Excitation energy transport and trapping in concentrated solid solutions of flavomononucleotide

Excitation energy transport and trapping is studied for monomer–fluorescent dimer system of flavomononucleotide (FMN) in polyvinyl alcohol films (PVA). It is shown that the theory neglecting reverse energy transfer (RET) from dimers to monomers does not allow for the explanation of concentration que...

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Published inBiochimica et biophysica acta Vol. 1619; no. 2; pp. 201 - 208
Main Authors Bojarski, P., Kułak, L., Grajek, H., Żurkowska, G., Kamińska, A., Kukliński, B., Bojarski, C.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 20.01.2003
Subjects
Dimerization
Energy Transfer
Excitation energy
Flavin Mononucleotide - chemistry
Flavomononucleotide
Fluorescence Polarization
Models, Theoretical
Monte Carlo Method
Polyvinyl Alcohol - chemistry
Polyvinyl alcohol film
Solutions - chemistry
Polyvinyl alcohol film
Flavomononucleotide
Excitation energy
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ISSN0304-4165
0006-3002
1872-8006
DOI10.1016/S0304-4165(02)00498-1

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Summary:Excitation energy transport and trapping is studied for monomer–fluorescent dimer system of flavomononucleotide (FMN) in polyvinyl alcohol films (PVA). It is shown that the theory neglecting reverse energy transfer (RET) from dimers to monomers does not allow for the explanation of concentration quenching and concentration depolarization results presented herein. Much better agreement has been obtained using generalized energy transport theory in which fluorescent dimers are treated as imperfect traps for excitation energy. Such parameters like the dimer quantum yield and its emission anisotropy are estimated.
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ISSN:0304-4165
0006-3002
1872-8006
DOI:10.1016/S0304-4165(02)00498-1