Mn-doped ZnS phosphorescent quantum dots: Coumarins optical sensors

PACHECO, M. E. ; CASTELLS, C. B.; BRUZZONE, L.

SENSORS AND ACTUATORS B-CHEMICAL

ELSEVIER SCIENCE SA

Lugar: Amsterdam; Año: 2017 vol. 238 p. 660 - 666

0925-4005

tMn-doped ZnS quantum dots (QDs) have increasingly attracted much attention as luminescent sensors. Mn+2doping promotes a strong phosphorescence-like emission, allowing the development of noveland highly selective sensing phases. In this vein, a coumarins phosphorescent sensor was developedbased on the room temperature phosphorescence quenching of water-soluble Mn-doped ZnS QDs. Phos-phorescence lifetimes were measured in order to clarify the involved quenching mechanism. Warfarindetermination in pharmaceutical products was performed, reaching good figures of merit. The developedmethodology is an alternative, rapid, simple, sensitive and selective method for coumarins determinationin pharmaceutical and toxicological samples