Back to Search
Start Over
Engineering a novel rhodamine-based fluorescent probe using host-guest interactions for reversible, selective, and sensitive detection of herbicide paraquat.
- Source :
-
Sensors & Actuators B: Chemical . May2023, Vol. 383, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Although paraquat (PQ) is one of the most extensively used herbicides worldwide, it is hazardous to the environment and the public due to its extreme toxicity towards non-target organisms especially animals and humans. Therefore, developing a detection system for selectively and sensitively detecting PQ remains a great challenge. This report demonstrates the design of a novel highly fluorescent rhodamine-based probe fabricated by rationally inserting adamantane-modified rhodamine into a host cucurbit[7]uril (CB[7]) with a host-guest interaction induced spirocyclic ring-opening process. This host-guest binary complex (1 &CB[7]) had a stronger fluorescence intensity than rhodamine B, which was exploited for PQ detection. Notably, complex 1 &CB[7] displayed high sensitivity toward PQ, with an excellent nanomolar limit of detection of 10 nM. It was determined that this unique detection mechanism involved a process of self-assembly, disassembly, and reassembly, thereby providing a reversible fluorescence response to PQ. With such merits, we successfully quantified and mapped PQ in actual water samples, live cells, and various agricultural products. We anticipated that the constructed complex 1 &CB[7] could acts as a potential alternative for PQ tracking in various applications, highlighting a new paradigm for engineering host-guest probes with spirocyclic ring-opening process for analyte detection. [Display omitted] • A new fluorescent supramolecular probe is fabricated by adamantane-modified rhodamine B and cucurbit[7]uril. • The supramolecular complex can selectively, sensitively, and reversible detect herbicide paraquat through host-guest interaction. • A reversible detection system is realized with host-guest interaction induced spirocyclic ring-opening process. • The supramolecular probe is useful for visual detecting paraquat in actual samples including water and agricultural products. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 383
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 162388110
- Full Text :
- https://doi.org/10.1016/j.snb.2023.133556