Molecules, Vol. 29, Pages 1967: 3-Ethynyltriimidazo[1,2-a:1 & prime;,2 & prime;-c:1 & Prime;,2 & Prime;-e][1,3,5]triazine Dual Short- and Long-Lived Emissions with Crystallization-Enhanced Feature: Role of Hydrogen Bonds and & pi;- & pi; Interactions

Molecules, Vol. 29, Pages 1967: 3-Ethynyltriimidazo[1,2-a:1′,2′-c:1″,2″-e][1,3,5]triazine Dual Short- and Long-Lived Emissions with Crystallization-Enhanced Feature: Role of Hydrogen Bonds and π-π Interactions Molecules doi: 10.3390/molecules29091967 Authors: Daniele Malpicci Daniele Maver Elisabetta Rosadoni Alessia Colombo Elena Lucenti Daniele Marinotto Chiara Botta Fabio Bellina Elena Cariati Alessandra Forni Organic room temperature phosphorescent (ORTP) materials with stimuli-responsive, multicomponent emissive behaviour are extremely desirable for various applications. The derivative of cyclic triimidazole (TT) functionalized with an ethynyl group, TT-CCH, is isolated and investigated. The compound possesses crystallization-enhanced emission (CEE) comprising dual fluorescence and dual phosphorescence of both molecular and supramolecular origin with aggregation-induced components highly sensitive to grinding. The mechanisms involved in the emissions have been disclosed thanks to combined structural, spectroscopic and computational investigations. In particular, strong CH⋯N hydrogen bonds are deemed responsible, for the first time in the TT family, together with frequently observed π⋯π stacking interactions, for the aggregated fluorescence and phosphorescence.
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research
More News: Chemistry | Organic