Articles written in Journal of Chemical Sciences
Volume 102 Issue 3 June 1990 pp 418-462
Bhaskar G Maiya S M S Chauhan P Bhyrappa V Krishnan P K Bhardwaj Sabyasachi Sarkar Krishna B Pandeya Pavan Mathur Akhil R Chakravarty Birinchi K Das Digambar V Behere Sandeep Modi Samaresh Mitra Sandeep Modi Digambar V Behere Samaresh Mitra Anil Saxena Sandeep Modi Digambar V Behere S Mitra Shyamalava Mazumdar Okhil K Medhi Samaresh Mitra Shyamalava Mazumdar Samaresh Mitra Anup Madan Sandeep Modi Anil Saxena Digamber V Behere S Mitra T Pandiyan M Palaniandavar K L Narayanan H Manohar R Ramaraj C C Thomas S Rajagopal T Rajendra C Srinivasan P Ramamurthy R Roy M C Saha S Panchanan P S Roy C Balagopalakrishna M V Rajasekharan B V Agarwala S Hingorani G A Nagena Gowda Y S Ramaswamy R Halesha N M N Gowda G K N Reddy G C Saxena K L Gupta P Srivastava V D Gupta M Ray R N Mukherjee R N Mohanty K C Dash Ramesh Kapoor S Yadav V Sood P Kapoor B N Anand R Bains Usha K Aggarwal P Garge R Chikate S Padhye J M Savariault P De Loth J P Tuchgues V K Jain M A Vaidya S C Jain S Kalyan Kumar Harkesh B Singh K M Mangaonkar D N Patkar N K Jha Pankaj Sharma S K Date C E Deshpande S D Sathaye S B Deshpande H S Potdar V S Darshane A C Dash R K Nanda N N Das S Gangopadhyay P Banerjee S K Kulshreshtha P S Zacharias N Arulsamy T Ramasami V Subramanian B U Nair M Kanthimathi G Sundararajan V Shivasubramanian R G Bhattacharya S Biswas J Armstrong E M Holt A P Koley
Volume 103 Issue 2 February 1991 pp 195-200 Rapid Communication
Two distinct reaction mechanisms are proposed for the reactions of
Volume 118 Issue 4 July 2006 pp 351-359
N-Bromo-arylsulphonamides of different oxidizing strengths are used for studying the kinetics of oxidation of D-fructose and D-glucose in aqueous alkaline medium. The results are analysed and compared with those from the sodium salts of N-bromo-benzenesulphonamide and N-bromo-4-methylbenzenesulphonamide. The reactions show zero-order kinetics in [oxidant], fractional order in [Fru/Glu] and nearly first order in [OH-]. Rates of oxidation of fructose are higher than those for glucose with the same oxidant. Similarly,
Volume 120 Issue 6 November 2008 pp 627-635
We have modelled for the first time a chemodosimeter for As(III) detection in water. The chemodosimeter modelled is a 1,3-dithiole-2-thione derivative with an anthracene unit which has been previously described as a chemodosimeter for Hg(II) detection. Quantum chemical calculations at the DFT level have been used to describe the binding energies and selectivity of the chemodosimeter. We find that the dosimeter action is intrinsically dependent on the thiophillic affinity and the coordination sphere of the metal ion. Binding studies for a series of metal ions: Pb(II), Cd(II), Hg(II), Ni(II) and As(III) followed by an analysis of the complete reaction pathway explains the high selectivity of the dosimeter towards As(III). The dosimeter efficiency is calculated as 66% for As(III)-ion.
Volume 126 Issue 3 May 2014 pp 617-626 Regular Articles
The electrocatalytic activity of Ag-doped lanthanum chromites electrode materials viz., LaCr0.4Ag0.6O3 and LaCr0.7Ag0.3O3 prepared by decomposing the precursor complex is studied. Pure LaCrO3 is synthesized by combustion route using oxalic acid as a fuel. The decomposition behaviour of the assynthesized powder obtained in the latter method is characterized by TGA-DTA and XRD. Both the precursor complex and the as-synthesized powder are calcined at 900°C for 7 and 10 h, respectively. XRD of the final product after calcinations indicated the formation of perovskite phase with minor amounts of impurity phases of component oxides in the Ag-doped lanthanum chromites and pure perovskite phase in the undoped one. The surface morphology of the perovskites is studied by SEM. The electrocatalytic activity of the perovskite powders for borohydride oxidation is studied by using cyclic voltammetry (CV) at a catalyst loading of 0.7 mgcm−2 for both Ag-doped and undoped LaCrO3 coated on glassy carbon substrate. Calibration plots are obtained by plotting the anodic peak current versus concentration of borohydride in the range of 20-100 mM. The sensitivities of the three perovskites towards borohydride oxidation indicated that LaCr0.4Ag0.6O3 is the best among all the perovskites studied giving a value of 1.395 𝜇A/mM.
Volume 127 Issue 11 November 2015 pp 2051-2061 Articles
Three 1,5-benzodiazepines viz., 𝑁5-chloroacetyl-, 𝑁5-piperazinoacetyl- and N5 -morpholinoacetyl-2,2,4-trimethyl-1H-1,5-benzodiazepines have been synthesized. The structural characterisation and the conformational preferences of the compounds have been carried out using IR, 1D and 2D NMR spectral data. The NMR spectral data show that the 𝑁-acetyltetrahydro-1,5-benzodiazepines prefer to exist in boat conformation with exo orientation of >C=O at 𝑁5 position in the solution state. The X-ray crystal structure of 𝑁5-morpholinoacetyl-2,2,4-trimethyl-1H-1,5-benzodiazepine also supports boat conformation in the solid state. The antimicrobial activity for 𝑁-acetyltetrahydro-1,5-benzodiazepines have been carried out. 𝑁-morpholinoacetyl-2,2,4-trimethyl-1H-1,5-benzodiazepine demonstrated better antibacterial and antifungal activities.
Volume 131 | Issue 11
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