White light emission from coumarin and rhodamine derivatives based on RGB multicomponent system

Chan, Nadia Nabihah Mohd Yusof; Idris, Azila; Abidin, Zamri Zainal; Tajuddin, Hairul Anuar

doi:10.1016/j.jphotochem.2023.114577

Cited by 6 publications

(1 citation statement)

References 81 publications

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“…Of the resulting 26 articles, 20 displayed J values in M -1 cm -1 nm 4 and related units, while 6 displayed J values in M -1 cm 3 and related units (Table 1) . Second, a meta-data search of a leading photosciences journal, Journal of Photochemistry and Photobiology A: Chemistry, also showed dominance of the units M -1 cm -1 nm 4 for J values: 27 articles appeared as hits by keyword search, wherein J values are reported in M -1 cm -1 nm 4 and related units for 11 articles versus M -1 cm 3 for 4 articles [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68]. Third and on the other hand, a meta-data search for a leading spectroscopy journal, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, revealed an opposite trend, where M -1 cm 3 and related units (24 articles) were dominant compared to M -1 cm -1 nm 4 and related units (9 articles) .…”

Section: Förster Resonance Energy Transfer (Fret)mentioning

confidence: 99%

Appropriate handling of fluorescence spectra for accurate spectral overlap (J) values in Förster energy transfer (FRET) calculations

Taniguchi,

Du,

Lindsey

2024

SPIE Future Sensing Technologies 2024

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Fluorescence (or Förster) resonance energy transfer (FRET) describes the flow of energy from a donor fluorophore to an acceptor chromophore. Among the parameters in determining FRET efficiency is the donor-acceptor energy matching, given by the overlap of the donor fluorescence spectrum and the acceptor absorption spectrum (J value). Calculations of the J value typically rely on experimentally acquired spectra. When a fluorescence spectrum is converted from the wavelength (nm) scale to the wavenumber (cm -1 ) scale, the Y-axis intensity needs to be corrected by the square of the wavelength (termed the l 2 correction), because fluorescence spectra (but not absorption spectra) are collected with a fixed wavelength bandpass. The l 2 correction causes the peak intensity of the short-wavelength (long-wavenumber) side of the fluorescence spectrum to decrease, or the peak intensity of the long-wavelength (short-wavenumber) side to increase. This issue has been known for >60 years but the impact remains little appreciated. The relatively new availability of libraries of spectral data enabled assessment here of the l 2 correction for various donor-acceptor pairs (i.e., donor fluorescence spectra and acceptor absorption spectra). The magnitude of error introduced upon omitting the l 2 correction increases with the width of the spectra. A meta-analysis of recent literature reveals trends in usage of wavenumber or wavelength scales. While either scale can be used, errors in calculating the ostensibly simple J term are not uncommon. Best methods are articulated here. The software program PhotochemCAD 3, which incorporates the l 2 correction for FRET calculations and also contains diverse spectral libraries, is freely downloadable at www.photochemcad.com.

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