Colorimetric detection of nitroaromatics using organic photochromic compounds
Journal Publication ResearchOnline@JCUAbstract
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.
Journal
Australian Journal of Chemistry
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Volume
68
ISBN/ISSN
0004-9425
Edition
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Issue
11
Pages Count
4
Location
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Publisher
CSIRO
Publisher Url
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Publisher Location
N/A
Publish Date
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Url
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Date
N/A
EISSN
N/A
DOI
10.1071/CH15337