Ferromagnetically Coupled S=1 Chains in Crystals of Verdazyl-Nitronyl Nitroxide Diradicals / E. V. Tretjyakov, S. I. Zhivetjeva, P. V. Petunin [et al.]
Уровень набора: Angewandte Chemie International EditionЯзык: английский.Страна: .Резюме или реферат: Thermally stable organic diradicals with a triplet ground state along with large singlet-triplet energy gap have significant potential for advanced technological applications. A series of phenylene-bridged diradicals with oxoverdazyl and nitronyl nitroxide units were synthesized via a palladium-catalyzed cross-coupling reaction of iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields. The diradicals exhibit high stability and do not decompose in an inert atmosphere up to 180?°C. For the diradicals, both substantial AF (?EST-64 cm-1) and FM (?EST=25 and 100 cm-1) intramolecular exchange interactions were observed. The sign of the exchange interaction is determined both by the bridging moiety (para- or meta-phenylene) and by the type of oxoverdazyl block (C-linked or N-linked). Upon crystallization, diradicals with the triplet ground state form unique one-dimensional exchange-coupled chains with strong intra- and weak inter-diradical ferromagnetic coupling..Примечания о наличии в документе библиографии/указателя: [References: 9 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | BS-DFT and high level calculations | ferromagnetic chain | high-spin molecules | nitroxides | triplet diradicals | ферромагнитные цепи Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: 9 tit.]
Thermally stable organic diradicals with a triplet ground state along with large singlet-triplet energy gap have significant potential for advanced technological applications. A series of phenylene-bridged diradicals with oxoverdazyl and nitronyl nitroxide units were synthesized via a palladium-catalyzed cross-coupling reaction of iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields. The diradicals exhibit high stability and do not decompose in an inert atmosphere up to 180?°C. For the diradicals, both substantial AF (?EST-64 cm-1) and FM (?EST=25 and 100 cm-1) intramolecular exchange interactions were observed. The sign of the exchange interaction is determined both by the bridging moiety (para- or meta-phenylene) and by the type of oxoverdazyl block (C-linked or N-linked). Upon crystallization, diradicals with the triplet ground state form unique one-dimensional exchange-coupled chains with strong intra- and weak inter-diradical ferromagnetic coupling.
Для данного заглавия нет комментариев.