Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 61,
  • Issue 1,
  • pp. 102-109
  • (2007)

Method of Determination of Emission Properties of Very Weakly Emitting Species Ensuring Elimination of Emission of Impurities

Not Accessible

Your library or personal account may give you access

Abstract

This paper describes a new type of spectrofluorimeter, composed of a high-performance liquid chromatography (HPLC) system directly connected to a fluorescence detector and an absorption photodiode array detector, designed for studying the emission of weakly emitting species. Procedures for measurements of emission spectra (ES), emission excitation spectra (EES), and quantum yields of emission (Φ<sub>E</sub>) for very weakly emitting systems (Φ<sub>E</sub> ≥ 10<sup>−7</sup>) have been proposed. The original methodical solution allows verification of whether the emission observed comes solely from the compound studied (and not from its impurities) or from some photochemical or thermal process taking place during measurements. Thanks to the use of this new type of spectrofluorimeter, it is possible to establish with a high probability that the dependence of the shape and position of the ES on the excitation wavelength and the differences between EES and absorptance spectra are due to photophysical and/or photochemical properties of the compound studied and not due to the presence of emitting impurities. An especially interesting application of this method is to study the emission of species whose very weak emission is related to a very short lifetime as well as a low radiative rate constant. It is particularly suitable to the study of the emission properties of flexible molecules that can occur in a few conformers of different absorption and emission properties. The performance of the method is illustrated by the results of the emission studies carried out for N<sup>α</sup>-acetyl-2-(uracil-5-yl)-L-tryptophan N-ethylamide.

PDF Article
More Like This
Excitation-emission fluorimeter based on linear interference filters

Michael Gouzman, Nadia Lifshitz, Serge Luryi, Oleg Semyonov, Dmitry Gavrilov, and Vyacheslav Kuzminskiy
Appl. Opt. 43(15) 3066-3072 (2004)

Emission efficiency enhanced by reducing the concentration of residual carbon impurities in InGaN/GaN multiple quantum well light emitting diodes

J. Yang, D. G. Zhao, D. S. Jiang, P. Chen, Z. S. Liu, J. J. Zhu, X. J. Li, X. G. He, J. P. Liu, L. Q. Zhang, H. Yang, Y. T. Zhang, and G. T. Du
Opt. Express 24(13) 13824-13831 (2016)

A Survey of Present Methods Used to Determine the Optical Properties of Phosphors*,**

Wayne B. Nottingham
J. Opt. Soc. Am. 39(8) 641-647 (1949)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved