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Syntheses, Structures, and Photoluminescence Properties of a Series of 3D Zn‐ Ln Heterometallic Complexes with 2,3‐Pyrazine Dicarboxylic Acid as a Bridging Ligand
Author(s) -
Zhang Hao,
Li Hongfeng,
Chen Peng,
Yan Pengfei
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700392
Subject(s) - isostructural , pyrazine , crystallography , chemistry , molecule , ligand (biochemistry) , photoluminescence , crystal structure , stereochemistry , materials science , biochemistry , receptor , optoelectronics , organic chemistry
A series of 3D d–f heterometallic coordination polymers, {[ Ln 2 Zn(Pzdc) 4 (H 2 O) 6 ] · 2H 2 O} n [ Ln = La ( 1 ), Pr ( 2 ), Nd ( 3 ), Sm ( 4 ), Eu ( 5 ), Gd ( 6 ), Tb ( 7 ), Dy ( 8 )] (H 2 Pzdc = 2,3‐pyrazine dicarboxylic acid), were synthesized by one‐pot reactions under hydrothermal conditions. X‐ray crystallographical analysis and powder X‐ray diffraction analysis reveal that the complexes 1 – 8 are isostructural and adopt a multi‐parallel quadrilateral channel network structure with {4.6 · 2} 2 {4 · 2.6 · 2.8 · 2}{6 · 3}2{6 · 5.8} 2 topology, in which the central Ln III ion is nine‐coordinate by four oxygen atoms and two nitrogen atoms from four ligands and three oxygen atoms from three coordinated H 2 O molecules and the central Zn II ion is six‐coordinate by four oxygen atoms and two nitrogen atoms from four ligands. Moreover, the photophysical properties related to the electronic transition for complexes 4 , 5 , 7 , and 8 were investigated by the excitation and emission spectra as well as the emission lifetimes.