@inproceedings{2ede28ff33fd406e81cfc4a4d04dac6f,
title = "Sodium ion effect on photoinduced electron transfer of porphyrin-crown ether-affixed quaterthiophene-[60]fullerene triad as a gated molecular switch",
abstract = "A porphyrin-quaterthiophene-fullerene triad, in which the center of the quaterthiophene spacer is additionally bridged with a crown ether chain in a sash manner (abbreviated as H2P-(2T(crown)2T)-CM), has been newly synthesized. Photoinduced charge-separation (CS) and charge-recombination processes in the absence and presence of Na+ have been investigated by time-resolved fluorescence and transient absorption spectroscopic methods. Upon photo-excitation of H2P-(2T(crown)2T)-C60 in benzonitrile, CS via 1H2P* generating H 2P*+-2T(crown)2T-C60*- took place, followed by a hole shift to a more energetically stable H 2P-(2T(crown)2T)*+-C60* -. In the presence of Na+, such CS process was completely suppressed by the formation of the Na+-inclusion complex H 2P-(2T(crown-Na+)2T)-C60. Extraction of Na + with the external 15-crown-ether-5 recovered the photoinduced CS process. This result indicates that H2P-(2T(crown)2T)-C60) is an unique photo-switchable system, because (2T(crown)2T) acts as ion-responsible molecular wire. Copyright The Electrochemical Society.",
author = "Yasuyuki Araki and Huimin Zhang and Osamu Ito and Takuro Oike and Tomoyuki Kurata and Kazuo Takimiya and Tetsuo Otsubo and Yoshio Aso",
year = "2006",
doi = "10.1149/1.2408952",
language = "English",
isbn = "9781566775236",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "12",
pages = "51--62",
booktitle = "Fullerenes, Nanotubes, and Carbon Nanostructures",
edition = "12",
note = "209th ECS Meeting ; Conference date: 07-05-2006 Through 12-05-2006",
}