1-Picolyl-3-propylbenzimidazolium bromide （LBr） was prepared from benzimida- zole by alkylation with 2-chloromethyl-pyridine in the presence of NaH, followed by quaternization with 1-bromopropane. Ligand LBr was tre...1-Picolyl-3-propylbenzimidazolium bromide （LBr） was prepared from benzimida- zole by alkylation with 2-chloromethyl-pyridine in the presence of NaH, followed by quaternization with 1-bromopropane. Ligand LBr was treated with AgBr in CH2Cl2 to afford a dinuclear silver（I） complex L2Ag2Br4 （1）. In complex 1, a 2-D supramolecular layer is formed through two types of π-π stacking interactions. Fluorescent emission spectra of ligand LBr and complex 1 are described.展开更多
A novel Cu（Ⅱ） complex has been prepared by means of self-assembly of CuCl2, 1-hexylimidazole L and oxalic acid （H2OX） in the presence of triethylamine, and structurally characterized by X-ray diffraction analysis...A novel Cu（Ⅱ） complex has been prepared by means of self-assembly of CuCl2, 1-hexylimidazole L and oxalic acid （H2OX） in the presence of triethylamine, and structurally characterized by X-ray diffraction analysis. In complex 1, 1-D polymer chains are formed through pentacoordinated Cu（Ⅱ）, oxalate and bridging chlorine atoms. In the crystal packing of 1, the imidazole ring head-to-tail π-πstacking interactions exist between 1-D polymer chains and extend the 1-D polymer chains into 2-D supramolecular layers. The fluorescence emission spectra of L and 1 were described.展开更多
1-Butylbenzimidazole L reacted with Cd（NO3）2·4H2O to afford complex [CdL（NO3）3H2O]·[HL] 1. The heptacoordinated Cd（Ⅱ） center adopts a distorted pentagongal bipyramidal geometry, and complex [CdL（NO3...1-Butylbenzimidazole L reacted with Cd（NO3）2·4H2O to afford complex [CdL（NO3）3H2O]·[HL] 1. The heptacoordinated Cd（Ⅱ） center adopts a distorted pentagongal bipyramidal geometry, and complex [CdL（NO3）3H2O]-entity and the protonated benzimidazium salt [HL]＋ are connected via N–H···O hydrogen bond to form a dimeric unit [CdL（NO3）3H2O]·[HL]. A 3-D supramolecular network of 1 is formed through N–H···O and O–H···O hydrogen bonds together with π-π stacking interactions. Reaction of L with CuCl2 afforded a mononuclear complex, [CuL2Cl2] 2, in which the tetracoordinated Cu（II） center adopts a distorted tetrahedral geometry. In contrast, 2-D supramolecular layers of 2 are formed by C–H···Cl hydrogen bonds. The fluorescent emission spectra of L, 1 and 2 are described.展开更多
Dinuclear silver(I) six membered ring complex [Ag 2(bta) 2 (hmbta) 2](ClO 4) 2 (3) has been synthesized by the reaction of benzotriazole (bta) (1) and 1 hydroxymethyl benzotriazole (hmbta) (2) with Ag(...Dinuclear silver(I) six membered ring complex [Ag 2(bta) 2 (hmbta) 2](ClO 4) 2 (3) has been synthesized by the reaction of benzotriazole (bta) (1) and 1 hydroxymethyl benzotriazole (hmbta) (2) with Ag(CH 3CN) 4ClO 4. The structures of compound 2 and Complex 3 have been studied by single crystal X ray diffraction analysis. The change of luminescent intensity of 1, 2 and 3 was reported. Compound 2 crystallizes in the monoclinic system with space group P 2(1)/ c, a =0 7655(10) nm, b =1 0126(14) nm, c =0 9502(13) nm, β =95 07(2)°, V =0 7337(17) nm 3 and Z =4. Complex 3 crystallizes in the triclinic system with space group P 1-, a =0 73611(18) nm, b =0 9152(2) nm, c =1 2277(3) nm, β =87 170(5)°, V =0 8221(3) nm 3 and Z =1. The main structural feature of complex 3 is a symmetric dinuclear six membered ring formed by two silver(I) atoms and four N atoms from two benzotriazoles. The second structural feature of complex 3 is the π π stacking interaction between two adjacent molecular planes, which forms the two dimentional layer structure. Besides, compared with 2, the luminescent intensity of complex 3 shows a remarkable enhancement.展开更多
基金supported by the National Natural Science Foundation of China (No. 20872111)the Natural Science Foundation of Tianjin (No.11JCZDJC22000)
文摘1-Picolyl-3-propylbenzimidazolium bromide （LBr） was prepared from benzimida- zole by alkylation with 2-chloromethyl-pyridine in the presence of NaH, followed by quaternization with 1-bromopropane. Ligand LBr was treated with AgBr in CH2Cl2 to afford a dinuclear silver（I） complex L2Ag2Br4 （1）. In complex 1, a 2-D supramolecular layer is formed through two types of π-π stacking interactions. Fluorescent emission spectra of ligand LBr and complex 1 are described.
