Papers by Amrita Chatterjee
ACS Omega, 2020
In a new and environmentally sustainable approach, a series of 2-arylimidazo[1,2-a]pyridine deriv... more In a new and environmentally sustainable approach, a series of 2-arylimidazo[1,2-a]pyridine derivatives were synthesized in aqueous media in the presence of iodine as a catalyst. The reaction proceeded by condensation of various aryl methyl ketones with 2-aminopyridines to afford 2-arylimidazo[1,2-a]pyridines in good overall yields. Although several of the reactions were efficiently performed "on water", the addition of a surfactant, namely, sodium dodecyl sulphate , was found effective in terms of substrate scope and yield enhancement. Both methods were successfully used for the gram-scale synthesis of a marketed drug, zolimidine. The simple experimental setup, water as "green" media, and inexpensive catalyst are some of the merits of this protocol.
RSC Advances, 2015
An efficient, catalyst free mechanochemical route to cis-fused chromano[4,3-c]isoxazoles has been... more An efficient, catalyst free mechanochemical route to cis-fused chromano[4,3-c]isoxazoles has been developed via a simple mortar-pestle grinding method.
RSC Adv., 2014
An efficient, catalyst free mechanochemical route to 2-aryl benzothiazoles and both 2- and 1,2-di... more An efficient, catalyst free mechanochemical route to 2-aryl benzothiazoles and both 2- and 1,2-disubstituted benzimidazoles has been developed via a simple mortar–pestle grinding method.
RSC Adv., 2014
Library of 2-aryl benzimidazole core inspired from marine natural products, is identified and syn... more Library of 2-aryl benzimidazole core inspired from marine natural products, is identified and synthesized to explore antifouling/antifungal properties for the first time. Our results reveal that the 2-aryl substituent on the benzimidazole core had strong impact on their biological profile.
Talanta, 2012
A turn-on fluorescent probe for the detection of nitrite ion in water is developed based on diazo... more A turn-on fluorescent probe for the detection of nitrite ion in water is developed based on diazotization reaction of the amino group of the probe in an acidic solution (pH 1). The probe responds selectively to nitrite ion over various other anions with a turn-on type fluorogenic change from colorless to orange by the formation of rhodamine B via an analyte triggered fragmentation process. The fluorescence titration is complete within 1 h with 1 equivalent of nitrite ion. The probe is highly efficient, cost-effective and shows a detection limit of 4.6 ppb.
Organic Letters, 2010
CONTENT 1. Synthesis of probe 1 and characterization data for compounds 2b and 3. 2. Figure S1. C... more CONTENT 1. Synthesis of probe 1 and characterization data for compounds 2b and 3. 2. Figure S1. Color change (left) and fluorescence change (right, in the black box) of probe 1 (10 μM) upon addition of 3 equiv of AuCl in the 1:1 CH 3 CN/PBS buffer (pH = 7.2). 3. Figure S2. Time-dependent fluorescence change of probe 1 (10 μM) in the presence of an equimolar amount of (a) AuCl and (b) AuCl 3 , measured in 1:1 CH 3 CN/PBS buffer (pH = 7.2). λ ex = 530 nm. 4. Figure S3. (a) Time-dependent fluorescence change acquired for an equimolar mixture of probe 1 (10 μM) and AuCl 3 , measured in 1:1 CH 3 CN/PBS buffer (pH = 7.2). (b) Change in the fluorescence intensity depending on the equivalent of AuCl 3 added to probe 1, measured after 1 h for each sample. λ ex = 530 nm. 5. Figure 4. Comparison of fluorescence response of probe 1 toward Au(I) and Au(III) in the presence of all the other metal species [1.0 equiv of Mg(II), Ba(II), Cr(II), Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Pd(II), Cu(II), Ag(I), Zn(II), Cd(II), Hg(II), and Pb(II); as chloride salts except for AgNO 3 ] in the 1:1 CH 3 CN/PBS buffer (pH = 7.2), taken after 3 h of mixing. λ ex = 530 nm. 6. Figure S5. Plot of fluorescence intensity for a mixture of probe 1 (10 µM) and AuCl in 1:1 CH 3 CN/PBS buffer (pH 7.2) in the range 2-50 µM of AuCl, taken after 20 min of mixing. λ ex = 530 nm. 7. Figure S6. Fluorescence spectrum of probe 1 (10 µM) upon addition of AuCl (1.5 µM/0.4 ppm) in 1:1 CH 3 CN/PBS buffer (pH 7.2), taken after 20 min of mixing, which shows the signal-to-background ratio is more than three.
Chemistry - An Asian Journal, 2008
A colorimetric sensing system based on gold nanoparticles functionalized with a water-soluble ani... more A colorimetric sensing system based on gold nanoparticles functionalized with a water-soluble anion-recognition motif, an o-(carboxamido)trifluoroacetophenone analogue, has been developed. The nanoparticle system selectively senses specific isomers of dicarboxylates that are geometrically favorable for the binding-induced aggregation process; thus, it discriminates a trans-dicarboxylate fumarate from its cis-isomer maleate, and benzene-1,4-dicarboxylate from its isomeric benzene-1,2-and benzene-1,3-dicarboxylates in water, exhibiting a color change from red to blue.
Materials Chemistry Frontiers, 2018
Two sulfonate functionalized tetraphenylethylene (TPE) derivatives were synthesized and used as p... more Two sulfonate functionalized tetraphenylethylene (TPE) derivatives were synthesized and used as probes for the detection and imaging of Gram-positive bacteria (e.g. Staphylococcus aureus).
