Colorimetric detection of nitroaromatics using organic photochromic compounds

Vamvounis, George, and Sandery, Nicholas (2015) Colorimetric detection of nitroaromatics using organic photochromic compounds. Australian Journal of Chemistry, 68 (11). pp. 1723-1726.

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Abstract

An organic photochromic compound is explored as a new portable colorimetric sensor for nitroaromatics. This photochromic compound switches from colourless to pink upon exposure to ultraviolet light. In the presence of nitroaromatic explosive derivatives the photoswitching behaviour of the dithienylethene is suppressed, while a potential false positive (toluene) has little effect. The degree of photoswitching inhibition was determined by comparing the integrated visible absorption with the concentration of the analyte to give the pseudo Stern–Volmer constant (K(PSV)). The K(PSV)s measured varied from 12900 (p-nitrotoluene) to 236 M^–1 (toluene), which were directly related to the analyte absorption at the excitation wavelength.

Item ID: 39997
Item Type: Article (Research - C1)
ISSN: 0004-9425
Funders: Australian Centre for International Agricultural Research
Projects and Grants: DP1095404
Date Deposited: 19 Aug 2015 05:48
FoR Codes: 03 CHEMICAL SCIENCES > 0305 Organic Chemistry > 030505 Physical Organic Chemistry @ 100%
SEO Codes: 81 DEFENCE > 810104 Emerging Defence Technologies @ 100%
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