Low field photo-CIDNP in the intramolecular electron transfer of naproxen-pyrrolidine dyads

Low field photo-CIDNP in the intramolecular electron transfer of naproxen-pyrrolidine dyads Научная публикация

Журнал

Physical Chemistry Chemical Physics
ISSN: 1463-9076

Вых. Данные

Год: 2016, Том: 18, Номер: 2, Страницы: 901-907 Страниц : 7 DOI: 10.1039/C5CP04233J

Авторы

Magin I.M. ¹ , Polyakov N.E. ¹ , Kruppa A.I. ¹ , Purtov P.A. ¹ , Leshina T.V. ¹ , Kiryutin A.S. ^2,3 , Miranda M.A. ⁴ , Nuin E. ⁴ , Marin M.L. ⁴

Организации

1	Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya st. 3, 630090, Novosibirsk, Russia.
2	Novosibirsk State University, 2, Pirogov st., 630090 Novosibirsk, Russia
3	International Tomography Center, SB RAS, Institutskaya 3-a, Novosibirsk 630090, Russia
4	Instituto Universitario Mixto de Tecnologia Quimica (UPV-CSIC), Universitat Politecnica de Valencia, Av. de los Naranjos s/n, E-46022, Valencia, Spain

Photoinduced processes with partial (exciplex) and full charge transfer in donor-acceptor systems are of interest because they are frequently used for modeling drug-protein binding. Low field photo-CIDNP (chemically induced dynamic nuclear polarization) for these processes in dyads, including the drug, (S)- and (R)-naproxen and (S)-N-methyl pyrrolidine in solutions with strong and weak permittivity have been measured. The dramatic influence of solvent permittivity on the field dependence of the N-methyl pyrrolidine 1H CIDNP effects has been found. The field dependences of both (R,S)- and (S,S)-dyads in a polar medium are the curves with a single extremum in the area of the S-T+ terms intersection. Moreover, the CIDNP field dependences of the same protons measured in a low polar medium present curves with several extrema. The shapes of the experimental CIDNP field dependence with two extrema have been described using the Green function approach for the calculation of the CIDNP effects in the system without electron exchange interactions. The article discusses the possible causes of the differences between the CIDNP field dependence detected in a low-permittivity solvent with the strong Coulomb interactions and in a polar solvent.

Magin I.M. , Polyakov N.E. , Kruppa A.I. , Purtov P.A. , Leshina T.V. , Kiryutin A.S. , Miranda M.A. , Nuin E. , Marin M.L.
Low field photo-CIDNP in the intramolecular electron transfer of naproxen-pyrrolidine dyads
Physical Chemistry Chemical Physics. 2016. V.18. N2. P.901-907. DOI: 10.1039/C5CP04233J

Поступила в редакцию:	20 июл. 2015 г.
Принята к публикации:	12 нояб. 2015 г.
Опубликована online:	19 нояб. 2015 г.

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