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An Integrated Continuous‐Flow Synthesis of a Key .

An Integrated Continuous‐Flow Synthesis of a Key .

Jun 30, 2017 · Experimental Section. General: 1 H NMR spectra were recorded with a Bruker 300 MHz spectrometer. 13 C NMR spectra were recorded with the same instrument at 75 MHz. Chemical shifts (δ) are expressed in ppm downfield from TMS as internal standard. The letters s, d, t, q, and m are used to indicate singlet, doublet, triplet, quadruplet, and .

Covalent organic framework membranes through a mixed .

Covalent organic framework membranes through a mixed .

May 08, 2019 · Covalent organic frameworks (COFs) hold great promise in molecular separations owing to their robust, ordered and tunable porous network structures. Currently, the pore size of .

Harnessing liquid-in-liquid printing and micropatterned .

Harnessing liquid-in-liquid printing and micropatterned .

Mar 06, 2019 · The ability to shape immiscible liquids into prescribed architectures and reconfigure them on-demand is an emerging design paradigm in soft-matter materials chemistry 1,2,3,4,5,6,7,8,9.To trap a .

Resolving the puzzle of single-atom silver dispersion on .

Resolving the puzzle of single-atom silver dispersion on .

Jan 27, 2020 · MAS NMR. 27 Al and 1 H NMR spectra were recorded at 11.7T on a Bruker-Advance III 500 spectrometer equipped with a 4 mm double-resonance probe. The corresponding resonance frequency and magic .

NMR Chemical Shifts of Common Laboratory Solvents as Trace .

NMR Chemical Shifts of Common Laboratory Solvents as Trace .

Hao Ma, Furong Wang, Yinghao Yu, Lefu Wang, and Xuehui Li . Autocatalytic Production of 5-Hydroxymethylfurfural from Fructose-Based Carbohydrates in a Biphasic System and Its Purification. Industrial & Engineering Chemistry Research 2015, 54 (10), 2657-2666.

Methanol to Olefins

Methanol to Olefins

The main isotope employed in the summary by Wang et. al. was 13C. Reactor. The reactions were carried out in a microreactor equipped for in-situ MAS NMR and UV/Vis spectroscopy. The reactants were introduced through an injector and into an annular region packed with catalyst. A diagram of the experimental apparatus is shown below.

Ab Initio Structure Search and in Situ 7Li NMR Studies of .

Ab Initio Structure Search and in Situ 7Li NMR Studies of .

Patel et al. were able to detect soluble polysulfides in the separator using in situ UV–vis spectroscopy. (10) The peak in the UV–vis, corresponding to the polysulfides in the separator, gradually shifts to .

Experimental and DFT studies on the molecular structure .

Experimental and DFT studies on the molecular structure .

May 05, 2020 · In this work, the organic material4-Phenylpiperazine-1-ium dihydrogen phosphate (4PPHP)has been characterized by 13 C and 31 P nuclear magnetic resonance (NMR) spectra, UV–visible and infrared spectroscopy. Structural, electronic, topological and vibrational properties were predicted for this compound by using quantum chemical calculations via the density functional theory.

Preparation of highly active phosphated TiO 2 catalysts .

Preparation of highly active phosphated TiO 2 catalysts .

Results and discussion Sol–gel synthesis of phosphated TiO 2 in a microreactor The microreactor set-up was developed based on the conventional batch process for synthesising phosphated TiO 2 via sol–gel reported by Beltramini et al.

Multinuclear (27Al, 29Si, 47,49Ti) solid-state NMR of .

Multinuclear (27Al, 29Si, 47,49Ti) solid-state NMR of .

Sep 01, 2003 · Multinuclear solid-state NMR spectroscopy, employing 29 Si MAS, 27 Al MAS/3Q-MAS and 47,49 Ti wide-line experiments, has been used for the structural characterization of titanium substituted ultra-stable zeolite Y (Ti-USY). 27 Al MAS experiments show the presence of aluminum in four (Al IV), five (Al V), and six (Al VI) coordination, whereas the multiplicity within Al IV and Al VI is .

Concentration‐discharge relationships during an extreme .

Concentration‐discharge relationships during an extreme .

UV‐vis and fluorescence spectroscopy were used to characterize the spectroscopically active portion of organic matter. UV‐vis absorbance was measured every 1 nm from 200 to 800 nm using an Agilent 8453 Spectrophotometer with a 1 cm path length. . (CP‐MAS) method based on Dria et al . . The distribution of carbon relative to spectral .