A simple electrical mortar-pestle was used in the development of a green and facile mechanochemic... more A simple electrical mortar-pestle was used in the development of a green and facile mechanochemical route for the catalyst-free halogenation of phenols and anilines via liquid assisted grinding using PEG-400 as the grinding auxiliary. A series of mono-, di-, tri-halogenated phenols and anilines was synthesized in good to excellent yields within 10-15 min in a chemoselective manner by controlling the stoichiometry of N-halosuccinimide (NXS, X = Br, I, Cl). It was observed that PEG-400 plays a key role in controlling the reactivity of the substrates and to afford better regioselectivity. Almost exclusive para-selectivity was observed for the aromatic substrates with free o- and p-positions for mono- and di-halogenations. As known, the decarboxylation (or desulfonation) was observed in the case of salicylic acids, anthranilic acids (or sulfanilic acids) leading to 2,4,6-trihalogenated products when 3 equiv of NXS was used. Simple instrumentation, metal-free approach, cost-effectiveness...
RSC Advances, 2021
A new AIE-based fluorimetric probe (TPE-PMI) has been successfully developed utilizing Gabriel re... more A new AIE-based fluorimetric probe (TPE-PMI) has been successfully developed utilizing Gabriel reaction for the selective detection of hydrazine in solid, liquid and vapour phases.
RSC Advances, 2015
A novel AIE-based fluorescent probe for the detection of trace amounts of nitrite and nitrate ion... more A novel AIE-based fluorescent probe for the detection of trace amounts of nitrite and nitrate ions in water has been developed, which spontaneously detects nitrites (or nitrates) by a fluorescence “turn-off” method.
Analytical chemistry, Jan 5, 2017
Methylmercury (CH3Hg+) is the common form of organic mercury and is more toxic than its inorganic... more Methylmercury (CH3Hg+) is the common form of organic mercury and is more toxic than its inorganic or elemental forms. Mercury is emanated in the course of various natural events and human activities and converts to methylmercury by anaerobic organisms. CH3Hg+ are ingested by fish and subsequently bioaccumulated in their tissue and, eventually, enter the human diet, causing serious health issues. Therefore, selective and sensitive detection of bioaccumulated CH3Hg+ in fish samples is essential. Herein, the development of a simple, highly sensitive and selective aggregation-induced emission (AIE)-based turn-on probe for both inorganic mercury ions and organicmercury species is reported. The probe's function is based on mercury ion-promoted transmetalation reaction of aryl boronic acid. The probe, a tetraphenylethylene (TPE)-monoboronic acid (1), was successfully utilized for AIE-based fluorescence imaging study on methylmercury-contaminated live cells and zebrafish for the first t...
ACS Applied Nano Materials
Graphene oxide (GO) and its reduced form reduced GO (rGO) have received huge research attention b... more Graphene oxide (GO) and its reduced form reduced GO (rGO) have received huge research attention because of their unique surface properties and diverse application potential. Here, a rGO-based turn-...
RSC Advances, 2013
Please note that technical editing may introduce minor changes to the text and/or graphics contai... more Please note that technical editing may introduce minor changes to the text and/or graphics contained in the manuscript submitted by the author(s) which may alter content, and that the standard Terms & Conditions and the ethical guidelines that apply to the journal are still applicable. In no event shall the RSC be held responsible for any errors or omissions in these Accepted Manuscript manuscripts or any consequences arising from the use of any information contained in them.
Cheminform, 2009
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Cheminform, 2004
For Abstract see ChemInform Abstract in Full Text.
Journal of Photochemistry and Photobiology A-chemistry, 2005
Interesting pH-dependent excited-state proton transfer reactions in the forms of ionic species an... more Interesting pH-dependent excited-state proton transfer reactions in the forms of ionic species and open conformer of 2-acetyl benzimidazole (2ABI) and 2-benzoyl benzimidazole (2BBI) in hydrocarbon, aqueous and alcoholic solutions at room temperature and 77 K have been ...
Journal of Organic Chemistry, 2006
A highly stereoselective surfactant-catalyzed intramolecular nitrone (formed by dehydration in wa... more A highly stereoselective surfactant-catalyzed intramolecular nitrone (formed by dehydration in water) cycloaddition in aqueous media leading to exclusive formation of a single isomer is reported. Either oxepane or pyran is formed from 3-O-allyl furanoside derivatives, which constitute the framework of a large number of biologically active compounds. Therefore, the environmentally friendly, efficient, and highly stereoselective syntheses of these chiral intermediates are still a meaningful pursuit.
Tetrahedron Letters, 2010
Dehydrative Intramolecular Nitrone Cycloaddition in Confined Aqueous Media: A Green Chemical Rout... more Dehydrative Intramolecular Nitrone Cycloaddition in Confined Aqueous Media: A Green Chemical Route to cis-Fused Chromano[4,3-c]isoxazoles. -Use of cetyltrimethylammonium bromide as catalyst for the 1,3-dipolar cycloaddition allows a clean, simple and high-yielding synthesis of the title heterocyclic compounds (III) (15 examples). -(CHATTERJEE*, A.; HOTA, S. K.; BANERJEE, M.; BHATTACHARYA, P. K.; Tetrahedron Lett. 51 (2010) 51, 6700-6703, http://dx.
Green Chemistry, 2009
The concept of green chemistry1 and its application2 in synthetic chemistry, has emerged as a maj... more The concept of green chemistry1 and its application2 in synthetic chemistry, has emerged as a major solution for the development of cleaner and more benign chemical processes. Various methodologies and routes have been developed for this purpose. Use of water as a ...
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Papers by Amrita Chatterjee