Lanthanide contraction and anions-controlled dimensional diversity in Ln-Cu-NTA (Ln = lanthanide, H3NTA = nitrilotriacetic acid) coordination polymers:: crystal structure and magnetic properties

被引：45

作者：

Liu, QD

Gao, S ^{[1
]}

Li, JR

Ma, BQ

Zhou, QZ

Yu, KB

机构：

[1] Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China

[2] Peking Univ, Coll Chem & Mol Engn, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, Beijing 100871, Peoples R China

[3] Acad Sinica, Chengdu Ctr Anal & Measurement, Chengdu 610041, Peoples R China

来源：

POLYHEDRON | 2002年 / 21卷 / 11期

基金：

中国国家自然科学基金;

关键词：

lanthanide contraction; anion controlled assembly; crystal structures; magnetic properties;

D O I：

10.1016/S0277-5387(02)00911-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of lanthanide-copper coordination polymers with nitrilotriacetic acid (H(3)NTA) were synthesized as [LnCuCl(NTA)(H2O)(6)]ClO4 . H2O [Ln = La (1), Ce (2), Pr (3), Gd (4, 4'), Tb (5) and Dy (6)] and [LnCuCl(NTA)(H2O6]ClO4 . 3H(2)O [Ln=Ho (7), Er (8), Tm(9), Lu (10) and Y (11)] in aqueous solution. The crystal structures of 1, 4, 4', 8, 11 were determined and isomorphous relationships of the others identified. They turned out to be diverse, ranging from a two-dimensional (2D) array for I to one-dimensional (1D) chains of three different types (2-4, 4'-6, and 7-11), as controlled by lanthanide contraction and mixed anions Cl- and ClO4-, which were found to play a crucial role in the formation and stabilization of this series of LnCu polymers. Temperature-dependent magnetic susceptibilities for 1, 3, 4, 5 and 8 were studied. I shows a weak ferromagnetic-like behavior, whereas the others exhibit an overall antiferromagnetic feature. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1097 / 1103

页数：7

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