Synthesis and Photophysical Properties of T‐Shaped Coinage‐Metal Complexes. Issue 31 (15th May 2020)

• Record Type: Journal Article
• Authors: Kleinhans, George; Chan, Alan K.‐W.; Leung, Ming‐Yi; Liles, David C.; Fernandes, Manuel A.; Yam, Vivian W.‐W.; Fernández, Israel; Bezuidenhout, Daniela I.
• Is Part Of: Chemistry. Volume 26:Issue 31(2020)
• Page Start: 6993
• Page End: 6998
• Publication Date: 2020-05-15
• Subjects: 1, 2, 3-triazol-5-ylidenes -- absorption and emission properties -- coinage metals -- pincer complexes -- T-shaped geometries; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202000726
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: The photophysical properties of a series of T‐shaped coinage d 10 metal complexes, supported by a bis(mesoionic carbene)carbazolide (CNC) pincer ligand, are explored. The series includes a rare new example of a tridentate T‐shaped Ag I complex. Post‐complexation modification of the Au I complex provides access to a linear cationic Au I complex following ligand alkylation, or the first example of a cationic square planar Au III −F complex from electrophilic attack on the metal centre. Emissions ranging from blue (Cu I ) to orange (Ag I ) are obtained, with variable contributions of thermally‐dependent fluorescence and phosphorescence to the observed photoluminescence. Green emissions are observed for all three gold complexes (neutral T‐shaped Au I, cationic linear Au I and square planar cationic Au III ). The higher quantum yield and longer decay lifetime of the linear gold(I) complex are indicative of increased phosphorescence contribution. Abstract : T‐Shaped coinage‐metal complexes : Photoluminescence tuning mediated by a bis(mesoionic carbene)amido pincer ligand for d 10 complexes of unusual T‐shape, linear Au I and square planar Au III .