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Hayashi K, Fujimaki Y, Mishiba K, Watanabe H, Imai H. Emergence of practical fluorescence in a confined space of nanoporous silica: significantly enhanced quantum yields of a conjugated molecule. Chem Commun (Camb) 2021; 57:13150-13153. [PMID: 34812452 DOI: 10.1039/d1cc05935a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fluorescence of benzanthrone, which is a conjugated molecule bearing a carbonyl group, is activated by confinement in a pore with a diameter close to the molecular size. An intense emission originating from the aromatic character π-π* transition is achieved through suppression of the nonradiative n-π* transition by strong hydrogen bonding between carbonyl groups and silanol groups with a micropore-filling effect in the nanospace.
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Affiliation(s)
- Kosei Hayashi
- Tokyo Metropolitan Industrial Technology Research Institute (TIRI), 2-4-10 Aomi. Koto-ku, Tokyo, 135-0064, Japan. .,Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Yasuto Fujimaki
- Tokyo Metropolitan Industrial Technology Research Institute (TIRI), 2-4-10 Aomi. Koto-ku, Tokyo, 135-0064, Japan.
| | - Kentaro Mishiba
- Tokyo Metropolitan Industrial Technology Research Institute (TIRI), 2-4-10 Aomi. Koto-ku, Tokyo, 135-0064, Japan.
| | - Hiroto Watanabe
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
| | - Hiroaki Imai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
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