High-Throughput and Time-Resolved Energy-Dispersive X-Ray Diffraction (EDXRD) Study of the Formation of CAU-1-(OH)(2) : Microwave and Conventional Heating

Ahnfeldt, T., Moellmer, J., Guillerm, V., Staudt, R., Serre, C. and Stock, N. (2011) High-Throughput and Time-Resolved Energy-Dispersive X-Ray Diffraction (EDXRD) Study of the Formation of CAU-1-(OH)(2) : Microwave and Conventional Heating Chemistry, 17 (23). pp. 6462-8. DOI 10.1002/chem.201003708.

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Abstract

Aluminium dihydroxyterephthalate Al(8) (OH)(4) (OCH(3) )(8) (BDC(OH)(2) )(6) x H(2) O (denoted CAU-1-(OH)(2) ) was synthesized under solvothermal conditions and characterized by X-ray powder diffraction, IR spectroscopy, sorption measurements, as well as thermogravimetric and elemental analysis. CAU-1-(OH)(2) is isoreticular to CAU-1 and its pores are lined with OH groups. It is stable under ambient conditions and in water, and it exhibits permanent porosity and two types of cavities with effective diameters of approximately 1 and 0.45 nm. The crystallization of CAU-1-(OH)(2) was studied by in situ energy-dispersive X-ray diffraction (EDXRD) experiments in the 120-145 degrees C temperature range. Two heating methods-conventional and microwave-were investigated. The latter leads to shorter induction periods as well as shorter reaction times. Whereas CAU-1-(OH)(2) is formed at all investigated temperatures using conventional heating, it is only observed below 130 degrees C using microwave heating. The calculation of the activation energy of the crystallization of CAU-1-(OH)(2) exhibits similar values for microwave and conventional synthesis.

Document Type: Article
Additional Information: Ahnfeldt, Tim Moellmer, Jens Guillerm, Vincent Staudt, Reiner Serre, Christian Stock, Norbert Germany Chemistry (Weinheim an der Bergstrasse, Germany) Chemistry. 2011 May 27;17(23):6462-8. doi: 10.1002/chem.201003708. Epub 2011 Apr 27.
Refereed: Yes
DOI etc.: 10.1002/chem.201003708
ISSN: 1521-3765 (Electronic) 0947-6539 (Linking)
Date Deposited: 01 Nov 2012 05:06
Last Modified: 01 Nov 2012 05:06
URI: http://eprints.uni-kiel.de/id/eprint/16611

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