Ultralong Room Temperature Phosphorescence Emission From Gels Induced by Multiple Confinement Effects

IF 9.8 1区物理与天体物理 Q1 OPTICS Laser & Photonics Reviews Pub Date : 2024-10-25 DOI:10.1002/lpor.202400997

Changchang Bo, Tingting Li, Qinglong Jia, Wensheng Xu, Ligong Chen, Yang Li, Xilong Yan, Bowei Wang

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Abstract

The construction of ultra-long room temperature phosphorescence (RTP) gels has always been a serious challenge because the dispersing medium would significantly deteriorate their rigidity, resulting in triplet excitons consumption by non-radiative transitions. In this paper, eutectogel with ultra-long RTP emission is successfully constructed by rebuilding the damaged rigid system with solvent exchange. Specifically, the formation of cyclic borate via the B─O click reaction between 1,3,5-tris(4-phenylboronic acid)benzene (TPPB) and poly(vinyl alcohol) (PVA) matrix is demonstrated to be favorable for RTP emission, with the resulting films possessing an afterglow duration of 26 s and a lifetime of up to 2.92 s. Based on this, deep eutectic solvents (DES)-based RTP gel is successfully prepared by cyclic freezing-thawing and solvent exchange of aqueous solution of TPPB functionalized PVA obtained by click reaction. The obtained gel exhibited an afterglow of up to 8 s and RTP lifetime of 902 ms under ambient conditions. Further analyses showed that the introduction of DES reconstructed interactions between polymer chains damaged by water and enhanced the rigidity of the system, thus promoting RTP emission.

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多重约束效应诱导凝胶的超长室温磷光发射

超长室温磷光凝胶（RTP）的构建一直是一个严峻的挑战，因为分散介质会大大降低其刚性，导致三重激子在非辐射跃迁中消耗。本文通过溶剂交换重建受损的刚性体系，成功构建了具有超长 RTP 发射的共晶凝胶。具体来说，1,3,5-三（4-苯基硼酸）苯（TPPB）与聚乙烯醇（PVA）基质之间通过 B─O 点击反应形成的环硼酸酯被证明有利于 RTP 发射，所生成的薄膜具有 26 秒的余辉持续时间和长达 2.92 秒的寿命。在此基础上，通过对点击反应得到的 TPPB 功能化 PVA 水溶液进行循环冷冻-解冻和溶剂交换，成功制备了基于深共晶溶剂（DES）的 RTP 凝胶。在环境条件下，所获得的凝胶显示出长达 8 秒的余辉和 902 毫秒的 RTP 寿命。进一步的分析表明，DES 的引入重建了被水破坏的聚合物链之间的相互作用，增强了系统的刚性，从而促进了 RTP 发射。

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来源期刊

Laser & Photonics Reviews 物理-光学

CiteScore

14.20

自引率

5.50%

发文量

314

审稿时长

2 months

期刊介绍： Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.