A5102946994- Metal complexes synthesis and properties
- Organometallic Complex Synthesis and Catalysis
- Magnetism in coordination complexes
- ZnO doping and properties
- Inorganic and Organometallic Chemistry
- Surface Modification and Superhydrophobicity
- Quantum Dots Synthesis And Properties
- Asymmetric Hydrogenation and Catalysis
- Advanced Photocatalysis Techniques
- Chemical Synthesis and Analysis
- Electrochemical Analysis and Applications
- Fluid Dynamics and Heat Transfer
- Layered Double Hydroxides Synthesis and Applications
- Organometallic Compounds Synthesis and Characterization
- Mesoporous Materials and Catalysis
- Copper-based nanomaterials and applications
- Aerogels and thermal insulation
- Gas Sensing Nanomaterials and Sensors
- Surfactants and Colloidal Systems
- Carbon and Quantum Dots Applications
- Magnesium Oxide Properties and Applications
- Fluid Dynamics Simulations and Interactions
- Microbial bioremediation and biosurfactants
- Nanoplatforms for cancer theranostics
- Solar-Powered Water Purification Methods
Unilever (India)
2006-2019
Bangalore University
2014-2017
Central Salt and Marine Chemicals Research Institute
2006
Indian Association for the Cultivation of Science
1993-1997
Indian Institute of Technology Kanpur
1996
The development of light harvesting systems based on heterostructures for efficient conversion solar energy to renewable is an emerging area research.
In this work, we report a large-area fabrication of flexible superhydrophobic bactericidal surface decorated with copper hydroxide nanowires. This involves simple two-step method which growth followed by transfer the nanowires onto polydimethylsiloxane (PDMS) mechanical peeling. Additional roughness in PDMS is obtained through incomplete wetting nanoscale gaps leads to dual-scale and superhydrophobicity contact angle 169° hysteresis less than 2°. The simplicity process makes it low-cost...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of the ruthenium [Ru(RQ)(tap)2]z family: authentic catecholates, reduction potentials, and spectra (RQ = quinone/semiquinone/catecholate; tap 2-(m-tolylazo)pyridine; z 0, .+-., .+-.2)Nilkamal Bag, Amitava Pramanik, Goutam Kumar Lahiri, Animesh ChakravortyCite this: Inorg. Chem. 1992, 31, 1, 40–45Publication Date (Print):January 1992Publication History Published online1 May 2002Published inissue 1 January...
ctc-Ru(L)2(Cl)2, 1 [L = pyridine-2-azobenzene], reacts with EtOCS2K to give an unusual product, 3, where the ortho-carbon atom of pendant phenyl ring each L is selectively thiolated. Crystal structure and spectra compound 3 are reported.
The effect of citrate as a crystal habit modifier on the morphology zinc oxide has been explored in wide range citrate/Zn ratio from 0 to 0.67. With an increase concentration at lower ratio, aspect hexagonal prismatic crystals ZnO decreases, forming flatter disks with progressive roughness face. At intermediate ratios, otherwise smooth rectangular faces also become rough, formation porous spherical aggregates. high citrate, solid particles form very low crystallinity, eventually plate-like...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomer preference of oxidation states. Chemistry the bis(triphenylphosphine)bis(xanthato)osmium(z) (z = 0, +) familyAmitava Pramanik, Nilkamal Bag, Debashis Ray, Goutam Kumar Lahiri, and Animesh ChakravortyCite this: Inorg. Chem. 1991, 30, 3, 410–417Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Published inissue 1 February...
A novel cone-shaped superhydrophobic and oleophilic CaAl-LDH intercalated with dodecyl sulphate (DS(-)) anions was synthesized from calcium as a precursor via one-step hydrothermal method. The LDH has been successfully utilized in mopping regeneration of oil oil-water mixtures.
The development of nanomaterial-based hybrid systems for healthcare and energy-related materials has attracted significant attention nowadays. Here, we have designed a nanocomposite ZnO nanoparticles (NPs) with anticancer therapeutic drug 9-aminoacridine hydrochloride hydrate (9AA-HCl) antibacterial photocatalytic activities. Spectroscopic studies reveal that the photoinduced electron transfer from photoexcited 9AA-HCl to conduction band NP causes generation reactive oxygen species (ROS),...
The title systems are Re(V)OCl(3)(RA), 1, Re(III)(OPPh(3))Cl(3)(RA), 2, and Re(IV)(OPPh(3))Cl(3)(RB), 3, where RA is a 2-pyridinecarboxaldimine, p-RC(6)H(4)N=CHC(5)H(4)N, RB(-) the corresponding 2-picolinamide, p-RC(6)H(4)NC(=O)C(5)H(4)N(-) (R = H, Me, OMe, Cl). Controlled reaction of ReOCl(3)(PPh(3))(2) with affords which converted to 2 upon PPh(3). oxidation in aqueous media by Ce(4+) or H(2)O(2) furnishes 3. X-ray structure 1 Me) has revealed meridional ReCl(3) geometry, oxo atom lying...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFacile Aldimine .fwdarw. Amide Oxidation in a Rhenium ComplexMahua Menon, Amitava Pramanik, Nilkamal Bag, and Animesh ChakravortyCite this: Inorg. Chem. 1994, 33, 3, 403–404Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Published inissue 1 February 1994https://pubs.acs.org/doi/10.1021/ic00081a001https://doi.org/10.1021/ic00081a001research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRuthenium(II) phenolates. Synthesis and characterization of a novel four-membered metallacycleNilkamal Bag, Suranjan Bhanja Choudhury, Amitava Pramanik, Goutam Kumar Lahiri, Animesh ChakravortyCite this: Inorg. Chem. 1990, 29, 25, 5013–5014Publication Date (Print):December 1, 1990Publication History Published online1 May 2002Published inissue 1 December...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmide Formation from Aldimine and Water Promoted by Coordinated Metal Redox. Chemistry of a Family Isomeric RuII(diimine)2Cl2, RuIII(diimine)2Cl2+, RuIII(diimine)(amide-imine)Cl2 ComplexesMahua Menon, Amitava Pramanik, Animesh ChakravortyCite this: Inorg. Chem. 1995, 34, 12, 3310–3316Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June...
A practical approach to recycle glycine as habit modifier produce rhombic dodecahedron shaped NaCl crystals from saturated solution is reported. It also shown that the method applicable solar salt production natural brines. The modified have better flow characteristics than those of their cubic counterparts.
The reaction of carbonylhalo[4-methyl-6-(NR-iminiomethyl)phenolato-C2,O]bis(triphenylphosphine)metal(II), MII(η2-RL)(PPh3)2(CO)X (M = Ru, Os; X Cl, Br; R Ph, p-MeC6H4), 1, with sodium carboxylates has afforded carbonyl(carboxylato)[4-methyl-6-(NR-iminomethyl)phenol-C2]bis(triphenylphosphine)metal(II), MII(η1-RL)(PPh3)2(CO)(η2-R'CO2) (R' Me, Ph), 2. is believed to proceed via initial associative cis attack on halide by carboxylate. 2 → 1 occurs upon treatment excess halide. Spectral (UV−vis,...
The syntheses of mixed thioxanthate (trithiocarbonate)–phosphine complexes types cis-[Ru(RSCS2)2(PPh3)2](1) and trans-[Ru(RSCS2)2(PPh3)2]PF6(2+) are reported (R = Et, Pri, or PhCH2). These along with trans-[Ru(RSCS2)2(PPh3)2](2) cis-[Ru(RSCS2)2(PPh3)2]+(1+) constitute an electrochemically observable redox isomerisation cycle. formal potentials the couples (1+)–(1) (2+)–(2) ≈ 0.65 0.33 V respectively vs. saturated calomel electrode (s.c.e.). steps (1+)→(2+)(fast) (2)→(1)(k≈ 7.0 × 10–2 s–1)....
The reaction of [Ru(PPh3)3Cl2] with 8-hydroxyquinoline (HL) has afforded [RuL2(PPh3)2] in two isomeric forms, one red and yellow-green, the RuN2O2P2 co-ordination sphere being cis,trans,cis trans,trans,trans respectively. Chemical or electrochemical oxidation either isomer affords exclusively red-brown trans,trans,trans-[RuL2(PPh3)2]+ isolated as PF6– salt. latter complex is one-electron paramagnetic (low-spin t25) frozen glass (77 K) displays a rhombic EPR spectrum. Reduction...
The title reaction is exemplified by the high yield conversions 1→2 and 3→4 H2O2, X-ray structures of 2 4 are reported; species 1+ 3+ afford respectively when treated with water.
Catechin, a bioflavonoid, found in green tea leaves has various applications the food and pharmaceutical industries.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of [Ru(1,3-diaryltriazenide)2(PPh3)2]z (z = 0, +). A Hindered RuII,IIIN2P2 Family with Valence-Independent GeometryMahua Menon, Amitava Pramanik, Surajit Chattopadhyay, Nilkamal Bag, and Animesh ChakravortyCite this: Inorg. Chem. 1995, 34, 6, 1361–1367Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https://doi.org/10.1021/ic00110a012RIGHTS & PERMISSIONSArticle...
The reactions of KCN, NaBH4, or NaOH with [(η6-C6H6)RuL](PF6)2 {L = (2-pyridylethyl)(2-pyridylmethyl)methylamine} afford cyclohexadienyl complexes type [(η5-C6H6(Y))RuL](PF6), (Y CN- (1), H- (2), OH- (3)). X-ray structure 1 has been determined. A spectroelectrochemical trend is observed.
The reaction of mer-[Re(MeCN)(PPh3)2Cl3] with 2-(arylazo)pyridines (L) affords dark green, diamagnetic, 1 : electrolytes [ReL2Cl2]Cl (aryl L = Ph, m-MeC6H4 or p-ClC6H4). ReCl2 moiety is cis(two Re–Cl stretches) and the cation has an overall two-fold symmetry axis (1H NMR spectra). co-ordinated pyridine-nitrogen atoms azo-nitrogen each ligand are assigned relative trans cis geometries respectively. NN stretching frequencies low (1280–1290 cm–1) implying significant Re(t2)–azo(π*) back...