Chloride substitution induced by mechano-chemical reactions between NaBH 4 and transition metal chlorides
MetadataShow full item record
Cl - to BH4- ion substitution was induced in NaBH 4 through mechano-chemical reactions with all the first period transition metal chlorides and CdCl 2. The products were identified by Rietveld refinement of powder X-ray and neutron diffraction data to be mainly Na(BH 4) 1-xCl x. These possess cubic NaCl-type structures, with unit cell parameters between 5.7801(3) and 5.6576(2), and compositions ranging from x = 0.69 (with Cu) to 0.92 (with Zn). Infrared spectroscopy of selected samples confirms the substitution through a shift of the vibrational modes of the BH4- group towards higher wavenumbers. An observed shape change of the vibrational features from Lorentzian to Gaussian is related to the presence of the transition metal. There is no correlation between x and the thermal behavior of the samples. The lowest decomposition temperature is found for the Zn containing sample (103 °C), while Cd leads to the highest value (521 °C). Their behavior is related to the presence of NaZn(BH 4) 3 and metallic Cd in the samples, respectively. © 2011 Elsevier B.V. All rights reserved.
Showing items related by title, author, creator and subject.
Vertical distribution of heavy metals in soil profile in a seasonally waterlogging agriculture field in Eastern Ganges BasinRajmohan, N.; Prathapar, S.; Jayaprakash, M.; Ramasamy, Nagarajan (2014)The accumulation of heavy metals in soil and water is a serious concern due to their persistence and toxicity. This study investigated the vertical distribution of heavy metals, possible sources and their relation with ...
Characterizing the conformational dynamics of metal-free PsaA using molecular dynamics simulations and electron paramagnetic resonance spectroscopyDeplazes, Evelyne; Begg, S.; Van Wonderen, J.; Campbell, R.; Kobe, B.; Paton, J.; MacMillan, F.; McDevitt, C.; O'Mara, M. (2015)Prokaryotic metal-ion receptor proteins, or solute-binding proteins, facilitate the acquisition of metal ions from the extracellular environment. Pneumococcal surface antigen A (PsaA) is the primary Mn2+-recruiting protein ...
Spatial statistical estimation of undiscovered mineral endowment: case of komatiite-associated nickel sulphide resources, Kalgoorlie Terrane, Western AustraliaMamuse, Antony (2010)The Kalgoorlie Terrane of the Yilgarn Craton, Western Australia, containing about 60% (~11 Mt) of the world’s known komatiite-hosted nickel sulphide resources, is the world’s best studied and economically most important ...