Synthesis, structures and luminescent properties of a series of novel SrII-LnIII (Ln = Eu, Gd, Tb) coordination polymers

Yanmei Chen, Wenqian Chen, Zhenghua Ju, Qian Gao, Tao Lei, Wei Liu, Yahong Li, Dandan Gao, Wu Li

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Eight novel SrII-LnIII heteronuclear coordination polymers based on pyridine-2,6-dicarboxylic acid (H2pda) and imidazole (im) ligands, namely, [LnSr(pda)3(H2O) 5]·Him·H2O (Ln = Eu (1), Gd (2), Tb (3)), [Ln2Sr(pda)6(H2O)5] ·4Him·C2H5OH·nH2O (Ln = Eu (4), n = 5; Gd (5), n = 4), [LnSr(pda)3(H2O) 4]·Him·3H2O (Ln = Gd (6), Tb (7)), and [GdSr(pda)3(H2O)5]·Him·C 2H5OH·3H2O (8), have been prepared by employing different amounts of imidazole. X-ray crystal structure analysis reveals that these compounds exhibit a rich structural chemistry. Complexes 1-3 possess 2-D frameworks. Complexes 4-5, 6-7, and 8 exhibit three types of 1-D chain structure. The structures of the complexes could be rationally tuned via adding different amounts of imidazole. The luminescent properties of these complexes have been investigated. The results show that EuIII and TbIII complexes exhibit intense red and green luminescence emission which are characteristics of TbIII and EuIII, respectively. Solid-state quantum yield and the lifetime of these complexes are also reported.

Original languageEnglish
Pages (from-to)10495-10502
Number of pages8
JournalDalton Transactions
Volume42
Issue number29
DOIs
Publication statusPublished - 2013 Jul 15

ASJC Scopus subject areas

  • Inorganic Chemistry

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