Influence of C2-Methylation of Imidazolium Based Ionic Liquids on Photoinduced Spin Dynamics of the Dissolved ZnTPP Studied by Time-Resolved EPR
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Zeitschrift fur Physikalische Chemie-International Journal of Research in Physical Chemistry and Chemical Physics
ISSN: 0942-9352
, E-ISSN: 2196-7156
|
| 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
,
Prikhodʹko Sergey A.
3
,
Adonin Nicolay Yu.
3
,
Bagryanskaya Elena G.
2,4
,
Fedin Matvey V.
1
|
| Affiliations |
| 1 |
International Tomography Center SB RAS, 630090, Novosibirsk, Russia
|
| 2 |
Novosibirsk State University, 630090, Novosibirsk, Russia
|
| 3 |
Boreskov Institute of Catalysis SB RAS, 630090, Novosibirsk, Russia
|
| 4 |
N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 630090, Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
14-13-00826
|
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.