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Cover Feature: Efficient Radical‐Enhanced Intersystem Crossing in an NDI‐TEMPO Dyad: Photophysics, Electron Spin Polarization, and Application in Photodynamic Therapy (Chem. Eur. J. 70/2018)
Author(s) -
Wang Zhijia,
Gao Yuting,
Hussain Mushraf,
Kundu Sushma,
Rane Vinayak,
Hayvali Mustafa,
Yildiz Elif Akhüseyin,
Zhao Jianzhang,
Yaglioglu Halime Gul,
Das Ranjan,
Luo Liang,
Li Jianfeng
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201805254
Subject(s) - intersystem crossing , photochemistry , chromophore , chemistry , dyad , photodynamic therapy , cover (algebra) , excited state , physics , atomic physics , mechanical engineering , organic chemistry , acoustics , singlet state , engineering
A stable radical (2,2,6,6‐tetramethylpiperidinyloxy; TEMPO) was labeled with the visible‐light‐harvesting chromophore naphthalenediimide (NDI) to give an NDI‐TEMPO dyad. A detailed photophysical study shows efficient radical enhanced intersystem crossing (EISC; 74%), long‐lived triplet state of NDI (8.7 μs), quartet state formation (spin quantum number, S =3/2), and inversion of the electron spin polarization. This red‐light absorption, heavy‐atom‐free dyad NDI‐TEMPO has been used in photodynamic therapy, and hence opens new avenues of real applications of EISC systems. More information can be found in the Full Paper by J. Zhao, H. G. Yaglioglu, R. Das, L. Luo, J. Li, et al. on page 18663.