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

Narinder Singh, Ray C. Mulrooney, Navneet Kaur, John F. Callan

Research output: Contribution to journalArticle

20 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)777-782
JournalJournal of Fluorescence
Volume19
Issue number5
DOIs
Publication statusPublished - Sep 2009

Fingerprint Dive into the research topics of 'Fluorescent Recognition of Potassium and Calcium Ions Using Functionalised CdSe/ZnS Quantum Dots'. Together they form a unique fingerprint.

  • Cite this