PHOTO-ACTIVE AND REDOX-ACTIVE METALORGANIC FRAMEWORKS FOR SOLAR ENERGY UTILIZATION

摘要

Isomorphous metal-organic frameworks (MOFs) based on photo-active Ru(II) or Os(II) polypyridal complex building blocks were designed and synthesized for applications in light-harvesting. The Os doping level was systematically varied to experimentally determine relative rates of energy migration. Several structures demonstrated rapid excited state energy transfer and nano/microscale MOFs were synthesized. Suspensions of the MOF particles were quenched by both oxidative and reductive electron transfer reagents at the crystal-solution interface. The light harvesting characteristics of the MOFs allow them to be utilized as highly responsive sensors by an amplified quenching mechanism with the highest triplet excited state amplification in the literature and a 7000-fold enhancement in the Stern-Volmer quenching constant compared to a model complex. In this work the role of energy transfer dimensionality will be examined along with the use of MOFs as antennas for dye sensitized solar cells.