Influence of C2-Methylation of Imidazolium Based Ionic Liquids on Photoinduced Spin Dynamics of the Dissolved ZnTPP Studied by Time-Resolved EPR

Influence of C2-Methylation of Imidazolium Based Ionic Liquids on Photoinduced Spin Dynamics of the Dissolved ZnTPP Studied by Time-Resolved EPR Full article

Journal

Zeitschrift fur Physikalische Chemie
ISSN: 0942-9352

Output data

Year: 2017, Volume: 231, Number: 2, Pages: 391-404 Pages count : 14 DOI: 10.1515/zpch-2016-0820

Tags

EPR; ionic liquids; photoexcited triplets; polarization; TR EPR

Authors

Ivanov Mikhail Yu. ^1,2 , Prikhod'ko Sergey A. ³ , Adonin Nicolay Yu. ³ , Bagryanskaya Elena G. ^2,4 , Fedin Matvey V. ^1,2

Affiliations

1	(Данные Web of science) Int Tomog Ctr SB RAS, Inst Skaya Str 3a, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Novosibirsk 630090, Russia
3	(Данные Web of science) Boreskov Inst Catalysis SB RAS, Novosibirsk 630090, Russia
4	(Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem SB RAS, Novosibirsk 630090, Russia

Unusual physical properties of ionic liquids (ILs) can be implemented in many different applications and are very sensitive to the structure of IL. In this work we investigate the spin dynamics of probe molecule Zn tetraphenylporphyrin (ZnTPP) dissolved in a series of ILs using time-resolved electron paramagnetic resonance (TR EPR). We compare the TR EPR characteristics in C2-methylated imidazolium-based ILs [bmmim] BF4 and [bmmim] PF6 and in their C2-protonated analogs [bmim] BF4 and [bmim] PF6 to assess the influence of C2-methylation. The corresponding TR EPR signatures are drastically different in the two types of ILs. The analysis of experimental data allows assumptions that the ZnTPP molecule is distorted in C2-methylated ILs, contrary to other organic media and C2-protonated analogs. The mobility of ZnTPP in C2-methylated ILs is smaller compared to that in C2-protonated analogs, implying different microenvironment formed around dissolved ZnTPP.

Ivanov M.Y. , Prikhod'ko S.A. , Adonin N.Y. , Bagryanskaya E.G. , Fedin M.V.
Influence of C2-Methylation of Imidazolium Based Ionic Liquids on Photoinduced Spin Dynamics of the Dissolved ZnTPP Studied by Time-Resolved EPR
Zeitschrift fur Physikalische Chemie. 2017. V.231. N2. P.391-404. DOI: 10.1515/zpch-2016-0820 WOS Scopus РИНЦ

Published online:	Nov 22, 2016
Published print:	Jan 1, 2017

Web of science	WOS:000393576100013
Scopus	2-s2.0-85012191762
Elibrary	29478240
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