Hypersensitive pressure-dependence of the conversion temperature of hysteretic valence tautomeric manganese-nitronyl nitroxide radical 2D-frameworks.

Constance Lecourt,Cédric Desroches,Yuuta Izumi,Kseniya Maryunina,Katsuya Inoue,Christian Reber,Nicolas Bélanger-Desmarais,Dominique Luneau

doi:10.1039/d0cc08144b

Abstract

Valence tautomeric manganese(ii)-radical lamellar compounds {[Mn2(NITIm)3]X}n with NITIm a nitronyl nitroxide radical and X = ClO4- (1) or BF4- (2) show a pressure-induced increase of their conversion temperature by approximately 40 K at a mild external pressure of 0.1 GPa, shifting the transition from near room temperature to hot temperature regions.

Highlights

Constance Lecourt, a Yuuta Izumi,b Kseniya Maryunina, bc Katsuya Inoue, b Nicolas Belanger-Desmarais,d Christian Reber, d Cedric Desroches a and Dominique Luneau *a
They are useful to gain better, broad-based insight on fundamental phenomena such as intramolecular electron transfer processes and their relationships with particular solidstate rearrangements.[2]. These compounds are of interest for technological applications as switches, sensors or in signal processing and information storage devices.[3]. New examples among these magnetic molecular switches are valence tautomeric (VT) coordination compounds with intramolecular electron transfers between metal ions and redox-active ligands that cause switching between different redox tautomer forms.[4]
Most VT compounds are based on dioxolene derivatives as redoxactive ligands[4,7,14] and only a few examples use free radicals such as verdazyl[15] or nitronyl nitroxide, as in manganese coordination compounds we recently documented.[16,17]

Summary

Introduction

Constance Lecourt, a Yuuta Izumi,b Kseniya Maryunina, bc Katsuya Inoue, b Nicolas Belanger-Desmarais,d Christian Reber, d Cedric Desroches a and Dominique Luneau *a. Valence tautomeric manganese(II)-radical lamellar compounds {[Mn2(NITIm)3]X}n with NITIm a nitronyl nitroxide radical and X = ClO4À (1) or BF4À (2) show a pressure-induced increase of their conversion temperature by approximately 40 K at a mild external pressure of 0.1 GPa, shifting the transition from near room temperature to hot temperature regions.

Results

Conclusion