BITS Faculty Publications

Permanent URI for this communityhttp://localhost:4000/handle/123456789/1867

Browse

Filters

2008 - 200912010 - 20112

Settings

Author: search.filters.author.Basu, MrinmoyeeSubject: search.filters.subject.Alcohols

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Resin-Immobilized CuO and Cu Nanocomposites for Alcohol Oxidation
    (ACS, 2008) Basu, Mrinmoyee; Pande, Surojit
    Resin immobilized stable, spherical CuO nanoparticles prepared in the presence of cyclodextrin (CD) act as catalysts for liquid phase alcohol oxidation in air. The catalytic activity of the CuO nanocomposites and its green chemistry approach make it superior to the related resin-bound Cu(0) nanocomposite. The effect of alcohol chain length and electron-donating or -withdrawing groups influence product yield. The nanocomposites exhibit good reusability, simple workup procedure, and a straightforward approach to aldehyde formation.
  • No Thumbnail Available
    Item
    Thermodynamic and Kinetics Aspects of Spherical MnO2 Nanoparticle Synthesis in Isoamyl Alcohol: An Ex Situ Study of Particles to One-Dimensional Shape Transformation
    (ACS, 2010) Basu, Mrinmoyee
    Thermodynamically stable and robust α-MnO2 nanowire has been obtained in gram quantity from low cost starting materials KMnO4 and isoamyl alcohol. Here KMnO4 acts as an oxidizing agent and eventually produces the corresponding acid which caps the spherical MnO2 particles. The MnO2 nanoparticle formation is monitored by UV−visible spectrophotometry, and the activation energy of the reaction is reported to be 44−49 kJ mol−1. The particles upon modified hydrothermolysis (MHT) reaction produce nanofibrils and the nanofrabrils finally evolved stable α-MnO2 nanowires by heat treatment. The spherical MnO2 nanoparticles under MHT conditions undergo oriented attachment and result in MnO2 nanofibrils, i.e., the shape transformation takes place from spherical MnO2 nanoparticles to nanofibrils. This has been documented in this study. The nanofibrils, being thermally unstable, upon heat treatment easily change to robust single-crystalline defect-free α-MnO2 nanowires with an exact angle of 90° between (200) and (002) crystal planes.
  • No Thumbnail Available
    Item
    Solvent effect on the optical property of uranyl acetylacetonate monohydrate
    (Elsiever, 2011-01) Basu, Mrinmoyee
    The lability of the [UO2(acac)2H2O] complex has been exploited to decipher solvent composition of a medium. Successive blue shift of the π–π* band (λmax = 282 nm) is observed due to alcohol substitution of increasing chain length in place of water. This observation helps to quantify the chain lengths of normal alcohol. The result has been accounted theoretically. However, in non-coordinating solvent, irregular red shift of the π–π* band is observed because of the molecular complexity. Again, charge transfer (CT) band at 211 nm has been identified employing polar–polar and polar coordinating–non-coordinating solvent systems.