Synthesis, Structural Elucidation, and Application of a Pyrazolylpyridine–Molybdenum Oxide Composite as a Heterogeneous Catalyst for Olefin Epoxidation

2012 ◽  
Vol 51 (15) ◽  
pp. 8629-8635 ◽  
Author(s):  
Sónia Figueiredo ◽  
Ana C. Gomes ◽  
Patrícia Neves ◽  
Tatiana R. Amarante ◽  
Filipe A. Almeida Paz ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Molybdenum Oxide ◽  
Structural Elucidation ◽  
Olefin Epoxidation ◽  
Oxide Composite

scholarly journals A 5-(2-Pyridyl)tetrazolate Complex of Molybdenum(VI), Its Structure, and Transformation to a Molybdenum Oxide-Based Hybrid Heterogeneous Catalyst for the Epoxidation of Olefins

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1407
Author(s):  
Martinique S. Nunes ◽  
Diana M. Gomes ◽  
Ana C. Gomes ◽  
Patrícia Neves ◽  
Ricardo F. Mendes ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Molybdenum Oxide ◽  
Heterogeneous Catalysts ◽  
Methyl Esters ◽  
Practical Interest ◽  
Magic Angle Spinning ◽  
Homogeneous Catalyst ◽  
Magic Angle ◽  
Olefin Epoxidation ◽  
Consecutive Reaction

There is a considerable practical interest in discovering new ways to obtain organomolybdenum heterogeneous catalysts for olefin epoxidation that are easier to recover and reuse and display enhanced productivity. In this study, the complex salt (H2pytz)[MoO2Cl2(pytz)] (1) (Hpytz = 5-(2-pyridyl)tetrazole) has been prepared, structurally characterized, and employed as a precursor for the hydrolysis-based synthesis of a microcrystalline molybdenum oxide/organic hybrid material formulated as [MoO3(Hpytz)] (2). In addition to single-crystal X-ray diffraction (for 1), compounds 1 and 2 were characterized by FT-IR and Raman spectroscopies, solid-state 13C{1H} cross-polarization (CP) magic-angle spinning (MAS) NMR, and scanning electron microscopy (SEM). Compounds 1 and 2 were evaluated as olefin epoxidation catalysts using the model reaction of cis-cyclooctene (Cy8) with tert-butyl hydroperoxide (TBHP), at 70 °C, which gave 100% epoxide selectivity up to 100% conversion. While 1 behaved as a homogeneous catalyst, hybrid 2 behaved as a heterogeneous catalyst and could be recovered for recycling without showing structural degradation or loss of catalytic performance over consecutive reaction cycles. The substrate scope was broadened to monoterpene DL-limonene (Lim) and biobased unsaturated fatty acid methyl esters, methyl oleate (MeOle), and methyl linoleate (MeLin), which gave predominantly epoxide products.

Synthesis, Structural Elucidation, and Catalytic Properties in Olefin Epoxidation of the Polymeric Hybrid Material [Mo3O9(2-[3(5)-Pyrazolyl]pyridine)]n

2014 ◽  
Vol 53 (5) ◽  
pp. 2652-2665 ◽  
Author(s):  
Tatiana R. Amarante ◽  
Patrícia Neves ◽  
Ana C. Gomes ◽  
Mariela M. Nolasco ◽  
Paulo Ribeiro-Claro ◽  
...  
Keyword(s):  
Hybrid Material ◽  
Catalytic Properties ◽  
Structural Elucidation ◽  
Olefin Epoxidation

P-94: Improvement in Hole Injection into Quantum-dot Light-emitting Layer Using Organic Hole-transporting Material/Molybdenum Oxide Composite

2016 ◽  
Vol 47 (1) ◽  
pp. 1476-1479 ◽  
Author(s):  
Tomoya Hirose ◽  
Takao Hamada ◽  
Toshiaki Tsunoi ◽  
Eriko Aoyama ◽  
Ayumi Ishigaki ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Molybdenum Oxide ◽  
Hole Injection ◽  
Light Emitting ◽  
Oxide Composite ◽  
Hole Transporting ◽  
Hole Transporting Material

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)–molybdenum oxide composite films as hole conductors for efficient planar perovskite solar cells

2016 ◽  
Vol 4 (25) ◽  
pp. 9958-9966 ◽  
Author(s):  
Yurong Jiang ◽  
Chen Li ◽  
Hairui Liu ◽  
Ruiping Qin ◽  
Heng Ma
Keyword(s):  
Solar Cells ◽  
Molybdenum Oxide ◽  
Composite Films ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Solution Processed ◽  
Oxide Composite ◽  
Hole Transport Layers

PEDOT:PSS–molybdenum oxide (MoOx) composite films are used as hole transport layers in planar perovskite solar cells (PSCs) by simply incorporating solution-processed MoOx powders into a PEDOT:PSS solution.

Preparation and characterization of a novel spherical cellulose–copper(II) oxide composite particles: as a heterogeneous catalyst for the click reaction

2019 ◽  
Vol 24 (1) ◽  
pp. 201-209 ◽  
Author(s):  
Seyedeh Fazileh Hamzavi ◽  
Sanaz Gerivani ◽  
Simin Saeedi ◽  
Kobra Naghdipari ◽  
Gholamhossein Shahverdizadeh
Keyword(s):  
Heterogeneous Catalyst ◽  
Click Reaction ◽  
Composite Particles ◽  
Oxide Composite

One-pot synthesis of molybdenum oxide nanoparticles encapsulated in hollow silica spheres: an efficient and reusable catalyst for epoxidation of olefins

2017 ◽  
Vol 5 (35) ◽  
pp. 18518-18526 ◽  
Author(s):  
Yasutaka Kuwahara ◽  
Naoyuki Furuichi ◽  
Hiroyuki Seki ◽  
Hiromi Yamashita
Keyword(s):  
Molybdenum Oxide ◽  
Oxide Nanoparticles ◽  
Reusable Catalyst ◽  
Silica Spheres ◽  
Olefin Epoxidation ◽  
One Pot ◽  
Hollow Silica ◽  
Hollow Silica Spheres ◽  
Molybdenum Oxide Nanoparticles ◽  
Epoxidation Of Olefins

A facile one-pot method was developed to synthesize hollow silica spheres encapsulating MoOx nanoparticles, which could act as an efficient and reusable catalyst in olefin epoxidation.

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