9,9-Dimethylxanthene Derivatives: New RTP Family Member and the Adjustable Performance through Substituent Effect.

9,9-Dimethylxanthene Derivatives: New RTP Family Member and the Adjustable Performance through Substituent Effect.
Angew Chem Int Ed Engl. 2020 Jan 15;:
Authors: Li Z
Abstract
Room temperature phosphorescence (RTP) emitters with ultralong lifetime are emerging as attractive concern due to the potential applications in bioimaging, security and other areas. But their development is limited by ambiguous mechanism and unregulated RTP property with molecular design. In this text, with the incorporation of different substituents to 9,9-dimethylxanthene core, RTP lifetime of resultant compounds can increase from 52 to 601 ms by the tunable intermolecular interactions and molecular configurations. The most persistent RTP of compound XCO-PiCl is mainly due to the little steric hindrance and multiple sites of 1-chloro-2-methylpropan-2-yl moiety to form the strong intermolecular interactions in the aggregated states, which can be applied into bioimaging. This substituent effect afforded an efficient strategy to molecular design of organic RTP materials with the deep understanding of the relationship among molecular structures, intermolecular interactions and RTP property.
PMID: 31944514 [PubMed - as supplied by publisher]

Source: Angewandte Chemie - January 14, 2020 Category: Chemistry Authors: Li Z Tags: Angew Chem Int Ed Engl Source Type: research