期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 123, 期 38, 页码 23545-23553出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.9b06951
关键词
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资金
- Japan Science and Technology Agency CREST Grant [JPMJCR18I4]
- Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials from the Ministry of Education, Culture, Sports, Science and Technology
- [JP19H00886]
Hydrophilic fullerene derivatives of C-60(OH)(12) (1) and C-60(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 center dot center dot center dot O hydrogen-bonding networks in amorphous 1 and 2 produced extrinsic adsorption-desorption pores with a hydrophilic environment posed by -OH groups, where N-2, CO2, H-2, 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 center dot center dot center dot O hydrogen-bonding networks. The Brunauer-Emmett-Teller (BET) specific surface areas of amorphous 1 and 2 were 315 and 351 m(2) 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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