Absorption of the flavin dimers

Grajek, Hanna; Drabent, Regina; Żurkowska, Grażyna; Bojarski, C.

doi:10.1016/0304-4165(84)90152-1

Cited by 30 publications

(24 citation statements)

References 8 publications

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“…24 This is in contrast to the observations by Weber and others that base stacking is maximized in aqueous solution and thwarted in nonpolar solvents. 22,41,42 We have also seen that band II is somewhat sensitive to flavin concentration in 2-MTHF at low temperature (data not shown). Dimerization should result in a larger available charge density, increasing the apparent polarizability of the sample.…”

Section: Figurementioning

confidence: 73%

A Stark Spectroscopic Study of N(3)-Methyl, N(10)-Isobutyl-7,8-Dimethylisoalloxazine in Nonpolar Low-Temperature Glasses: Experiment and Comparison with Calculations

Stanley

Siddiqui

2001

J. Phys. Chem. A

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Flavins have unique electronic properties that have led to their utilization in biological redox chemistry. Despite this there is relatively little experimental information about such basic electronic properties as dipole moments and polarizabilities for these molecules. We have explored the electronic structure of the ground and first two excited electronic states of an oxidized flavin in nonpolar organic glasses using Stark spectroscopy. The dipole moment change for the S 0 f S 1 transition is about 3 times smaller than the dipole moment change for the S 0 f S 2 transition. Dipole moment directions for these excited states have been calculated using the experimental results along with predictions from calculations. The experimental results are consistent with computational predictions of intramolecular charge transfer for the S 0 f S 2 transition. In addition, we have verified that there is a large change in polarizability for the S 2 state vs the S 0 and S 1 states. Both excited-state polarizability changes show a slight dependence on the polarity of the solvent. The physical origin behind this trend is explored.

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Section: Figurementioning

confidence: 73%

A Stark Spectroscopic Study of N(3)-Methyl, N(10)-Isobutyl-7,8-Dimethylisoalloxazine in Nonpolar Low-Temperature Glasses: Experiment and Comparison with Calculations

Stanley

Siddiqui

2001

J. Phys. Chem. A

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“…Their absorption, fluorescence, fluorescence excitation, phosphorescence and polarization spectra have been many times measured and their photophysical properties like emission anisotropy, solvatochromism and temperature effect on absorption and luminescence spectra, vibronic structure and intersystem crossing have been elaborated (Beinert, 1960;Kozioł, 1966Kozioł, , 1969Song, 1971;ScolaNagelschneider& Hemmerich 1972, Siódmiak & Frąckowiak, 1972Song et al, 1972;Sun et al 1972, Müller et al, 1973Visser, Ommen, Ark, Müller & Voors;, 1974;Drabent & Białłowicz, 1976;Drabent, 1977;Heelis, Parsons B, Phillips & McKellar, 1978;Heelis 1982;Bystra & Drabent 1982;Bystra, Drabent & Szubiakowska, 1983;Drabent & Laczko, 1984;Grajek, Drabent, Żurkowska .& Bojarski 1984;1986;Grajek, Żurkowska, Bojarski P., Kukliński, Smyk, Drabent & Bojarski C 1998;Grajek, 2003;Grajek, 2007).…”

Section: Spectral and Structural Properties Of Flavin Photoreceptorsmentioning

confidence: 98%

Review - Flavins as photoreceptors of blue light and their spectroscopic properties

Grajek¹

2011

Current Topics in Biophysics

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This review describes 1) the development of studies on flavin photoreceptors as blue light photoreceptors in many living organisms: their kinds and functions; 2) the studies on spectroscopic properties of flavins, both their dimers and monomers; 3) nonradiative excitation energy transport in the presence of monomers and fluorescent/nonflurescent FMN dimers (excitation traps). The existence equilibrated luminescent FMN centers, energy migration and excitation sink to FMN dimers are taken into account.

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“…The absorption spectra of dimers ( Fig. 2) possess a characteristic shoulder at about 480 nm [35,37,64].…”

Section: Introductionmentioning

confidence: 99%

“…For the first time typical studies of the FMN dimerization process were carried out for FMN in water and in a glycerol-water solution in 1984 [64,35]. In these works the effect of dimerization on the absorption spectrum of flavins was studied.…”

Section: Introductionmentioning

confidence: 99%

“…The limit of solubility was not exceeded and not approached. In water, the solubility of FMN reaches 8 × 10 −2 M, but in investigations of FMN in water the following range of concentrations was used: from C = 1 × 10 −5 M to 1.8 × 10 −2 M (in publications [62,64,35,68]). However, the solubility of FMN in the glycerol-water (GW) solution and in PVA is higher, so C max = [ [50][51][52] 9 × 10 −2 M was used for GW solution [64,69,70] and C max = 1 M for PVA [61,36].…”

Section: Introductionmentioning

confidence: 99%

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Absorption of the flavin dimers

Cited by 30 publications

References 8 publications

A Stark Spectroscopic Study of N(3)-Methyl, N(10)-Isobutyl-7,8-Dimethylisoalloxazine in Nonpolar Low-Temperature Glasses: Experiment and Comparison with Calculations

A Stark Spectroscopic Study of N(3)-Methyl, N(10)-Isobutyl-7,8-Dimethylisoalloxazine in Nonpolar Low-Temperature Glasses: Experiment and Comparison with Calculations

Review - Flavins as photoreceptors of blue light and their spectroscopic properties

Resonance energy transfer between FMN molecules in the presence of dimers: A review

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