ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2363

Title: CO2 triggering and controlling orthogonally multiresponsive photochromic systems.
Authors: Darwish, TA
Evans, RA
James, M
Malic, N
Triani, G
Hanley, TL
Keywords: Carbon Dioxide
Photochromic Materials
Amidines
Control Systems
Orthogonal Transformations
Response Functions
Issue Date: 11-Aug-2010
Publisher: American Chemical Society
Citation: Darwish, T. A., Evans, R. A., James, M., Malic, N., Triani, G., & Hanley, T. L. (2010). CO2 triggering and controlling orthogonally multiresponsive photochromic systems. Journal of the American Chemical Society, 132(31), 10748-10755.
Abstract: We report a new generic method of reversibly controlling the photochromism of spiropyrans. It was found that the photochromic effect of spiropyrans can be reversibly switched on and off by addition and removal of carbon dioxide (CO2) to spiropyran in alcohol solutions containing an amidine (i.e., DBU) that acts as a CO2 sensitizer. Spiropyrans are not photochromic in the presence of DBU but photochromic when CO2 is subsequently added to the solution. The CO2 is readily removed by inert gas bubbling, thus allowing facile activation and deactivation of the photochromic effect. Carbon dioxide, without the presence of the sensitizing amidine, had no effect on photochromism of the spiropyrans. Other photochromic dyes classes such as spirooxazines and chromenes are not affected by this CO2/DBU stimulus. As a result, orthogonal activation of mixtures of spirooxazines and spiropyrans was achieved to provide four color states (clear, yellow, green, and blue) by varying the combinations of the stimuli of UV, visible light, CO2, and CO2 depleted. This finding now permits the many applications using spiropyrans to be CO2 responsive. © 2010, American Chemical Society
URI: http://dx.doi.org/10.1021/ja1013322
http://apo.ansto.gov.au/dspace/handle/10238/2363
ISSN: 0002-7863
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback