Excitation energy transport and trapping in concentrated solid solutions of flavomononucleotide

Bojarski, Piotr; Kułak, Leszek; Grajek, Hanna; Żurkowska, Grażyna; Kamińska, A.; Kukliński, B.; Bojarski, C.

doi:10.1016/s0304-4165(02)00498-1

Cited by 22 publications

(30 citation statements)

References 25 publications

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“…52 Normally an increase in temperature causes a decrease in local viscosity of the solvent, which facilitates rotation and increases the rotation dependent nonradiative decay. This fact also vindicates the presence of an energy-wasting funnel which draws energy through it.…”

Section: Resultsmentioning

confidence: 99%

Revisit of 4,4′-Diaminodiphenyl Sulfone Photophysics in Different Solvents

Bhattacharya

Sahoo

Chakravorti

2012

Ind. Eng. Chem. Res.

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This paper aims at getting the origin of dual emission of 4,4′-diaminodiphenyl sulfone (Dapsone) in various solvents using steady state and time-resolved emission spectroscopy in conjunction with ground and excited state optimized geometry calculations in gaseous phase and in solvents. The dual fluorescence in different solvents and a distinctive bathochromic spectral shift of the low energy band in polar solvents indicate the possibility of intramolecular charge transfer (ICT) from the donor site (−NH 2 ) to the acceptor moiety in the excited state. Time-resolved emission spectra (TRES) and more precisely timeresolved area normalized emission spectra (TRANES) depict the evolution of the dynamics of excited state species and the charge transfer. Hindrance of rotational relaxation in restricted environments causes intensified charge transfer emission quantum yield. A plausible model for excited state deactivation through ICT has been proposed on the basis of both theoretical and experimental findings. The observed results also necessitate to conceive the involvement of a nonradiative deactivation channel in an unrestricted environment which seems to regulate the ICT emission and photophysics of the probe.

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Section: Resultsmentioning

confidence: 99%

Revisit of 4,4′-Diaminodiphenyl Sulfone Photophysics in Different Solvents

Bhattacharya

Sahoo

Chakravorti

2012

Ind. Eng. Chem. Res.

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“…The CD experimental results were very well described by the Bojarski equation (Eq. (21)) for FMN in rigid PVA [37,83]. However, for FMN in GW solutions [70], a good agreement between the theoretical results and experimental results of r/r 0 = f(C) has been found when, in the Bojarski equation (Eq.…”

Section: Nonradiative Energy Transfer Between Fmn Molecules In Viscoumentioning

confidence: 96%

“…However, in rigid solutions, the FMN dimers become fluorescent and may take part in energy transfer [36,74,73,37].…”

Section: Introductionmentioning

confidence: 99%

“…Investigations on excitation states of flavins, their quantum efficiency [74,75], their lifetime in the excited state [63,75], and the polarization of fluorescence [37,70] or ways of nonradiative energy transfer [37,68], can be important for explaining the photoreception phenomena in which flavins take part. Flavins show a strong tendency to generate triplet states that might give rise to additional photochemistry or energy dissipation because their triplet states are particularly photoreactive [58,75,76].…”

Section: Introductionmentioning

confidence: 99%

“…The resonance energy transfer and energy migration between FMN molecules were widely examined in water [68], viscous [69,70] and rigid solutions [36,37,82,83].…”

Section: Introductionmentioning

confidence: 99%

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