An Instrument for Determining Single and Multiple Room-Temperature Phosphorescence Lifetimes

Autor:	K. Nithipatikom, B. D. Pollard
Rok vydání:	1985
Předmět:	Analyte Spectrometer Filter paper Chemistry 010401 analytical chemistry Analytical chemistry 010402 general chemistry Charge-transfer complex 01 natural sciences 0104 chemical sciences Time-resolved spectroscopy Phosphorescence Luminescence Instrumentation Spectroscopy Data reduction
Zdroj:	Applied Spectroscopy. 39:109-115
ISSN:	1943-3530 0003-7028
DOI:	10.1366/0003702854249259
Popis:	A Room-Temperature Phosphorescence Lifetime Spectrometer (RTPLS) capable of resolving multicomponent intensity decays into separate lifetimes is described. Careful blank subtraction facilitated by a reproducible chopped-xenon arc source and data reduction with the use of nonlinear least-squares reconvolution are major features of the RTPLS. The performance and limitations of the RTPLS were evaluated with synthetic data and prepared samples. Better than 2% RSD was attained for multiple determinations of a single sample. 4-amino-1-naphthalenesulfonate, sodium salt and 2-naphthalenesulfonate, sodium salt both exhibit decays resolvable into two lifetimes when they are coadsorbed with NaI onto filter paper. The approximate ratio of the lifetimes is 1 to 10, and the shorter component is proposed to be a charge transfer complex between the analyte and NaI.
Databáze:	OpenAIRE
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