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.

3 - 乙炔基三咪唑并 [1, 2 - a: 1 '，2\ '- c: 1 ″,具有结晶增强特征的 2 ″ - e] [1, 3, 5] 三嗪短期和长期双重排放 ： 氢键和 π - π 相互作用的作用。

• 影响指数: 4.927
• 发表时间: 2024 Apr 25
• 来源期刊: Molecules
• DOI: 10.3390/molecules29091967
• PMID: 38731457
• 文章类型: Journal Article
• 中科院分区: Q3
• 作者列表: Malpicci D,Maver D,Rosadoni E,Colombo A,Lucenti E,Marinotto D,Botta C,Bellina F,Cariati E,Forni A

关键词: crystallization-enhanced emission; dual emission; organic room temperature phosphorescence; supramolecular interactions

Abstract

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.

摘要

具有刺激响应性的有机室温磷光（ORTP）材料，多组分发射行为对于各种应用是非常理想的。用乙炔基官能化的环状三咪唑（TT）的衍生物，TT-CCH,被隔离和调查。该化合物具有结晶增强发射（CEE），包括分子和超分子来源的双重荧光和双重磷光，具有对研磨高度敏感的聚集诱导成分。由于组合的结构，已经披露了排放中涉及的机制，光谱和计算研究。特别是,强CH_N氢键被认为是负责任的，在TT家族里第一次,连同经常观察到的π...π堆叠相互作用，用于聚集的荧光和磷光。