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Originally published in Science Express on 29 April 2004
Science 21 May 2004:
Vol. 304. no. 5674, pp. 1134 - 1137
DOI: 10.1126/science.1096037
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Reports

Infrared Spectroscopic Evidence for Protonated Water Clusters Forming Nanoscale Cages

Mitsuhiko Miyazaki, Asuka Fujii,* Takayuki Ebata, Naohiko Mikami*

Size-dependent development of the hydrogen bond network structure in largesized clusters of protonated water, H+(H2O)n (n = 4 to 27), was probed by infrared spectroscopy of OH stretches. Spectral changes with cluster size demonstrate that the chain structures at small sizes (n 10) develop into two-dimensional net structures (~10 < n < 21), and then into nanometer-scaled cages (n >= 21).

Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.

* To whom correspondence should be addressed. E-mail: asuka{at}qclhp.chem.tohoku.ac.jp (A.F.), nmikami{at}qclhp.chem.tohoku.ac.jp (N.M.)

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