Radical Enhanced Intersystem Crossing in Bay-Substituted Perylenebisimide-TEMPO Dyad and the Electron Spin Polarization Dynamics Upon Photoexcitation

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Xue ZhangVioleta K Voronkova

Abstract

4-Amino-2,2,6,6-tetramethyl-1-piperidinyloxyl (TEMPO) radical was attached to the bay position of perylene-3,4:9,10-bis(dicarboximide) (perylenebisimide, PBI) to study the radical-enhanced intersystem crossing (REISC) and electron spin dynamics of the photo-induced high spin states. The dyads give strong visible light absorption (e = 27000 M-1 cm-1at 607 nm). Attaching a TEMPO radical to the PBI unit transforms the otherwise non-radiative decay of S1 state (fluorescence quantum yield: 2.9%) of PBI unit to ISC (singlet oxygen quantum yield: 31.8%, fluorescence quantum yield = 1.6%). Moreover, the REISC is more efficient as compared to the heavy atom effect-induced ISC (17.8% for 1,8-dibromoPBI). For the dyad, ISC takes 245 ps and triplet state lifetime is 1.5 microseconds, much shorter than the native PBI (126.6 microseconds). X- and Q-band time-resolved electron paramagnetic resonance spectroscopy shows that the exchange interaction in the photoexcited radical-chromophore dyad is larger than the triplet zero-field splitting (ZFS) and the difference of Zeeman energies of the radical and chromophore. The inversion of electron spin polarization from emissive to absorptive was observed and attributed to the initial completion of th...Continue Reading

References

Jul 23, 2004·The Journal of Chemical Physics·Yuri Kandrashkin, Art Van Der Est
Sep 29, 2005·Journal of Magnetic Resonance·Stefan Stoll, Arthur Schweiger
May 5, 2006·The Journal of Physical Chemistry. a·Mukulesh BaruahNoël Boens
Jul 25, 2007·Photochemistry and Photobiology·Gertz I LikhtensteinShin'ichi Nakatsuji
Feb 14, 2008·Journal of the American Chemical Society·Aaron A RachfordFelix N Castellano
Feb 29, 2008·Chemistry : a European Journal·Martin BröringLucia Flamigni
Apr 1, 2010·Chemical Reviews·Jonathan P CelliTayyaba Hasan
Nov 9, 2010·Chemical Reviews·Millicent B Smith, Josef Michl
Nov 26, 2010·Organic Letters·Nagappanpillai AdarshDanaboyina Ramaiah
Jun 3, 2011·The Journal of Physical Chemistry. a·Michael T ColvinMichael R Wasielewski
Jul 1, 2011·Chemistry : a European Journal·Paola Ceroni
Mar 1, 2012·Physical Chemistry Chemical Physics : PCCP·Angelo MonguzziFrancesco Meinardi
Mar 1, 2012·Journal of Computational Chemistry·Angelo Domenico QuartaroloNino Russo
Sep 28, 2012·Chemical Society Reviews·Anyanee KamkaewKevin Burgess
Mar 2, 2013·Chemical Society Reviews·Jianzhang ZhaoSong Guo
Mar 21, 2013·Chemical Reviews·Christopher K PrierDavid W C MacMillan
Apr 12, 2013·Angewandte Chemie·Durga Prasad Hari, Burkhard König
Oct 1, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Ben A LlewellynNeil R Champness
Apr 17, 2014·Chemistry : a European Journal·Hui HeDennis K P Ng
May 27, 2015·The Journal of Physical Chemistry. B·Scott M DyarMichael R Wasielewski
Oct 16, 2015·Chemical Society Reviews·Jianzhang ZhaoFangfang Zhong
Feb 9, 2016·Chemistry : a European Journal·Hongbing FuJiannian Yao
Apr 26, 2018·Organic & Biomolecular Chemistry·Jianzhang ZhaoDianzeng Jia
Jun 29, 2018·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Yusuke KuramochiAkiharu Satake
Sep 4, 2019·Chemistry : a European Journal·Yoshio Teki
Oct 3, 2019·Journal of the American Chemical Society·Van-Nghia NguyenJuyoung Yoon
Oct 10, 2019·Chemistry : a European Journal·Mushraf HussainMariangela Di Donato

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Citations

May 26, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jasper DeckersWouter Maes
Jul 8, 2021·The Journal of Physical Chemistry Letters·Yuri E Kandrashkin

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