A photochromic molecule-based magnet

Authors
Benard, S Riviere, E Yu, P Nakatani, K Delouis, JF
Citation
S. Benard et al., A photochromic molecule-based magnet, CHEM MATER, 13(1), 2001, pp. 159-162
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
CHEMISTRY OF MATERIALS
ISSN journal
08974756 → ACNP
Volume
13
Issue
1
Year of publication
2001
Pages
159 - 162
Database
ISI
SICI code
0897-4756(200101)13:1<159:APMM>2.0.ZU;2-H
Abstract
A molecule-based magnet of formula (SP)MnCr(ox)(3).H2O has been synthesized , where SP+ stands for a new N-methylated pyridospiropyran cation and ox(2- ) represents the oxalate anion. The compound orders ferromagnetically at 5. 5 K and exhibits crystalline-state photochromism. The main spectrokinetic d ata of the UV-induced open form of SP+ are strongly modified in (SP)MnCr(ox )(3).H2O as compared to those found in (SP)I. The reversible photoreaction of SP+ does not modulate the critical temperature of the long-range ferroma gnetic order in (SP)MnCr(ox)(3).H2O but modifies in a significant way its h ysteresis loop.