Indranil Chakraborty
@sxccal.edu
Assistant Professor
St. Xavier's College
EDUCATION
M. Sc.; Ph. D.
RESEARCH, TEACHING, or OTHER INTERESTS
Colloid and Surface Chemistry, Materials Science, Chemistry
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Surbhi, Indrani Chakraborty, and Annu Pandey
Elsevier BV
Satya Priya Moulik, Indranil Chakraborty, and Animesh Kumar Rakshit
Wiley
AbstractAmphiphiles and surfactants are surface‐active molecules with special properties at interfaces, and they can undergo different modes of self‐association forming colloidal entities in solution. They can also stabilize other colloidal dispersions including nanoparticles, and help the formation and protection of nanodispersions resulting from chemical reactions. In this study, we have discussed the formation, properties, and applications of such nanocolloid‐like species formed in solution by different methods with special stress on various types of surfactants. Nanoparticles show the difference in melting point, electrochemical properties, conductance, etc., from their corresponding bulk material. Classical thermodynamics is used to explain this property. The basics of such processes, their types, morphology, stability, and usefulness have been presented and discussed. The types of assemblies that arise from the self‐associations of the amphiphiles, and surfactants under different conditions (i.e., micelles, reverse micelles, vesicles, liposomes, niosomes, etc.) have been also presented. Examples of their types, morphologies, transformations, and applications in relation to the stability, and functions of nanodispersions or nanocolloids are exemplified with multiple illustrations from earlier as well as recent research. The use of biosurfactants and block copolymers is also discussed. The stabilization of nanoparticles by “capping” has been discussed in some detail. A short account of the hydrothermal and solvothermal processes of synthesis of nanomaterials using amphiphiles as templates has been also presented. The multiple applications of amphiphile‐mediated nanoscience have been briefly presented and discussed.
Ipsita Kumar Sen, Indranil Chakraborty, Amit Kumar Mandal, Sunil Kumar Bhanja, Sukesh Patra, and Prasenjit Maity
Elsevier BV
Prasenjit Maity, Ipsita K. Sen, Indranil Chakraborty, Soumitra Mondal, Harekrishna Bar, Sunil K. Bhanja, Soumitra Mandal, and Gajendra Nath Maity
Elsevier BV
Sukesh Patra, Prasenjit Maity, Indranil Chakraborty, Ipsita Kumar Sen, Debosree Ghosh, Dilip Rout, and Sunil Kumar Bhanja
Elsevier BV
Indranil Chakraborty, Ipsita K. Sen, Soumitra Mondal, Harekrishna Bar, Abhijit Nayak, Sunil K. Bhanja, and Prasenjit Maity
Elsevier BV
Indranil Chakraborty and Prasenjit Maity
Elsevier BV
Prasenjit Maity, Ashis K. Nandi, Manabendra Pattanayak, Dilip K. Manna, Ipsita K. Sen, Indranil Chakraborty, Sunil K. Bhanja, Atish K. Sahoo, Nibha Gupta, and Syed S. Islam
Elsevier BV
Indranil Chakraborty, Ipsita K. Sen, Soumitra Mondal, Dilip Rout, Sunil K. Bhanja, Gajendra Nath Maity, and Prasenjit Maity
Elsevier BV
Vikash Kumar, Amrita Chatterjee, Nupur Kumar, Anasuya Ganguly, Indranil Chakraborty, and Mainak Banerjee
Elsevier BV
DilipKumar Das, AkhilBandhu Biswas, Indranil Chakraborty, AsitKumar Biswas, PuranKumar Sharma, and Romy Biswas
Medknow
National iodine deficiency disorders control program needs to be continuously monitored. Hence, a cross-sectional study was conducted during the period from April-May 2011 to assess the prevalence of goiter, status of urinary iodine excretion (UIE) level and to estimate iodine content of salts at the household level in Darjeeling district, West Bengal. Study subjects were 2400 school children, aged 8-10 years selected through "30 cluster" sampling methodology. Goiter was assessed by standard palpation technique, UIE was estimated by wet digestion method and salt samples were tested by spot iodine testing kit. Overall goiter prevalence rate was 8.7% (95% confidence intervals = 7.6-9.8) and goiter prevalence was significantly different with respect to gender. Median UIE level was 15.6 mcg/dL (normal range: 10-20 mcg/dL). About 92.6% of the salt samples tested had adequate iodine content of ≥15 ppm. Findings of the present study indicate that the district is in a transition phase from iodine-deficiency to iodine sufficiency.
