Tetraphenylethene Functionalized Polyhedral Oligomeric Silsesquioxane Fluorescent Probe for Rapid and Selective Trifluralin Sensing in Vegetables and Fruits
- 4 October 2021
- journal article
- research article
- Published by Wiley in Chemistry – An Asian Journal
- Vol. 16 (23), 3970-3977
- https://doi.org/10.1002/asia.202101024
Abstract
A novel fluorescent probe was designed and synthesized from tetraphenylethene (TPE) and polyhedral oligomeric silsesquioxanes (POSS) via Heck-palladium catalyzed cross-coupling reaction. The as-synthesized TPE functionalized probe performed good solvent stability and selectively preconcentration capability towards target analyte due to its stable structure and the adsorption property. The morphology as well as the physical and chemical properties of the POSS@TPE were carefully characterized. The POSS@TPE was employed to develop an effective fluorescent probe for trifluralin, with a response range of 0.1-80 mg/kg and a detection limit of 0.102 mg/kg. The mixed mechanisms of inner-filter effect (IFE) and photoinduced electron transfer (PET) explain the selectivity of POSS@TPE. Rapid detection for trifluralin in tomato and celery has been achieved with recoveries between 99.4-120.7% (RSD≤3.4%), and the results were verified compared with GC-MS method.Keywords
Funding Information
- National Natural Science Foundation of China (21976213, 21775167, 22076223)
- National Key Research and Development Program of China (2019YFC1606101)
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