High‐Temperature and Dynamic RGB (Red‐Green‐Blue) Long‐Persistent Luminescence in an Anti‐Kasha Organic Compound. Issue 32 (24th June 2022)

• Record Type: Journal Article
• Authors: Zhang, Qiang‐Sheng; Wang, Shi‐Cheng; Xiong, Xiao‐Hong; Fu, Peng‐Yan; Zhang, Xiao‐Dong; Fan, Ya‐Nan; Pan, Mei
• Is Part Of: Angewandte Chemie international edition. Volume 61:Issue 32(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-24
• Subjects: anti-Kasha's Rule -- High-Temperature Afterglow -- Long-Persistent Luminescence -- Multistage Stimulus-Response -- Photo and Thermal Modulation; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202205556
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Organic LPL (long‐persistent luminescence) materials have sparked extensive research interest due to the ultralong‐lived triplet states. Although numerous organic LPL materials have been reported, most of the triplet emission was static and monotonous. Therefore, LPL materials with dynamic triplet emission are urgently required. A triamino‐ s ‐triazine derivative 1 with dynamic LPL was fabricated. The single‐crystal structure shows that the abundant intermolecular interactions and small free volume restrict the molecular motion and avoid the quenchers. Spectral and theoretical calculations upheld the existence of multiple excited states in 1, and the migration of electrons between multiple excited states is very sensitive to external stimuli. By modulating the stimulus, the residence of electrons in different triplet states can be manipulated to achieve RGB LPL. Importantly, blue LPL was achieved by manipulating the anti‐Kasha emission. And the red LPL can still be observed at high temperature. Abstract : A novel organic ultra‐long persistence luminescent material with dynamic RGB‐tunable and high‐temperature long‐persistent luminescence (LPL) based on a triamino‐ s ‐triazine derivative was designed and prepared for information encryption and decryption.