ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Mini-review on a polymers film detector for chloroform vapour: julolidine as fluorescent molecular rotors (JCFMRs)

Rahul A. Kalel

Department of Chemistry, Padmabhushan Dr. Vasantraodada Patil Mahavidyalaya, Tasgaon, Dist.- Sangli, India

E-mail: rahulkalel89@gmail.com

Received: 7 June 2022  Accepted: 26 October 2022

Abstract:

Volatile organic compounds (VOCs) have adverse effects on animal health and the environment. Terrestrial life and animal health can be balanced by inhibiting environmental deterioration caused by VOCs. Hence, detection and control of the concentration of these VOCs are essential. Over the last two decades, research has been carried out to design simple, sensitive, selective, portable, real-time VOC detection sensors that are cost-effective and user-friendly. Various detectors based on nanomaterials, semiconductors, gas sensors, spectroscopic methods, etc. have been developed. Because of their sensitivity, simplicity, and reliability to detect VOCs, fluorescence-based sensors are attracting much attention from researchers. Numbers of fluorescence ‘switch-on’ and ‘switch-off’ probes for VOC detection have been developed as solid-state films. To the best of our knowledge, very few reports are available in the literature that shows fluorescence ‘turn-on’ due to the incorporation of fluorophore in the solid-state polymer film. These again show a ‘turn-off’ response in the presence of VOCs' vapours. Between these sensors, fluorescent molecular rotors containing polymer films were critically studied. In the present mini-review, we studied the Julolidine-containing fluorescent molecular rotors (JCFMRs) incorporated in the polymer materials investigated between 2010 and 2022. Moreover, we presented the sensitivity of such sensors relative to % variation in their emission spectral characteristics and response time. We have shown the schematic representation of the sensing mechanism of such probes. The possible future scope of research in the field of molecular rotor-based plastic film detectors has been discussed.

Keywords: Fluorescent molecular rotors; Polymer thin film; Julolidine; Volatile organic compound; Julolidine as VOC sensors

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02567-5

Chemical Papers 77 (3) 1253–1261 (2023)