Heteroleptic platinum(<scp>ii</scp>) NHC complexes with a C^C* cyclometalated ligand – synthesis, structure and photophysics
作者:Alexander Tronnier、Ute Heinemeyer、Stefan Metz、Gerhard Wagenblast、Ingo Muenster、Thomas Strassner
DOI:10.1039/c4tc02575j
日期:——
Platinum(II) complexes [(NHC)Pt(L)] with various β-diketonate based auxiliary ligands (L: 3-meacac = 3-methylacetylacetonato, dpm = dipivaloylmethanato, dbm = dibenzoylmethanato, mesacac = dimesitoylmethanato, duratron = bis(2,3,5,6-tetramethylbenzoyl)methanato) and a C^C* cyclometalated N-heterocyclic carbene ligand (NHC: dpbic = 1,3-diphenylbenzo[d]imidazol-2-ylidene, dpnac = 1,3-diphenylnaphtho[2
铂(II)配合物[(NHC)Pt(L)]与各种基于β-二酮酸酯的辅助配体(L:3-meacac = 3-甲基乙酰基丙酮酸,dpm =二戊酰基甲酰氨基,dbm =二苯甲酰基甲酰氨基,mesacac =二甲磺酰基甲酰基,duratron = bis(2 ,3,5,6-四甲基苯甲酰基)甲氨基)和C ^ C *环金属化的N-杂环卡宾配体(NHC:dpbic = 1,3-二苯基苯并[ d ]咪唑-2-亚基,dpnac = 1,3-二苯基萘[发现2,3 - d ]咪唑-2-亚基或bnbic = 1-苯基-3-苄基苯并[ d ]咪唑-2-亚基显示出不同的聚集和光物理性质,这取决于辅助配体。用银制备了八种配合物(I)–通过重金属化,环金属化以及随后用叔丁醇钾和β-二酮处理的NHC中间体。它们通过包括195种在内的标准技术得以充分表征Pt NMR。另外还通过2D NMR光谱(COSY,HSQC,HMBC和N