| 光谱学与光谱分析 |
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| Relation between Complexes Iotramolecular Transfer and Structure of [M(SS)(NN)](M=Zn2+, Cd2+) |
| PAN Qing-cai1,ZHAO Yong-he1,SHEN Hong-qi1,YAN Feng-mei1,LI Wei1, PENG Zheng-he2 |
1. Department of Chemistry and Chemical Engineering, Huanghuai University, Zhumadian 463000, China
2. College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China |
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Abstract The title complexes of [M(SS)(NN)](M=Zn2+, Cd2+; SS=1,2-dicyano 1,2-ethylene -dithiolate or maleonitriledithiolate; NN=5-nitro-1,10 phenanthroline) were synthesized. The electronic absorption spectra of complexes [M(SS)(NN)] in DMSO, DMF, acetone and Py were reported. The spectra absorption bands 270-280 nm, 320-350 nm and 350-390 nm are the intraligand πb→π* transfer of ligand mnt2- and 5-NO2-phen. The spectra absorption band 400-500 nm is intramolecular charge transfer (LL′CT) from a ligand (mnt2-) to another ligand (5-NO2- phen) The relation between electronic spectra absorption band and correlative transition in the molecular orbital energy level diagram of the complexes was investigated. The LL′CT band of the title complexes is weaker by comparison with M(SS)(NN)(M=Co2+,Fe2+,Ni2+ and Cu2+). The LL′CT band of [M(SS)(NN)](M=Zn2+, Cd2+) (7b2 to 7b1) is symmetry forbidden.
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Received: 2006-04-04
Accepted: 2006-07-23
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Corresponding Authors:
PAN Qing-cai
E-mail: panqc2004@yahoo.com.cn
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