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Multifunctional Logic Applications of a Single Molecule: A Molecular Photo‐Switch Performing as Simple and Complex Gates, Memory Element, and a Molecular Keypad Lock
Author(s) -
Karar Monaj,
Shit Pradip,
Halder Basudeb,
Mallick Arabinda,
Majumdar Tapas
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702858
Subject(s) - keypad , lock (firearm) , logic gate , computer science , simple (philosophy) , carbazole , and gate , computer hardware , materials science , nanotechnology , optoelectronics , chemistry , engineering , photochemistry , mechanical engineering , philosophy , epistemology , algorithm
Carbazole (CZ) can act as a photo‐switch leading to a multifunctional logic system when triggered by fluoride (F – ) ions, H 2 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.