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Aggregation-induced emission-active hyperbranched polymers conjugated with tetraphenylethylene for nitroaromatic explosive detection.
- Source :
-
Dyes & Pigments . Oct2021, Vol. 194, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- This work develops a facile synthesis for aggregation-induced emission (AIE)-active hyperbranched polyglycidols (HPGs) to design a solid-state sensor for detecting nitroaromatic explosives. The tetraphenylethylene moieties were conjugated onto the periphery of the HPGs in a single step using dynamic boronate ester cross-linkers. The resulting AIE-active HPGs exhibited excellent AIE characteristics in tetrahydrofuran (THF)/H 2 O mixtures, emitting a strong blue fluorescence under UV irradiation. Dynamic light scattering and transmission electron microscopic analyses demonstrated that the self-assembled nanosized aggregates were stable in the THF/H 2 O mixture. The fluorescence of the aggregates was dramatically quenched by various nitro compounds, including 2,4,6-trinitrophenol (or picric acid; PA), 2,6-dinitrophenol, 4-nitrophenol, 4-nitrotoluene, and nitromethane. The nano-aggregates exhibited extraordinary sensitivity towards PA, with a Stern‒Volmer constant (K sv) of 2.27 × 104 M−1 and a limit of detection of 40 ppb. Paper strips encapsulating the aggregates exhibited a vivid visual quenching, promising the practical applicability of these polymers as solid-state sensors for the detection of nitroaromatic explosives. [Display omitted] [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYMERS
*TETRAPHENYLETHYLENE
*PICRIC acid
*LIGHT transmission
*MICROSCOPY
Subjects
Details
- Language :
- English
- ISSN :
- 01437208
- Volume :
- 194
- Database :
- Academic Search Index
- Journal :
- Dyes & Pigments
- Publication Type :
- Academic Journal
- Accession number :
- 151815687
- Full Text :
- https://doi.org/10.1016/j.dyepig.2021.109617