Dynamic Control of Molecular Functions via Time-Dependent External Stimuli

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We designed large artificial molecules that respond to external stimuli, prepared them via organic synthesis, and studied their properties by spectroscopic measurements and molecular simulations. The following progress was made: - We established synthetic strategy for tweezers-like molecules that have two different porphyrins at both ends. - We successfully introduced positive and negative charges at the both ends of the above-mentioned tweezers-like molecules. - We analyzed the behavior of the above molecules in solutions via fluorescence emission spectra, and found that the average conformations were dependent on the bridging part. - We performed computer simulations of the above molecules, and found new design for better observation of the conformational change by external stimuli.