Imperial College London
Alternate

ProfessorMarkOxborrow

Faculty of Engineering, Department of Materials

Professor in Functional Microwave Materials
 
 
 
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Contact

 

+44 (0)20 7594 1410m.oxborrow

 
 
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Location

 

2.04Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wu:2019:10.1021/acs.jpcc.9b08439,
author = {Wu, H and Ng, W and Mirkhanov, S and Amirzhan, A and Nitnara, S and Oxborrow, M},
doi = {10.1021/acs.jpcc.9b08439},
journal = {The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter},
pages = {24275--24279},
title = {Unraveling the room-temperature spin dynamics of photoexcited pentacene in its lowest triplet state at zero field},
url = {http://dx.doi.org/10.1021/acs.jpcc.9b08439},
volume = {123},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Photoexcited pentacene, upon arriving via intersystem crossing into its lowest triplet state, has been extensively studied due to the large and relatively long-lived spin polarization that it exhibits. However, the spin dynamics of these triplets has not hitherto been accurately determined, with glaring inconsistencies between published values. Using zero-field transient electron paramagnetic resonance (ZF-trEPR), we here report the determination of a complete set of depopulation and spin–lattice relaxation rates for the lowest triplet state of pentacene doped at 0.1% into a p-terphenyl host crystal at room temperature in zero applied magnetic field. The rates of spin–lattice relaxation between the triplet’s sublevels are found to be highly anisotropic (i.e., transition-specific) and not negligible compared to the rates of depopulation from the same three sublevels back to pentacene’s ground state. The spin dynamics, as well as the ZF-trEPR technique reported here, can aid the rational, quantitative engineering of applications such as room-temperature masers and triplet dynamic nuclear polarization.
AU  - Wu,H
AU  - Ng,W
AU  - Mirkhanov,S
AU  - Amirzhan,A
AU  - Nitnara,S
AU  - Oxborrow,M
DO  - 10.1021/acs.jpcc.9b08439
EP  - 24279
PY  - 2019///
SN  - 1932-7447
SP  - 24275
TI  - Unraveling the room-temperature spin dynamics of photoexcited pentacene in its lowest triplet state at zero field
T2  - The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter
UR  - http://dx.doi.org/10.1021/acs.jpcc.9b08439
UR  - http://hdl.handle.net/10044/1/74111
VL  - 123
ER  -
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