scholarly journals Spectral and DFT studies of anion bound organic receptors: Time dependent studies and logic gate applications

2017 ◽  
Vol 13 ◽  
pp. 222-238 ◽  
Author(s):  
Srikala Pangannaya ◽  
Neethu Padinchare Purayil ◽  
Shweta Dabhi ◽  
Venu Mankad ◽  
Prafulla K Jha ◽  
...  
Keyword(s):  
Logic Gate ◽  
Donor Site ◽  
Aqueous Media ◽  
Visual Response ◽  
Hydrogen Bond Donor ◽  
H Nmr ◽  
Ion Sensing ◽  
Real Time Analysis ◽  
Molecular Logic ◽  
Order Rate Equation

New colorimetric receptors R1 and R2 with varied positional substitution of a cyano and nitro signaling unit having a hydroxy functionality as the hydrogen bond donor site have been designed, synthesized and characterized by FTIR, 1H NMR spectroscopy and mass spectrometry. The receptors R1 and R2 exhibit prominent visual response for F− and AcO– ions allowing the real time analysis of these ions in aqueous media. The formation of the receptor–anion complexes has been supported by UV–vis titration studies and confirmed through binding constant calculations. The anion binding process follows a first order rate equation and the calculated rate constants reveal a higher order of reactivity for AcO− ions. The 1H NMR titration and TDDFT studies provide full support of the binding mechanism. The Hg2+ and F− ion sensing property of receptor R1 has been utilized to arrive at “AND” and “INHIBIT” molecular logic gate applications.

scholarly journals Real-time analysis of multiple anion mixtures in aqueous media using a single receptor

2015 ◽  
Vol 51 (22) ◽  
pp. 4666-4669 ◽  
Author(s):  
Vaclav Havel ◽  
Mirza Arfan Yawer ◽  
Vladimir Sindelar
Keyword(s):  
Nmr Spectroscopy ◽  
Real Time ◽  
Aqueous Media ◽  
Time Analysis ◽  
Qualitative And Quantitative ◽  
H Nmr ◽  
Real Time Analysis ◽  
Single Receptor

Bambusuril macrocycles allow qualitative and quantitative sensing of anion mixtures in water using 1H NMR spectroscopy.

Evaluation of metal ion sensing behaviour of fluorescent probe along with its precursors: PET-CHEF mechanism, molecular logic gate behaviour and DFT studies

2019 ◽  
Vol 95 (1-2) ◽  
pp. 79-89 ◽  
Author(s):  
Chitra Varadaraju ◽  
Mosae Selvakumar Paulraj ◽  
G. Tamilselvan ◽  
I. V. Muthu Vijayan Enoch ◽  
V. Srinivasadesikan ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Metal Ion ◽  
Logic Gate ◽  
Dft Studies ◽  
Molecular Logic Gate ◽  
Ion Sensing ◽  
Molecular Logic ◽  
Metal Ion Sensing

scholarly journals 2,6-Bis(E)-4-Methylbenzylidine)-Cyclohexan-1-One As A Fluorescent-On Sensor For Ultra-Selective Detection Of Chromium Ion In Aqueous Media

2021 ◽  
Author(s):  
Maria Sadia ◽  
Jehangir Khan ◽  
Syed Wadood Ali Shah ◽  
Robina Naz ◽  
Faiz Ali
Keyword(s):  
Water Samples ◽  
Metal Ion ◽  
Ph Effect ◽  
Aqueous Media ◽  
Trace Level ◽  
Chromium Ion ◽  
H Nmr ◽  
Binding Stoichiometry ◽  
Ion Sensing ◽  
Spectroscopic Analyses

Abstract In current decade, curcumin and its analogues have been broadly used in biological field. However, there are relatively fewer studies regarding their fluorescence based applications for chromium ion sensing in water samples. This article, hereby, reports the synthesis, FTIR and 1H-NMR spectroscopic analyses and optical description of 2,6-bis(E)-4-methylbenzylidine)-cyclohexan-1-one (sensor C), as a fluorescence-on sensor for trace level sensing of chromium. The sensor C exhibited an ultra-selective response to chromium among the tested heavy metal ions. Different parameters were optimized like pH, effect of concentration of sensor C, metal ion and contact time. The binding stoichiometry of C :Cr3+ was calculated to be 2:1 (Job’s plot) with a significantly low detection limit of 2.3×10− 9 M. Sensor C were practically employed for detection of chromium in spiked water samples.