Batakrishna Jana, Goutam Mondal, Atanu Biswas, Indrani Chakraborty, Abhijit Saha, Prashant Kurkute, and Surajit Ghosh
Wiley
A versatile method of dual chemical functionalization of graphene oxide (GO) with Tris‐[nitrilotris(acetic acid)] (Tris‐NTA) and biotin for cellular delivery of oligohistidine‐ and biotin‐tagged biomolecules is reported. Orthogonally functionalized GO surfaces with Tris‐NTA and biotin to obtain a dual‐functionalized GO (DFGO) are prepared and characterized by various spectroscopic and microscopic techniques. Fluorescence microscopic images reveal that DFGO surfaces are capable of binding oligohistidine‐tagged biomolecules/proteins and avidin/biotin‐tagged biomolecules/proteins orthogonally. The DFGO nanoparticles are non‐cytotoxic in nature and can deliver oligohistidine‐ and biotin‐tagged biomolecules simultaneously into the cell.
Indranil Chakraborty, Tanushree Chakraborty, and Satya P. Moulik
Springer Science and Business Media LLC
Abhijit Saha, Goutam Mondal, Atanu Biswas, Indrani Chakraborty, Batakrishna Jana, and Surajit Ghosh
Royal Society of Chemistry (RSC)
A novel approach for mimicking Aβ aggregation and its infection pathway using a liposome as an artificial cell environment.
Abhijit Saha, Indrani Chakraborty, Christian Kraft, Shashi Bhushan, and Surajit Ghosh
Royal Society of Chemistry (RSC)
A novel Tris-NTA functionalised SiO2 EM grid is generated through covalent chemical functionalisation. Here, we show immobilisation of functional oligohistidine-tagged proteins and nucleation of microtubules from microtubule polymerase immobilised on the SiO2 EM grid surface.
Batakrishna Jana, Goutam Mondal, Atanu Biswas, Indrani Chakraborty, and Surajit Ghosh
Royal Society of Chemistry (RSC)
The development of multifunctional, biocompatible nanoparticles is essential for delivering drugs and biomolecules into the cell. Here, we have functionalised TiO2 nanoparticles with tris-(nitrilo trisacetic acid) (Tris-NTA) and biotin, by covalent surface functionalisation. This biocompatible nanoparticle is non-cytotoxic and can deliver both oligo-histidine and avidin conjugated biomolecules simultaneously into the cell.
Tanushree Chakraborty, Indranil Chakraborty, and Soumen Ghosh
Elsevier BV
Tanushree Chakraborty, Indranil Chakraborty, Satya P. Moulik, and Soumen Ghosh
American Chemical Society (ACS)
In this paper, results of physicochemical studies on the interaction of bovine serum albumin (BSA) with alkyltrimethylammonium bromide (ATAB), pentaethylene glycol mono-n-dodecyl ether (C12E5), and sodium dodecyl sulfate (SDS) under the experimental conditions of phosphate buffer at pH 7 in the presence of 10 mM sodium bromide (NaBr), maintaining the ionic strength of the overall solution at micro = 0.015 M, have been presented and discussed. Here, BSA-ATAB corresponds to a polyion-surfactant system bearing opposite charges. BSA precipitated out of the solution on addition of ATAB solution over a certain range of ATAB concentration, the concentration range being dependent on the particular member of the ATAB family. In our earlier reports on the precipitation of oppositely charged polymer-surfactant, the tensiometric profile for surfactant addition in polymer solution differed significantly from that expected from addition of surfactant in the dispersion medium. In the present study, the precipitation process could hardly affect the smoothness of the tensiometric profile. This indicates the interaction process is operative in bulk solution. Microcalorimetric profiles also evidenced an extra hump in the interaction profile at lower surfactant concentrations, without much affecting the dilution enthalpograms beyond micellization. This interaction appeared unimodal and the extent of interaction increased with increasing tail length of ATAB, evidencing the hydrophobic effect to be an important factor. Addition of salt (NaBr) also affected the nature of interaction: at lower concentration of NaBr, the interaction was mildly assisted, whereas 50 mM NaBr fairly assisted the interaction. The nonionic surfactant C12E5 modestly interacted with BSA. The anionic amphiphile SDS, on the other hand, interacted with BSA in two distinctly different stages, as evidenced from the tensiometric profile. The complexity of the BSA-SDS tensiometric isotherm compared to that of BSA-ATAB arose from the presence of cationic binding sites adjacent to hydrophobic patches of BSA in its native state, so that electrostatic and hydrophobic interactions can cooperatively operate side by side. The interfacial saturation occurred at a lower concentration in the presence of BSA compared to the normal cmc of SDS under identical solution conditions in the absence of BSA, which was slightly delayed for nonionic C12E5. The multitechnique approach evidenced that different experimental techniques probe different physicochemical phenomena and an attempt to show the concurrence of the break points in different techniques is only diluting the essence of this area.
