Synthesis, Structure and Properties of Three-dimensional Gd(Ⅲ), Eu(Ⅲ) Coordination Polymers via in situ Decarboxylation

Chemical Research in Chinese Universities ›› 2009, Vol. 25 ›› Issue (5): 614-619.

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Synthesis, Structure and Properties of Three-dimensional Gd(Ⅲ), Eu(Ⅲ) Coordination Polymers via in situ Decarboxylation

WANG Chuan-sheng, GU Xiao-fu, SUN Ya-guang^*, GAO En-jun and ZHANG Wan-zhong

Laboratory of Coordination Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142, P. R. China

Received:2008-12-10 Revised:2009-04-07 Online:2009-09-25 Published:2009-12-07
Contact: SUN Ya-guang, E-mail: yaguangsun@yahoo.com.cn
Supported by:
Supported by the Education Department Science Foundation of Liaoning Province(No.2008581), the Doctor Foundation of Liaoning Province(No.20071016), SRF for ROCS, SEM(No.200908) and Liaoning BaiQianWan Talents Program.

Abstract

Abstract:

Two three-dimensional lanthanide(III) coordination polymers with the formula [Ln(PYDC)(NA)(H₂O)]_n [Ln=Gd(1), Eu(2), H2PYDC=pyridine-2,5-bicarboxylic acid, HNA=nicotinic acid] have been hydrothermally synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction. The NA came from in situ decarboxylation of the part of PYDC. X-ray single crystal structural analyses reveal that complexes 1 and 2 are isomorphous, they possess the 4³·6³ topology assembled by Gd³⁺/Eu³⁺ and two different multidentate carboxylate ligands. Magnetic measurements show that antiferromagnetic coupling exists between adjacent Gd³⁺ ions in complex 1. The complex 2 exhibits the corresponding characteristic luminescence in the visible region under an excitation at 305 nm.

Key words: Coordination polymer; Decarboxylation; Luminescence; Magnetic property

WANG Chuan-sheng, GU Xiao-fu, SUN Ya-guang*, GAO En-jun and ZHANG Wan-zhong. Synthesis, Structure and Properties of Three-dimensional Gd(Ⅲ), Eu(Ⅲ) Coordination Polymers via in situ Decarboxylation[J]. Chemical Research in Chinese Universities, 2009, 25(5): 614-619.

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Synthesis, Structure and Properties of Three-dimensional Gd(Ⅲ), Eu(Ⅲ) Coordination Polymers via in situ Decarboxylation

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