfide tetraiodomercurate(II).
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Jin-Xiang Chen, Wen-Hua Zhang, Zhi-Gang Ren, Yong Zhang, and Jian-Ping Lang
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PHENYL compounds , *ATOMS , *METHYL groups , *PHYSICAL & theoretical chemistry , *ORGANIC compounds - Abstract
The title compound, (C18H26N2S2)[HgI4], consists of a discrete tetraiodomercurate(II) dianion and a bis[4-(trimethylammonio)phenyl] disulfide (Tab-Tab) dication. The geometry about the Hg atom in the dianion is a slightly distorted tetrahedral. The Tab-Tab dications are arranged parallel to each other. Three I atoms of the HgI42− dianion are connected to the adjacent H atoms of the methyl and phenyl groups of the Tab-Tab dications to form a two-dimensional network. [ABSTRACT FROM AUTHOR] more...
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- 2005
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9. S-[4-(Trimethylammonio)phenyl]thiosulfate, an aromatic organic thiosulfate.
- Author
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Jin-Xiang Chen, Qing-Feng Xu, Yong Zhang, Zain, Sharifuddin M., Seik Weng Ng, and Jian-Ping Lang
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THIOSULFATES , *AROMATIC compounds , *ORGANIC compounds , *HYDROGEN bonding , *CRYSTALLIZATION , *CRYSTALS - Abstract
The title compound, C9H13NO3S2, exists as a zwitterion with crystallographic mirror symmetry. The central S atom of the S2O3 group adopts a slightly distorted tetrahedral coordination geometry. The S-S bond length is 2.1137 (7) Å, while the S-O bond lengths are in the range 1.4417 (12)-1.457 (2) Å. The zwitterions in the crystal adopt a head-to-tail arrangement, which leads to the formation of a three-dimensional network through C-H···O hydrogen bonds. [ABSTRACT FROM AUTHOR] more...
- Published
- 2004
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10. Syntheses, crystal structures and catalytic properties of a series of lanthanide(III) bis(trimethylsilyl)amide chloride complexes: [ ((Me3Si)2N)2Nd(μ'-Cl)Li(THF)3 (μ-Cl)]2, [ ((Me3Si)2N)2Ln(μ'-Cl)Li(THF)2(μ3-Cl)]2 (Ln = Eu, Ho), and [ (Me3Si)2NLn(μ'-Cl)2Li(THF)2 (μ-Cl)]2 (Ln = Nd, Sm, Eu, Ho, Yb).
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Hong-Xi Li, Qing-Feng Xu, Jin-Xiang Chen, Mei-Ling Cheng, Yong Zhang, Wen-Hua Zhang, Jian-Ping Lang, and Qi Shen
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RARE earth metals , *LANTHANIDE shift reagents , *CHLORIDES , *SILYLATION , *MELTING points , *INFRARED spectroscopy , *X-ray diffraction , *GEOMETRY , *CATALYSTS , *POLYMERIZATION - Abstract
Reactions of anhydrous lanthanide(III) trichloride (Ln = Nd, Sm, Eu, Ho, Yb) with one or two equiv. of LiN(SiMe3)2 in THF produced a family of lanthanide(III) bis(trimethylsilyl)amide chloride complexes: [ ((Me3Si)2N)2Nd(mu'-Cl)Li(THF)3 (mu-Cl)]2 (1), [ ((Me3Si)2N)2Ln(mu'-Cl)Li(THF)2 (mu3-Cl)]2 (Ln = Eu (2); Ln = Ho (3)), and [ (Me3Si)2NLn(mu'-Cl)2Li(THF)2 (mu-Cl)]2 (Ln = Nd (4); Ln = Sm (5); Ln = Eu (6); Ln = Ho (7); Ln = Yb (8)). On the other hand, reactions of the monosubstituted silylamido complexes [ (Me3Si)2NLn(mu'-Cl)2Li(THF)2 (mu-Cl)]2 (Ln = Nd (4); Sm (5); Eu (6); Ho (7)) with 2 equiv. of LiN(SiMe3)2 in THF afforded the corresponding disubstituted complexes [ ((Me3Si)2N)2Ln(mu'-Cl)Li(THF)3 (mu-Cl)]2 (Ln = Nd (1); Sm (9)), [ ((Me3Si)2N)2Ln(mu'-Cl)Li(THF)2 (mu3-Cl)]2 (Ln = Sm (9), Eu (2); Ho (3)). These complexes were characterized by melting point determination, elemental analysis and IR spectra. Single-crystal X-ray diffraction studies revealed that these compounds are chloride-bridged dimers, in which Ln metals in 1-3 display a distorted trigonal bipyramidal coordination geometry while those in 5, 6 and 8 a distorted octahedral coordination geometry. Complexes 1-9 exhibited catalytic activity for the ring-opening polymerization of epsilon-caprolactone. [ABSTRACT FROM AUTHOR] more...
