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  1. Article ; Online: Acid-base equilibrium in non-aqueous medium: colorimetric visualization, estimation of acidity constants and construction of molecular logic gates.

    Mahato, Manas / Maiti, Arpita / Ahamed, Sabbir / Rajbanshi, Madan / Lama, Shubham / Das, Sudhir Kumar

    RSC advances

    2024  Volume 14, Issue 5, Page(s) 3480–3488

    Abstract: A reversible acid-base probe, ( ... ...

    Abstract A reversible acid-base probe, (N
    Language English
    Publishing date 2024-01-22
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra04696f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A Phenanthroimidazole-Based Luminophore for Selective and Specific Identification of Sarin Simulant, Diethylchlorophosphate.

    Sultana, Tuhina / Mahato, Manas / Tohora, Najmin / Ahamed, Sabbir / Maiti, Arpita / Das, Sudhir Kumar

    Journal of fluorescence

    2024  

    Abstract: The simplicity of synthesis, significant toxicity of organophosphorus-containing nerve agents, and ease of use of their in-terrorism attacks highlight the necessity to create efficient probes and precise methods for detecting these chemicals. This study ... ...

    Abstract The simplicity of synthesis, significant toxicity of organophosphorus-containing nerve agents, and ease of use of their in-terrorism attacks highlight the necessity to create efficient probes and precise methods for detecting these chemicals. This study developed luminogenic probe 4-(1 H-phenanthrene imidazole-2-yl) benzaldehyde, PB for selectively recognizing lethal chemical sarin mimicking diethylchlorophosphate (DCP) with µM detection limit. Following the addition of DCP to the PB solution, the fluorescence changed from bluish-cyan to green simultaneously; after the insertion of triethylamine (TEA) into the PB-DCP phosphorylated solution, the fluorescence of the original one came back, and it occurred five times. A paper strip-based test kit and dip-stick experiments have been executed to demonstrate the practical applicability of our sensor PB and instant, on-site recognition of the target analyte DCP. An experiment has been investigated using a smartphone and red-green-blue (RGB) color analysis, which offers a novel way for the fast, on-site visual detection and quantification of DCP in actual samples. It also reduces equipment costs, speeds up detection times, and substantially simplifies the operation procedure.
    Language English
    Publishing date 2024-02-29
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2016892-5
    ISSN 1573-4994 ; 1053-0509
    ISSN (online) 1573-4994
    ISSN 1053-0509
    DOI 10.1007/s10895-024-03631-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A Chromogenic Probe for Detection of Biologically Important Anions and its Implications for Designing Molecular Logic Gates.

    Rajbanshi, Madan / Mahato, Manas / Maiti, Arpita / Ahamed, Sabbir / Sarkar, Pallobi / Das, Sudhir Kumar

    Journal of fluorescence

    2024  

    Abstract: Detection of fluoride ( ... ...

    Abstract Detection of fluoride (F
    Language English
    Publishing date 2024-03-06
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2016892-5
    ISSN 1573-4994 ; 1053-0509
    ISSN (online) 1573-4994
    ISSN 1053-0509
    DOI 10.1007/s10895-024-03629-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A Chromo-fluorogenic Probe for Selective Detection of Picric Acid Alongside Its Recovery by Aliphatic Amines and Construction of Molecular Logic Gates.

    Sarkar, Pallobi / Tohora, Najmin / Mahato, Manas / Ahamed, Sabbir / Sultana, Tuhina / Das, Sudhir Kumar

    Journal of fluorescence

    2023  

    Abstract: Nitroaromatic compounds are illicit explosive chemicals. For environmental security and homeland safety, selective and sensitive identification of these secondary-class explosives has been a reason for the exhaustive research arena of chemists for about ... ...

    Abstract Nitroaromatic compounds are illicit explosive chemicals. For environmental security and homeland safety, selective and sensitive identification of these secondary-class explosives has been a reason for the exhaustive research arena of chemists for about a decade. We introduced a sensitive optical sensor with desalted neutral red (NR) dye. After ingressing picric acid (PA) in acetonitrile, the probe becomes non-fluorescent, displaying a colorimetric change from yellow to pink. The quenched phenomena and the changed color were re-established with aliphatic amine, trimethylamine (TEA). The reversibility is produced cyclically, both in fluorimetrically and spectrophotometrically. The detection limit for PA with our probe comes out as 0.639 µM; this value is significantly lower than many chemosensors available in the literature. Also, NR-stained filter paper strips-based test kit analysis has been deployed as a displayable photonic device for in-situ detection of PA. Furthermore, the whole system was conceptualized to produce single input, single output, and double input single output logic gates, which can be applied to digital devices. The chronological input manner as NTP (NR- TEA-PA) pushed us to configure a molecular keypad lock system, the basis of digital locking devices. The repeatable & reversible detection system exhibits "Write read- Erase-read Write-read' type memory devices.
    Language English
    Publishing date 2023-12-30
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2016892-5
    ISSN 1573-4994 ; 1053-0509
    ISSN (online) 1573-4994
    ISSN 1053-0509
    DOI 10.1007/s10895-023-03555-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Fabrication of a re-useable ionic liquid-based colorimetric organo nanosensor for detection of nerve agents' stimulants.

