Spin Transfer and Solvato-/Thermochromism Induced by Intramolecular Electron Transfer in a Purely Organic Open-Shell System

摘要

In search of organic functional materials,investigators have focused much attention on the switching of physical properties by using appropriate perturbation or stimuli.The integration of multiple controllable properties into a single-component system has been the subject of growing interest.Among such examples are the photoswitching of magnetic interaction by using a photochromic reaction and thermal bistability in electric,magnetic,and optical properties of a crystalline neutral radical.To realize spin-mediated new responsive materials,we are interested in reversible intramolecular electron transfer (IET),which can cause a complete transformation of magnetic and electronic properties in a purely organic system.In an attempt to embody this concept,we have examined a stable neutral radical comprising electron-donor and -acceptor moieties,both of which can have spin before and after IET.