01974nas a2200241   4500008004100000022001400041245011600055210006900171260007300240300001000313490000800323520107600331653001501407653002701422653002201449653001101471653002301482100002301505700002501528700003001553700002301583856012601606       2010                        eng d  a0921-510700aCitrate-capped quantum dots of CdSe for the selective photometric detection of silver ions in aqueous solutions0 aCitratecapped quantum dots of CdSe for the selective photometric  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a60-650 v1683 a<p>A simple strategy for the synthesis of water soluble, luminescent, citrate-capped CdSe quantum dots (Q-CdSe) and their applications to selective detection of silver ions are described. The steady state photoluminescence (PL) spectra show single, narrow emission band at ca. 554 nm without any contribution from the trap states. The effect of various ions including physiologically important metal ions (viz. K(+), Ca(2+), Fe(3+), Zn(2+), Mg(2+), Mn(2+), Cu(2+), Ag(+), Pb(2+) and Cd(2+)), on the PL intensity of citrate-capped Q-CdSe has been studied. Among these, selective luminescence quenching with Ag(+) ion was found to be predominant. Under the optimum conditions, the response was linear between 1.7 and 18 mu M. The quenching constant K(SV) was found to be ca. 3.4 x 10(5) M(-1). The mechanism of photoluminescence quenching of Q-CdSe by metal ions (Ag(+)) is also discussed. Based on these studies, the potential use of Q-CdSe as a luminescent probe for the selective detection of silver ion has been proposed. (C) 2009 Elsevier B.V. All rights reserved.</p>10aAg(+) ions10aLuminescence quenching10aLuminescent probe10aQ-CdSe10aTri-sodium citrate1 aIngole, Pravin, P.1 aAbhyankar, Rajiv, M.1 aPrasad, Bhagavatula L. V.1 aHaram, Santosh, K.  uhttps://library.ncl.res.in/content/citrate-capped-quantum-dots-cdse-selective-photometric-detection-silver-ions-aqueous-0