Solid state water at room temperature in kanemite and Zeolite A

COLL 470

Alan Benesi1, Bernie O'Hare1, Michael W. Grutzeck2, Seong H. Kim, shkim@engr.psu.edu3, and David B. Asay, dba111@psu.edu3. (1) Chemistry Department, Penn State University, University Park, PA 16802, (2) Materials Research Institute, Pennsylvania State University, University Park, PA 16802, (3) Department of Chemical Engineering, The Pennsylvania State University, 3 Fenske Lab, University Park, PA 16802
We have used deuterium NMR T1 relaxation data and transmission FT-IR to show that solid state water exists in kanemite and in hydrated Zeolite A at room temperature. The NMR data for the planar silicate kanemite are well matched with a solid state tetrahedral jump model like that used to explain temperature dependent 2H and 1H powder spectra in ice Ih below the freezing point. The NMR data for Zeolite A are well matched by a model in which a given H nucleus experiences rapid local tetrahedral jumps and longer term pseudoisotropic rotational diffusion due to the approximately spherical geometry of the pores.
 

Water at Interfaces
8:30 AM-11:40 AM, Wednesday, 13 September 2006 Sir Francis Drake -- Tudor Room, Oral

Division of Colloid & Surface Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006