Pressure- and Temperature-Induced Valence Tautomeric Interconversion in a o-Dioxolene Adduct of a Cobalt–Tetraazamacrocycle Complex

✍ Scribed by Andrea Caneschi; Andrea Dei; Fabrizia Fabrizi de Biani; Philipp Gütlich; Vadim Ksenofontov; George Levchenko; Andreas Hoefer; Franz Renz

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 113 KB
• Volume: 7
• Category: Article
• ISSN: 0947-6539
• DOI: 10.1002/1521-3765(20010917)7:18<3926::aid-chem3926>3.0.co;2-6

✦ Synopsis

An electronic switch at the molecular level has been realized by using a class of ionic compounds of the formula [Co(L)(diox)]Y (L tetraazamacrocyclic ligand, Y mononegative anion). Such compounds undergo temperature-and pressure-induced intramolecular one-electron transfer equilibria. The transition temperature of interconversion varies with the nature of the counterions Y (Y PF 6 , BPh 4 , I). Surprisingly the effect of the anion on the transition temperature is not only governed by its volume but also by its coulombic interaction.