Octahedral rhodium hydrido phosphine clusters result from the treatment of [Rh(nbd)(PR3)2][BarF 4] with H2. Not only do these late transition metal clusters have unique structures and a remarkably large number of hydride ligands, but they also reversibly take up and release two molecules of dihydrogen under ambient conditions to give [Rh6(PR3)6H16][Ba rF4]2. They serve as models for metal surfaces covered in hydrogen, nanoparticle rhodium hydrogenation catalysts, and hydrogen storage materials. Synthetic (including cluster build-up mechanism), structural, and theoretical (DFT calculations) aspects of these clusters were presented along with recent experimental results that show that these molecular clusters can be electrochemically switched on and off to both capture and release dihydrogen under ambient conditions. Thus, suggesting the possibility of electrochemically switchable molecular hydrogen storage devices. This is an abstract of a paper presented at the 231st ACS National Meeting (Atlanta, GA 3/26-30/2006).
ASJC Scopus subject areas
- Chemical Engineering(all)