A novel coumarin based molecular switch for dual sensing of Zn(ii) and Cu(ii)

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7647-7653 ◽  
Author(s):  
Deblina Sarkar ◽  
Ajoy Kumar Pramanik ◽  
Tapan Kumar Mondal
Keyword(s):  
Logic Gate ◽  
Logic Gates ◽  
Molecular Switch ◽  
Tunable System ◽  
Chemical Inputs ◽  
Dual Sensing

New coumarin based molecular switch for Zn2+ and Cu2+ presents a tunable system comprising of two INHIBIT logic gates with Zn2+ and Cu2+ or Zn2+ and EDTA as chemical inputs. IMPLICATION logic gate is obtained with Cu2+ and EDTA as chemical inputs.

Rational Design of Azo-Azomethine Receptors for Sensing of Inorganic Fluoride: Construction of Molecular Logic Gates and DFT Study

2017 ◽  
Vol 70 (12) ◽  
pp. 1254
Author(s):  
Hamid Khanmohammadi ◽  
Khatereh Rezaeian ◽  
Nafiseh Shabani
Keyword(s):  
Density Functional ◽  
Rational Design ◽  
Condensation Reaction ◽  
Logic Gate ◽  
Logic Gates ◽  
Inorganic Fluoride ◽  
Fluoride Ions ◽  
Molecular Logic Gates ◽  
Sensitivity And Selectivity ◽  
Chemical Inputs

New azo-azomethine receptors, HLn (n = 1–3), have been synthesised via condensation reaction of 5-(4-X-phenyl)-azo-salicylaldehyde (X = NO2, Cl and CH3) with (4-nitrobenzylidene)hydrazine. The receptor with a p-NO2 substituent on the aromatic ring of the azo moiety (HL1) has excellent sensitivity and selectivity towards basic anions with proper discrimination between F− and AcO− or H2PO4− in DMSO–water (4 : 1). A Job’s plot displays a 1 : 1 stoichiometry between HL1 and F− alone with a detection limit of 0.737 μM for fluoride ions. The solvatochromic behaviour of HL1 was probed by studying its UV-vis spectra in four pure organic solvents of different polarities and a meaningful correlation was observed. Furthermore, HL1 was used for detection of inorganic fluoride in toothpaste. The systematic density functional theory (DFT) and time dependent-DFT calculations have been carried out to investigate the mechanism of colourimetric sensing of fluoride ion by HL1 in the gas phase and in solution. Moreover, by using F− and H+ as chemical inputs, and the absorbance as output, a INHIBIT logic gate was constructed, which exhibits ‘Write–Read–Erase–Read’ ability without obvious degradation in its optical output.

Recent advances in molecular logic gate chemosensors based on luminescent metal organic frameworks

2021 ◽  
Author(s):  
Bei Li ◽  
Dongsheng Zhao ◽  
Feng Wang ◽  
Xiaoxian Zhang ◽  
Wenqian Li ◽  
...  
Keyword(s):  
Logic Gate ◽  
Metal Organic Frameworks ◽  
Logic Gates ◽  
Design Strategies ◽  
Molecular Logic Gate ◽  
Future Developments ◽  
Molecular Logic ◽  
Molecular Logic Gates ◽  
Recent Advances ◽  
Metal Organic

This review covers the latest advancements of molecular logic gates based on LMOF. The classification, design strategies, related sensing mechanisms, future developments, and challenges of LMOFs-based logic gates are discussed.

Communicating Chemical Congregation:  A Molecular AND Logic Gate with Three Chemical Inputs as a “Lab-on-a-Molecule” Prototype

2006 ◽  
Vol 128 (15) ◽  
pp. 4950-4951 ◽  
Author(s):  
David C. Magri ◽  
Gareth J. Brown ◽  
Gareth D. McClean ◽  
A. Prasanna de Silva
Keyword(s):  
Logic Gate ◽  
Chemical Inputs

Power–Delay-Error-Efficient Approximate Adder for Error-Resilient Applications

2019 ◽  
Vol 28 (10) ◽  
pp. 1950171 ◽  
Author(s):  
Vinay Kumar ◽  
Ankit Singh ◽  
Shubham Upadhyay ◽  
Binod Kumar
Keyword(s):  
Image Processing ◽  
Power Consumption ◽  
Logic Gate ◽  
Logic Gates ◽  
Error Tolerance ◽  
Approximate Computing ◽  
Processing Application ◽  
Error Resilient ◽  
Delay Performance ◽  
Prime Concern

Power dissipation has been the prime concern for CMOS circuits. Approximate computing is a potential solution for addressing this concern as it reduces power consumption resulting in improved performance in terms of power–delay product (PDP). Decrease of power consumption in approximate computing is achieved by approximating the demand of accuracy as per the error tolerance of the system. This paper presents a new approach for designing approximate adder by introducing inexactness in the existing logic gate(s). Approximated logic gates provide flexibility in designing low power error-resilient systems depending on the error tolerance of the applications such as image processing and data mining. The proposed approximate adder (PAA) has higher accuracy than existing approximate adders with normalized mean error distance of 0.123 and 0.1256 for 16-bit and 32-bit adder, respectively, and lower PDP of 1.924E[Formula: see text]18[Formula: see text]J for 16-bit adder and 5.808E[Formula: see text]18[Formula: see text]J for 32-bit adder. The PAA also performs better than some of the recent approximate adders reported in literature in terms of layout area and delay. Performance of PAA has also been evaluated with an image processing application.

