Publication:
Fabrication of Liquid Crystal Optical Sensors Using Cyclodextrin Polymer for Real Time, Selective and Visible Detection of Industrial Dyes in Contaminated Natural Water Samples

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dc.contributor.authorRashid, Madeeha
dc.contributor.authorPandey, Satyabratt
dc.contributor.authorSingh, Vishal
dc.contributor.authorPatel, Chandan Bhai
dc.contributor.authorSingh, Ranjan Kumar
dc.contributor.authorSingh, Sachin Kumar
dc.date.accessioned2025-07-09T06:30:55Z
dc.date.available2025-07-09T06:30:55Z
dc.date.issued2025
dc.description.abstractIndustrial wastewater release of dyes poses serious environmental and health risks when introduced into natural water systems. Herein, a cyclodextrin-based polymer sensor (Ech-CDP) is developed for real-time, visible detection of harmful methylene blue (MB) and methyl orange (MO) dyes in distilled and contaminated natural water samples. The sensor works through a competitive host-guest mechanism between sodium dodecyl sulphate (SDS) and Ech-CDP, altering liquid crystal alignment. Initially, SDS induces homeotropic ordering, which shifts to a tilted state upon binding with Ech-CDP. The presence of MB or MO displaces SDS, reverting the alignment and causing a visible bright-to-dark transition under polarizers. The sensor exhibits high selectivity, with detection limits of 0.03 mM for MB and 0.05 mM for MO in aqueous solutions, and 0.08 mM for MB and 0.26 mM for MO in real water samples, remains effective for 3 days, and is unaffected by pH variations between 4.8 and 9.1. Additionally, the sensor demonstrates an on–off switching capability, suggesting potential applications for molecular logic gates and advancing environmental monitoring techniques in dye-polluted waters. © 2025 Wiley-VCH GmbH.
dc.identifier.doihttps://doi.org/10.1002/anse.202400117
dc.identifier.issn26292742
dc.identifier.urihttps://dl.bhu.ac.in/ir/handle/123456789/113185
dc.publisherWiley-VCH Verlag
dc.subjecthost–guest interactions
dc.subjectliquid crystal sensors
dc.subjectliquid crystals
dc.subjectpolarised optical microscopes
dc.subjectpollutions
dc.titleFabrication of Liquid Crystal Optical Sensors Using Cyclodextrin Polymer for Real Time, Selective and Visible Detection of Industrial Dyes in Contaminated Natural Water Samples
dc.typeArticle
dspace.entity.typePublication
journal.titleAnalysis and Sensing

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