Duraisamy Senthil Raja

A mesoporous aluminium metal–organic framework with 3 nm open pores

A mesoporous metal–organic framework of [Al(OH)(SDC)] (CYCU-3) (H2SDC = 4,4′-stilbenedicarboxylic acid) was synthesised by using Al(III) ions and H2SDC under solvothermal conditions. The structure forms 3D mesoporous frameworks in which the carboxylate oxygen on each terminus of the ligand forms octahedral AlO6 by corner-sharing. As verified by N2 sorption measurements, the CYCU-3 exhibits the largest pore volume and open channels (3.0 nm) in the system of Al-MOFs reported to date. This mesoporous Al-MOF also displays highly porous properties and uptake capacities of H2 (8.22 mmol g−1 at 77 K and 1 atm) and CO2 (2.83 mmol g−1 CO2 at 273 K and 1 atm).

Immobilization of Protein on Nanoporous Metal-Organic Framework Materials

Recently, metal-organic frameworks (MOFs) have been gaining attention as attractive support materials for the immobilization of proteins. They possess well-ordered pore structures, aperture channel distributions, great surface area, high stability, and can be modified with various functional groups. In this review, we present an overview of the reported fabrication methods of these materials along with the advantages and limitations of different approaches to immobilizing enzymes using MOF materials as support. GRAPHICAL ABSTRACT

Metal-Organic Frameworks to Metal/Metal Oxide Embedded Carbon Matrix: Synthesis, Characterization and Gas Sorption Properties

Three isostructural metal-organic frameworks, (MOFs), [Fe(OH)(1,4-NDC)] (1), [Al(OH)(1,4-NDC)] (2), and [In(OH)(1,4-NDC)] (3) have been synthesized hydrothermally by using 1,4-naphthalene dicarboxylate (1,4-NDC) as a linker. The MOFs were characterized using various techniques and further used as precursor materials for the synthesis of metal/metal oxide nanoparticles inserted in a carbon matrix through a simple thermal conversion method. The newly synthesized carbon materials were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy analysis, powder X-ray diffraction and BET analysis. The results showed that the MOF-derived carbon composite materials maintained the morphology of the original MOF upon carbonization, and confirmed the insertion of metal/metal oxide particles in the carbon matrix.

Carbonization and oxidation of metal–organic frameworks based on 1,4-naphthalene dicarboxylates

Abstract Three new isostructural metal–organic frameworks (MOFs), [V(OH)(NDC)] (1), [Cr(OH)(NDC)] (2), and [Ga(OH)(NDC)] (3) have been synthesized hydrothermally using 1,4-naphthalene dicarboxylate (NDC) as the linker. These MOFs (1, 2 and 3) have been used as a template for the synthesis of metal-oxide-inserted nanoporous carbon materials. The newly synthesized MOFs and the resulting porous carbon hybrid functional materials have been characterized using powder x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive x-ray spectroscopic analysis. Results show that compounds 2 and 3 form their respective metal oxide nanoparticles on the surface of the carbon materials during carbonization at 800 °C. The gas sorption properties of the new MOFs and their corresponding carbon frameworks have been reported.

Synthesis, Crystal Structure, and Luminescence Properties of a New Calcium(II) Coordination Polymer Based on L-Malic Acid

A new calcium coordination polymer [Ca(HL-MA)]n (H3L-MA = L-malic acid) has been solvothermally synthesized. The structure of the newly synthesized complex has been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, reflectance UV-Vis & IR spectra, powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). The single crystal structure analysis showed that the complex forms three-dimensional framework. The new Ca(II) complex has displayed very high thermal stability which was inferred from TGA and PXRD results. As far as the optical property of the new complex is concerned, the complex emitted its own characteristic sensitized luminescence.