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| Photophysical properties of mononuclear Cu(I) photovoltaic functional material |
| 1.College of Information and Technology, Jilin Normal University, Siping, Jilin 136000, China; 2.School of Materials Science and Engineering, Jiangsu University, Zhenjiang,Jiangsu 212013, China; 3.Key Laboratory of Preparation and Applications of Environmental Friendly Materials of Ministry of Education, Jilin Normal University, Siping, Jilin 136000, China |
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Abstract A Cu(I) complex of ［Cu(DPEphos)(Dicnq)］BF4 (1) was prepared from ［Cu(CH3CN)4］BF4, bis［2(diphenylphosphino)phenyl］ ether (DPEphos) and 6,7dicyanodipyrido ［2,2d:2′,3′f］quinoxaline (Dicnq) in CH2Cl2 at room temperature. The photophysical and electrochemical properties of 1 were investigated in detail. The results show that the photoluminescent (PL) spectra of 1 in low temperature have a strong dependence on the polarity of solvent and the concentration of 1 in CH2Cl2 solution. With the increase of the solvent polarity and the concentration of 1 in CH2Cl2 solution, the PL spectra demonstrate remarkable redshift. The PL spectra of 1 are dominated by metaltoligand charge transfer transition which is further confirmed by B3LYP level of density functional theory calculations. The Cu(I) complex exhibits excellent thermal stability and relatively short excited lifetime.
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2012, Vol. 33 
