Facile Synthesis of XXXX -capped @entity9545 Quantum Dots as a Fluorescence Sensor for Rapid Detection and Quantification of @entity6453 .

@entity6453 @entity2041 @entity3603 @entity8229 @entity579 @entity9545
This paper describes a convenient and rapid fluorescence sensor for determination of @entity6453 (PA) based on @entity2041 -capped @entity9545 @entity3603 ( @entity3603 ). The methodology enabled the use of a simple synthesis procedure for water solubilization of @entity9545 @entity3603 via a fast route using @entity2041 as a capping agent within 15 min. The resulting water-soluble @entity3603 exhibit a strong fluorescence emission at 536 nm with high and reproducible photostability. PA is an important class of electron acceptors for @entity3603 . Thus, the fluorescence intensity of the @entity2041 -capped @entity9545 @entity3603 probe could be dramatically quenched by PA due to the electron transfer mechanism. The fluorescence intensity of the @entity9545 @entity3603 system was proportional to PA concentration in the range of 0.025 to 1.5  g mL(-1), with a detection limit of 0.01  g mL(-1). The time of analysis sample, including preparation of @entity3603 and fluorescent measurement for PA, was only 20 min. Most of the potentially coexisting substances did not interfere with the PA-induced quenching effect except @entity8229 . Furthermore, the analytical applicability of the proposed method was demonstrated by analyzing PA in water, @entity579 and cabbage samples, and the recoveries were between 86 and 105% which satisfied the requirement of detection for PA. These results showed that the proposed method was simple in design and fast in operation, and could be used as a sensitive tool for detecting PA in environmental and agricultural samples.
