Polymer based ON-OFF-ON fluorescent logic gate: Synthesis, characterization and understanding

Biswas, Debrupa; Bar, Nandagopal; Pal, Sarmistha; Mazumder, Swapan Kumar; Ray, Arindam; Chowdhury, Shreyashi; Das, Gourab Kanti; Chowdhury, Pranesh

doi:10.1016/j.molstruc.2021.132166

Cited by 10 publications

(3 citation statements)

References 73 publications

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“…Now, we have constructed binary logic functions with Zn 2+ and Cu 2+ as dual stimulating inputs and absorbance and fluorescence as outputs (Figure 6). 75,76 Upon the addition of Zn 2+ ions (Input-1), a new fluorescence band appeared at 527 nm, attributed to a typical exciplex formation as described above. On the contrary, in the presence of Cu 2+ ions (Input-2), the emission band at 565 nm was quenched, probably due to the combined effect of PET and intramolecular charge transfer.…”

Section: Spectroscopic Studies 311 Uv−visible Studiesmentioning

confidence: 64%

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Dual-Mode Multiple Ion Sensing via Analyte-Specific Modulation of Keto–Enol Tautomerization of an ESIPT Active Pyrene Derivative: Experimental Findings and Computational Rationalization

2023

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A pyrene-based e xcited - state intramolecular proton transfer (ESIPT) active probe PMHMP was synthesized, characterized, and employed for the ppb-level, dual-mode, and high-fidelity detection of Cu2+ (LOD: 7.8 ppb) and Zn2+ ions (LOD: 4.2 ppb) in acetonitrile medium. The colorless solution of PMHMP turned yellow upon the addition of Cu2+, suggesting its ratiometric, naked-eye sensing. On the contrary, Zn2+ ions displayed concentration-dependent fluorescence rise till a 0.5 mole fraction and subsequent quenching. Mechanistic investigations indicated the formation of a 1:2 exciplex (Zn2+:PMHMP) at a lower concentration of Zn2+, which eventually turned into a more stable 1:1 (Zn2+:PMHMP) complex with an additional amount of Zn2+ ions. However, in both cases, it was observed that the hydroxyl group and the nitrogen atom of the azomethine unit were involved in the metal ion coordination, which eventually altered the ESIPT emission. Furthermore, a green-fluorescent 2:1 PMHMP–Zn2+ complex was developed and additionally employed for the fluorimetric analysis of both Cu2+ and H2PO4 – ions. The Cu2+ ion, owing to its higher binding affinity for PMHMP, could replace the Zn2+ ion from the preformed complex. On the other hand, H2PO4 – formed a tertiary adduct with the Zn2+–complex, leading to a distinguishable optical signal. Furthermore, extensive and organized density functional theory calculations were performed to explore the ESIPT behavior of PMHMP and the geometrical and electronic properties of the metal complexes.

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Section: Spectroscopic Studies 311 Uv−visible Studiesmentioning

confidence: 64%

“…Now, we have constructed binary logic functions with Zn 2+ and Cu 2+ as dual stimulating inputs and absorbance and fluorescence as outputs (Figure ). , …”

Section: Resultsmentioning

confidence: 99%

Dual-Mode Multiple Ion Sensing via Analyte-Specific Modulation of Keto–Enol Tautomerization of an ESIPT Active Pyrene Derivative: Experimental Findings and Computational Rationalization

2023

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“…The L 24 showed strong fluorescence at ∼469 nm, but upon increasing addition of F – , quenching was observed in the fluorescence intensity due to complexation (Figure ). The selective detection of Fe 3+ and the interaction of the complex { L 24 + Fe 3+ } toward F – resulted in constructing an INHIBIT molecular logic gate. In this study, F – and Fe 2+ act as inputs, while the emission intensity at 469 nm acts as output.…”

Section: Results and Discussionmentioning

confidence: 99%

Supramolecular Logic Gates Based on the Conjugates of Calixarenes and Carbohydrates

Nag,

Sivaiah,

Rao

2024

Langmuir

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In the era of application-oriented research, laboratory to real life translation is highly regarded and in great demand. This could mean that molecular science developed for sensing and detecting a variety of chemical species awaits conversion to devices. In that, the molecular logic gates are the most promising ones where the information storage and/or data processing can be easily carried out in terms of molecular inputs and electrical response outputs. This would facilitate the simultaneous execution of a diverse array of molecular sensing functions. The recent progress in molecular logic gates based on supramolecular optical receptors, in particular, fluorescent ones, such as calixarene derivatives and carbohydrate conjugates will have a transformative impact on molecular devices and will encourage this science to yield technology. Therefore, this review provides a critical evaluation of recent publications on molecular logic gates based on the derivatives of calixarenes and glyco-conjugates, including several from our own research group, with the view that the corresponding applications are a beneficiary in laboratory-to-device translation. In addition, this review is also expected to assist young researchers in planning their research focus in the broad area of supramolecular-based logic gates targeting some specific applications.

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Development of the Colorimetric and/or Fluorescent Probes for Detecting Fluoride ions in Aqueous Solution

Ding,

Meng,

Meng

et al. 2023

J Fluoresc

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Polymer based ON-OFF-ON fluorescent logic gate: Synthesis, characterization and understanding

Cited by 10 publications

References 73 publications

Dual-Mode Multiple Ion Sensing via Analyte-Specific Modulation of Keto–Enol Tautomerization of an ESIPT Active Pyrene Derivative: Experimental Findings and Computational Rationalization

Dual-Mode Multiple Ion Sensing via Analyte-Specific Modulation of Keto–Enol Tautomerization of an ESIPT Active Pyrene Derivative: Experimental Findings and Computational Rationalization

Supramolecular Logic Gates Based on the Conjugates of Calixarenes and Carbohydrates

Development of the Colorimetric and/or Fluorescent Probes for Detecting Fluoride ions in Aqueous Solution

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