Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 41 , Issue 5
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  • Katsumi Kaneko, Tsutomu Itoh, Toshihiko Fujimori
    2012 Volume 41 Issue 5 Pages 466-475
    Published: May 05, 2012
    Released: April 28, 2012
    JOURNALS OPEN ACCESS
    Confinement of molecules in nanoscale pores of an interfacial solid such as single wall carbon nanotubes of which all component carbon atoms are exposed to the interface with gas phase induces collective phenomena; the confinement effect is interpreted by the interaction potential theory. The nanoconfinement effect gives rise to in-pore phase anomalies for NO, H2O, CCl4, superhigh-pressure effect, hydrophobic to hydrophilic transformation for carbon, and a marked quantum molecular sieving. The confinement of KI in the nanotube space below 0.1 MPa produces high-pressure-phase KI above 1.9 GPa. Water molecules gain hydrophilicity with cluster formation in order to accommodate in the hydrophobic carbon spaces. The subnanometer quantum fluctuation for H2 and D2 gives rise to a marked quantum molecular sieving effect in nanoscale pores. The Cu-based porous coordination polymer crystals can detect the surrounding stimuli such as CO2 pressure change to vary the crystal lattice, accompanying gate adsorption.
    Molecules in nanoscale pores of the interfacial solid such as single wall carbon nanotube of which all component carbon atoms are exposed to the interfaces with gas phase show collective behavior, depending on the nanostructure. Confinement of molecules in nanoscale pores leads to stabilization of low-temperature phase and superhigh-pressure effect. Water molecules are adapted to hydrophobic nanopore spaces through cluster formation. The quantum fluctuation of H2 and D2 gives rise to a marked quantum molecular sieving effect. The Cu-based porous coordination polymer crystals can aspire CO2 repeatedly without the collapse of the crystal lattice. Fullsize Image
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