Abstract
AbstractThis paper presents the development of a facile and cost effective method for the preparation of highly stable red fluorescent wheat gluten stabilized AgAu alloy quantum clusters (AgAuQC@gluten) through galvanic exchange reaction (GER). The as prepared AgAuQC@gluten were characterized by various spectroscopic and microscopic techniques. The QCs exhibited a red fluorescence emission at 690 nm with an appreciable quantum yield of 9.5%.The pH stability and photo stability of QCs were analyzed and was found to display excellent stability in all pH range (1‐12). They also exhibited photostability against UV irradiation for a few hours. Additionally, AgAuQC@gluten were utilized as a fluorescent probe for highly selective sensing of bilirubin. The detection limit was found to be 50 nM. Photoinduced electron transfer (PET) and inner filter effect (IFE) are responsible for the strong quenching of fluorescence of these QCs.Furthermore this method has been validated by applying it for the determination of bilirubin in real blood samples.
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