Soft chromophore featured liquid porphyrins and their utilization toward liquid electret applications

Avijit Ghosh, Manabu Yoshida, Kouji Suemori, Hiroaki Isago, Nagao Kobayashi, Yasuhisa Mizutani, Yuki Kurashige, Izuru Kawamura, Masami Nirei, Osamu Yamamuro, Tomohisa Takaya, Koichi Iwata, Akinori Saeki, Kazuhiko Nagura, Shinsuke Ishihara and Takashi Nakanishi ()
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Avijit Ghosh: National Institute for Materials Science (NIMS)
Manabu Yoshida: National Institute of Advanced Industrial Science and Technology (AIST)
Kouji Suemori: National Institute of Advanced Industrial Science and Technology (AIST)
Hiroaki Isago: National Institute for Materials Science (NIMS)
Nagao Kobayashi: Shinshu University
Yasuhisa Mizutani: Osaka University
Yuki Kurashige: Kyoto University, Oiwake-Cho, Kitashirakawa, Sakyo
Izuru Kawamura: Yokohama National University
Masami Nirei: The University of Tokyo
Osamu Yamamuro: The University of Tokyo
Tomohisa Takaya: Gakushuin University
Koichi Iwata: Gakushuin University
Akinori Saeki: Graduate School of Engineering, Osaka University
Kazuhiko Nagura: National Institute for Materials Science (NIMS)
Shinsuke Ishihara: National Institute for Materials Science (NIMS)
Takashi Nakanishi: National Institute for Materials Science (NIMS)

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Optoelectronically active viscous liquids are ideal for fabricating foldable/stretchable electronics owing to their excellent deformability and predictable π-unit–based optoelectronic functions, which are independent of the device shape and geometry. Here we show, unprecedented ‘liquid electret’ devices that exhibit mechanoelectrical and electroacoustic functions, as well as stretchability, have been prepared using solvent-free liquid porphyrins. The fluidic nature of the free-base alkylated-tetraphenylporphyrins was controlled by attaching flexible and bulky branched alkyl chains at different positions. Furthermore, a subtle porphyrin ring distortion that originated from the bulkiness of alkyl chains was observed. Its consequences on the electronic perturbation of the porphyrin-unit were precisely elucidated by spectroscopic techniques and theoretical modelling. This molecular design allows shielding of the porphyrin unit by insulating alkyl chains, which facilitates its corona-charged state for a long period under ambient conditions.

Date: 2019
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DOI: 10.1038/s41467-019-12249-8

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