Spontaneous Assembly of d−f Coordination Frameworks: Syntheses, Structures, and Photoluminescence
Spontaneous Assembly of d−f Coordination Frameworks: Syntheses, Structures, and Photoluminescence
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DOI：
10.1021/cg900571v
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发表时间：
2010-01
影响因子：
3.8
通讯作者：
G. Peng;Yongcai Qiu;Zhi-hui Liu;Biao Liu;H. Deng
中科院分区：
文献类型：
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作者：
G. Peng;Yongcai Qiu;Zhi-hui Liu;Biao Liu;H. Deng
合成了一系列新的d-f异金属配位框架[LnM（Hbic）2（ox）H2O]·2 H2O [Ln = Nd，M = Cu（1）; Ln = Eu，M = Ag（2）; Ln = Tb，M = Ag（3）; H2 bic = 1H-苯并咪唑-5-羧酸;通过使用不同的金属盐和合理控制反应温度，成功地合成了I型[LnCu（Hbic）3（ox）0.5]·H2O [Ln = Sm（4），Ln = Dy（5）]和III型[LnAg（Hbic）（ox）1.5] [Ln = Eu（6）]。配合物1 - 3代表由镧系元素草酸盐链和M（Hbic）2亚基之间的连接构建的一维聚合链结构。配合物4和5是由镧系元素草酸盐和Cu（Hbic）3单元组装而成的二维层状结构。配合物6显示出另一个二维层状配位框架，该框架由四核Eu 2Ag 2簇和混合ox和Hbic连接体组成。配合物1 - 6的高分子配位框架由氢键和π-π堆积相互作用维持，它们自组装形成了一个有序的配位结构。
A series of new d−f heterometallic coordination frameworks, namely, [LnM(Hbic)2(ox)H2O]·2H2O [Ln = Nd, M = Cu (1); Ln = Eu, M = Ag (2); Ln = Tb, M = Ag (3); H2bic = 1H-benzimidazole-5-carboxylic acid; ox = oxalate] for type I, [LnCu(Hbic)3(ox)0.5]·H2O [Ln = Sm (4), Ln = Dy (5)] for type II, and [LnAg(Hbic)(ox)1.5] [Ln = Eu (6)] for type III, were successfully synthesized by using different metal salts and rationally controlling reaction temperature. Complexes 1−3 represent 1D polymeric chain architectures that are constructed from the connections between lanthanide-oxalate chains and M(Hbic)2 subunits. Complexes 4 and 5 are 2D layered structures which are assembled by lanthanide-oxalate and Cu(Hbic)3 units. Complex 6 exhibits another 2D layered coordination framework that is built up by tetranuclear Eu2Ag2 clusters and mixed ox and Hbic linkers. The polymeric coordination frameworks of complexes 1−6 are sustained by both hydrogen bonding and π−π stacking interactions, and they are self-assembled to form t...