Acidic nature of chemisorption sites on silica-alumina and alumina catalysts. Characterization by UV spectra of adsorbed p-nitroaniline.
スポンサーリンク
概要
- 論文の詳細を見る
Chemisorbed <I>p</I>-nitroaniline (PNA) gives two bands at 245 and 445 nm on silica-alumina and one band at 450 nm on alumina. The present paper deals with the nature of these chemisobed species and of the chemisorption sites. Kinetic studies of PNA chemisorption onto silica-alumina from cyclohexane solution revealed that the chemisorbed species responsible for the 245 nm band was formed with an activation energy by 0.9 kcal/mol smaller than that responsible for the 445 nm band. The two bands on silica-alumina are due conclusively to two different chemisorbed species. Comparison among UV absorption spectra of PNA in various solutions and on various solid surfaces led to the conclusion that the 245 nm band is ascribable to PNA chemisorbed on Bronsted acid sites and the 445 and 450 nm bands to PNA chemisorbed on Lewis acid sites (<I>i.e.</I> surface Al<SUP>3+</SUP> ions).
- 公益社団法人 日本化学会の論文
著者
-
Yoneda Yukio
Department Of Molecular Pharmacology Kanazawa University Faculty Of Pharmaceutical Sciences
-
Mizuno Koichi
Department Of Biol. Graduate School Of Sci. Osaka Univ.
-
Take Jun-ichiro
Department of Synthetic Chemistry, Faculty of Engineering, The University of Tokyo
-
Mizuno Koichi
Department of Synthetic Chemistry, Faculty of Engineering, The University of Tokyo
関連論文
- CHARACTERIZATION OF Na^+-DEPENDENT BINDING OF [^3H] GLUTAMATE IN CEREBRAL SYNAPTIC MEMBRANES
- Gene Transcription Through Myc Family Members in Eukaryotic Cells
- COUPLING MECHANISMS OF GLUTAMATE RECEPTOR TO ANION CHANNEL IN SYNAPTIC MEMBRANES
- Concentration gradient of oxalate from cortex to papilla in rat kidney
- Intraoperative insertion torque of lumbar pedicle screw and postoperative radiographic evaluation : short-term observation
- Possible Involvement of Membrane Phospholipids in Inhibition by Ferrous Ions of [^3H]MK-801 Binding to the Native N-Methyl-D-Aspartate Channel in Rat Brain
- Preventive Effect of Lipid-lowering Therapy before Percutaneous Coronary Intervention on Coronary Restenosis in Patients with Acute Coronary Syndrome(Acute Coronary Syndrome, Basic/Clinical 3 (IHD), The 69th Annual Scientific Meeting of the Japanese Circu
- PE-018 Radiofrequency Abliation of Right Ventricular Outflow Tachycardia: Difference of Elecrogram Caracteristics between Suprapulmonalic Valce and Right Ventricular Outflow Tract(Poster Session (English))
- IgE Production after Four Routes of Injections of Japanese Cedar Pollen Allergen without Adjuvant : Crucial Role of Resident Cells at Intraperitoneal or Intranasal Injection Site in the Production of Specific IgE toward the Allergen
- Differential Susceptibility of Cells Expressing Allogeneic MHC or Viral Antigen to Killing by Antigen-Specific CTL
- Leukocyte Integrin - dependent and Antibody - Independent Cytotoxicity of Macrophage against Allografts
- Extracellular Components Implicated in the Stationary Organization of the Actin Cytoskeleton in Mesophyll Cells of Vallisneria
- Transcription Factors and Drugs in the Brain
- [^3H] GLUTAMATE BINDING IN MEMBRANOUS PREPARATIONS FROM RAT ADRENAL
- Non-invasive estimation of intraurethral pressure profile from uroflowmetric curve
- MICROASSAY METHODS FOR TAURINE AND CYSTEINE SULFINATE DECARBOXYLASE ACTIVITY
- Effects of Propyzamide on Tobacco Cell Microtubules In Vivo and In Vitro
- Two types of allograft-induced cytotoxic macrophage, one against allografts and the other against syngeneic or allogeneic tumor cells
- Sucrose Synthase is an Integral Component of the Cellulose Synthesis Machinery
- Vessel element formation in cultured carrot-root phloem slices
- Artificial Orchestration of Functional NMDAR Channels in HEK293 Cells
- Stereochemical studies of elimination reactions of 2-bromobutane and 2,3-dibromobutane over bivalent-ion exchanged silica gels.
- Stereochemical studies of elimination reactions of 2-bromobutane and 2,3-dibromobutane over alkali-ion exchanged silica gels.
- EFFECT OF TAURINE ON RESPONSES TO NORADRENALINE, ACETYLCHOLINE AND OUABAIN IN ISOLATED AURICLES FROM DIGITALIZED GUINEA PIGS
- A PROTEIN THAT ORGANIZE MICROTUBULES FROM HIGHER PLANT NUCLE1
- Difficulty of Establishing Adsorption Equilibrium in n-Butylamine Titration of Solid Acid Surfaces
- Measurements of Acid-strength Distribution beyond H0=−8.2 of Silica-Alumina Catalysts by UV-Spectrophotometric n-Butylamine Titration Method
- An infrared study of acid sites on silica-alumina catalysts poisoned with sodium hydroxide.
- Catalysis by heteropoly compounds. III. The structure and properties of 12-heteropolyacids of molybdenum and tungsten (H3PMo12-xWxO40) and their salts pertinent to heterogeneous catalysis.
- Catalytic properties of iron oxide. III. Oxidative dehydrogenation of butenes over iron oxide catalysts.
- Nature of catalytically active sites over solid acids. I. Selective poisoning of Lewis acid sites on silica-alumina with pyridine and its application to olefin polymerization.
- The dehydrogenation of cyclohexane by the use of a porous-glass reactor.
- A computer program package for the analysis, creation, and estimation of generalized reactions - GRACE. I. Generation of elementary reaction network in radical reactions - A/GRACE(I).
- A kinetic study of the simultaneous dealkylation and disproportionation of cumene over silica-alumina.
- Catalytic properties of iron oxides. II. Isotopic exchange of oxygen, oxidation of carbon monoxide, and reduction-oxidation mechanism.
- Acidic nature of chemisorption sites on silica-alumina and alumina catalysts. Characterization by UV spectra of adsorbed p-nitroaniline.
- Analysis of thermal desorption curves for heterogeneous surfaces. I. A linear variation of the activation energy of desorption.
- Stereospecific Dehydrobromination of dl- and meso-2,3-Dibromobutanes over Solid Catalysts
- The Catalytic Activity and Selectivity of Acidic Metal Salt Catalysts for n-Butene Isomerization
- Nature of catalytically active sites over solid acids. II. Relationships between acidic properties of silica-alumina and its catalytic activities for olefin polymerization.
- Catalyst Isotope Effect in n-Butene Isomerization Catalyzed by Metal Sulfates
- An estimation of the thermodynamic properties of organic compounds in the ideal gas state. I. Acyclic compounds and cyclic compounds with a ring of cyclopentane, cyclohexane, benzene, or naphthalene.
- Linear free energy relationships in heterogeneous catalysis. XIII. The dehydration of aliphatic alcohols over silica-alumina.