Selenoureas for anion binding as molecular logic gates

2017 ◽  
Vol 53 (87) ◽  
pp. 11869-11872 ◽  
Author(s):  
Arianna Casula ◽  
Paloma Begines ◽  
Alexandre Bettoschi ◽  
Josè G. Fernandez-Bolaños ◽  
Francesco Isaia ◽  
...  
Keyword(s):  
Logic Gate ◽  
Logic Gates ◽  
Anion Binding ◽  
Ternary Logic ◽  
H Nmr ◽  
Molecular Logic Gate ◽  
Logic Operation ◽  
Molecular Logic ◽  
Molecular Logic Gates ◽  
Response Output

The first example of a molecular logic gate based on selenourea/anion host–guest interaction that performs a ternary logic operation using an 1H-NMR easy to read response output is described here.

scholarly journals An efficient 2-aminothiazolesalicylaldehyde Fluorescent Chemosensor for Fe2+ ion Detection and Potential Inhibitor of NUDT5 Signaling Hormone for Breast Cancer Cell and Molecular Keypad Lock Application

2022 ◽  
Author(s):  
Summaya Banu Basha ◽  
Immanuel David Charles ◽  
Nandhakumar Raju ◽  
Sakthivel Manokaran ◽  
Hemalatha Kuzhandaivel
Keyword(s):  
Breast Cancer ◽  
Schiff Base ◽  
Condensation Reaction ◽  
Logic Gate ◽  
Single Step ◽  
H Nmr ◽  
Potential Inhibitor ◽  
Molecular Logic ◽  
Photo Induced Electron Transfer ◽  
First Time

Abstract A novel thiazole phenol conjugate 2-aminothiazolesalicylaldehyde (receptor1) was designed and synthesized for the first time through a single step process via schiff base condensation reaction. The formation of receptor1 was confirmed by FTIR, 13C NMR and 1H NMR. The receptor1 complexing with various metal ions studied through fluorescence spectroscopy showed its selectivity towards Fe2+ ion following a reverse photo induced electron transfer (PET) process compared to all other potentially competing ions. Furthermore, the receptor1 showed excellent reversibility property on adding EDTA solution. The binding affinity between receptor1-Fe2+ ion was found to be Ka = 2.22x102 M-1 and the sensing affinity of receptor1 towards Fe2+ ion at nanolevel concentration was 33.7x10-9 M which is lower than the detection limit of existing Schiff base. The receptor1 was used to detect Fe2+ ion in different water samples. Using molecular docking the chelating function of ligand (receptor1) was assessed as a potential inhibitor of NUDT5, a silence hormone signaling for breast cancer. The excellent reversibility property is used to construct INHIBIT molecular logic gate.

A Molecular Logic Gate Enables Super-Resolved Imaging of Intracellular Lipid Droplets

2019 ◽  
Author(s):  
Adam Eördögh ◽  
Carolina Paganini ◽  
Dorothea Pinotsi ◽  
Paolo Arosio ◽  
Pablo Rivera-Fuentes
Keyword(s):  
Single Molecule ◽  
Lipid Droplets ◽  
Neutral Lipids ◽  
Logic Gate ◽  
Living Cells ◽  
Three Dimensions ◽  
Single Molecule Imaging ◽  
Molecular Logic Gate ◽  
Molecular Logic ◽  
Cellular Compartments

<div>Photoactivatable dyes enable single-molecule imaging in biology. Despite progress in the development of new fluorophores and labeling strategies, many cellular compartments remain difficult to image beyond the limit of diffraction in living cells. For example, lipid droplets, which are organelles that contain mostly neutral lipids, have eluded single-molecule imaging. To visualize these challenging subcellular targets, it is necessary to develop new fluorescent molecular devices beyond simple on/off switches. Here, we report a fluorogenic molecular logic gate that can be used to image single molecules associated with lipid droplets with excellent specificity. This probe requires the subsequent action of light, a lipophilic environment and a competent nucleophile to produce a fluorescent product. The combination of these requirements results in a probe that can be used to image the boundary of lipid droplets in three dimensions with resolutions beyond the limit of diffraction. Moreover, this probe enables single-molecule tracking of lipids within and between droplets in living cells.</div>

Boolean operations mediated by an ion-pair receptor of a multi-readout molecular logic gate

2013 ◽  
Vol 49 (94) ◽  
pp. 11056 ◽  
Author(s):  
Raúl Gotor ◽  
Ana M. Costero ◽  
Salvador Gil ◽  
Margarita Parra ◽  
Pablo Gaviña ◽  
...  
Keyword(s):  
Logic Gate ◽  
Ion Pair ◽  
Boolean Operations ◽  
Molecular Logic Gate ◽  
Molecular Logic

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.

A fluorescent colorimetric azo dye based chemosensor for detection of S2− in perfect aqueous solution and its application in real sample analysis and building a molecular logic gate

2018 ◽  
Vol 10 (20) ◽  
pp. 2317-2326 ◽  
Author(s):  
Amit Kumar Manna ◽  
Jahangir Mondal ◽  
Rukmani Chandra ◽  
Kalyani Rout ◽  
Goutam Kumar Patra
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Azo Dye ◽  
Color Change ◽  
Logic Gate ◽  
Real Sample ◽  
Sample Analysis ◽  
Real Sample Analysis ◽  
Molecular Logic Gate ◽  
Molecular Logic

A fluorescent-colorimetric azo dye based bis-Schiff base chemosensor, L, has been developed. L can selectively detect S2− through a color change from yellow to orange in perfect aqueous solution by deprotonation mechanism.

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