    Tohora, Najmin / Ahamed, Sabbir / Sultana, Tuhina / Mahato, Manas / Das, Sudhir Kumar

    Talanta

    2023  Volume 266, Issue Pt 1, Page(s) 124968

    Abstract: Nerve agents are highly poisonous organophosphorus chemicals, and the possibility of being used in terrorist attacks seriously threatens public safety. Thus, developing quick and straightforward detection techniques for these dangerous substances is ... ...

    Abstract Nerve agents are highly poisonous organophosphorus chemicals, and the possibility of being used in terrorist attacks seriously threatens public safety. Thus, developing quick and straightforward detection techniques for these dangerous substances is paramount for the scientific communities. In this contribution, we have fabricated a sensitive and easily applicable ionic liquids (ILs) based colorimetric sensor for detecting various nerve agents' stimulants in solution and gas phases, respectively, based on methyl orange (MO)-based IL ([P
    Language English
    Publishing date 2023-07-25
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500969-5
    ISSN 1873-3573 ; 0039-9140
    ISSN (online) 1873-3573
    ISSN 0039-9140
    DOI 10.1016/j.talanta.2023.124968
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: A benzoxazole-based turn-on fluorosensor for rapid and sensitive detection of sarin surrogate, diethylchlorophosphate.

    Tohora, Najmin / Mahato, Manas / Sultana, Tuhina / Ahamed, Sabbir / Das, Sudhir Kumar

    Analytica chimica acta

    2023  Volume 1255, Page(s) 341111

    Abstract: A benzoxazole-based fluorosensor (IMP) has been synthesized and employed for the selective and sensitive detection of sarin surrogate, diethylchlorophosphate (DCP) in solution, and gas phase, respectively. Remarkable turn-on fluorescence is observed due ... ...

    Abstract A benzoxazole-based fluorosensor (IMP) has been synthesized and employed for the selective and sensitive detection of sarin surrogate, diethylchlorophosphate (DCP) in solution, and gas phase, respectively. Remarkable turn-on fluorescence is observed due to the introduction of DCP in the solution of IMP because of inhibition of the intramolecular charge transfer process and disruption of the excited state intramolecular proton transfer (ESIPT) mechanism. The synthesized IMP-based fluorescence sensor exhibits excellent selectivity, high sensitivity, and a wide linear range of 15-60 μM with a detection limit of 44 nM. Low-intense to highly intensified visible violet color could be seen by the naked eye under a portable 365 nm UV lamp due to the addition of DCP in the solution of IMP. IMP-stained paper strips-based test kit experiment has been demonstrated to detect traces of DCP in stockpiles of related analytes. A dip-stick experiment for the detection of DCP vapor has also been demonstrated. The effectiveness of IMP in detecting DCP established that it might be used as a signal tool for real sample analysis.
    Language English
    Publishing date 2023-03-21
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1483436-4
    ISSN 1873-4324 ; 0003-2670
    ISSN (online) 1873-4324
    ISSN 0003-2670
    DOI 10.1016/j.aca.2023.341111
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: A benzoxazole-triphenylamine conjugated fluorogenic probe for specific detection of sarin gas mimic diethylchlorophosphate.

    Sultana, Tuhina / Mahato, Manas / Tohora, Najmin / Ahamed, Sabbir / Maiti, Arpita / Ghanta, Susanta / Das, Sudhir Kumar

    Analytical methods : advancing methods and applications

    2024  Volume 16, Issue 5, Page(s) 759–771

    Abstract: In this study, an excellent chromo-fluorogenic PMPA probe, ( ...

    Abstract In this study, an excellent chromo-fluorogenic PMPA probe, (
    Language English
    Publishing date 2024-02-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515210-5
    ISSN 1759-9679 ; 1759-9660
    ISSN (online) 1759-9679
    ISSN 1759-9660
    DOI 10.1039/d3ay01819a
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  8. Article ; Online: Highly selective and sensitive chromogenic recognition of sarin gas mimicking diethylchlorophosphate.

