Paper published by Brammer group highlighted in IUCrJ.
Recent work by the Brammer group describes chemical transformations within crystalline solids that can be followed by X-ray diffraction. The study was published, and highlighted with an accompanying commentary article, in IUCrJ, the flagship journal of the International Union of Crystallography.
Much of the experimental work was carried out by PhD student James Wright and involved in situ X-ray powder diffraction studies conducted at the synchrotron X-ray facilities at Diamond Light Source, nr. Oxford and the European Synchrotron Radiation Source (Grenoble, France). Most remarkable is that the chemical and structural changes are observed in crystals, which are often (incorrectly) viewed as being almost static entities.
The study demonstrates chemical transformations of materials known as coordination polymers, which comprise metal centres, in this case Ag(I), linked by organic ligands. The coordination sphere of the metal centres changes during the transformation, through loss of weakly bound arene ligands, which trigger new bond formation and/or significant structural rearrangement. The work provides support for development of new responsive crystalline materials.
Links to the work:
“Solvent-vapour-assisted pathways and the role of pre-organization in solid-state transformations of coordination polymers,” James S. Wright, Iñigo J. Vitórica-Yrezábal, Harry Adams, Stephen P. Thompson, Adrian H. Hill and Lee Brammer, IUCrJ, 2015, 2, 188-197.