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- Title
Near‐Infrared Emission Beyond 900 nm from Stable Radicals in Nonconjugated Poly(diphenylmethane).
- Authors
Zhang, Ziteng; Xiong, Zuping; Zhang, Jianyu; Chu, Bo; Liu, Xiong; Tu, Weihao; Wang, Lei; Sun, Jing Zhi; Zhang, Chengjian; Zhang, Haoke; Zhang, Xinghong; Tang, Ben Zhong
- Abstract
Organic radicals with narrow energy gaps are highly sought‐after for the production of near‐infrared (NIR) fluorophores. However, the current repertoire of developed organic radicals is notably limited, facing challenges related to stability and low fluorescence efficiency. This study addresses these limitations by achieving stable radicals in nonconjugated poly(diphenylmethane) (PDPM). Notably, PDPM exhibits a well‐balanced structural flexibility and rigidity, resulting in a robust intra‐/inter‐chain through‐space conjugation (TSC). The stable radicals within PDPM, coupled with strong TSC, yield a remarkable full‐spectrum emission spanning from blue to NIR beyond 900 nm. This extensive tunability is achieved through careful adjustments of concentration and excitation wavelength. The findings highlight the efficacy of polymerization in stabilizing radicals and introduce a novel approach for developing nonconjugated NIR emitters based on triphenylmethane subunits.
- Subjects
BAND gaps; RADICALS; FLUOROPHORES; NEAR infrared radiation
- Publication
Angewandte Chemie, 2024, Vol 136, Issue 24, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202403827