Striking effects of halogen substituents on the glass-forming properties, glass-transition temperatures and stabilities of the glassy state of a new family of amorphous molecular materials, 1,3,5-tris(4-halogenophenylphenylamino) benzenes

Abstract

A new class of π-electron starburst molecules, l,3,5-tris(4-halogenophenylphenylamino) benzenes, are synthesized for use as amorphous molecular materials. It was found that they readily form amorphous glasses, whereas the parent compound l,3,5-tris(diphenylamino)benzene instantly crystallizes and that the ease of glass formation, glass-transition temperature, and stability of the glassy state are greatly affected by the type of halogen substituent.