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

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Date of Publication:2018-07-01

Journal:NATIONAL SCIENCE REVIEW

Included Journals:SCIE

Volume:5

Issue:4

Page Number:507-515

ISSN No.:2095-5138

Key Words:electron-transfer; dynamic structural transformation; successive crystalline transformations; reversible; polymorphs

Abstract: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 of intermolecular pi center dot center dot center dot pi interactions inducing successive single-crystal-to-single-crystal transformations, from solvated 1 center dot 2CH(3)OH center dot 4H(2)O, to desolvated 1 and its polymorph la accompanying electron transfer. 1 center dot 2CH(3)OH center dot 4H(2)O showed thermally induced reversible intermetallic electron transfer in mother liquor. No electron-transfer behavior was observed in 1. la 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 pi center dot center dot center dot pi interactions manipulated dynamic crystalline transformation.