Highly Efficient Solid-State Phosphorescence of Platinum Dihalide Complexes with 9-Phenyl-9-arsafluorene Ligands

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• 作者：Hiroaki Imoto ; Susumu Tanaka ; Takuji Kato ; Seiji Watase ; Kimihiro Matsukawa ; Takashi Yumura ; Kensuke Naka
• 刊名：Organometallics
• 出版年：2016
• 出版时间：February 8, 2016
• 年：2016
• 卷：35
• 期：3
• 页码：364-369
• 全文大小：386K
• ISSN：1520-6041

文摘

Platinum dihalide (chloride, bromide, and iodide) complexes with 9-phenyl-9-arsafluorene, which can be safely prepared and are air stable, were synthesized. The dibromide and diiodide complexes showed highly efficient phosphorescence even at 298 K in the solid state, and their quantum yields were up to a value of 0.52. The structures of the complexes were analyzed by X-ray crystallography. Time-dependent density functional calculations support our understanding of the initial electron transition processes. The rigid and bulky structure of the arsafluorene backbone effectively induced solid-state phosphorescence unlike that of a triphenylarsine analogue, which has three unbridged phenyl groups.