Download or read book The Chemistry of Transition Metal Complexes Related to Solar Energy Storage written by Changhoon Lee (Ph. D.) and published by . This book was released on 2011 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies in this thesis have focused on the chemistry of transition metal complexes related to solar energy storage: electrochemical H2 production, HX splitting and CO2 activation mediated by transition metal complexes. Transition metal complexes, for example with macrocyclic ligands, can catalyze electrochemical proton reduction, a half reaction of water splitting to H2/O2 by electricity generated by sunlight. The strategy for designing efficient molecular catalysts were explored by introducing a Hangman scaffold into metallomacrocyles. The study exhibits synthesis and electrochemistry of metallomacrocyles, and an example of Hangman effect for electrochemical H2 production. Thermodynamically demanding HX splitting to H2/X2 by sunlight can be a promising method for solar energy storage. To date, most HX splitting chemistry was studied with metal complexes based on 2"d or 3 rd row transition metals. Hence, the usage of cheaper first row metals is an imperative to discover economically viable catalytic systems. HX chemistry of Ni complexes and photoelimination of H2 from Ni hydride complexes, and photoactivation of Ni-Cl bonds were studied. CO2 can be utilized as a carrier of H2 by the syntheses of liquid fuels from CO2 and H2. The challenge of using CO2 as a precursor for organic molecules is the activation of strong O=CO bonds. The reaction with metal complexes is one of the methods to break or weaken the bonds. The CO2 chemistry of Ni complexes was explored, and generation of a new binding mode of CO2 and activation of CO2 to CO were studied.