Reversible Pressure‐Controlled Depolymerization of a Copper(II)‐Containing Coordination Polymer. Issue 51 (16th August 2017)

• Record Type: Journal Article
• Authors: Clegg, Jack K.; Brock, Aidan J.; Jolliffe, Katrina A.; Lindoy, Leonard F.; Parsons, Simon; Tasker, Peter A.; White, Fraser J.
• Is Part Of: Chemistry. Volume 23:Issue 51(2017)
• Page Start: 12480
• Page End: 12483
• Publication Date: 2017-08-16
• Subjects: coordination polymer -- copper -- high-pressure chemistry -- stimuli responsive -- X-ray structure; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201703115
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A unique pressure‐induced Cu−N bond breaking/bond forming reaction is reported. The variation of pressure on a single crystal of a one‐dimensional copper‐ (II)‐containing coordination polymer (Cu2 L2 (1‐methylpiperazine)2 ] n, where H2 L is 1, 1′‐(1, 3‐phenylene)‐bis(4, 4‐dimethylpentane‐1, 3‐dione)), was monitored using single crystal X‐ray diffraction with the aid of a diamond anvil cell. At a very low elevated pressure (≈0.05 GPa) a remarkable reversible phase change was observed. The phase change results in the depolymerization of the material through the cleavage and formation of axial Cu−N bonds as well as "ring flips" of individual axially coordinated 1‐methylpiperazine ligands. Overall, the pressure‐induced phase change is associated with a surprising (and non‐intuitive) shift in structure‐from a 1‐dimensional coordination polymer to a discrete dinuclear complex. Abstract : Under pressure : The application of elevated pressure to single crystals of a copper(II)‐containing coordination polymer induces a reversible depolymerization reaction and single‐crystal single‐crystal transformation.