A simple Schiff base molecular logic gate for detection of Zn2+ in water and its bio-imaging application in plant system

Naskar, Barnali; Modak, Ritwik; Sikdar, Yeasin; Maiti, Dilip K.; Banik, Avishek; Dangar, Tushar Kanti; Mukhopadhyay, Subhrakanti; Mandal, Debasish; Goswami, Sanchita

doi:10.1016/j.jphotochem.2016.01.022

Cited by 46 publications

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“…We next screened the library in search of potential chemosensors. H 2 SalEt is already reported by us as a selective sensor for Zn 2+ . As shown in Scheme , H 2 SalPr and H 3 SalPd are unable to differentiate Zn 2+ and Al 3+ (Figure S9−S10, SI).…”

Section: Resultsmentioning

confidence: 59%

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Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn²⁺to Al³⁺

et al. 2017

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The paper describes how synthetic modulation of a chemosensor can be utilized to obtain altered selectivity of analytes. A series of chemosensors were designed by changing the alcohol arm length, from ethanol amine (H2SalEt) to propanol amine (H2SalPr) to a combined one i. e. 3‐amino 1, 2 propanediol (H3SalPd) / ring system, benzene to napthyl ring analogues (H2NapEt, H2NapPr and H3NapPd) and screened for selectivity towards specific analytes. H2SalEt was already reported to sense Zn2+ selectively. The generated H2SalPr and H3SalPd were unable to differentiate Zn2+ and Al3+. However H2NapEt, H2NapPr and H3NapPd are excellent chemosensors for selective detection of Al3+ alone. The feasibility and practicability of H3NapPd to sense Al3+ was further explored on HepG2 cells.

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Section: Resultsmentioning

confidence: 59%

“…However, only a few examples highlight their utility as chemosensors for biologically important metal ions . Previously, we have demonstrated that a probe H 2 SalEt (Scheme ) can selectively sense Zn 2+ with negligible interference from Al 3+ .…”

Section: Introductionmentioning

confidence: 99%

Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn²⁺to Al³⁺

et al. 2017

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“…Various analyte‐specific probes for detection of Zn 2+ , Cu 2+ , Hg 2+ and Al 3+ based on such systems have been reported by us . In Table S1, selected aspects of recently published α‐hydroxy aromatic Schiff base Zn 2+ sensors are compiled, clearly showing that even a slight modification in the chemical structure of a probe may lead to its different photophysical and chemical properties affecting its functionality and applications, such as the limit of detection, selectivity, and also AIEE features. Moreover, depending on molecular structure, a different signaling mechanism may take place .…”

Section: Introductionmentioning

confidence: 99%

Aggregation‐Induced Emission‐Based Sensing Platform for Selective Detection of Zn²⁺: Experimental and Theoretical Investigations

et al. 2019

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Fluorescent chemosensors with aggregation induced emission enhancement (AIEE) emerge as promising tools in the field of sensing materials. Herein, we report the design, synthesis and applicability of a Schiff base chemosensor 1‐(benzo[1,3]dioxol‐4‐ylmethylene‐hydrazonomethyl)‐naphthalen‐2‐ol (Hbdhn) of AIE characteristics that exhibits highly effective and selective response towards Zn2+. The sensing effect of Hbdhn was evaluated by means of absorption/emission spectra and corresponding underlying photophysical mechanisms were proposed based on extensive quantum‐chemical (TD)DFT calculations. The aggregated states in different DMSO/H2O ratios and in a presence of Zn2+ were examined by fluorescence lifetime measurements, dynamic light scattering and scanning electron microscopy studies. The bioimaging abilities of Hbdhn were evaluated for Zn2+ in HepG2 cancer cells. The results demonstrate instant, stable in time and reproducible, colorimetric turn‐on response with superb selectivity and sensitivity of Hbdhn towards Zn2+, based on chelation enhanced fluorescence mechanism. AIEE improves further Hbdhn properties, leading to strong, long‐lived fluorescence, with appearance of rod‐like particles, in 90 % of water in DMSO and only 10 % of water in DMSO in the presence of Zn2+. All these features combined with successful biomaging studies make Hbdhn one of the most promising candidate for practical applications among recently proposed related systems.

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“…Since the emergence of the first molecular keypad lock (Figure ), various types of molecular security systems that can recognize passwords via distinct mechanisms have been developed, demonstrating the generality of this approach …”

Section: Molecular Logic Gate‐based User Authorization Systemsmentioning

confidence: 99%

“…The latter are macroscopic analytical devices that, similar to the way the olfactory system operates, can interact non‐specifically with a wide range of analytes and discriminate among them by creating a wide range of unique identification patterns . Hence, the main difference between 8 and the molecular keypad locks discussed before is that instead of generating a single digital output (0 or 1) for each code entry, it associates each password with a unique emission “signature” that enables it to authorize multiple users.…”

Section: User Authorization By Pattern‐generating Fluorescent Molecumentioning

confidence: 99%

User Authorization at the Molecular Scale

2017

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Electronic user authorization systems help us maintain our privacy in many aspects of everyday life. However, the increasing difficulty to secure access and/or information digitally has inspired chemists to devise alternative, molecular approaches, in which users are identified by chemical means. The potential advantages of using molecular user authentication systems over conventional electronic devices are their versatility and unusual operating principles, which complicate replicating and, consequently, breaking into molecular security devices. Their molecular scale is another unique property that enables hiding such systems and, consequently, applying steganography as an additional layer of protection. Although the area of molecular‐based user authorization is still in its infancy, the development of various molecular keypad locks and, more recently, a password‐protected molecular cryptographic machine, indicate the possibility of protecting information at the molecular scale.

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A simple Schiff base molecular logic gate for detection of Zn2+ in water and its bio-imaging application in plant system

Cited by 46 publications

References 44 publications

Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn²⁺to Al³⁺

Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn²⁺to Al³⁺

Aggregation‐Induced Emission‐Based Sensing Platform for Selective Detection of Zn²⁺: Experimental and Theoretical Investigations

User Authorization at the Molecular Scale

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A simple Schiff base molecular logic gate for detection of Zn2+ in water and its bio-imaging application in plant system

Cited by 46 publications

References 44 publications

Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn2+to Al3+

Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn2+to Al3+

Aggregation‐Induced Emission‐Based Sensing Platform for Selective Detection of Zn2+: Experimental and Theoretical Investigations

User Authorization at the Molecular Scale

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Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn²⁺to Al³⁺

Synthetic Modulation of a Chemosensor Affords Target Metal Ion Switch from Zn²⁺to Al³⁺

Aggregation‐Induced Emission‐Based Sensing Platform for Selective Detection of Zn²⁺: Experimental and Theoretical Investigations