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INFRARED SPECTRA OF DEUTERATED ISOTOPOMERS ISOLATED IN $H_{2}O$ CLATHRATES

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Title: INFRARED SPECTRA OF DEUTERATED ISOTOPOMERS ISOLATED IN $H_{2}O$ CLATHRATES
Creators: Richardson, H. H.; Wooldridge, Paul J.; Devlin, J. Paul
Issue Date: 1984
Abstract: A reliable procedure for the preparation of clathrate hydrates as low-temperature thin films was recently $described^{1}$. Amorphous films, prepared with the proper host-guest molar ratios by codepostion at $T < 80K$,crystallize to the hydrate at temperatures in the 110-125 K range. This procedure permits the incorporation of intact deuterated isotopomers either as part of the host lattice, i. e. $D_{2}O$, or as caged guest molecules, eg. $D_{2}S$ in an $H_{2}O$ latttice. This ability to trap intact isotopomers opens up two areas of investigation: 1) the dynamics of molecules isotopically decoupled in the clathrate stucture (host or guest) and 2) the kinetics of proton exchange as evidenced by the conversion of intact isotopomers to isotopically mixed molecular species. In particular, the vibrational spectrum of $D_{2}O$ isolated in the $H_{2}O$ ethylene oxide clathrate has been measured for comparison with the corresponding crystalline ice $I_{C}$ data and the spectra of both $H_{2}S$, and $D_{2}S$, as guests in the two sizes of type I clathrate cages, have been obtained.
URI: http://hdl.handle.net/1811/16825
Other Identifiers: 1984-TG-7
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