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Updated: Mar 9, 2026

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Published on: July 25, 2014
Colorimetric Polydiacetylene-Aerogel Detector for Volatile Organic Compounds (VOCs)
Susmita Dolai1, Susanta Kumar Bhunia1, Stella S Beglaryan2
1Department of Chemistry, Ben Gurion University of the Negev , Beer Sheva 84105, Israel.
Abstract:
A new hybrid system comprising polydiacetylene (PDA), a chromatic conjugated polymer, embedded within aerogel pores has been constructed. The PDA-aerogel powder underwent dramatic color changes in the presence of volatile organic compounds (VOCs), facilitated through infiltration of the gas molecules into the highly porous aerogel matrix and their interactions with the aerogel-embedded PDA units. The PDA-aerogel composite exhibited rapid color/fluorescence response and enhanced signals upon exposure to low VOC concentrations. Encapsulation of PDA derivatives displaying different headgroups within the aerogel produced distinct VOC-dependent color transformations, forming a PDA-aerogel "artificial nose".
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