Guerbet Alcohols: From Processes under Harsh Conditions to Synthesis at Room Temperature under Ambient Pressure

ChemCatChem ◽  
2016 ◽  
Vol 8 (5) ◽  
pp. 895-899 ◽  
Author(s):  
Marc Biermann ◽  
Hendrik Gruß ◽  
Werner Hummel ◽  
Harald Gröger
Keyword(s):  
Room Temperature ◽  
Ambient Pressure ◽  
Guerbet Alcohols ◽  
Harsh Conditions

Carbon Capture Performance of Amino-Modified MIL-101 at Room Temperature

2013 ◽  
Vol 395-396 ◽  
pp. 637-640
Author(s):  
Yi Yang ◽  
Zheng Ping Wang ◽  
Ling Meng ◽  
Lian Jun Wang
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Pore Structure ◽  
Carbon Capture ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Before And After

MIL-101, a metal-organic framework material, was synthesized by the high-temperature hydrothermal method. Triethylenetetramine (TETA) modification enabled the effective grafting of an amino group onto the surface of the materials and their pore structure. The crystal structure, micromorphology, specific surface area, and pore structure of the samples before and after modification were analyzed with an X-ray diffractometer, scanning electron microscope, specific surface and aperture tester, and infrared spectrometer. The carbon dioxide adsorption properties of the samples were determined by a thermal analyzer before and after TETA modification. Results show that moderate amino modification can effectively improve the microporous structure of MIL-101 and its carbon dioxide adsorption properties. After modification, the capacity of MIL-101 to adsorb carbon dioxide decreased only by 0.61 wt%, and a high adsorption capacity of 9.45 wt% was maintained after six cycles of adsorption testing at room temperature and ambient pressure.

scholarly journals Cu(I)/Ionic Liquids Promote the Conversion of Carbon Dioxide into Oxazolidinones at Room Temperature

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1241 ◽  
Author(s):  
Jikuan Qiu ◽  
Yue Zhao ◽  
Yuling Zhao ◽  
Huiyong Wang ◽  
Zhiyong Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Noble Metal ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Sustainable Chemistry ◽  
One Pot ◽  
Propargylic Alcohols ◽  
Noble Metal Catalysts ◽  
Three Component Reaction ◽  
Carbon Dioxide Co2

Recently, the efficient chemical fixation of carbon dioxide (CO2) into high value chemicals without using noble metal catalysts has become extremely appealing from the viewpoint of sustainable chemistry. In this work, a one-pot three component reaction of propargylic alcohols, anines and CO2 that can proceed in an atom economy and environmentally benign manner by combination of CuI and tetrabutylphosphonium imidazol ([P4444][Im]) as a catalyst was described. Catalysis studies indicate that this catalytic system is an effective catalyst for the conversion of CO2 into oxazolidinones at room temperature and ambient pressure without any solvent. The results provide a useful way to design novel noble metal-free catalyst systems for the transformation of CO2 into other valuable compounds.

scholarly journals High-Pressure Structural Behavior and Equation of State of Kagome Staircase Compound, Ni3V2O8

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 910
Author(s):  
Daniel Diaz-Anichtchenko ◽  
Robin Turnbull ◽  
Enrico Bandiello ◽  
Simone Anzellini ◽  
Daniel Errandonea
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Density Functional ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Density Functional Theory Calculations ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
A Chain

We report on high-pressure synchrotron X-ray diffraction measurements on Ni3V2O8 at room-temperature up to 23 GPa. According to this study, the ambient-pressure orthorhombic structure remains stable up to the highest pressure reached in the experiments. We have also obtained the pressure dependence of the unit-cell parameters, which reveals an anisotropic compression behavior. In addition, a room-temperature pressure–volume third-order Birch–Murnaghan equation of state has been obtained with parameters: V0 = 555.7(2) Å3, K0 = 139(3) GPa, and K0′ = 4.4(3). According to this result, Ni3V2O8 is the least compressible kagome-type vanadate. The changes of the crystal structure under compression have been related to the presence of a chain of edge-sharing NiO6 octahedral units forming kagome staircases interconnected by VO4 rigid tetrahedral units. The reported results are discussed in comparison with high-pressure X-ray diffraction results from isostructural Zn3V2O8 and density-functional theory calculations on several isostructural vanadates.