- Published
- 2004
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11. Copper-Catalyzed Vinylogous Aerobic Oxidation of Unsaturated Compounds with Air.
- Author
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Hai-Jun Zhang, Schuppe, Alexander W., Shi-Tao Pan, Jin-Xiang Chen, Bo-Ran Wang, Newhouse, Timothy R., and Liang Yin
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COPPER catalysts , *OXIDATION , *UNSATURATED compounds , *REGIOSELECTIVITY (Chemistry) , *FUNCTIONAL groups - Abstract
A mild and operationally simple copper-catalyzed vinylogous aerobic oxidation of β,γ- and α,β-unsaturated esters is described. This method features good yields, broad substrate scope, excellent chemo- and regioselectivity, and good functional group tolerance. This method is additionally capable of oxidizing β,γ- and α,β-unsaturated aldehydes, ketones, amides, nitriles, and sulfones. Furthermore, the present catalytic system is suitable for bisvinylogous and trisvinylogous oxidation. Tetramethylguanidine (TMG) was found to be crucial in its role as a base, but we also speculate that it serves as a ligand to copper(II) triflate to produce the active copper(II) catalyst. Mechanistic experiments conducted suggest a plausible reaction pathway via an allylcopper(II) species. Finally, the breadth of scope and power of this methodology are demonstrated through its application to complex natural product substrates. [ABSTRACT FROM AUTHOR] more...
- Published
- 2018
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12. Platforms Formed from a Three-Dimensional Cu-Based Zwitterionic Metal-Organic Framework and Probe ss-DNA: Selective Fluorescent Biosensors for Human Immunodeficiency Virus 1 ds-DNA and Sudan Virus RNA Sequences.
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Shui-Ping Yang, Shao-Rui Chen, Shu-Wen Liu, Xiao-Yan Tang, Liang Qin, Gui-Hua Qiu, Jin-Xiang Chen, and Wen-Hua Chen
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ZWITTERIONS , *ORGANOMETALLIC compounds , *NUCLEOTIDE sequence , *BIOSENSORS , *SINGLE-stranded DNA , *HIV - Abstract
We herein report a water-stable three-dimensional Cu-based metal-organic framework (MOF) 1 supported by a tritopic quaternized carboxylate and 4,4′-dipyridyl sulfide as an ancillary ligand. This MOF exhibits unique pore shapes with aromatic rings, positively charged pyridinium and unsaturated Cu(II) cation centers, free carboxylates, tessellating H2O, and coordinating SO42- on the pore surface. Compound 1 can interact with two carboxyfluorescein (FAM)-labeled single-stranded DNA sequences (probe ss-DNA, delineated as P-DNA) through electrostatic, π-stacking, and/or hydrogen-bonding interactions to form two P-DNA@1 systems, and thus quench the fluorescence of FAM via a photoinduced electron-transfer process. These P-DNA@1 systems can be used as effective fluorescent sensors for human immunodeficiency virus 1 double-stranded DNA and Sudan virus RNA sequences, respectively, with detection limits of 196 and 73 pM, respectively. [ABSTRACT FROM AUTHOR] more...
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- 2015
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13. Lanthanide-Based Polymers with Charged Ligand Backbones: Triple-Stranded Chain Structures and their DNA Cleavage Studies.
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Ming Chen, Xiao-Yan Tang, Ming-Zhen Chen, Jin-Xiang Chen, and Wen-Hua Chen
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RARE earth metals , *POLYMERS , *METAL complexes , *LIGANDS (Chemistry) , *DNA - Abstract
Four rare-earth metal complexes, [Ln(Ccbp)3(H2O)3]n (Ln = La (1), Ce (2), Pr (3) and Nd (4)) are synthesised from the ligand H2CcbpBr (H2CcbpBr = 4-carboxy-1-(4-carboxybenzyl)pyridinium bromide) and the respective lanthanide metal ions. Complexes 1-4 are isostructural in that every three Ccbp ligands juxtapose two Ln3+ ions in a monodentate coordination mode to form triple-stranded one-dimensional chain structures. Each central Ln3+ atom further associates with three H[sub 2]O molecules, furnishing a monocapped square-antiprism geometry. Agarose gel electrophoresis studies indicate that 1-4 are capable of cleaving DNA in the presence of H[sub 2]O[sub 2], most probably via an oxidative cleavage mechanism. Complexes 1 and 2 exhibited catalytic efficiencies (kmax/KM) of 37.69 and 34.11 h-1 mM-1, and are approx. 15-and 20-fold more effective than those of complexes 3 (kmax/KM= 1.75 h-1 mM-1)and4 (kmax/KM = 221 h-1 mM-1). [ABSTRACT FROM AUTHOR] more...
