Issue 30, 2015

Intermediate-paramagnetic phases with a half and a quarter spin entities in fluorinated biphenyl-3,5-diyl bis(tert-butyl nitroxides)

Abstract

A new ground-triplet biradical, 2′,5′-difluorobiphenyl-3,5-diyl bis(tert-butyl nitroxide), showed spin-transition-like behaviour at TC↑ = 182 K and TC↓ = 181 K. This compound had a quarter of the nominal amount of paramagnetic spins in the low-temperature phase and a half in the high-temperature phase. Another new 3′-monofluoro derivative maintained a half amount of the spins as a single solid phase, which is isomorphous to the high-temperature phase of the difluoro analogue. During the spin transition, a reversible bond formation–cleavage between nitrogen and oxygen atoms takes place at neighbouring nitroxide groups in an intermolecular fashion. These intermediate states emerge during multi-step spin transition from the unsymmetrical biradicals as designed.

Graphical abstract: Intermediate-paramagnetic phases with a half and a quarter spin entities in fluorinated biphenyl-3,5-diyl bis(tert-butyl nitroxides)

Supplementary files

Article information

Article type
Paper
Submitted
09 mrt 2015
Accepted
04 apr 2015
First published
08 apr 2015

J. Mater. Chem. C, 2015,3, 7813-7818

Author version available

Intermediate-paramagnetic phases with a half and a quarter spin entities in fluorinated biphenyl-3,5-diyl bis(tert-butyl nitroxides)

T. Konno, H. Kudo and T. Ishida, J. Mater. Chem. C, 2015, 3, 7813 DOI: 10.1039/C5TC00668F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements