The Ground State of Multispin Systems Based on Verdazyl and Nitrene Radicals: An EPR and Quantum-Chemical Study; The Journal of Physical Chemistry A; Vol. 129, iss. 7

The Ground State of Multispin Systems Based on Verdazyl and Nitrene Radicals: An EPR and Quantum-Chemical Study

Chi tiết về thư mục
Parent link:	The Journal of Physical Chemistry A.— .— Washington: ACS Publications Vol. 129, iss. 7.— 2025.— P. 1808-1816
Tác giả khác:	Shmakov A. S. Alexandr, Shurikov M. K. Matvey Konstantinovich, Korchagin D. V. Denis, Votkina D. E. Darjya Evgenjevna, Postnikov P. S. Pavel Sergeevich, Akimov A. V. Aleksander, Petunin P. V. Pavel Vasilievich, Tretyakov E. V. Evgeny
Tóm tắt:	Title screen In this study, low-temperature EPR spectroscopy and quantum-chemical techniques were employed to investigate multispin systems─1,5-diphenyl-3-(3-nitrenophenyl)-6-oxoverdazyl and 1,5-diphenyl-3-(4-nitrenophenyl)-6-oxoverdazyl─that contain a nitrene center at either a meta- or para-position, respectively. Ground states and magnetic zero-field splitting (ZFS) parameters of these multispin systems were determined by experimental and computational methods. The results indicated that the high-spin quartet state is a ground state, and the quartet–doublet energy gap is close to 10 kcal/mol for the para-position of the nitrene group, with ZFS parameters D = 0.292 cm–1 and E/D = 0.002 cm–1. In contrast, for the meta-position, the low-spin doublet state is favored with an energy gap of 1 kcal/mol. The observed difference in the ground states could be qualitatively explained by an analysis of the spin density distribution and by delocalization of the unpaired π-electron of the nitrene center. Overall, this study provides valuable insights into the electronic structures and magnetic parameters of such multispin systems Текстовый файл AM_Agreement
Ngôn ngữ:	Tiếng Anh
Được phát hành:	2025
Những chủ đề:	труды учёных ТПУ электронный ресурс
Truy cập trực tuyến:	https://doi.org/10.1021/acs.jpca.4c06823
Định dạng:	Điện tử Chương của sách
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=679747

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