Self-Assembly of Discrete M6L8 Coordination Cages Based on a Conformationally Flexible Tripodal Phosphoric Triamide Ligand

被引：88

作者：

Li, Xing-Jun ^{[1
,2
]}

Jiang, Fei-Long ^{[1
]}

Wu, Ming-Yan ^{[1
]}

Zhang, Shu-Quan ^{[1
]}

Zhou, You-Fu ^{[1
]}

Hong, Mao-Chun ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

INORGANIC CHEMISTRY | 2012年 / 51卷 / 07期

基金：

美国国家科学基金会;

关键词：

METAL-ORGANIC FRAMEWORKS; AROMATIC POLYCARBOXYLATE; OCTAHEDRAL NANOCAGES; DRIVEN; HOST; ENCAPSULATION; RECOGNITION; SEPARATION; REACTIVITY; POLYHEDRA;

D O I：

10.1021/ic202373a

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reactions of a tripodal ligand, N,N',N ''-tris(3-pyridinyl)phosphoric triamide (TPPA), and a series of transition-metal ions result in the assembly of five discrete M6L8 coordination cages [M-6(TPPA)(8)(H2O)(12)]-(ClO4)(12)center dot 57H(2)O [M = Ni2+ (1), Co2+ (2), Zn2+ (3), Cd2+ (4)] and [Pd-6(TPPA)(8)]Cl-12 center dot 22H(2)O (5). X-ray structural analyses reveal that the cages have large internal cavities and flexible windows. The flexible ligand TPPA adopts the syn conformation in cages 1-4, but it transforms to the anti conformation in cage S. Because of the conformational transformation, the sizes of the windows and the volume of the internal cavity of cage 5 are increased. H-1 NMR and electrospray mass spectrometric studies show that cage 5 maintains its structural integrity in solution. Additionally, compounds 3 and 4 exhibit strong blue fluorescent emissions, which are 1 order of magnitude higher than that of the free ligand.

引用

页码：4116 / 4122

页数：7

共 64 条

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