Manipulation of successive crystalline transformations to control electron transfer and switchable functions

• 来源期刊: 国家科学评论（英文版）
• 关键词: electron-transfer dynamic structural transformation successive crystalline transformations reversible polymorphs
• 年，卷（期）: 2018,（4）
• 页码范围: 507-515
• 页数: 9页
• 语种: 英文
• DOI: 10.1093/nsr/nwy033

摘要

Electron transfer in solid is crucial to switchable magnetic,electrical,optical and mechanical properties.However,it is a formidable challenge to control electron-transfer behaviors via manipulation of crystalline phases,especially through dynamic crystalline transformation.Herein,three crystalline phases of an {Fe2Co2} compound were obtained via enhancement ofintermolecular π…π interactions inducing successive single-crystal-to-single-crystal transformations,from solvated 1·2CH3OH·4H2O,to desolvated 1 and its polymorph 1 a accompanying electron transfer.1-2CH3OH·4H2O showed thermally induced reversible intermetallic electron transfer in mother liquor.No electron-transfer behavior was observed in 1.1a showed reversible intermetallic electron transfer upon thermal treatment or alternative irradiation with 808-and 532-nm lasers at cryogenic temperatures.The electron-transfer behaviors significantly change the magnetic and optical properties,providing a strategy to realize different electron-transfer behaviors and switchable functions via π…π interactions manipulated dynamic crystalline transformation.