Issue 19, 2006
From the journal:

Dalton Transactions

Silver nitrate in silver zeolite A: three-dimensional incommensurate guest ordering in a zeolite framework†

M. Viertelhaus,a   A. E. Taylor,a   L. Kloo,b   I. Gamesona  and  P. A. Anderson*a  

* Corresponding authors

a School of Chemistry, University of Birmingham, Edgbaston, Birmingham, UK
E-mail: p.a.anderson@bham.ac.uk
Fax: +44 121 414 4442
Tel: +44 121 414 4447

b Department of Chemistry, Royal Institute of Technology, Stockholm, Sweden

Abstract

We report the results of a detailed examination of the occlusion of silver nitrate in silver zeolite A (AgA). The superlattice reported to occur in (AgNO3)9–AgA was found to melt at between 80 and 100 °C on heating and reappear when the sample was cooled down to 80 °C. Annealing in this temperature range and rigorous exclusion of water produced an enhancement of the superlattice peaks, which results from ordering of the contents of the zeolite cages. Peaks assigned to the superlattice were indexed with the tetragonal lattice parameters a = 17.440(5) and c = 12.398(4) Å and proposed space group P4/nmm. The sharp peaks representing the lattice of the framework (a = 12.3711(5) Å, Pm[3 with combining macron]m) remained largely unaffected by the guest in this compound, which was found to exhibit strong negative thermal expansion. The host and guest lattices are incommensurate with the tetragonal guest lattice being slightly larger than the cubic host in the c-direction and slightly smaller in the a- and b-directions.

Graphical abstract: Silver nitrate in silver zeolite A: three-dimensional incommensurate guest ordering in a zeolite framework

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Article information

DOI
https://doi.org/10.1039/B517094J
Article type
Paper
Submitted
02 Dec 2005
Accepted
20 Feb 2006
First published
13 Mar 2006

Dalton Trans., 2006, 2368-2373

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Silver nitrate in silver zeolite A: three-dimensional incommensurate guest ordering in a zeolite framework

M. Viertelhaus, A. E. Taylor, L. Kloo, I. Gameson and P. A. Anderson, Dalton Trans., 2006, 2368 DOI: 10.1039/B517094J

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