Spin Transition Molecular Materials for displays and data recording

Abstract

The development of recording media based on molecular spin‐transition (ST) materials is discussed and applications demonstrated for the first time. The figure shows a compound which exhibits an ST and which is based on Fe II and 1,2,4‐triazole units. The central Fe II ion undergoes an ST at around 210 K which is accompanied by a purple‐white color change. Requirements for future progress are reviewed. magnified image