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A Weakly Antiferromagnetically Coupled Biradical Combining Verdazyl with Nitronylnitroxide Units Full article

Journal ChemPlusChem
ISSN: 2192-6506
Output data Year: 2020, Volume: 85, Number: 1, Pages: 159-162 Pages count : 4 DOI: 10.1002/cplu.201900709
Tags antiferromagnetism; multispin systems; magnetic properties; radicals; Sonogashira coupling
Authors Petunin Pavel, V 1,2 , Rybalova Tatyana, V 3,4 , Trusova Marina E. 1 , Uvarov Mikhail N. 4,5 , Kazantsev Maxim S. 3 , Mostovich Evgeny A. 4 , Postulka Lars 6 , Eibisch Paul 6 , Wolf Bernd 6 , Lang Michael 6 , Postnikov Pavel S. 1 , Baumgarten Martin 7
Affiliations
1 (Данные Web of science) Natl Res Tomsk Polytech Univ, Res Sch Chem & Appl Biomed Sci, 30 Lenin Ave, Tomsk 634050, Russia
2 (Данные Web of science) Siberian State Med Univ, Dept Chem, 2 Moskovskiy Trakt, Tomsk 634050, Russia
3 (Данные Web of science) Russian Acad Sci, NN Vorozhtzov Novosibirsk Inst Organ Chem, Siberian Branch, 9 Lavrentev Ave, Novosibirsk 630090, Russia
4 (Данные Web of science) Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia
5 (Данные Web of science) Russian Acad Sci, VV Voevodsky Inst Chem Kinet & Combust, Siberian Branch, 3 Inst Skaya Str, Novosibirsk 630090, Russia
6 (Данные Web of science) Goethe Univ Frankfurt, Phys Inst, 1 Max von Laue Str, D-60438 Frankfurt, Germany
7 (Данные Web of science) Max Planck Inst Polymer Res, 10 Ackermannweg, D-55128 Mainz, Germany

Abstract: 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 J(intraII)/k(B)=-2.1 K and zJ(interII)/k(B)=-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.
Cite: Petunin P.V. , Rybalova T.V. , Trusova M.E. , Uvarov M.N. , Kazantsev M.S. , Mostovich E.A. , Postulka L. , Eibisch P. , Wolf B. , Lang M. , Postnikov P.S. , Baumgarten M.
A Weakly Antiferromagnetically Coupled Biradical Combining Verdazyl with Nitronylnitroxide Units
ChemPlusChem. 2020. V.85. N1. P.159-162. DOI: 10.1002/cplu.201900709 WOS Scopus
Files: Full text from publisher
Dates:
Published print: Jan 1, 2020
Published online: Jan 14, 2020
Identifiers:
Web of science WOS:000513073500018
Scopus 2-s2.0-85077976247
OpenAlex W2996544244
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