107984-01-0Relevant articles and documents
Synthesis of nano-pore size Al(III)-imprinted polymer for the extraction and preconcentration of aluminum ions
Shakerian, Farid,Dadfarnia, Shayessteh,Shabani, Ali Mohammad Haji
, p. 669 - 676 (2013)
In this study, an ion imprinted polymer (IIP) was prepared for the selective separation and preconcentration of trace levels of aluminum. Al(III) IIP was synthesized in the presence of Al(III)-8-hydroxyquinoline (oxine) complex using styrene and ethylene glycol dimethacrylate as a monomer and crosslinker, respectively. The imprinted Al(III) ions were completely removed by leaching the IIP with HCl (50 % v/v) and were characterized by FTIR and scanning electron microscopy. The maximum sorption capacity for Al(III) ions was found to be 3.1 mg g-1 at pH 6.0. Variables affecting the IIP solid phase extraction were optimized by the univariable method. Under the optimized conditions, a sample volume of 400 mL resulted in an enhancement factor of 194. The detection limit (defined as 3 S b/m) was found to be 1.6 μg L-1. The method was successfully applied to the determination of aluminum in natural water, fruit juice and cow milk samples.
Synthesis of reactive [Al(Et)(q′)2] (q′ = 2-methyl-8-quinolinolato) serving as a precursor of light emitting aluminum complexes: Reactivity, optical properties, and fluxional behavior of the aluminum complexes
Iijima, Takayuki,Yamamoto, Takakazu
, p. 5016 - 5023 (2006)
Reaction of AlEt3 with 2-methyl-8-quinolinol gave ethylbis(2-methyl-8-quinolinolato)aluminum complex [Al(Et)(q′)2] 1. The complex 1 provided photoluminescent Al complexes by reactions with phenols, carboxylic acid, and H2O. The α-CH2 hydrogens in the Et group of 1 was diastereotropic as revealed by 1H NMR spectroscopy because of the presence of a chiral center at Al. The chirality at Al was dynamically lost at elevated temperature in CDCl2CDCl2 and DMSO-d6, as indicated by temperature dependent 1H NMR spectroscopy. This dynamic or fluxional behavior of 1 is explained by rotation of the 2-methyl-8-quinolinolato ligand. The kinetic parameters of the dynamic process were estimated at ΔH?? = 135 kJ mol-1 and ΔS? = 159 J K-1 mol-1 in CDCl2CDCl2 and at ΔH? = 124 kJ mol-1 and ΔS? = 151 J K-1 mol-1 in DMSO-d6, respectively, at 350 K. Structures of some of the obtained Al complexes were confirmed by single-crystal X-ray crystallography. These Al complexes showed photoluminescence peaks at 492-507 nm in CHCl3 with quantum yields of 7-23%.
Surfactant-assisted hydrothermal route to organometallic tris(8-hydroxyquinoline)aluminum nanorod bundles
Ma, Dekun,Zhang, Junhao,Hu, Xiaokai,Zhou, Hongyang,Qian, Yitai
, p. 630 - 631 (2007)
A new surfactant-assisted hydrothermal route was presented to prepare organometallic tris(8-hydroxyquinoline)aluminum nanorod bundles on a large scale. In this hydrothermal system, sodium dodecylbenzenesulfonate (Chemical formula: C12H25-C6H4-SO 3Na, SDBS) played key roles in controlling the morphology and quality of the resultant products. The as-prepared nanorod bundles showed enhanced PL emission compared to submicron particles prepared by the same hydrothermal method. Copyright
Understanding M-ligand bonding and: Mer -/ fac -isomerism in tris(8-hydroxyquinolinate) metallic complexes
Lima, Carlos F.R.A.C.,Taveira, Ricardo J. S.,Costa, José C. S.,Fernandes, Ana M.,Melo, André,Silva, Artur M. S.,Santos, Luís M.N.B.F.
, p. 16555 - 16565 (2016)
Tris(8-hydroxyquinolinate) metallic complexes, Mq3, are one of the most important classes of organic semiconductor materials. Herein, the nature of the chemical bond in Mq3 complexes and its implications on their molecular properties were investigated by a combined experimental and computational approach. Various Mq3 complexes, resulting from the alteration of the metal and substitution of the 8-hydroxyquinoline ligand in different positions, were prepared. The mer-/fac-isomerism in Mq3 was explored by FTIR and NMR spectroscopy, evidencing that, irrespective of the substituent, mer- and fac-are the most stable molecular configurations of Al(iii) and In(iii) complexes, respectively. The relative M-ligand bond dissociation energies were evaluated experimentally by electrospray ionization tandem mass spectrometry (ESI-MS-MS), showing a non-monotonous variation along the group (Al > In > Ga). The results reveal a strong covalent character in M-ligand bonding, which allows for through-ligand electron delocalization, and explain the preferred molecular structures of Mq3 complexes as resulting from the interplay between bonding and steric factors. The mer-isomer reduces intraligand repulsions, being preferred for smaller metals, while the fac-isomer is favoured for larger metals where stronger covalent M-ligand bonds can be formed due to more extensive through-ligand conjugation mediated by metal d orbitals.
Solid state preparation of the (8-hydroxyquinolinato)aluminum(III) complex from aluminum isopropoxide and 8-hydroxyquinoline
Saxena
, p. 1747 - 1767 (1999)
A new alternate method is described for the preparation of the (8-hydroxyquinolinato)aluminum(III) complex in the solid state from aluminum isopropoxide. The complex was characterised by IR spectra, elemental analyses and X-ray spectroscopy using a compact X-ray diffraction analyser. The light yellow complex prepared in the solid state has an identical structure with the one prepared by the wet method.
Hot melt reaction preparation of luminescent material 8-hydroxy quinoline aluminum method
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Paragraph 0010-0012, (2017/03/17)
The invention discloses a method for preparing a luminescent material aluminum 8-hydroxyquinolinate through hot melting reaction. Pure aluminum 8-hydroxyquinolinate is directly prepared by using 8-hydroxyquinoline and anhydrous aluminum chloride as reaction raw materials and using a hot melting method. The method concretely comprises the following steps of alternately adding the reaction raw materials, namely 8-hydroxyquinoline and anhydrous aluminum chloride into a reactor according to the molar ratio of 3:1, heating to 80-100 DEG C, and reacting for 2-4h; and after ending the reaction, cooling to the room temperature, and discharging to obtain aluminum 8-hydroxyquinolinate with the purity of 97-99%. The method has the advantages of short process, high product yield, no waste liquid discharge and low production cost and is environmental friendly.
