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首页> 外文期刊>Crystal growth & design >Architectural Diversity for Anion-Mediated Self-Assembly of Four Pairs of Silver(I) Polymeric Isomers Having Linear and V?Shaped Imidazole/Thiophene/Imidazole Bridging Spacers
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Architectural Diversity for Anion-Mediated Self-Assembly of Four Pairs of Silver(I) Polymeric Isomers Having Linear and V?Shaped Imidazole/Thiophene/Imidazole Bridging Spacers

机译:阴离子介导的四对具有线性和V型咪唑/噻吩/噻唑/咪唑桥接间隔物的银(I)聚合物异构体的阴离子自组装的结构多样性

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A pair of linear and V-shaped acceptor?donor?acceptor (A?D?A) thiophene-based diazole structural isomers [i.e., 2,5-di(1Himidazol- 1-yl)thiophene (L~1) and 3,4-di(1H-imidazol-1-yl)thiophene (L~2)] have been used as bidentate bridging ligands to build Ag(I) fluorescent and semiconducting coordination polymers in the presence of different counterions. X-ray single-crystal diffraction analyses for eight complexes 1?8 reveal that they are four pairs of polymeric isomers formulated as {[Ag(L~1)(CF_3COO)]}_n (1), {[Ag(L~2)- (CF_3COO)]}_n (2), [Ag(L~1)(NO_3)]_n (3), {[Ag(L~2)(NO_3)]·(H_2O)}_n (4), [Ag(L~1)(ClO_4)]_n (5), {[Ag(L~2)](ClO_4)}_n (6), {[Ag(L~1)- (CH_3CN)](PF_6)}_n (7), and {[Ag(L~2)](PF_6)·(CH_3CN)}_n (8). They exhibit abundant structural diversity, namely, a one-dimensional (1D) dimeric chain 1, a double-strand helix 2, a cosinelike chain 3, wavelike chains 4 and 8, linear chains 5 and 7, and a zigzag chain 6 because of the alterations of conformation for μ_2 bridging ligands L~1 and L~2 (cis/cis, cis/trans, and trans/trans) and the participancy of different counterions (CF_3COO~?, NO_3~?, ClO_4~?, and PF_6~?). It is noted that weak Ag(I)?thiophene coordinative bonds are observed in the case of 7 with the Ag?S distance of 3.057(4) ?, which lead to a 13.8× enhancement of solid-state conductivity in comparison with the semiconducting single crystal of 8 at room temperature.
机译:一对线性和V形的受体-供体-受体(A?D?A)噻吩基二唑结构异构体[即2,5-二(1Himidazol-1-基)噻吩(L〜1)和3, 4-二(1H-咪唑-1-基)噻吩(L〜2)已被用作双齿桥联配体,以在不同抗衡离子存在下构建Ag(I)荧光和半导体配位聚合物。八个配合物1-8的X射线单晶衍射分析表明,它们是四对聚合异构体,配制成{[Ag(L〜1)(CF_3COO)]} _ n(1),{[Ag(L〜2 )-(CF_3COO)]} _ n(2),[Ag(L〜1)(NO_3)] _ n(3),{[Ag(L〜2)(NO_3)]·(H_2O)} _ n(4), [Ag(L〜1)(ClO_4)] _ n(5),{[Ag(L〜2)](ClO_4)} _ n(6),{[Ag(L〜1)-(CH_3CN)](PF_6) } _n(7)和{[Ag(L〜2)](PF_6)·(CH_3CN)} _ n(8)。它们显示出丰富的结构多样性,即一维(1D)二聚体链1,双链螺旋2,余弦状链3,波浪状链4和8,线性链5和7以及之字形链6,因为μ_2桥接配体L〜1和L〜2(顺式/顺式,顺式/反式和反式/反式)的构象变化以及不同抗衡离子(CF_3COO〜?,NO_3〜?,ClO_4〜?和PF_6)的参与度〜?)。值得注意的是,在7的情况下观察到弱的Ag(I)?噻吩配位键,Ag?S距离为3.057(4)?,与半导体相比,固态电导率提高了13.8倍。在室温下为8的单晶。

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