Publications by authors named "Raghunandan K Bhakta"
We demonstrate that NaAlH(4) confined within the nanopores of a titanium-functionalized metal-organic framework (MOF) template MOF-74(Mg) can reversibly store hydrogen with minimal loss of capacity. Hydride-infiltrated samples were synthesized by melt infiltration, achieving loadings up to 21 wt %. MOF-74(Mg) possesses one-dimensional, 12 Å channels lined with Mg atoms having open coordination sites, which can serve as sites for Ti catalyst stabilization.
View Article and Find Full Text PDFReactive nanoparticles are of great interest for applications ranging from catalysis to energy storage. However, efforts to relate cluster size to thermodynamic stability and chemical reactivity are hampered by broad pore size distributions and poorly characterized chemical environments in many microporous templates. Metal hydrides are an important example of this problem.
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- Metal-organic frameworks (MOFs) provide a controlled environment for synthesizing nanoclusters, making them a better alternative to traditional templates.
- MOFs are stable hosts for metal hydrides and their precursors, allowing researchers to test theoretical predictions regarding hydrogen desorption at the nanoscale.
- Using MOF HKUST-1, researchers successfully synthesized small NaAlH(4) nanoclusters, which release hydrogen at much lower temperatures than the bulk material, though the decomposition process is more complex than previously thought.
Novel mixed amido-malonato complexes of titanium are reported. The complexes were synthesized by partially replacing the amido groups from the complexes [Ti(NMe2)4] and [Ti(NEt2)4] via Brønstedt acid/base reactions, using the malonate-ligands di-isopropylmalonate (Hdpml) and di-tert-butylmalonate (Hdbml). Four representative complexes were synthesized and fully characterised by 1H NMR, 13C NMR, CHN analysis and mass spectrometry.
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