TY - JOUR
T1 - Dielectric and Sorption Responses of Hydrogen-Bonding Network of Amorphous C60(OH)12 and C60(OH)36
AU - Uchikawa, Shota
AU - Kawasaki, Ayumi
AU - Hoshino, Norihisa
AU - Takeda, Takashi
AU - Noro, Shin Ichiro
AU - Takahashi, Kiyonori
AU - Nakamura, Takayoshi
AU - Sato, Nozomi
AU - Kokubo, Ken
AU - Sakurai, Hidehiro
AU - Akutagawa, Tomoyuki
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas Kiban Kenkyu (A) (JP19H00886), Japan Science and Technology Agency CREST Grant JPMJCR18I4, and “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials” from the Ministry of Education, Culture, Sports, Science and Technology.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019
Y1 - 2019
N2 - Hydrophilic fullerene derivatives of C60(OH)12 (1) and C60(OH)36 (2) bearing different numbers of -OH groups formed amorphous solids of 1·x(H2O) (x = 5-10) and 2·x(H2O) (x = 15-22), respectively, according to the humidity. The thermally activated dynamic molecular motion of polar H2O was confirmed in the DSC and dielectric spectra. Three-dimensional O-H···O hydrogen-bonding networks in amorphous 1 and 2 produced extrinsic adsorption-desorption pores with a hydrophilic environment posed by -OH groups, where N2, CO2, H2, and CH4 gases vapors and polar H2O, MeOH, and EtOH molecules reversibly adsorbed into the networks. The molecular motion of polar H2O was directly observed in dielectric enhancement and protonic conductivity in three-dimensional O-H···O hydrogen-bonding networks. The Brunauer-Emmett-Teller (BET) specific surface areas of amorphous 1 and 2 were 315 and 351 m2 g-1, respectively, from the CO2 sorption isotherms. Reversible vapor sorption behaviors with structural changes of amorphous 1 and 2 were also confirmed for the polar H2O, MeOH, and EtOH.
AB - Hydrophilic fullerene derivatives of C60(OH)12 (1) and C60(OH)36 (2) bearing different numbers of -OH groups formed amorphous solids of 1·x(H2O) (x = 5-10) and 2·x(H2O) (x = 15-22), respectively, according to the humidity. The thermally activated dynamic molecular motion of polar H2O was confirmed in the DSC and dielectric spectra. Three-dimensional O-H···O hydrogen-bonding networks in amorphous 1 and 2 produced extrinsic adsorption-desorption pores with a hydrophilic environment posed by -OH groups, where N2, CO2, H2, and CH4 gases vapors and polar H2O, MeOH, and EtOH molecules reversibly adsorbed into the networks. The molecular motion of polar H2O was directly observed in dielectric enhancement and protonic conductivity in three-dimensional O-H···O hydrogen-bonding networks. The Brunauer-Emmett-Teller (BET) specific surface areas of amorphous 1 and 2 were 315 and 351 m2 g-1, respectively, from the CO2 sorption isotherms. Reversible vapor sorption behaviors with structural changes of amorphous 1 and 2 were also confirmed for the polar H2O, MeOH, and EtOH.
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U2 - 10.1021/acs.jpcc.9b06951
DO - 10.1021/acs.jpcc.9b06951
M3 - Article
AN - SCOPUS:85073029738
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
ER -