杂原子
聚酯纤维
桥接(联网)
材料科学
近红外光谱
光化学
含时密度泛函理论
纳米技术
光电子学
分子
化学
有机化学
荧光
光学
计算机科学
物理
戒指(化学)
计算机网络
复合材料
作者
Li Xiong,Bo Chu,Zuping Xiong,Bin Liu,Wei Tu,Ziteng Zhang,Haoke Zhang,Jing Sun,Xinghong Zhang,Ben Zhong Tang
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:11 (6): 1579-1587
被引量:2
摘要
Making nonconjugated polymers to emit visible light remains a formidable challenge, let alone near-infrared (NIR) light, although NIR luminophores have many advanced applications. Herein, we propose an electron-bridging strategy of using heteroatoms (O, N, and S) to achieve tunable emission from blue to NIR regions (440-800 nm) in nonconjugated polyesters. Especially, sulfur-containing polyester P4 exhibits NIR clusteroluminescence (CL) on changing either the concentration or excitation wavelength. Experimental characterization and theoretical calculation demonstrate that the introduction of heteroatoms significantly enhances the through-space interactions (TSIs) via the electron-bridging effect between heteroatoms and carbonyls. The strength of the electron-bridging effect follows the order of S > N > O, based on two synergistic effects: electronic structure and van der Waals radius of heteroatoms. This work provides a low-cost, scalable platform to produce new-generation nonconjugated luminophores with deeper insight into the photophysical mechanism.
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