Modern inorganic synthetic chemistry

xx, 590 hlm.: 27 c

Mixed anionic surfactant-templated mesoporous silica nanoparticles for fluorescence detection of Fe3+

This work demonstrates a novel method for the synthesis of large pore mesoporous silica nanoparticles (MSNs) with a pore diameter of 10.3 nm and a particle diameter of ∼50 nm based on the incorporation of mixed anionic surfactants sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulphate (SDS) as the template in the synthesis process. The dispersity, morphology, pore structure and size of mesoporous nanoparticles were adjusted by changing the molar ratio of two anionic surfactants, the concentration of the co-structure-directing agent (3-aminopropyltrimethoxysilane) and the reaction temperature. The results of synthesis experiments suggested that the formation of large pore MSNs involved a nucleation and growth process. MSNs were post-grafted with a Schiff base moiety for fluorescence sensing of Fe3+ in water. The applicability of functionalized MSNs was demonstrated by selective fluorescence detection of Fe3+ in aqueous media.Validerad; 2016; Nivå 2; 20151207 (andbra)</p

Dye-doped silica nanoparticle labels/protein microarray for detection of protein biomarkers

Predmet ovog rada je analiza sustava naplate cestarine, njegov dosadašnji razvoj i pogled na budućnost sustava. Uz glavni predmet istraživanja isprepliću se još neke povezane teme, kao što su utjecaj sustava naplate cestarine na broj vozila na cesti i utjecaj sustava naplate na okoliš

Two heterovalent copper–organic frameworks with multiple secondary building units: high performance for gas adsorption and separation and I₂ sorption and release

With the help of the multiple Secondary Building Unit (SBU) strategy, two novel heterovalent Cu–MOFs, [(C4I4)Cu4L4 (DABCO) 2]•16DMF (JLU-Liu31) and [(Cu4I4)Cu3L3 (DABCO)(DMF) 2]•18DMF (JLU-Liu32) [H2L = pyridine-3,5-bis(phenyl-4-carboxylic acid), DABCO = 1,4-diazabicyclo[2.2.2]-octane], have been successfully solvothermally synthesized and structurally characterized. Both of the two compounds feature multiple SBUs and exhibit novel topologies. JLU-Liu31 possesses the largest sustainable pore volume among the MOFs based on Cu4I4 clusters. Moreover, the adsorption behaviours of the desolvated JLU-Liu31 material for some small gases (H2, O2, CO2, CH4, C2H6 and C3H8) have been analysed in low pressure regions; meanwhile, it exhibits commendable selectivity for O2 over N2 and C3H8 over CH4. The remarkable results illustrate that JLU-Liu31 is a good candidate for application in the separation of light hydrocarbons. Additionally, JLU-Liu32 exhibits impressive performance for I2 sorption and release in solvents

Dye-doped silica nanoparticle labels/protein microarray for detection of protein biomarkers

We report a dye-encapsulated silica nanoparticle as a label, with the advantages of high fluorescence intensity, photostability, and biocompatibility, in conjunction with microarray technology for sensitive immunoassay of a biomarker, interleukin-6 (IL-6), on a microarray format. The tris(2,2'-bipyridyl)ruthenium(ii) chloride hexahydrate (Rubpy) dye was incorporated into silica nanoparticles using a simple one-step microemulsion synthesis. In this synthesis process, Igepal CA520 was used as the surfactant, therefore, no requirement of cosolvent during the synthesis and the particle size was reduced comparing to the commonly used Triton surfactant system. The nanoparticles are uniform in size with a diameter of 50 nm. The microarray fluorescent immunoassay approach based on dye-doped silica nanoparticle labels has high sensitivity for practical applications with a limit of detection for IL-6 down to 0.1 ng mL(-1). The calibration curve is linear over the range from 0.1 ng mL(-1) to 10 ng mL(-1). Furthermore, results illustrated that the assay is highly specific for IL-6 in the presence of range of cytokines or proteins. The RuDS dye-labeled nanoparticles in connection with protein microarrays show the promise for clinical diagnosis of biomarkers

Construction of Lanthanide–Organic Frameworks from 2-(pyridine-3-yl)-1<i>H</i>-4,5-imidazoledicarboxylate and Oxalate

Three novel isostructural lanthanide organic frameworks, |(H₂O)­(H₃O)|[Ln­(HPyImDC)­(OX)_0.5Cl] (Ln = Pr (<b>1</b>), Nd (<b>2</b>), and Sm (<b>3</b>), H₃PyImDC = 2-(pyridine-3-yl)-1<i>H</i>-4,5-imidazoledicarboxylic acid, H₂OX = oxalic acid) have been prepared under hydrothermal conditions and characterized by single crystal X-ray diffraction, elemental analysis, IR spectra, and thermogravimetric analysis. The results of crystal structural analysis indicate that three compounds are isomorphous 3D frameworks, which are constructed by lanthanide polyhedral {LnNClO₆}, 4-connected HPyImDC^2– ligand and bridging OX^2– ligand. The HPyImDC^2– ligand offering its four oxygen atoms and one nitrogen atom of the pyridyl group, and the OX^2– ligand offering all its four oxygen atoms coordinate with the lanthanide ions, which is a key essential for constructing the 3D frameworks. Topological analysis reveals that the 3D framework can be simplified into a 5-connected network with the lanthanide ion as a unique node, possessing the rare <b>sqp</b> topology. Meanwhile, the luminescent properties of three compounds in the solid state at room temperature are also investigated