Synthesis and physico-chemical studies of cyclometalated heteroleptic iridium(III) complexes

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• 作者：Jayaraman Jayabharathi ; ^{jtchalam2005@yahoo.co.in} ; Venugopal Thanikachalam ; Natesan Srinivasan ; Karunamoorthy Jayamoorthy
• 关键词：Energy gap law ; 3MLCT&ndash ; 1MLCT ; Iridium(III) complex ; Reichardt&ndash ; Dimroth solvent function ; Marcus solvent function
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2012
• 出版时间：July, 2012
• 年：2012
• 卷：93
• 期：Complete
• 页码：240-244
• 全文大小：498 K

文摘

Phosphorescent studies of 2-arylimidazole heteroleptic cyclometalated iridium(III) complexes with picolinic acid as the ancillary ligand were made. The observed experimental data reveals that these complexes possess dominantly ³MLCT and ³¦Ð-¦Ð* excited states and the solvent shift of these complexes are interpreted by Reichardt-Dimroth and Marcus solvent functions. The results are consistent with prior assignments on the absorption band to a metal-to-ligand charge transfer excited state associated with chelating ligand. Emission kinetic studies exploited that the radiative transition (k_r), increases with increasing ¦Ë_emi.