γ-Cyclodextrin Functionalized Supramolecular Architectured Molecular Logic Functions and Password Security System Powered by pH

Abstract

In the recent past, optical detection devices have become an analytical tool of attention in diverse meadows of science. The search for new ways to recognize and measure diverse phase of compounds has converted this inquisitiveness into a requisite. Molecules that can be toggled by pH have played a significant role in the construction, progress, and manifestation of molecular logic. Usually, pH responsive molecules are switched between bistable/multistable states (different chemical structures) through variation in pH. In our previous studies, 3,3′-bis-indolyl(phenyl)methane (BIPM) molecules in water were found to form large molecular self-aggregates that disaggregated in presence of γ-cyclodextrin molecules through inclusion complexation. In the present study, we propose a unique angle on pH-triggered logic—that is, to use different input and output channels enabled by nonlinear optical processes. We visualize that photo-induced dynamics (self-assemble to disassemble and reassemble) in a γ-CD functionalized supramolecular compound initiated and the observable change by altering pH can offer a stage for installing and processing logic operations. The phenomena of self-assemble to disassemble and re-Iassemble was confirmed by fluorescence anisotropy and scanning electron microscopy (SEM). This new type idea has thrilling potential, as well as several attractive challenges.