Refereed journal article or data article (A1)

Hydrated electron-induced chemiluminescence of thallium(I) ion




List of AuthorsKulmala A, Kulmala S, Ala-Kleme T, Hakanen A, Korpela T

PublisherELSEVIER SCIENCE BV

Publication year1999

JournalAnalytica Chimica Acta

Journal name in sourceANALYTICA CHIMICA ACTA

Journal acronymANAL CHIM ACTA

Volume number382

Issue number3

Start page233

End page243

Number of pages11

ISSN0003-2670

DOIhttp://dx.doi.org/10.1016/S0003-2670(98)00746-6


Abstract
Dissolution of X-ray irradiated sodium chloride or additively coloured potassium chloride induces generation of hydrated electrons which produce thallium(I)-specific chemiluminescence in the presence of thallium(I) ions. Such a luminescence is also called extrinsic lyoluminescence (ELL) of X-ray irradiation coloured sodium chloride, or additively coloured potassium chloride. The present ELL is considered chemiluminescence induced by dissolution-produced strong reducing and oxidising agents, i.e. hydrated electrons, surface-bound and only partially hydrated hole centres, and hydroxyl or sulphate radicals (in the case of additively coloured potassium chloride dissolved in solution containing peroxodisulphate ions). Dichlorothallate(I) (Tl(I)Cl-2(-)) was the main emitter in the ELL processes at about 430 nn. The reduction-initiated excitation pathway of TlCl2- involves a colloidal thallium atom surrounded by chloride anions (Tl(O):2Cl(-)) while in the less important oxidation-initiated excitation pathway the precursor of excited Tl(I)Cl-2(-) is transiently existing T1(II)CI; produced by dissolution-uncovered hole centres (or sulphate radicals). Both of the lyoluminescence procedures allow Tl(I) to be detected below nanomolar concentrations, yielding linear log-log calibration plots spanning several orders of magnitude of concentration. (C) 1999 Elsevier Science B.V. All rights reserved.


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