- Published
- 2015
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14. Mo(W)/Cu/S Cluster-Based Supramolecular Arrays Assembled from Preformed Clusters [Et4N]4[WS4Cu4I6] and [(n-Bu)4N]2[MoOS3Cu3X3] (X = I, SCN) with Flexible Ditopic Ligands.
- Author
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Jian-Ping Lang, Qing-Feng Xu, Wen-Hua Zhang, Hong-Xi Li, Zhi-Gang Ren, Jin-Xiang Chen, and Yong Zhang
- Subjects
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LIGANDS (Chemistry) , *SUPRAMOLECULAR chemistry , *COPPER compounds , *ANIONS , *X-ray crystallography - Abstract
In our working toward the rational design and synthesis of cluster-based suppramolecular architectures, a set of new [WS4Cu4)- or [MoOS3Cu3]-based supramolecular assemblies have been prepared from reactions of preformed cluster compounds [Et4N}4[WS4Cu4I6] (1) and [(n-Bu)4N]2[MoOS3Cu3X3] (2, X = I; 3, X = SCN) with flexible ditopic ligands such as dipyridylsulfide (dps), dipyridyl disulfide (dpds), and their combinations with dicyanamide (dca) anion and 4,4'-bipy. The cluster precursor 1 reacted with dps or dpds and sodium dicyanamide (dca) in MeCN to produce [WS4Cu4I2(dps)3]·2MeCN (4·2MeCN) and [WS4Cu4(dca)2(dpds)2]·Et2O·2MeCN (5·Et2O·2MeCN), respectively. On the other hand, treatment of 2 with dpds in DMF/MeCN afforded [MoOS3Cu3I(dpds)2]·0.5DMF·2(MeCN)0.5 (6·0.5DMF·2(MeCN)0.5) while reaction of 3 with sodium dicyanamide (dca) and 4,4'-bipy in DMF/MeCN gave rise to [MoOS3Cu3(dca)(4,4'-bipy)1.5]·DMF·MeCN (7·DMF·MeCN). Compounds 4·2MeCN, 5·Et2O୲MeCN, 6·0.5DMF·2(MeCN)0.5, and 7·DMF·MeCN have been characterized by elemental analysis, IR spectroscopy, and single-crystal X-ray crystallography. Compound 4 contains a 2D layer array made of the saddle-shaped [WS4Cu4] cores interlinked by three pairs of Cu-dps-Cu bridges. Compound 5 has another 2D layer structure in which the [WS4Cu4] cores are held together by four pairs of Cu-dca--Cu and Cu-dpds-Cu bridges. Compound 6 displays a 1 D spiral chain structure built of the nido-like [MoOS3Cu3] cores via two pairs of Cu-dpds-Cu bridges. Compound 7 consists of a 2D staircase network in which each [MoOS3Cu3(4,4'-bipy)]2 dimeric unit interconnects with four other equivalent units by a pair of 4,4'-bipy ligands and two pairs of dca anions. The [WS4Cu4] core in 4 or 5 and the [MoS3Cu3] core in 7 show a planar 4-connecting node and a seesaw-shaped 4-connecting node, respectively, which are unprecedented in cluster-based supramolecular compounds. The successful assembly of 4-7 from the three cluster precursors 1-3 through flexible ditopic ligands provides new routes to the rational design and construction of complicated cluster-based supramolecular arrays. [ABSTRACT FROM AUTHOR] more...
- Published
- 2006
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15. Bis[4-(trimethylammonio)phenyl] disulfide diiodide acetone solvate.
- Author
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Zheng Zhang, Xiao-Yan Tang, Jian-Ping Lang, and Jin-Xiang Chen
- Subjects
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CRYSTALLOGRAPHY , *ORGANIC compounds research , *IODIDES , *ACETONE , *AMMONIUM ions , *BENZENE - Abstract
The article describes the crystal structure of the organic compound bis[4-(trimethylammonio)phenyl] disulfide diiodide acetone solvate through synthesis and characterization. Findings show the location of iodide ions and acetone solvent molecules between the dications with symmetry-related quaternary ammonium ions around them. Also reported is the position of the anions near the benzene rings as well as the interactions between the acetone atom O1 and atom C7 of the methyl group. Experiment on the preparation of the compound is presented. more...
- Published
- 2009
- Full Text
- View/download PDF
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