The development of efficient molecular photocatalytic systems for water reduction to molecular hydrogen and production of high-value organic molecules is the main aim of this thesis. The use of homogeneous coordination metal complexes for hydrogen production have expanded but the structural factors to control the reactivity and selectivity are not well understood. The light-driven reduction of organic molecules performed under mild conditions is limited and mostly catalyzed by noble metals. Therefore, synergistic merging of a photocatalyst and well-defined coordination metal complex enable the efficient photocatalytic synthesis of fuels together with their storage and reduction of organic molecules. In this regard, rational design and architecture of water-soluble catalyst based on earth-abundant elements is important to control these transformations.
Chemical hydrogen storage are predominant technologies to store and release hydrogen from the storage material through a chemical reaction. Chemical compounds containing hydrogen as methanol, ammonia and methyl cyclohexane can also be considered a kind of hydrogen storage. In this regard, using chemical compounds as a storage material for hydrogen has clear advantage comparing with gaseous hydrogen, which requires leak-proof, preferably seamless piping and vessels. Various types of hydrogen storages have been developed, however they demand high temperature and energy. Moreover, the dehydrogenation process in many cases release highly environmentally unfavorable products. Consequently, new robust catalysts able to store hydrogen in chemical compounds are required as well as effective processes to implement the compounds successfully as practical hydrogen storage materials.
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