Volume 128, Issue 42 pp. 13303-13307
Zuschrift

Water Entrapped inside Fullerene Cages: A Potential Probe for Evaluation of Bond Polarization

Yoshifumi Hashikawa

Yoshifumi Hashikawa

Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011 Japan

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Dr. Michihisa Murata

Dr. Michihisa Murata

Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011 Japan

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Prof. Dr. Atsushi Wakamiya

Prof. Dr. Atsushi Wakamiya

Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011 Japan

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Prof. Dr. Yasujiro Murata

Corresponding Author

Prof. Dr. Yasujiro Murata

Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611-0011 Japan

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First published: 06 October 2016
Citations: 6

Abstract

The concept of the bond polarization is a useful tool to understand chemical reactions and fundamental properties of compounds. However, experimental considerations are limited owing to its difficulty of reliable description. We demonstrated that geometrically isolated H2O inside the cage of fullerene C60 is a possible probe to evaluate the polarization degree of covalent bonds C(C60)−X (X=heteroatom) on the C60 cage. The 1H NMR relaxation times of entrapped H2O have been systematically measured at variable temperatures for H2O@C60X (X=CR2, NR, O, and O2). The results followed in the order of electronegativities of C (2.55), N (3.04), and O (3.44), indicating that entrapped H2O can sensitively respond to the degree of the bond polarization.

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