Synthesis and photoinduced behavior of DPP-anchored nitronyl nitroxides: a multifaceted approach
Synthesis and photoinduced behavior of DPP-anchored nitronyl nitroxides: a multifaceted approach
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DPP 锚定硝基硝基氧的合成和光诱导行为:多方面的方法
DOI:
10.1039/d4ra00916a
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发表时间:
2024
期刊:
影响因子:
3.9
通讯作者:
Tretyakov E
中科院分区:
文献类型:
--
作者:
Tretyakov E
Understanding and controlling spin dynamics in organic dyes is of significant scientific and technological interest. The investigation of 2,5-dihydropyrrolo[4,3-c]pyrrolo-1,4-dione derivatives (DPPs), one of the most widely used dyes in many fields, has so far been limited to closed-shell molecules. We present a comprehensive joint experimental and computational study of DPP derivatives covalently linked to two nitronyl nitroxide radicals (DPPTh-NN2). Synthesis, single crystal X-ray diffraction study, photophysical properties, magnetic properties established using steady-state and pulse EPR, fast spin dynamics, and computational modelling using density functional theory and ab initio methods of electronic structure and spectroscopic properties of DPPTh-NN2 are presented. The single-crystal X-ray diffraction analysis of DPPTh-NN2 and computational modeling of its electronic structure suggest that effective conjugation along the backbone leads to noticeable spin-polarization transfer. Calculations using ab initio methods predict a weak exchange interaction of radical centers through a singlet ground state of DPPTh with a small singlet–triplet splitting (ΔEST) of about 25 cm−1 (∼0.07 kcal mol−1). In turn, a strong ferromagnetic exchange interaction between the triplet state of DPPTh chromophore and nitronyl nitroxides (with J ∼ 250 cm−1) was predicted.
DOI:
10.1021/acs.joc.0c02613
发表时间:
2021
期刊:
The Journal of organic chemistry
影响因子:
--
作者:
R. Rausch;A.-M. Krause;I. Krummenacher;H. Braunschweig;F. Würthner
通讯作者:
F. Würthner
DOI:
--
发表时间:
2018
期刊:
Journal of magnetic resonance (San Diego, Calif. 1997 : Print)
影响因子:
--
作者:
S. Veber;S. Tumanov;E. Fursova;O. Shevchenko;Y. Getmanov;M. Scheglov;V. Kubarev;D. Shevchenko;I. I. Gorbachev;T. V. Salikova;G. Kulipanov;V. Ovcharenko;M. Fedin
通讯作者:
M. Fedin
影响因子:
3.8
作者:
A. Serykh;E. Tretyakov;P. Fedyushin;B. Ugrak;T. Dutova;A. Lalov;Alexander Korlyukov;A. Akyeva;M. Syroeshkin;A. Bogomyakov;G. Romanenko;N. Artiukhova;M. Egorov;V. Ovcharenko
通讯作者:
V. Ovcharenko