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Sm(III)‐Bi(III) Heterometallic Complexes with Aminopolycarboxylate Ligand: Structure, Thermal Stability and Spectral Property
Author(s) -
Jiang Qiying,
Deng Hongquan,
He Ping,
Zhong Guoqing,
Yu Kaibei
Publication year - 2011
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201100189
Subject(s) - chemistry , monoclinic crystal system , crystallography , bismuth , crystal structure , thermal decomposition , thermal stability , single crystal , x ray crystallography , diffraction , physics , organic chemistry , optics
Samnium(III)‐bismuth(III) heterobimetallic complexes, SmBi(edta)(NO 3 ) 2 ·7H 2 O ( 1 ) and SmBi(dtpa)(NO 3 )·3.5H 2 O( 2 ) (edta=ethylenediaminetetraacetate, dtpa=diethylenetriaminepentaacetate), were synthesized and characterized by means of X‐ray single crystal diffraction, X‐ray powder diffraction, elemental analysis, ICP, FT‐IR spectra and thermal analysis. The structure analysis revealed that 1 is in crystalline and 2 is in non‐crystal state. Complex 1 crystallizes in monoclinic, space group P 2(1)/ n with a =1.2622(2) nm, b =0.81157(15) nm, c =2.3634(5) nm, β =105.340(2)°, V =2.3347(8) nm 3 , Z =4, D c =2.563 g·cm −3 , µ =10.125 mm −1 . Bridging edta 4− anions between Bi(III) atoms and Sm(III) atoms result into infinite 3D network structure. Thermal decomposition of the two complexes proceeds in similar stages, i.e., dehydration, pyrolysis of ligand, and decomposition of salt, and the final residue is oxide. In addition, the spectral properties have been studied through FL spectra and UV‐Vis DRS. The two complexes exhibit one broad band Bi 6s6p‐6s 2 emission under UV excitation and the characteristic Sm 3+ ion 4 G 5/2 → 6 H J /2 ( J =5, 7, 9, 11) transitions under visible light excitation, respectively.