Spectroscopy and photophysics of lumiflavins and lumichromes

Ewa Sikorska; Igor V. Khmelinskii; Wiesław Prukała; Siân L. Williams; Manisha Patel; David R. Worrall; Jose L. Bourdelande; Jacek Koput; Marek Sikorski

doi:10.1021/jp037048u

Spectroscopy and photophysics of lumiflavins and lumichromes

Ewa Sikorska, Igor V. Khmelinskii, Wiesław Prukała, Siân L. Williams, Manisha Patel, David R. Worrall, Jose L. Bourdelande, Jacek Koput, Marek Sikorski

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

119 Citations (Scopus)

Abstract

Solvent effects on the spectroscopic properties of lumichromes and lumiflavins are presented. Fluorescence yields for lumiflavins are an order of magnitude larger than those for lumichromes, due to their lower nonradiative rate constants. Solvent effects on the absorption and emission band positions are explained on the basis of hydrogen-bonding interactions. TD-DFT calculations predicted that the lowest energy states are n,π* in the case of lumichromes, but π,π* in the case of the lumiflavins. The overall consistency of the predicted singlet-singlet and triplet-triplet transitions obtained for the various compounds studied, and the good correspondence between the predicted and measured transitions, indicate that the techniques applied provide an accurate description of the spectral properties of lumiflavins and lumichromes. The measured singlet oxygen yields have shown the lumichromes to be efficient singlet oxygen sensitizers.

Original language	English
Pages (from-to)	1501-1508
Journal	Journal of Physical Chemistry A
Volume	108
Issue number	9
DOIs	https://doi.org/10.1021/jp037048u
Publication status	Published - 4 Mar 2004

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title = "Spectroscopy and photophysics of lumiflavins and lumichromes",

abstract = "Solvent effects on the spectroscopic properties of lumichromes and lumiflavins are presented. Fluorescence yields for lumiflavins are an order of magnitude larger than those for lumichromes, due to their lower nonradiative rate constants. Solvent effects on the absorption and emission band positions are explained on the basis of hydrogen-bonding interactions. TD-DFT calculations predicted that the lowest energy states are n,π* in the case of lumichromes, but π,π* in the case of the lumiflavins. The overall consistency of the predicted singlet-singlet and triplet-triplet transitions obtained for the various compounds studied, and the good correspondence between the predicted and measured transitions, indicate that the techniques applied provide an accurate description of the spectral properties of lumiflavins and lumichromes. The measured singlet oxygen yields have shown the lumichromes to be efficient singlet oxygen sensitizers.",

author = "Ewa Sikorska and Khmelinskii, {Igor V.} and Wies{\l}aw Pruka{\l}a and Williams, {Si{\^a}n L.} and Manisha Patel and Worrall, {David R.} and Bourdelande, {Jose L.} and Jacek Koput and Marek Sikorski",

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doi = "10.1021/jp037048u",

language = "English",

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TY - JOUR

T1 - Spectroscopy and photophysics of lumiflavins and lumichromes

AU - Sikorska, Ewa

AU - Khmelinskii, Igor V.

AU - Prukała, Wiesław

AU - Williams, Siân L.

AU - Patel, Manisha

AU - Worrall, David R.

AU - Bourdelande, Jose L.

AU - Koput, Jacek

AU - Sikorski, Marek

PY - 2004/3/4

Y1 - 2004/3/4

N2 - Solvent effects on the spectroscopic properties of lumichromes and lumiflavins are presented. Fluorescence yields for lumiflavins are an order of magnitude larger than those for lumichromes, due to their lower nonradiative rate constants. Solvent effects on the absorption and emission band positions are explained on the basis of hydrogen-bonding interactions. TD-DFT calculations predicted that the lowest energy states are n,π* in the case of lumichromes, but π,π* in the case of the lumiflavins. The overall consistency of the predicted singlet-singlet and triplet-triplet transitions obtained for the various compounds studied, and the good correspondence between the predicted and measured transitions, indicate that the techniques applied provide an accurate description of the spectral properties of lumiflavins and lumichromes. The measured singlet oxygen yields have shown the lumichromes to be efficient singlet oxygen sensitizers.

AB - Solvent effects on the spectroscopic properties of lumichromes and lumiflavins are presented. Fluorescence yields for lumiflavins are an order of magnitude larger than those for lumichromes, due to their lower nonradiative rate constants. Solvent effects on the absorption and emission band positions are explained on the basis of hydrogen-bonding interactions. TD-DFT calculations predicted that the lowest energy states are n,π* in the case of lumichromes, but π,π* in the case of the lumiflavins. The overall consistency of the predicted singlet-singlet and triplet-triplet transitions obtained for the various compounds studied, and the good correspondence between the predicted and measured transitions, indicate that the techniques applied provide an accurate description of the spectral properties of lumiflavins and lumichromes. The measured singlet oxygen yields have shown the lumichromes to be efficient singlet oxygen sensitizers.

U2 - 10.1021/jp037048u

DO - 10.1021/jp037048u

M3 - Article

VL - 108

SP - 1501

EP - 1508

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

SN - 1089-5639

IS - 9

ER -

Spectroscopy and photophysics of lumiflavins and lumichromes

Abstract

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