Laboratory for Chemistry and Life Science, Institute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
Department of Chemical Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
Present address: Department of Applied Chemistry Graduate School of Engineering Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
International Institute for Carbon-Neutral Energy Research, (WPI-I2CNER) Kyushu University 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
Waseda Research Institute for Science and Engineering Waseda University Tokyo 169-8555 Japan
Present address: Information and Media Center Toyohashi University of Technology 1-1 Hibarigaoka, Tempaku-cho Toyohashi Aichi 441-8580 Japan
Department of Chemistry Faculty of Science and Technology Keio University Yokohama 223-8522 Japan
Institut für Physik and IRIS Adlershof Humboldt-Universität zu Berlin Berlin 12489 Germany
Department of Chemistry and Biochemistry School of Advanced Science and Engineering Waseda University Tokyo 169-8555 Japan
Blue/orange dual fluorescence properties of tetramesityldiborane(4) are reported by Yoshiaki Shoji, Yasuhiro Ikabata et al. in their Research Article (DOI: 10.1002/anie.202113549). Theoretical calculations showed that the diborane(4) in the S1 state adopts a twisted or planar geometry, which is responsible for the blue or orange fluorescence, respectively. The relative intensity of the dual fluorescence is sensitive to the viscosity of the medium, highlighting the potential of the diborane(4) as a ratiometric viscosity sensor.
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