THERMOGRAVIMETRIC, 31P NMR AND MASS SPECTROMETRIC STUDIES OF Cu(I) AMINOPHOSPHINE COMPLEXES

Abstract

Different Cu(I) halides complexes of two different aminophosphines, viz, {Bis (isopropyl) amino}(morpholino)(Phenyl) phosphine (L) and Bis (morpholino) (phenyl) phosphine (L') have been reported earlier. Thermogravimetric studies of these metal complexes showed that the metal bound aminophosphine ligand is lost easily on heating, at moderate temperatures. In most cases, stepwise loss of the ligand is observed. Electrospray ionization mass spectroscopy (ESI MS), also confirms the easy loss of aminophosphine ligands. Mass spectra reveal ligand peak was observed with high intensity in all the cases. The isotopic pattern was also observed due to the presence of different isotopes ( 63 Cu, 65 Cu, 35 Cl, 37 Cl, 79 Br and 81 Br). A comparison of donor-acceptor behavior of two ligands was also made from their 31 P coordination chemical shifts. Initial results show promise for the use these complexes as precursors for chemical vapor deposition (CVD) for the production of thin metal/metal oxide layers.