A Weakly Antiferromagnetically Coupled Biradical Combining Verdazyl with Nitronylnitroxide Units

A Weakly Antiferromagnetically Coupled Biradical Combining Verdazyl with Nitronylnitroxide Units

書誌詳細
Parent link:ChemPluscHhem
Vol. 85, iss. 1.— 2019.— [P. 159-162]
団体著者: Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра технологии органических веществ и полимерных материалов (ТОВПМ)
その他の著者: Petunin P. V. Pavel Vasilievich, Rybalova T. A. Tatjyana Valerjevna, Trusova M. E. Marina Evgenievna, Uvarov M. N. Mikhail Nikolaevich, Kazantsev M. S. Maksim Sergeevich, Mostovich E. A. Evgeny Alekseevich, Postulka L. Lars, Eibisch P. Paul, Wolf B. Bernd, Lang M. Michael, Postnikov P. S. Pavel Sergeevich, Baumgarten M. Martin
要約:Title screen
An antiferromagnetically (AFM) coupled biradical based on oxoverdazyl and nitronylnitroxide was synthesized in 46 % yield using Sonogashira coupling. The obtained heterobiradical evidenced distinct properties of both radical entities in solution. Depending on the solvent, the prepared biradical crystallized in two different forms. SQUID magnetization measurements on Form II showed coupling constants JintraII/kB=-2.1 K and zJinterII/kB=-11.5 K. Consequently, total intermolecular exchange interactions are five times larger than the intramolecular ones. Further, DFT calculations explained this phenomenon and indicated the advantage of Form I for further in depth investigations.
Режим доступа: по договору с организацией-держателем ресурса
出版事項: 2019
主題:
электронный ресурс
труды учёных ТПУ
бирадикалы
растворы
обменные взаимодействия
кристаллизация
オンライン･アクセス:https://doi.org/10.1002/cplu.201900709
フォーマット: 電子媒体 図書の章
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663832
その他の書誌記述
要約:Title screen
An antiferromagnetically (AFM) coupled biradical based on oxoverdazyl and nitronylnitroxide was synthesized in 46 % yield using Sonogashira coupling. The obtained heterobiradical evidenced distinct properties of both radical entities in solution. Depending on the solvent, the prepared biradical crystallized in two different forms. SQUID magnetization measurements on Form II showed coupling constants JintraII/kB=-2.1 K and zJinterII/kB=-11.5 K. Consequently, total intermolecular exchange interactions are five times larger than the intramolecular ones. Further, DFT calculations explained this phenomenon and indicated the advantage of Form I for further in depth investigations.
Режим доступа: по договору с организацией-держателем ресурса
DOI:10.1002/cplu.201900709

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