529-33-9Relevant academic research and scientific papers
Synergistic effects of encapsulated phthalocyanine complexes in MIL-101 for the selective aerobic oxidation of tetralin
Kockrick, Emanuel,Lescouet, Tristan,Kudrik, Evgeny V.,Sorokin, Alexander B.,Farrusseng, David
, p. 1562 - 1564 (2011)
Metal phthalocyanine complexes encapsulated in MIL-101, and used as "ship-in-a-bottle" catalysts, show outstanding TONs in the aerobic oxidation of tetralin.
Synthesis, characterization of (R)-2,2′-diamino-1,1′-binaphthyl mono-sulfonamide and its ruthenium complex and evaluation of the catalytic properties in transfer hydrogenation reactions
Cai, Lisheng,Han, Ying,Mahmoud, Hussein,Segal, Brent M.
, p. 77 - 86 (1998)
(R)-2-amino-2′-(8-quinolinesulfonyl amino)-1,1′-binaphthyl is synthesized. Its ruthenium complex is shown to be an asymmetric catalyst for transfer hydrogenation reactions in high chemical yield and modest enantioselectivity. Single crystal diffraction studies of both the ligand and the ruthenium complex show strong π-stacking interactions between the quinoline ring and one of the naphthyl groups. The relationship between the structure and catalytic reactivity is also discussed.
Aerobic oxidation of fluorene to fluorenone over Co-Cu bimetal oxides
Luo, Jing,Xuan, Keng,Wang, Yanxia,Li, Feng,Wang, Feng,Pu, Yanfeng,Li, Lei,Zhao, Ning,Xiao, Fukui
, p. 8428 - 8438 (2019)
Oxidation of sp3 C-H bonds has attracted increasing attention, and the aim of our work is to prepare catalysts for oxidation of sp3 C-H bonds using O2 without an initiator. In this paper, a series of Co-Cu bimetal oxides with different Co/Cu ratios were synthesized by a sol-gel method and tested for catalytic oxidation of fluorene to fluorenone using molecular oxygen as an oxidant in the absence of a radical initiator. The best catalytic performance was achieved over the Co0.7Cu0.3 catalyst and the catalysts could be reused without significant loss of the catalytic activity. The characterization results indicated that some Cu entered the Co3O4 lattices, leading to more high-valence metal ion sites (Co3+ and Cu2+) and surface oxygen species (O2-, O22-, and O-) as well as promoted redox ability, which all enhanced the catalytic activity. In addition, the catalysts were also efficient for the oxidation of other benzylic C-H containing aromatic hydrocarbons such as tetralin, indan, diphenylmethane and ethylbenzene.
Coordination frameworks assembled from CuII ions and H2-1,3-bdpb ligands: X-ray and magneto structural investigations, and catalytic activity in the aerobic oxidation of tetralin
Grzywa, MacIej,Gessner, Christof,Bredenk?tter, Bj?rn,Denysenko, Dmytro,Van Leusen, Jan,K?gerler, Paul,Klemm, Elias,Volkmer, Dirk
, p. 16846 - 16856 (2014)
The syntheses and crystal structures of H2-1,3-bdpb·MeOH, [CuII2(1,3-bdpb)(OCH3)2] (CFA-5) and [CuICl(H2-1,3-bdpb)] (H2-1,3-bdpb = 1,3-bis(3,5-dimethyl-1H-pyrazol-4-yl)benzene) are described. The copper(ii) containing metal-organic framework (termed Coordination Framework Augsburg University-5, CFA-5) crystallizes in the trigonal crystal system, within the space group R3 (no. 148) and the unit cell parameters are as follows: a = 26.839(3), c = 15.8317(16) ?, V = 9876.2(19) ?3. CFA-5 features a two-fold interpenetrated 3-D microporous framework structure of cross-linked wheel-shaped {CuII(pz)(OMe)}12 fundamental building units, each containing twelve copper(ii) ions, μ2-bridging MeO- groups and pyrazolate (pz-) ligands. Replacing copper(ii) acetate by copper(ii) chloride in the synthesis leads to compound [CuICl(H2-1,3-bdpb)], which crystallizes in the orthorhombic crystal system, within the space group Pnma (no. 62) and the unit cell parameters are as follows: a = 6.1784(8), b = 6.1784(8), c = 6.1784(8) ?, V = 1583.8(4) ?3. In contrast to the former compound, CuCl(H2-1,3-bdpb) is a non-porous compound consisting of CuI-Cl zigzag chains expanding in the direction [100] and H2-1,3-bdpb ligands. CFA-5 is characterized by elemental and thermogravimetric analyses, variable temperature powder X-ray diffraction and IR-spectroscopy; and its porosity and magnetic properties are described in detail. CFA-5 shows a promising catalytic activity in the heterogeneously catalyzed aerobic oxidation of tetralin, which is compared with other catalytically active metal-organic frameworks.
