Long-lived room temperature phosphorescence from amorphous non-traditional intrinsic clusteroluminescence polymers. Issue 43 (25th October 2022)

• Record Type: Journal Article
• Authors: Chen, Kang; Wang, Yaling; Chu, Bo; Yan, Zishan; Li, Hairu; Zhang, Haoke; Hu, Shengliang; Yang, Yongzhen; Liu, Bin; Zhang, Xing-Hong
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 43(2022)
• Page Start: 16420
• Page End: 16429
• Publication Date: 2022-10-25
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tc03754h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : The H-bond and ionic bond of the well-defined PSMA hydrolysates induce the TSI-n–π of carbonyl clusters to emit fluorescence and RTP. Abstract : Non-traditional intrinsic clusteroluminescence (CL) polymers with persistent room-temperature phosphorescence (RTP) properties have recently attracted considerable attention owing to the availability of versatile preparation methods and their excellent processability. Herein, a series of poly(styrene- alt -maleic anhydride) (PSMA) hydrolysates with blue fluorescence and green RTP were prepared. The experimental results show that the through-space n–π interaction (TSI-n–π) among intra-/intermolecular carbonyl groups is generated through the induction of hydrogen bonding or ionic bonding, which is the underlying cause of RTP emission. The transition from excitation-dependent emission (EDE) to excitation-independent emission (EIE) with decreasing concentrations indicates that the TSI-n–π of adjacent carbonyls in PSMA-H and hydrolyzed polymaleic anhydride solutions dominates the CL. Theoretical calculations further demonstrate that the phenyl group can induce the aggregation of adjacent carbonyl groups to produce TSI-n–π in the single molecule state, but it does not participate in the carbonyl cluster. This work affords a platform for revealing the nature of CL and TSIs and provides a simple and practical synthetic route for the preparation of RTP materials.