Jin-Xiang Chen

One Unique 1D Silver(I)-Bromide-Thiol Coordination Polymer Used for Highly Efficient Chemiresistive Sensing of Ammonia and Amines in Water

Reaction of AgBr with TabHPF6 (TabH = 4-(trimethylammonio)benzenethiol) readily produces a unique one-dimensional coordination polymer [(TabH)(AgBr2)]n (1), consisting of anionic chains [AgBr2]n(n-) with hydrogen bonds to TabH(+) cations. By examining its electrical resistance and stability upon exposure to ammonia and seven common organic amines in water under ambient conditions, compound 1 is found to exhibit good stability and reproducibly high sensitivity toward these analytes at low concentrations. Especially, it can selectively detect NH3 in water with the detection limit as low as 0.05 ppm. This chemiresistive sensing system has the potential for highly efficient monitoring of ammonia and amines responsible for water pollution, eutrophication, food contamination, and industrial hazards.

S-[4-(Trimethylammonio)phenyl]thiosulfate, an aromatic organic thiosulfate.

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) A, while the S—O bond lengths are in the range 1.4417 (12)–1.457 (2) A. 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.

Unique formation of two different W/Ag/S clusters from the same components via a low heating temperature solid state reaction and a solution reaction and their third-order NLO properties in solution

Reaction of (NH4)2[WS4], [Ag(MeCN)4](PF6) and dppm (molar ratio = 1∶2∶4) in the solid state at 110 °C followed by extraction with CH2Cl2 yielded a hexanuclear neutral cluster [(WS4)2Ag4(dppm)3] 1, while the same materials when mixed directly in CH2Cl2 produced a tetranuclear cluster salt [WS4Ag3(dppm)4](PF6) 2; both compounds showed modest third-order optical nonlinearities.

CCDC 604372: Experimental Crystal Structure Determination

Related Article: Jin-Xiang Chen, Wen-Hua Zhang, Xiao-Yan Tang, Zhi-Gang Ren, Yong Zhang, Jian-Ping Lang|2006|Inorg.Chem.|45|2568|doi:10.1021/ic051875n

catena-Poly[[[diaqua­[trans-3-(4-pyri­dyl)acrylato]samarium(III)]-di-μ-trans-3-(4-pyrid­yl)acrylato] dihydrate]

In the title compound, {[Sm(4-pya)(3)(H(2)O)(2)].2H(2)O}(n) [4-pya is trans-3-(4-pyridyl)acrylate, C(8)H(6)NO(2)], each Sm(III) 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)(H(2)O)(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.