Indranil Chakraborty, Peter Baran, Yiannis Sanakis, Athanassios Simopoulos, Esteban Fachini, and Raphael G. Raptis
American Chemical Society (ACS)
A formally Fe(III)(7)Fe(II) complex, containing an inner Fe(4)O(4)-cubane and four peripheral Fe centers, is derived from the one-electron reduction of its Fe(III)(8) precursor. Spectroscopic analysis of the former reveals that the redox activity of this Fe(8) system is confined within its cubane core. The resulting (Fe(4)O(4))(3+)-cubane, which is valence-delocalized in the NMR, Mössbauer, and IR spectroscopy time scales but valence-trapped in the X-ray photoelectron spectroscopy (XPS) time scale, is better described as a Robin-Day class-II system by the analysis of its near-infrared (NIR) intervalence charge transfer (IVCT) band profile.
Marlyn Rivera-Carrillo, Indranil Chakraborty, Gellert Mezei, Richard D. Webster, and Raphael G. Raptis
American Chemical Society (ACS)
Trinuclear Cu (II)-complexes of formula [Cu (II) 3(mu 3-E)(mu-4-R-pz) 3X 3] (+/- n ), E = O and OH; R = H, Cl, Br, CH(O) and NO 2; X = Cl, NCS, CH 3COO, and py, have been synthesized and characterized and the effect of substitution of terminal ligands, as well as 4-R-groups, in the one-electron oxidation process has been investigated by cyclic voltammetry. In situ UV-vis-NIR spectroelectrochemical characterization of the mixed valence Cu 3 (7+)-complex [Cu 3(mu 3-O)(mu-pz) 3Cl 3] (-) revealed an intervalence charge transfer band at 9550 cm (-1) (epsilon = 2600 cm (-1) M (-1)), whose analysis identifies this species as a delocalized, Robin-Day class-III system, with an electronic coupling factor, H ab, of 4775 cm (-1).
Dilip Rout, Soumitra Mondal, Indranil Chakraborty, and Syed S. Islam
Elsevier BV
Debabrata Maiti, Krishnendu Chandra, Subhas Mondal, Arnab K. Ojha, Debsankar Das, Sadhan K. Roy, Kaushik Ghosh, Indranil Chakraborty, and Syed S. Islam
Elsevier BV
Peter Baran, Roman Boča, Indranil Chakraborty, John Giapintzakis, Radovan Herchel, Qing Huang, John E. McGrady, Raphael G. Raptis, Yiannis Sanakis, and Athanasios Simopoulos
American Chemical Society (ACS)
A one-pot synthetic procedure yields the octanuclear Fe(III) complexes Fe(8)(micro(4-)O)(4)(micro-pz(*))(12)X(40, where X = Cl and pz(*) = pyrazolate anion (pz = C(3)H(3)N(2)-) (1), 4-Cl-pz (2), and 4-Me-pz (3) or X = Br and pz(*) = pz (4). The crystal structures of complexes 1-4, determined by X-ray diffraction, show an Fe(4)O(4)-cubane core encapsulated in a shell composed of four interwoven Fe(micro-pz(*))(3)X units. Complexes 1-4 have been characterized by 1H NMR, infrared, and Raman spectroscopies. Mössbauer spectroscopic analysis distinguishes the cubane and outer Fe(III) centers by their different isomer shift and quadrupole splitting values. Electrochemical analyses by cyclic voltammetry show four consecutive, closely spaced, reversible reduction processes for each of the four complexes. Magnetic susceptibility studies, corroborated by density functional theory calculations, reveal weak antiferromagnetic coupling among the four cubane Fe centers and strong antiferromagnetic coupling between cubane and outer Fe atoms of 1. The structural similarity between the antiferromagnetic Fe(8)(micro(4-)O)(4) core of 1-4 and the antiferromagnetic units contained in the minerals ferrihydrite and maghemite is demonstrated by X-ray and Mössbauer data.