TY - JOUR
T1 - Radical and Diradical Formation in Naphthalene Diimides through Simple Chemical Oxidation
AU - Lee, Sangsu
AU - Miao, Fang
AU - Phan, Hoa
AU - Herng, Tun Seng
AU - Ding, Jun
AU - Wu, Jishan
AU - Kim, Dongho
N1 - Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/3/17
Y1 - 2017/3/17
N2 - We successfully synthesized, for the first time, a naphthalene diimide (NDI) radical and diradical by simple chemical oxidation using lead(IV) dioxide. The formation of the (di)radical is confirmed by UV/Vis/NIR absorption, 1H NMR, and electron paramagnetic resonance (EPR) measurements. In particular, temperature-dependent EPR, SQUID (superconducting quantum interference device) measurements, and quantum calculations demonstrated that the generated NDI diradical has a singlet diradical character of y=0.69 in the ground state. Subsequent characterization of this (di)radical revealed its stabilities, large two-photon absorption cross-section, and short excited-state lifetime.
AB - We successfully synthesized, for the first time, a naphthalene diimide (NDI) radical and diradical by simple chemical oxidation using lead(IV) dioxide. The formation of the (di)radical is confirmed by UV/Vis/NIR absorption, 1H NMR, and electron paramagnetic resonance (EPR) measurements. In particular, temperature-dependent EPR, SQUID (superconducting quantum interference device) measurements, and quantum calculations demonstrated that the generated NDI diradical has a singlet diradical character of y=0.69 in the ground state. Subsequent characterization of this (di)radical revealed its stabilities, large two-photon absorption cross-section, and short excited-state lifetime.
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U2 - 10.1002/cphc.201700015
DO - 10.1002/cphc.201700015
M3 - Article
C2 - 28078728
AN - SCOPUS:85011339277
VL - 18
SP - 591
EP - 595
JO - ChemPhysChem
JF - ChemPhysChem
SN - 1439-4235
IS - 6
ER -