Adaptive and Guest Responsive Supramolecular Porous Framework: Solvent Modulated Energy Transfer toward Fingerprint Sensing

A solvent responsive, dynamic, three-dimensional supramolecular porous host has been synthesized and structurally characterized. The structural flexibility is realized by the guest responsive structural transformation and also by the different gas and solvent vapor adsorption studies. Noncovalent encapsulation of fluorescein dye into the framework resulted in dual emission through host-to-guest partial energy transfer which is utilized for solvent sensing. Diffusion of solvents modulates the structural arrangement and energy transfer.