Anthraquinone Derived Cholesterol Linked Imidazole Gelator in Visual Sensing of Picric Acid

Mondal, Subhendu; Ghosh, Kumaresh

doi:10.1002/slct.201700864

Cited by 22 publications

(10 citation statements)

References 64 publications

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“…Utilising their fluorescence and self-assembling properties, benzimidazole-based gels are successfully demonstrated as novel functional materials. For example, a family of alkylpyridinylium benzimidazole derivatives was synthesised in order to examine its gelation properties [48], while several fluorescent π-gelators based on benzimidazole are presented as stimuli responsive systems and sensors [49][50][51][52][53]. Ghosh et al presented sensing system for Ag + based on the cholesterol-appended benzimidazole.…”

Section: Self-assembled Sensing Materials 31 Gelsmentioning

confidence: 99%

Optical Sensing (Nano)Materials Based on Benzimidazole Derivatives

Horak¹,

Vianello²,

Steinberg³

2019

Chemistry and Applications of Benzimidazole and Its Derivatives

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Benzimidazole derivatives are well-known biologically active substances, and therefore, they are mostly synthesised for therapeutic purposes. However, such heteroaromatic molecular systems own structure-related properties that enable a variety of applications, especially in optical science. Multifunctionality of the benzimidazole unit, such as electron accepting ability, π-bridging, chromogenic pH sensitivity/switching and metal-ion chelating properties, makes it an exceptional structural candidate for the design of optical chemical sensors and functional materials. Development of smart molecular sensors and novel (nano)materials is the emerging trend observed in materials and optical sensing science in general, in which the benzimidazole molecular systems strongly contribute and participate. In this chapter, we summarised recent advances in optical sensing (nano)materials that incorporate the benzimidazole structural moiety. Solid-state optical sensing systems, including self-assembled molecular materials based on benzimidazoles, are reviewed and discussed. In addition, immobilisation of benzimidazole derivatives onto or into various substrates and matrices, such as organic and inorganic polymers, bulk membranes and nanoparticles, utilising different chemical and physical methods, is presented and analysed.

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Section: Self-assembled Sensing Materials 31 Gelsmentioning

confidence: 99%

Optical Sensing (Nano)Materials Based on Benzimidazole Derivatives

Horak¹,

Vianello²,

Steinberg³

2019

Chemistry and Applications of Benzimidazole and Its Derivatives

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“…Compounds 1 and 2 were achieved according to the Scheme . Initially, 1,2‐diamino anthraquinone was reacted with 4‐hydroxybenzaldehyde to give the intermediate phenolic compound 3 . The phenolic –OH in 3 was then protected with different silyl reagents to afford compounds 1 and 2 in appreciable yields.…”

Section: Resultsmentioning

confidence: 99%

“…Initially, 1,2-diamino anthraquinone was reacted with 4-hydroxybenzaldehyde to give the intermediate phenolic compound 3. [10] The phenolic -OH in 3 was then protected with different silyl reagents to afford compounds 1 and 2 in appreciable yields. All the compounds were characterized by usual spectroscopic methods.…”

Section: Synthesismentioning

confidence: 99%

Anthraimidazoledione Derivatives in Fluoride Sensing Ensuing Si‐O Bond Cleavage in Organic and Aqueous Medium

2020

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Anthraimidazoledione derivatives 1 and 2 containing silyl groups have been synthesized and characterized. Anion binding properties with reference to SiÀ O bond cleavage are documented in organic and aqueous medium. Both compounds 1 and 2 selectively sense F À ion over a series of other anions by exhibiting ratiometric change in UV-vis spectra in CH 3 CN. In fluorescence, significant quenching of emission of both 1 and 2 occurs in presence of F À . Other anions in this event are silent. Compounds are also found working in aqueous CH 3 CN. Both show quenching of emission while aqueous solution of KF is added to their acetonitrile solutions. Importantly, SiÀ O bond cleavage in 1 and 2 follows first order kinetics and the cleavage is more facile in 1 than 2. The detection limits for fluoride with compounds 1 and 2 were found to be 49.6 μM and 20.1 μM, respectively.[a] S. Mondal, Dr.

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“…Compared to other conventional methods such as GC‐MS, [22,23] LC‐MS, [24] electrochemical [25] or SERS [26] techniques optical methods such as absorbance or fluorescence have been very popular owing to the advantages associated with high sensitivity, selectivity, rapid response in real time and the advantage of on‐site portability. Additionally, some supramolecular gelators are also reported for naked eye PA detection [27–29] …”

Section: Introductionmentioning

confidence: 99%