Anion and Light Responsive Molecular Switches Based on Stilbene‐Appended Ru(II) Terpyridyl‐Imidazole Complexes That Mimic Advanced Boolean and Fuzzy Logic Operations

Abstract

Ru(II) complexes comprising of a stilbene appended terpyridine motif and a pyridyl-bis-benzimidazole unit were utilized to mimic multiple Boolean and Fuzzy logic operations. Two imidazole NH motifs in the outer sphere of the complexes can lead to substantial variation of their spectral characteristics upon interaction with anions. We previously demonstrated that reversible trans-cis isomerization of the complexes upon UV light irradiation gives rise to substantial alteration in their absorption and emission spectral profiles. Here, the major objective is to mimic multiple Boolean logic operations (NOR and IMPLICATION gates) as well as complicated functions of key-pad lock, half-subtractor and traffic signal by using the spectral responses of the complexes upon the action of light, acid and a set of anionic inputs. Fuzzy logic is also implemented to fabricate an infinite-valued logic system based on their spectral outputs upon the action of multiple inputs.

Light-regulated morphology control in supramolecular polymers

“…Furthermore, light provides the added benefits of functional group specificity, wavelength control, instantaneous regulation of input/output, and high penetration ability which could directly influence the supramolecular polymerization in a comprehensive manner without destroying the functional motifs of the building blocks as a whole. 45 In the recent past, light has been utilized as a stimulus to assemble-disassemble supramolecular building blocks, 46,47 for artificial molecular switches and shuttles, [48][49][50] for regulation of drug delivery systems, 51,52 etc., 53,54 which have been discussed in detail in recent review articles. 33,45,46,[54][55][56][57][58][59] Herein, we mainly focus on the recent progress in precise morphology control and nanostructural alteration of supramolecular polymers via the influence of light irradiation.…”