Proton-Sensitive Luminescent Ruthenium(II) Complexes with Pyrazine-Based Pincer-Type N-Heterocyclic Carbene Ligands

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• 作者：Chen-Shiang Lee ; Rui Rui Zhuang ; Ju-Chun Wang ; Wen-Shu Hwang ; Ivan J. B. Lin
• 刊名：Organometallics
• 出版年：2012
• 出版时间：July 23, 2012
• 年：2012
• 卷：31
• 期：14
• 页码：4980-4987
• 全文大小：385K
• 年卷期：v.31,no.14(July 23, 2012)
• ISSN：1520-6041

文摘

New Ru(II) complexes with pyrazine-based pincer-type N-heterocyclic carbene ligands [(^RCPC^R)₂Ru]X₂ (^RCPC^R = 2,6-bis(alkylimidazol-2-ylidene)pyrazine; R = Me and n-Bu; X = Cl and PF₆) were synthesized and fully characterized. X-ray structure determinations revealed that complexes [(^nBuCPC^nBu)₂Ru]Cl₂, [(^MeCPC^Me)₂Ru][PF₆]₂, and [(^nBuCPC^nBu)₂Ru][PF₆]₂ have pseudo-octahedral configurations around the Ru(II) center with the two pincer ligands in the core structure. Protonation and methylation of the noncoordinated pyrazine nitrogen atom of the complexes resulted in dramatic variation of both absorption and emission spectrum.