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Efficient Triplet-Triplet Annihilation Upconversion in Solution and Hydrogel Enabled by an S-T Absorption Os(II) Complex Dyad with an Elongated Triplet Lifetime.
Wei, Yaxiong; Li, Yuanming; Li, Zefeng; Xu, Xinsheng; Cao, Xiaosong; Zhou, Xiaoguo; Yang, Chuluo.
Afiliação
  • Wei Y; Shenzhen Key Laboratory of Special Functional Materials, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
  • Li Y; School of Physics and Electronic Information, Anhui Normal University, Wuhu, Anhui 241000, China.
  • Li Z; Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
  • Xu X; Shenzhen Key Laboratory of Special Functional Materials, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
  • Cao X; School of Physics and Electronic Information, Anhui Normal University, Wuhu, Anhui 241000, China.
  • Zhou X; Shenzhen Key Laboratory of Special Functional Materials, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
  • Yang C; Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
Inorg Chem ; 60(24): 19001-19008, 2021 Dec 20.
Article em En | MEDLINE | ID: mdl-34886665
ABSTRACT
A new Os(II) complex dyad featuring direct singlet-to-triplet (S-T) absorption and intramolecular triplet energy transfer (ITET) with lifetime up to 7.0 µs was designed to enhance triplet energy transfer efficiency during triplet-triplet annihilation upconversion (TTA-UC). By pairing with 9,10-bis(phenylethynyl)anthracene (BPEA) as a triplet acceptor, intense upconverted green emission in deaerated solution was observed with unprecedented TTA-UC emission efficiency up to 26.3% (with a theoretical maximum efficiency of 100%) under photoexcitation in the first biological transparency window (650-900 nm). Meanwhile, a 7.1% TTA-UC emission efficiency was acquired in an air-saturated hydrogel containing the photosensitizer and a newly designed hydrophilic BPEA derivative. This ITET mechanism would inspire further development of a highly efficient TTA-UC system for biological fields and renewable energy production.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article