Selective Hydrogenation of Phenol Catalyzed by Palladium on High-Surface-Area Ceria at Room Temperature and Ambient Pressure

ACS Catalysis ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2051-2061 ◽  
Author(s):  
Nicholas C. Nelson ◽  
J. Sebastián Manzano ◽  
Aaron D. Sadow ◽  
Steven H. Overbury ◽  
Igor I. Slowing
Keyword(s):  
Surface Area ◽  
Selective Hydrogenation ◽  
Room Temperature ◽  
Ambient Pressure ◽  
High Surface ◽  
High Surface Area

Highly Conductive and Optically Transparent Polycrystalline Iridium Oxide Thin Films Grown by Reactive Pulsed Laser Deposition

1997 ◽  
Vol 472 ◽  
Author(s):  
M.A. El Khakani ◽  
M. Chaker
Keyword(s):  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Deposition Temperature ◽  
Room Temperature ◽  
Optical Transmission ◽  
Ambient Pressure ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Structure Morphology ◽  
Quartz Substrates

ABSTRACTReactive pulsed laser deposition has been used to deposit IrO2 thin films on both SiO2 and fused quartz substrates, by ablating a metal iridium target in oxygen atmosphere. At a KrF laser intensity of about 1.7 × 109 W/cm2, IrO2 films were deposited at substrate deposition temperatures ranging from room-temperature to 700 °C under an optimum oxygen ambient pressure of 200 mTorr. The structure, morphology, electrical resistivity and optical transmission of the deposited films were characterized as a function of their deposition temperature (Td). High quality IrO2 films are obtained in the 400–600 °C deposition temperature range. They are polycrystalline with preferred orientations, depending on the substrate, and show a dense granular morphology. At a Td as low as 400 °C, highly conductive IrO2 films with room-temperature resistivities as low as (42±6) μΩ cm are obtained. Over the 300–600 °C Td range, the IrO2 films were found to exhibit a maximum optical transmission at 450 °C (∼ 45 % at 500 nm for 80 nm-thick films).

Quantitative chemocatalytic production of lactic acid from glucose under anaerobic conditions at room temperature

2017 ◽  
Vol 19 (1) ◽  
pp. 76-81 ◽  
Author(s):  
Luyang Li ◽  
Feng Shen ◽  
Richard L. Smith ◽  
Xinhua Qi
Keyword(s):  
Lactic Acid ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Anaerobic Conditions ◽  
Highly Efficient

An extraordinarily simple and highly-efficient chemocatalytic system for production of lactic acid (95.4% yield) from glucose at room temperature and ambient pressure is reported.

scholarly journals Time-dependent Local and Average Structural Evolution of δ-phase 239Pu-Ga Alloys

MRS Advances ◽  
2016 ◽  
Vol 1 (44) ◽  
pp. 3019-3025 ◽  
Author(s):  
Alice I. Smith ◽  
Katharine L. Page ◽  
Joan E. Siewenie ◽  
Adrian S. Losko ◽  
Sven C. Vogel ◽  
...  
Keyword(s):  
Room Temperature ◽  
Structural Integrity ◽  
Ambient Pressure ◽  
Structural Evolution ◽  
Time Dependent ◽  
Pressure Chemical ◽  
Δ Phase ◽  
Scattering Study ◽  
Plutonium Metal ◽  
Neutron Total Scattering

ABSTRACT Plutonium metal is a very unusual element, exhibiting six allotropes at ambient pressure, between room temperature and its melting point, a complicated phase diagram, and a complex electronic structure. Many phases of plutonium metal are unstable with changes in temperature, pressure, chemical additions, or time. This strongly affects structure and properties, and becomes of high importance, particularly when considering effects on structural integrity over long periods of time [1]. This paper presents a time-dependent neutron total scattering study of the local and average structure of naturally aging δ-phase 239Pu-Ga alloys, together with preliminary results on neutron tomography characterization.

A Solid-State Effect Responsible for an Organic Quintet State at Room Temperature and Ambient Pressure

2015 ◽  
Vol 27 (10) ◽  
pp. 1718-1723 ◽  
Author(s):  
Yonghao Zheng ◽  
Mao-sheng Miao ◽  
Géraldine Dantelle ◽  
Nancy D. Eisenmenger ◽  
Guang Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Quintet State ◽  
State Effect
Sign in / Sign up

Export Citation Format

Share Document