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

• Published in: European journal of inorganic chemistry 2022-07, Vol.2022 (21), p.n/a
• Main Authors: Pal, Poulami, Sahoo, Anik, Paul, Animesh, Baitalik, Sujoy
• Format: Article
• Language: English
• Subjects: Anions; Boolean algebra; Fluorescence spectroscopy; Fuzzy logic; Imidazole; Inorganic chemistry; Isomerization; Light irradiation; Logic operation; Molecular machines; Photoisomerization; Ruthenium-terpyridine; Sensor; Stilbene; Switches; Traffic signals; Ultraviolet radiation
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.202200219

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. Ru(II)‐terpyridine complexes possessing stilbene and bis‐benzimidazolyl‐pyridine units mimic multiple advanced Boolean and Fuzzy logic functions by using their spectral responses upon the action of light, acid and selected anions.