title: Template-free synthesis of a porous organic-inorganic hybrid tin(IV) phosphonate and its high catalytic activity for esterification of free fatty acids.
abstract: Here we have synthesized an organic-inorganic hybrid mesoporous tin phosphonate monolith (MLSnP-1) with crystalline pore walls by a template-free sol-gel route. N2 sorption analysis shows Brunauer-Emmett-Teller (BET) surface area of 347 m2 g(-1). Wide-angle powder X-ray diffraction (PXRD) pattern shows few broad diffraction peaks indicating crystalline pore wall of the material. High-resolution transmission electron microscopic (HR TEM) image further reveals the crystal fringes on the pore wall. Framework bonding and local environment around phosphorus and carbon were examined by Fourier transform infrared (FT IR) spectroscopy and solid-state MAS NMR spectroscopy. The material exhibits remarkable catalytic activity for esterification of long chain fatty acids under mild reaction conditions at room temperature.
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700032, India.
authors.forename: Arghya
authors.initials: A
authors.lastname: Dutta
authors.forename: Astam K
authors.initials: AK
authors.lastname: Patra
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Uyama
authors.forename: Asim
authors.initials: A
authors.lastname: Bhaumik
mesh_terms: D000327:Adsorption; D002384:Catalysis; D003460:Crystallization; D004951:Esterification; D005230:Fatty Acids, Nonesterified / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D009584:Nitrogen; D010757:Phosphorous Acids / Q000737:chemistry*; D016062:Porosity; D013696:Temperature; D014001:Tin / Q000737:chemistry*
chemical_list: D005230:Fatty Acids, Nonesterified; D007477:Ions; D010757:Phosphorous Acids; C570063:phosphonic acid; D014001:Tin; D009584:Nitrogen