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Host-Guest Systems in Microporous Carbons

Published online by Cambridge University Press:  10 February 2011

Toshiaki Enoki ,
Kazuyuki Takai ,
Yoshiyuki Shibayama ,
Norikazu Kobayashi ,
Atsuko Nakayama ,
Hirohiko Sato ,
Naohiko Yoshida  and
Hidekazu Touhara
Toshiaki Enoki
Affiliation:
Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152- 8551, Japan
Kazuyuki Takai
Affiliation:
Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152- 8551, Japan
Yoshiyuki Shibayama
Affiliation:
Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152- 8551, Japan
Norikazu Kobayashi
Affiliation:
Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152- 8551, Japan
Atsuko Nakayama
Affiliation:
Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152- 8551, Japan
Hirohiko Sato
Affiliation:
Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152- 8551, Japan
Naohiko Yoshida
Affiliation:
Department of Chemistry, Faculty of Textile Science and Technology, Shinshu University, Ueda 386–8567, Japan
Hidekazu Touhara
Affiliation:
Department of Chemistry, Faculty of Textile Science and Technology, Shinshu University, Ueda 386–8567, Japan
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Abstract

Microporous activated carbon fibers (ACF) having huge specific surface areas are characterized as a three-dimensional network of nano-sized graphite domains. We investigate ACF-hosting host-guest systems aiming at novel phenomena produced by the host-guest interface interactions. An extraordinarily large amount of helium is condensed in the ACF micropores, suggesting the presence of ultra-micropores and the enhancement in the helium- nano-graphite interaction. Chemisorbed oxygen molecules are stabilized in the singlet states caused by the interaction with nano-graphite and it makes the micorpore volume swell. Iodine forms an intercalation system with nano-graphites through charge transfer process, in contrast with the behavior of bulk graphite that does not accept iodine as an acceptor-type intercalate. Fluorine reacting with nano-graphite generates dangling bond spins by breaking graphite π- bonds, where the fluorine-induced defect is found to have a widely extended electronic structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 3
Copyright
Copyright © Materials Research Society 1999

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References

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