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Citation: Hu Guo-Hang, Ruan Wen-Juan, Zhang Yu-Ling, Han Hua, Zhu Zhi-Ang. Study on Spectra Properties of Chiral Dinuclear Salen Complex[J]. Acta Physico-Chimica Sinica, ;2003, 19(04): 320-325. doi: 10.3866/PKU.WHXB20030408 shu

Study on Spectra Properties of Chiral Dinuclear Salen Complex

1.
Department of chemistry, Nankai University, Tianjin　300071

Received Date: 15 July 2002
Available Online: 15 April 2003

Four novel chiral dinuclear Salen complexes [(Cu)2L•H2O(2), (Ni)2L(3), (Zn)2L•H2O(4), (MnCl)2L•2H2O(5)] have been synthesized (L is chiral dimeric Salen ligand which is synthesized from (R, R)-diaminocyclohexane, 3,5-di-tert-butyl salicylaldehyde, 5,5′-methylene-di-salicylaldehyde). These ligands and complexes were characterized by elemental analysis, 1H NMR, UV-Vis, FT-IR, CD spectra. The UV-Vis spectra were compared with those of monomeric Salen ligand and complex. It was found that the position and shape of absorption band are similar to those of the corresponding monomeric compounds, but the values of the absorption peak(ε) are approximately two folds larger. Furthermore Cotton effect and Cotton split of CD spectra of these chiral compounds were explained by the exciton interaction theory. It seemed that the direction of Cotton split depend on the configuration of diaminocyclohexane. (R, R)-diaminocyclohexane termined the chirality of Salen compounds as negative, and the positive and negative component of Cotton split lie at higher and lower energy respectively.
- Chiral Salen(N,N′-bis-(salicylaldehyde) ethylenediimine)] ligands;　Dinuclear Salen complexes;Spectra properties
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