Multifunctional Logic Applications of a Single Molecule: A Molecular Photo‐Switch Performing as Simple and Complex Gates, Memory Element, and a Molecular Keypad Lock. Issue 19 (16th May 2018)

• Record Type: Journal Article
• Authors: Karar, Monaj; Shit, Pradip; Halder, Basudeb; Mallick, Arabinda; Majumdar, Tapas
• Is Part Of: ChemistrySelect. Volume 3:Issue 19(2018)
• Page Start: 5277
• Page End: 5282
• Publication Date: 2018-05-16
• Subjects: Carbazole -- Logic Gate -- Memory Element -- Molecular keypad lock; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201702858
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Carbazole (CZ) can act as a photo‐switch leading to a multifunctional logic system when triggered by fluoride (F – ) ions, H2 O and light, through efficient interaction of the pyrrole unit with the anions. Here we are reporting a unimolecular platform of CZ (and case specific CZ‐F – ) that can be configured as NOT, YES, complimentary IMPLICATION and INHIBIT, a new complex logic gate performing IF‐THEN and NOT operations and a memory element with cyclic "Erase‐Read‐Write‐Read" ability with feedback loop mechanism. The fluorescence responses of the CZ system also have been exploited to design a potential highly secured molecular keypad lock operating with a purely opto‐chemical password composed with optical and chemical input keys. The system displays the applications of light responsive molecules as multifunctional, reconfigurable molecular logic devices that may lead towards true molecular information processing units. Abstract : Emission responses of Carbazole with F – ion and H2 O were utilized to design different types of logic gates such as NOT, YES, IMPLICATION and INHIBIT and complex logic gate mimicking IF‐THEN and NOT operations. Moreover, a memory element with cyclic "Erase‐Read‐Write‐Read" ability and a highly secured molecular keypad lock operating with a purely opto‐chemical password composed with optical and chemical input keys were also constructed.