TRANES analysis of the fluorescence of nile red in organized molecular assemblies confirms emission from two species View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2001-04

AUTHORS

A S R Koti, N Periasamy

ABSTRACT

Time-resolved area normalized emission spectroscopy (TRANES) is a new method for the analysis of fluorescence of dyes in complex chemical and biological systems (A S R Koti, M M G Krishna and N Periasamy, 2001,J. Phys. Chem.105, 1767). The model-free method extends the power of time-resolved emission spectroscopy (TRES) analysis and removes the ambiguity in the interpretation when the emission spectrum is time-dependent. Observation of an isoemissive point in TRANES analysis of fluorescence is an unambiguous indication for the presence of two emissive species in the sample. The isoemissive point occurs at a wavelength where the ratio of the radiative rates of the two species is equal to the ratio of their total radiative rates. The polarity-sensitive nile red dye shows time-dependent emission spectra in the organized bilayer assemblies of TX micelle and bilayer egg-phosphotidylcholine (egg-PC) membrane. Time-dependent spectra in complex systems support many important models (solvation model and heterogeneity in the ground and/or excited state). TRANES analysis shows that the fluorescence emission of nile red in TX micelle and egg-PC membrane is due to two emissive species solubilized in different sites. More... »

PAGES

157-163

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02704188

DOI

http://dx.doi.org/10.1007/bf02704188

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1050919278


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