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Fluorescent Recognition of Potassium and Calcium Ions Using Functionalised CdSe/ZnS Quantum Dots

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Singh, Narinder, Mulrooney, Ray C., Kaur, Navneet and Callan, John F. (2009) Fluorescent Recognition of Potassium and Calcium Ions Using Functionalised CdSe/ZnS Quantum Dots. JOURNAL OF FLUORESCENCE, 19 (5). pp. 777-782. [Journal article]

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DOI: 10.1007/s10895-009-0474-y

Abstract

Schiff base receptor 1a has been synthesised and attached to the surface of preformed CdSe/ZnS Quantum Dots (QDs) to form QD-conjugate 2a. While 1a was determined to be selective for Mg2+, 2a demonstrated selectivity for both K+ and Ca2+ when tested against a range of physiologically and environmentally relevant cations by changes in the fluorescence spectra. Thus, the nanoparticle surface functions as a scaffold for the organisation of receptors enabling semi-selective binding. The fluorescence response was shown to be linear between 15-50 mu M for K+ and 2-35 mu M for Ca2+. It was also demonstrated that 2a could measure both K+ and / or Ca2+ in solutions containing both ions.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Pharmacy and Pharmaceutical Science
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Pharmaceutical Science and Practice
ID Code:4055
Deposited By:Professor John Callan
Deposited On:05 Jan 2010 14:12
Last Modified:19 Nov 2012 15:22

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