Hydrocarbon oxidation catalyzed by a cheap nonheme imine-based iron(II) complex
Olivo, Giorgio,Arancio, Giorgio,Mandolini, Luigi,Lanzalunga, Osvaldo,Di Stefano, Stefano
, p. 2900 - 2903 (2014)
Nonheme iron complex 1 is easily obtained by one-pot assembly of cheap and commercially available starting materials. This complex effectively catalyzes the oxidation of a number of non-activated C-H bonds by H2O 2 with high turnover numbers and good selectivity. the Partner Organisations 2014.
Meso-Substitution Activates Oxoiron(IV) Porphyrin π-Cation Radical Complex More Than Pyrrole-β-Substitution for Atom Transfer Reaction
Fukui, Nami,Ueno, Kanako,Hada, Masahiko,Fujii, Hiroshi
, p. 3207 - 3217 (2021)
There have been two known categories of porphyrins: a meso-substituted porphyrin like meso-tetramesitylporphyrin (TMP) and a pyrrole-β-substituted porphyrin like native porphyrins and 2,7,12,17-tetramethyl-3,8,13,18-tetramesitylporphyrin (TMTMP). To reveal the chemical and biological function of native hemes, we compare the reactivity of the oxoiron(IV) porphyrin π-cation radical complex (Compound I) of TMP (TMP-I) with that of TMTMP (TMTMP-I) for epoxidation, hydrogen abstraction, hydroxylation, sulfoxidation, and demethylation reactions. Kinetic analysis of these reactions indicated that TMP-I is much more reactive than TMTMP-I when the substrate is not sterically bulky. However, as the substrate is sterically bulkier, the difference of the reactivity between TMP-I and TMTMP-I becomes smaller, and the reactivity of TMP-I is comparable to that of TMTMP-I for a sterically hindered substrate. Since the redox potential of TMP-I is almost the same as that of TMTMP-I, we conclude that TMP-I is intrinsically more reactive than TMTMP-I for these atom transfer reactions, but the steric effect of TMP-I is stronger than that of TMTMP-I. This is contrary to the previous result for the single electron transfer reaction: TMTMP-I is faster than TMP-I. DFT calculations indicate that the orbital energies of the Fe=O moiety for TMTMP-I are higher than those for TMP-I. The difference in steric effect between TMP-I and TMTMP-I is explained by the distance from the mesityl group to the oxo ligand of Compound I. Significance of the pyrrole-β-substituted structure of the hemes in native enzymes is also discussed on the basis of this study.
Ionic liquid templated preparation of carbon aerogels based on resorcinol-formaldehyde: Properties and catalytic performance
Yang, Huimin,Cui, Xinjiang,Deng, Youquan,Shi, Feng
, p. 21852 - 21856,5 (2012)
A series of carbon aerogels were prepared with or without using ionic liquids as templates. By varying the structures and contents of ionic liquids, carbon aerogels with different pore size distributions could be obtained. The effect of the ionic liquids on the properties of the final carbon aerogels was explored and the catalytic performance of the carbon aerogels in the selective oxidation of tetralin was studied.
Autoxidation of Tetralin in Water catalysed by Cobalt(II)-Pyridine Complexes bound to Polymer Colloids
Chandran, Rama S.,Ford, Warren T.
, p. 104 - 105 (1988)
Cobalt(II)-pyridine complexes bound to 60 nm diameter latex copolymers of styrene, divinylbenzene, and either acrylic or methacrylic acid catalayse autoxidation of tetralin in water faster than cobalt(II)-pyridine complexes in aqueous solution or cobalt acetate in acetic acid.
Selective Decomposition of Tetralin Hydroperoxide Catalysed by Quaternary Ammonium Salts
Napadensky, Eduardo,Sasson, Yoel
, p. 65 - 66 (1991)
Tetralin hydroperoxide decomposes to 1-tetralone via a hydrogen bond complex with quaternary ammonium salt catalysts.
Identification of Novel Unspecific Peroxygenase Chimeras and Unusual YfeX Axial Heme Ligand by a Versatile High-Throughput GC-MS Approach
Knorrscheidt, Anja,Püllmann, Pascal,Schell, Eugen,Homann, Dominik,Freier, Erik,Weissenborn, Martin J.
, p. 4788 - 4795 (2020)
Catalyst discovery and development requires the screening of large reaction sets necessitating analytic methods with the potential for high-throughput screening. These techniques often suffer from substrate dependency or the requirement of expert knowledge. Chromatographic techniques (GC/LC) can overcome these limitations but are generally hampered by long analysis time or the need for special equipment. The herein developed multiple injections in a single experimental run (MISER) GC-MS technique allows a substrate independent 96-well microtiter plate analysis within 60 min. This method can be applied to any laboratory equipped with a standard GC-MS. With this concept novel, unspecific peroxygenase (UPO) chimeras, could be identified, consisting of subdomains from three different fungal UPO genes. The GC-technique was additionally applied to evaluate an YfeX library in an E. coli whole-cell system for the carbene-transfer reaction on indole, which revealed the thus far unknown axial heme ligand tryptophan.
