✍ Scribed by Hui Jiang; Jian-Fang Ma; Wen-Li Zhang; Ying-Ying Liu; Jin Yang; Guang-Ju Ping; Zhong-Min Su
No coin nor oath required. For personal study only.
Eleven coordination polymers constructed from three structurally related flexible bis(benzimidazole) ligands, 1,1′‐(1,4‐butanediyl)bis(2‐methylbenzimidazole) (L^1^), 1,1′‐(1,4‐butanediyl)bis(2‐ethylbenzimidazole) (L^2^), and 1,1′‐(1,4‐butanediyl)bis(2‐benzylbenzimidazole) (L^3^), have been synthesized: [Zn(cin)~2~(L^1^)]·H~2~O (1), [Zn(cin)~2~(L^2^)] (2), [Cd(cin)~2~(L^1^)]·H~2~O (3), [Cd(cin)~2~(L^2^)] (4), [Ag(MES)(L^1^)~0.5~] (5), [Ag(MES)(L^2^)~0.5~]·H~2~O (6), [Zn(adi)(L^1^)]·H~2~O (7), [Zn(adi)(L^2^)~0.5~] (8), [Cd(adi)(L^1^)]·2H~2~O (9), [Cd(adi)(L^2^)] (10), and [Cd(adi)(L^3^)]·2H~2~O (11), where cin = cinnamate anion, MES = 2‐(N‐morpholino)ethanesulfonate anion, and adi = adipate dianion. For compounds 1–4, the cin anions are coordinated to metal ions in monodentate mode or bidentate chelating mode, and metal cations are bridged by L^1^ or L^2^ ligands to form 1‐D chain structures. Compound 5 shows a 1‐D chain structure which comprises a dimeric unit that is built from two silver ions and two MES anions. In compound 6, silver ions are bridged by MES anions and L^2^ ligands to form a 2‐D (6, 3) network while compounds 7–9 possess 2D (4, 4) networks. In the structure of compound 8, there exists a dimeric unit which is built from two zinc ions bridged by four carboxylate groups. Compound 10 exhibits a fourfold interpenetrating diamondoid net, and compound 11 displays a noninterpenetrating diamondoid framework. The luminescent properties for 1–11 are also discussed in detail.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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