Approach to Organic Ferromagnetic Metal Using Novel Twin-Donors

Abstract

Abstract Twin donors which have two BEDT-7TF units linked by alkanedithio bridge(s) have been prepared. Two types of radical ion salts of single methylenedithio-bridged donor 1 were obtained through electrocrystallization. Crystal A ·CIO4) exhibits antiferromagnetic interaction among phane-type conformers, while Crystal B (1·(CIO4)0.5) is semiconductor with an activation energy of 5 × 10-2 eV. The radical ion salt obtained from double ethylenedithio-bridged donor 5 (5·ClO4) is metallic down to 130K. The crystal structure is characterized by the presence of a unique three dimensional S···S network.