基金supported by the NNSFC (No. 20672081)the Natural Science Foundation of Tianjin (07JCYBJC00300)
文摘A novel Cu（Ⅱ） complex has been prepared by means of self-assembly of CuCl2, 1-hexylimidazole L and oxalic acid （H2OX） in the presence of triethylamine, and structurally characterized by X-ray diffraction analysis. In complex 1, 1-D polymer chains are formed through pentacoordinated Cu（Ⅱ）, oxalate and bridging chlorine atoms. In the crystal packing of 1, the imidazole ring head-to-tail π-πstacking interactions exist between 1-D polymer chains and extend the 1-D polymer chains into 2-D supramolecular layers. The fluorescence emission spectra of L and 1 were described.
基金Supported by the National Natural Science Foundation of China (No. 20872111)Natural Science Foundation of Tianjin (07JCYBJC00300)
文摘1-Butylbenzimidazole L reacted with Cd（NO3）2·4H2O to afford complex [CdL（NO3）3H2O]·[HL] 1. The heptacoordinated Cd（Ⅱ） center adopts a distorted pentagongal bipyramidal geometry, and complex [CdL（NO3）3H2O]-entity and the protonated benzimidazium salt [HL]＋ are connected via N–H···O hydrogen bond to form a dimeric unit [CdL（NO3）3H2O]·[HL]. A 3-D supramolecular network of 1 is formed through N–H···O and O–H···O hydrogen bonds together with π-π stacking interactions. Reaction of L with CuCl2 afforded a mononuclear complex, [CuL2Cl2] 2, in which the tetracoordinated Cu（II） center adopts a distorted tetrahedral geometry. In contrast, 2-D supramolecular layers of 2 are formed by C–H···Cl hydrogen bonds. The fluorescent emission spectra of L, 1 and 2 are described.
文摘Dinuclear silver(I) six membered ring complex [Ag 2(bta) 2 (hmbta) 2](ClO 4) 2 (3) has been synthesized by the reaction of benzotriazole (bta) (1) and 1 hydroxymethyl benzotriazole (hmbta) (2) with Ag(CH 3CN) 4ClO 4. The structures of compound 2 and Complex 3 have been studied by single crystal X ray diffraction analysis. The change of luminescent intensity of 1, 2 and 3 was reported. Compound 2 crystallizes in the monoclinic system with space group P 2(1)/ c, a =0 7655(10) nm, b =1 0126(14) nm, c =0 9502(13) nm, β =95 07(2)°, V =0 7337(17) nm 3 and Z =4. Complex 3 crystallizes in the triclinic system with space group P 1-, a =0 73611(18) nm, b =0 9152(2) nm, c =1 2277(3) nm, β =87 170(5)°, V =0 8221(3) nm 3 and Z =1. The main structural feature of complex 3 is a symmetric dinuclear six membered ring formed by two silver(I) atoms and four N atoms from two benzotriazoles. The second structural feature of complex 3 is the π π stacking interaction between two adjacent molecular planes, which forms the two dimentional layer structure. Besides, compared with 2, the luminescent intensity of complex 3 shows a remarkable enhancement.
