An NBD-based two-in-one Cu<sup>2+</sup>/Ni<sup>2+</sup> chemosensor with differential charge transfer processes

Rani, Richa; Paul, Kamaldeep; Luxami, Vijay

doi:10.1039/c5nj02648b

Cited by 30 publications

(10 citation statements)

References 29 publications

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“…This study confirmed a predominant ligand-to-metal charge-transfer (LMCT) process for Cu 2+ -ion sensing by quenching of the excimer emission. 46 …”

Section: Resultsmentioning

confidence: 99%

Selective Sensing of Metal Ions and Nitro Explosives by Efficient Switching of Excimer-to-Monomer Emission of an Amphiphilic Pyrene Derivative

et al. 2016

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An amphiphilic pyrene derivative exhibiting unusually stable excimer emission due to strong aggregation is presented. The aggregated system served as an intelligent sensor for metal ions and nitro explosives in aqueous media. The excimer displayed excellent selectivity toward Cu2+ among the tested cations. The observation was interpreted on the basis of chelation of metal ions involving the hydroxyl and amino groups of two molecules, leading to the ligand-to-metal charge-transfer (CT) process. The excimer was further applied for the cell imaging of Cu2+ ions. Also, while treating the excimer with various nitro explosives, it displayed efficient 2,4,6-trinitrophenol sensing, corroborating mainly the CT process from pyrene to the analyte due to intercalation of the analyte within pyrene.

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“…This study confirmed a predominant ligand-to-metal charge-transfer (LMCT) process for Cu 2+ -ion sensing by quenching of the excimer emission. 46 …”

Section: Resultsmentioning

confidence: 99%

Selective Sensing of Metal Ions and Nitro Explosives by Efficient Switching of Excimer-to-Monomer Emission of an Amphiphilic Pyrene Derivative

et al. 2016

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“…50 The value is in the wide range of those (1 × 10 3~1 × 10 12 ) reported for the previous Cu 2+ chemosensors. [51][52][53][54][55][56][57] The detection limit was analyzed to be 0.87 μM according to the definition by IUPAC and the value was far lower than WHO standard (31.5 μM) (CDL = 3σ/k) ( Figure S4). 58 To examine the capability of 1 as a selective fluorescence probe for Cu 2+ , the competition tests were conducted ( Figure 4).…”

Section: Resultsmentioning

confidence: 99%

A Phenanthroimidazole‐based Fluorescent Turn‐Off Chemosensor for the Selective Detection of Cu²⁺ in Aqueous Media

Hwang

Chae

Kim

2018

Bulletin Korean Chem Soc

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A new phenanthroline-based chemosensor 3-(1H-phenanthro[9,10-d]imidazol-2-yl)benzene-1,2-diol (1) was synthesized for the recognition of Cu 2+ . Sensor 1 showed selective fluorescence quenching for Cu 2+ in aqueous media. Detection limit (0.87 μM) for Cu 2+ was much lower than WHO guideline (31.5 μM). Sensing property of 1 toward Cu 2+ was studied by fluorescence and UV-Vis titrations, and Job plot and ESI-MS analyses. Moreover, turn-off fluorescence mechanism of 1 toward Cu 2+ induced by intramolecular charge-transfer (ICT) and ligand-to-metal charge-transfer (LMCT) was well demonstrated by theoretical calculations.

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“…Moreover, NBD derivatives have a strong fluorescence character which has led to their use in metal caused disease mechanisms in living cells, sensors (ionic, radical & bio-molecule sensors), and better biological activity such as antileukemic, immunosuppressive, or monoamine oxidase inhibiting activity. [41][42][43][44][45][46][47] In the present work, synthesis of simple NBD based schiff base turn on fluorescence probe to detect Al 3 + ions is reported. In addition to this, solvent effect, the metal-binding properties and dual channel chemosensor behavior of the synthesized compound is examined.…”

Section: Introductionmentioning

confidence: 91%

Selective Turn‐On Aluminium Ions Detection of NBD⁽⁺⁾ Appended Schiff‐Base Fluorophore

et al. 2020

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The Al3+ sensor, 7‐nitrobenz‐2‐oxa‐1, 3‐diazole (NBD) derived fluorescent probe 2‐((E)‐(4‐(phenylamino)benzo[c][1,2,5]oxadiazol‐7‐ylimino)methyl) phenol (3) was synthesized and characterized by various spectral methods and crystallography. The compound (3) exhibits dual channel (fluorometric and colorimetric) sensor behaviour. It has high selectivity for Al3+ detection, produced significant fluorescence enhancement in the presence of Al3+ ion. It shows ‘‘turn off–on’’ fluorescent responses toward Al3+ in semi aqueous medium. Here, the correlative the properties of a photo sensor (NBD based schiff‘s base 3 with normal NBD derivatives 1, 2) towards Al3+ was studied. The solvent effect and cation sensing properties were investigated from ultraviolet spectroscopy and fluorescence spectroscopic methods. The facile synthetic probe 3 will alternative and open new opportunities in bio‐imaging of Al3+ in various cell lines. This will certainly be helpful in understanding the fundamental mechanism of aluminium‐induced human diseases.

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An NBD-based two-in-one Cu²⁺/Ni²⁺ chemosensor with differential charge transfer processes

Abstract: A new multifunctional NBD-based probe for differential sensing of Cu2+/Ni2+ ions through visible color changes in semi-aqueous systems.

Cited by 30 publications

References 29 publications

Selective Sensing of Metal Ions and Nitro Explosives by Efficient Switching of Excimer-to-Monomer Emission of an Amphiphilic Pyrene Derivative

Selective Sensing of Metal Ions and Nitro Explosives by Efficient Switching of Excimer-to-Monomer Emission of an Amphiphilic Pyrene Derivative

A Phenanthroimidazole‐based Fluorescent Turn‐Off Chemosensor for the Selective Detection of Cu²⁺ in Aqueous Media

Selective Turn‐On Aluminium Ions Detection of NBD⁽⁺⁾ Appended Schiff‐Base Fluorophore

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An NBD-based two-in-one Cu2+/Ni2+ chemosensor with differential charge transfer processes

Abstract: A new multifunctional NBD-based probe for differential sensing of Cu2+/Ni2+ ions through visible color changes in semi-aqueous systems.

Cited by 30 publications

References 29 publications

Selective Sensing of Metal Ions and Nitro Explosives by Efficient Switching of Excimer-to-Monomer Emission of an Amphiphilic Pyrene Derivative

Selective Sensing of Metal Ions and Nitro Explosives by Efficient Switching of Excimer-to-Monomer Emission of an Amphiphilic Pyrene Derivative

A Phenanthroimidazole‐based Fluorescent Turn‐Off Chemosensor for the Selective Detection of Cu2+ in Aqueous Media

Selective Turn‐On Aluminium Ions Detection of NBD(+) Appended Schiff‐Base Fluorophore

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An NBD-based two-in-one Cu²⁺/Ni²⁺ chemosensor with differential charge transfer processes

A Phenanthroimidazole‐based Fluorescent Turn‐Off Chemosensor for the Selective Detection of Cu²⁺ in Aqueous Media

Selective Turn‐On Aluminium Ions Detection of NBD⁽⁺⁾ Appended Schiff‐Base Fluorophore