Characterization of the triplet charge-transfer state of 4-amino-N-methylphthalimide in aprotic and protic media by laser flash photolysis

Identification of tyrosine in the presence of tryptophan using Cd2+-enriched colloidal CdS nanoparticles: A fluorescence spectroscopic study

“…Fluorescence lifetimes of tryptophan both in the absence as well as in the presence of sulfide-enriched CdS colloidal solutions were measured using a time-correlated single photon counting (TCSPC) spectrophotometer ((Edinburgh) with FWHM (full-width at half-maximum) ¼ 1.2 ns and repetition rate of 25 kHz). The details of the setup are described elsewhere [22]. Fig.…”

Solvent polarity effect on excited‐state lifetime of carotenoids and some dyes

“…Similar solvent effects on the fluorescence lifetime have been observed for several aminocoumarin dyes that also contain a lactone‐like ring included in the π‐conjugation system 5. To this must be added many polar compounds such as phthalimides,6–9 rhodamines,10 diphenylpolyenes,11, 12 stilbazolium‐like dye,13 and others. Viktorova and Veselova6 have produced very important experimental studies of fluorescence quenching of a number of dyes in deuterated H‐bond‐forming solvents.…”

“…(For AMP in usual alcohols, the S 1 lifetimes obtained in Refs 6. and9 for deoxygenated solutions were averaged. The τ max , 21.8, 20.4, and 20.3 ns for AMP, MAMP, and DMAMP respectively, were taken from measurements done by us in 1‐propanol solutions at 77 K. The time‐resolved spectrometer PRA SYSTEM 3000 was used for this purpose.)…”

Temperature tunability of size in CdS nanoparticles and size dependent photocatalytic degradation of nitroaromatics

“…Fluorescence lifetimes of thiophenol capped CdS nanoparticles both in the absence and in the presence of nitrotoluene were measured using a time-correlation-single-photon-counting (TC-SPC) spectrophotometer (Edinburgh) with FWHM = 1.2 ns and repetition rate of 25 kHz. The details of the set up are described elsewhere [26]. Room temperature photoluminescence quantum efficiency (PLQE) of the as-prepared NPs was determined following the procedure described elsewhere [27] by taking quinine sulfate as reference (analytical grade, BDH, 57% PLQE) in 0.1 M H 2 SO 4 .…”