As a preliminary test to estimate the potential use as SSP, with respect to the intrinsic reducing capability of the Al hydrides upon exposure to thermal stress (elevated temperatures), the compounds were heated in a Schlenk tube under vacuum (~1x10 -2 mbar). These conditions were chosen to mimic the conditions in vapor phase deposition processes, where the precursor is decomposed thermally, either via substrate heating (CVD) or from energy assisted deposition techniques such as plasma enhanced (PE-) or photo assisted ALD. Figure shows the representative compounds amongst each group (compounds 2, 4 and 7), as synthesized and post-heating, as well as a powder X-ray diffractogram (XRD) of the metallic deposits collected as powder from the flask wall.