X-Ray Absorption Spectroscopy structural studies of Cu complexes containing the hydrophilic phosphine-based ligands

none6The project was aimed to the study the local atomic arrangement of the copper(I) atom in a series of phosphine metal complexes of the type [Cu(P)n]+ , namely [Cu(thp)4][PF6]; [Cu(bhpe)2][PF6]; [Cu(PTA)4](BF4); Cu(mPTA)4][(CF3SO3)4(PF6)] using a series of XAS spectra taken at a different concentration. Solutions at four or five different concentration (between 0.05-1 mM) were prepared in the Chemistry Lab, and recorded at the BM08(which also provides sagittally focused beam) in order to investigate the possible dissociation in solution which leads to less coordinated [Cu(P)n]+ species (n = 2, 3), as postulated by recent studies. Due the high dilution, measurements have been be carried out in fluorescence mode and using the 13-elements high-purity Ge fluorescence detector available at the BM08. A suitable cell for solution (from the University of Bologna) was used and placed appropriately at the beamline. The solution samples will be kept in cells with kapton windows and measured at ambient temperature. In addition, solid samples to be used as a reference for the coordination geometry of Cu(I) have been also measured in transmission mode at ambient temperaturenoneM. Giorgetti; A. Trapananti; F. Tisato; M. Minicucci; G. Aquilanti; C. SantiniM. Giorgetti; A. Trapananti; F. Tisato; M. Minicucci; G. Aquilanti; C. Santin