Amorphous–amorphous transition in a porous coordination polymer. Issue 52 (16th June 2017)

• Record Type: Journal Article
• Authors: Ohtsu, Hiroyoshi; Bennett, Thomas D.; Kojima, Tatsuhiro; Keen, David A.; Niwa, Yasuhiro; Kawano, Masaki
• Is Part Of: Chemical communications. Volume 53:Issue 52(2017)
• Page Start: 7060
• Page End: 7063
• Publication Date: 2017-06-16
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc03333h
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The amorphous state plays a key role in porous coordination polymer and metal–organic framework phase transitions. Abstract : The amorphous state plays a key role in porous coordination polymer and metal–organic framework phase transitions. We investigate a crystalline-to-amorphous-to-amorphous-to-crystalline (CAAC) phase transition in a Zn based coordination polymer, by X-ray absorption fine structure (XAFS) and X-ray pair distribution function (PDF) analysis. We show that the system shows two distinct amorphous phases upon heating. The first involves a reversible transition to a desolvated form of the original network, followed by an irreversible transition to an intermediate phase which has elongated Zn–I bonds.