    Mahato, Manas / Sultana, Tuhina / Maiti, Arpita / Ahamed, Sabbir / Tohora, Najmin / Ghanta, Susanta / Das, Sudhir Kumar

    Analytical methods : advancing methods and applications

    2024  Volume 16, Issue 9, Page(s) 1371–1382

    Abstract: The high-level toxic effects of organophosphate (OP) nerve agents severely threaten national security and public health. Generating trustworthy, accurate methods for quickly identifying these poisonous chemicals is urgently necessary. In this study, we ... ...

    Abstract The high-level toxic effects of organophosphate (OP) nerve agents severely threaten national security and public health. Generating trustworthy, accurate methods for quickly identifying these poisonous chemicals is urgently necessary. In this study, we have presented an azine-based colorimetric sensor (HBD) for the highly sensitive and selective identification of poisonous sarin gas surrogate diethylchlorophosphate (DCP). Our introduced sensor shows a purple color in contact with DCP, which is fully reversible upon the addition of triethylamine (TEA). The detection limit of our sensor for the toxic nerve agent mimic DCP is in the μM range. We have fabricated a test kit to verify the capability of HBD for on-the-spot identification of DCP to execute its practical use. To prove that HBD is an effective chemosensor, dip-stick investigation was conducted to detect DCP in the vaporous stage in the presence of different OPs, inorganic phosphates (IPs), and many other deadly analytes. A cellphone-based display method was also undertaken for on-the-spot recognition and measurement of DCP in isolated regions.
    MeSH term(s) Sarin ; Fluorescent Dyes ; Organophosphorus Compounds ; Nerve Agents
    Chemical Substances diethylchlorophosphate ; Sarin (B4XG72QGFM) ; Fluorescent Dyes ; Organophosphorus Compounds ; Nerve Agents
    Language English
    Publishing date 2024-02-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515210-5
    ISSN 1759-9679 ; 1759-9660
    ISSN (online) 1759-9679
    ISSN 1759-9660
    DOI 10.1039/d3ay02306k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: A pyrene-based chromo-fluorogenic probe for specific detection of sarin gas mimic, diethylchlorophosphate.

    Chourasia, Jyoti / Tohora, Najmin / Sultana, Tuhina / Mahato, Manas / Maiti, Arpita / Ahamed, Sabbir / Das, Sudhir Kumar

    Luminescence : the journal of biological and chemical luminescence

    2024  Volume 39, Issue 4, Page(s) e4731

    Abstract: Nerve agents are becoming serious issues for the healthy and sustainable environment of modern civilization. Therefore, its detection and degradation are of paramount importance to the scientific community. In the present contribution, we have introduced ...

    Abstract Nerve agents are becoming serious issues for the healthy and sustainable environment of modern civilization. Therefore, its detection and degradation are of paramount importance to the scientific community. In the present contribution, we have introduced a chromo-fluorogenic pyrene-based  probe, (E)-2-methoxy-3-(pyren-1-ylimino)-3,8a-dihydro-2H-chromen-4-ol (PMCO) to detect sarin stimulant diethylchlorophosphate (DCP) in solution and gaseous phases. On inserting DCP in PMCO solution, a visual colorimetric change from yellow to clear colourless in daylight and highly intensified blue fluorescence was observed instantly under a 365 nm portable UV lamp light. PMCO has outstanding selectivity and high sensitivity with a limit of detection of 1.32 μM in dimethyl sulfoxide (DMSO) medium and 77.5 nM in 20% H
    MeSH term(s) Sarin/analysis ; Nerve Agents/analysis ; Fluorescent Dyes ; Dimethyl Sulfoxide ; Gases ; Organophosphorus Compounds
    Chemical Substances Sarin (B4XG72QGFM) ; diethylchlorophosphate ; Nerve Agents ; Fluorescent Dyes ; Dimethyl Sulfoxide (YOW8V9698H) ; Gases ; Organophosphorus Compounds
    Language English
    Publishing date 2024-04-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1470995-8
    ISSN 1522-7243 ; 1522-7235 ; 1099-1271
    ISSN (online) 1522-7243
    ISSN 1522-7235 ; 1099-1271
    DOI 10.1002/bio.4731
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: A Julolidine Coupled Azine-based Reversible Chromo-fluorogenic Probe for Specific Detection of Cu

    Maiti, Arpita / Ahamed, Sabbir / Mahato, Manas / Ray, Tanusree / Dakua, Vikas Kumar / Roy, Kanak / Roy, Mahendra Nath

    Journal of fluorescence

    2024  

    Abstract: Among the various essential trace elements for living organisms, the copper ( ... ...

    Abstract Among the various essential trace elements for living organisms, the copper (Cu
    Language English
    Publishing date 2024-01-19
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2016892-5
    ISSN 1573-4994 ; 1053-0509
    ISSN (online) 1573-4994
    ISSN 1053-0509
    DOI 10.1007/s10895-023-03577-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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