Luminescent Rhenium(I) Phenanthroline Complexes with a Benzoxazol-2-ylidene Ligand: Synthesis, Characterization, and Photophysical Study

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• 作者：Chi-Chiu Ko ; Chi-On Ng ; Shek-Man Yiu
• 刊名：Organometallics
• 出版年：2012
• 出版时间：October 22, 2012
• 年：2012
• 卷：31
• 期：20
• 页码：7074-7084
• 全文大小：479K
• 年卷期：v.31,no.20(October 22, 2012)
• ISSN：1520-6041

文摘

A series of luminescent rhenium(I) phenanthroline complexes containing benzoxazol-2-ylidene ligands with the general formula {Re(CO)₃(phen)[CN(X)C₆H₄-2-O]}⁺ and cis,trans-{Re(CO)₂(phen)(L)[CN(H)C₆H₄-2-O]}⁺ (X = H, methyl; phen = 1,10-phenanthroline; L = PPh₃, PPh₂Me, P(OEt)₃) have been synthesized and characterized. The X-ray crystal structures of most of the carbene complexes and some of their synthetic precursors have also been determined. A new synthetic methodology for the preparation of dicarbonyl rhenium diimine synthetic precursors with a labile acetonitrile ligand, [Re(CO)₂(phen)(PR₃)(MeCN)]⁺, was developed. Photophysical study shows that these carbene complexes display a green to red ³MLLCT [d蟺(Re) 鈫?蟺*(N鈥揘)] phosphorescence at room temperature. The N-deprotonations of the benzoxazol-2-ylidene ligand in these complexes were investigated.