Realizing an N-two-qubit quantum logic gate in a cavity QED with nearest qubit--qubit interaction

2016 ◽  
Vol 16 (5&6) ◽  
pp. 465-482
Author(s):  
Taoufik Said ◽  
Abdelhaq Chouikh ◽  
Karima Essammouni ◽  
Mohamed Bennai
Keyword(s):  
Quantum Logic ◽  
Cavity Qed ◽  
Logic Gate ◽  
Operation Time ◽  
Logic Gates ◽  
Initial State ◽  
Gate Operation ◽  
Quantum Logic Gates ◽  
Current State ◽  
Phase Gate

We propose an effective way for realizing a three quantum logic gates (NTCP gate, NTCP-NOT gate and NTQ-NOT gate) of one qubit simultaneously controlling N target qubits based on the qubit-qubit interaction. We use the superconducting qubits in a cavity QED driven by a strong microwave field. In our scheme, the operation time of these gates is independent of the number N of qubits involved in the gate operation. These gates are insensitive to the initial state of the cavity QED and can be used to produce an analogous CNOT gate simultaneously acting on N qubits. The quantum phase gate can be realized in a time (nanosecond-scale) much smaller than decoherence time and dephasing time (microsecond-scale) in cavity QED. Numerical simulation under the influence of the gate operations shows that the scheme could be achieved efficiently within current state-of-the-art technology.

A reversible fluoride chemosensor for the development of multi-input molecular logic gates

2019 ◽  
Vol 43 (32) ◽  
pp. 12734-12743 ◽  
Author(s):  
Mahesh P. Bhat ◽  
Madhuprasad Kigga ◽  
Harshith Govindappa ◽  
Pravin Patil ◽  
Ho-Young Jung ◽  
...  
Keyword(s):  
Logic Gate ◽  
Logic Gates ◽  
Molecular Logic Gate ◽  
Molecular Logic ◽  
Molecular Logic Gates

A reversible chemosensor for the development of a multi-input molecular logic gate was shown.

scholarly journals From chemical soup to computing circuit: transforming a contiguous chemical medium into a logic gate network by modulating its external conditions

2019 ◽  
Vol 16 (158) ◽  
pp. 20190190
Author(s):  
Matthew Egbert ◽  
Jean-Sébastien Gagnon ◽  
Juan Pérez-Mercader
Keyword(s):  
Logic Gate ◽  
Reaction Diffusion ◽  
Logic Gates ◽  
Full Adder ◽  
Integrated Network ◽  
Lighting Conditions ◽  
Reaction Diffusion Model ◽  
Spatially Extended ◽  
External Conditions ◽  
Spatially Extended Systems

It has been shown that it is possible to transform a well-stirred chemical medium into a logic gate simply by varying the chemistry’s external conditions (feed rates, lighting conditions, etc.). We extend this work, showing that the same method can be generalized to spatially extended systems. We vary the external conditions of a well-known chemical medium (a cubic autocatalytic reaction–diffusion model), so that different regions of the simulated chemistry are operating under particular conditions at particular times. In so doing, we are able to transform the initially uniform chemistry, not just into a single logic gate, but into a functionally integrated network of diverse logic gates that operate as a basic computational circuit known as a full-adder.

Structural characterization of a fluorescein hydrazone molecular switch with application towards logic gates

2018 ◽  
Vol 42 (22) ◽  
pp. 18050-18058 ◽  
Author(s):  
Juan D. Villada ◽  
Richard F. D’Vries ◽  
Mario Macías ◽  
Fabio Zuluaga ◽  
Manuel N. Chaur
Keyword(s):  
Structural Characterization ◽  
Metal Cations ◽  
Logic Gates ◽  
Molecular Switch ◽  
Logic Circuits ◽  
X Ray ◽  
Ph Changes ◽  
X Ray Crystallography ◽  
Half Adder

A new polymorph of fluorescein hydrazone was fully characterized via single X-ray crystallography. In addition, multiple logic circuits and a Half-Adder operator were designed using the fluorescence and UV-Vis switching responses of the fluorescein compound to different metal cations and pH changes.

Sign in / Sign up

Export Citation Format

Share Document