Lifeng Wang's research works | University of Michigan, Ann .

Lifeng Wang's research works | University of Michigan, Ann .

Lifeng Wang's 63 research works with 3,484 citations and 4,478 reads, including: Selective Catalytic Reduction of Nitric Oxide with Hydrogen on Supported Pd: Enhancement by Hydrogen Spillover

In situ solid-state NMR for heterogeneous catalysis: a .

In situ solid-state NMR for heterogeneous catalysis: a .

The Hunger group used in situ 1 H and 13 C MAS NMR to investigate the H/D exchange reactions of acetone on HZSM-5, 161 and alkylaromatic hydrocarbons on HY and HZSM-5 zeolites. 162,163 By in situ pulse-flow 1 H MAS NMR coupled with UV/Vis spectroscopy, they observed regioselective H/D exchange at the side-chain methyl group of ethylbenzene .

Siderophore-inspired chelator hijacks uranium from aqueous .

Siderophore-inspired chelator hijacks uranium from aqueous .

Feb 18, 2019 · c δ 13 C CP/MAS solid-state NMR spectra of H 2 BHT polymer and H 2 BHT ligand spun at 15 kHz. . UV-Vis, NMR, X-ray crystallography, . Wang, Z. et al.

Lead(II) Binding to the Chelating Agent d-Penicillamine in .

Lead(II) Binding to the Chelating Agent d-Penicillamine in .

The combination of the results from 1 H NMR, 13 C NMR, 207 Pb NMR, and UV-vis spectroscopic techniques led us to conclude that a bis-thiolate Pb(II)-penicillamine complex with PbS 2 NO .

Macromolecules | Vol 50, No 10

Macromolecules | Vol 50, No 10

Pair your accounts. Export articles to Mendeley. Get article recommendations from ACS based on references in your Mendeley library.

A novel Strategy of Lock-in Effect between Conjugated .

A novel Strategy of Lock-in Effect between Conjugated .

Apr 16, 2020 · Wang, D. D., et al. Preparation of morphology-controlled TiO2 nanocrystals for the excellent photocatalytic activity under simulated solar irradiation. Mater. .

A novel Strategy of Lock-in Effect between Conjugated .

A novel Strategy of Lock-in Effect between Conjugated .

Apr 16, 2020 · Wang, D. D., et al. Preparation of morphology-controlled TiO2 nanocrystals for the excellent photocatalytic activity under simulated solar irradiation. Mater. .

A Plasmonic Mass Spectrometry Approach for Detection of .

A Plasmonic Mass Spectrometry Approach for Detection of .

May 17, 2018 · a Schematic diagrams of the experimental workflow. b Size distribution of SiO 2 and SiO 2 @Ag particles by DLS. c UV–Vis absorption spectra of SiO 2 and SiO 2 @Ag particles. d SEM, and e TEM images of SiO 2 @Ag. f Elemental mappings of SiO 2 @Ag (red for Ag and yellow for Si). g SAED pattern and HRTEM (inset of g) showing the silver crystal .

In situ and ex situ NMR for battery research - IOPscience

In situ and ex situ NMR for battery research - IOPscience

Oct 30, 2018 · A number of ex situ NMR studies employing 7 Li and 1 H NMR have continued to investigate the key uncertainties surrounding this technology to compliment in situ studies such as See et al's attempts to better describe the Li–S phase diagram .

A novel Strategy of Lock-in Effect between Conjugated .

A novel Strategy of Lock-in Effect between Conjugated .

Apr 16, 2020 · Wang, D. D., et al. Preparation of morphology-controlled TiO2 nanocrystals for the excellent photocatalytic activity under simulated solar irradiation. Mater. Res. Bull. 38-44 (2017). .

Preparation of highly active phosphated TiO 2 catalysts .

Preparation of highly active phosphated TiO 2 catalysts .

Results and discussion Sol–gel synthesis of phosphated TiO 2 in a microreactor The microreactor set-up was developed based on the conventional batch process for synthesising phosphated TiO 2 via sol–gel reported by Beltramini et al. 29–31 We thought the three reaction steps, i.e., i) hydrolysis and sol formation, ii) phosphatisation, and iii) gelation–precipitation, .

Modeling Solvation in Supercritical CO2 - Ingrosso - 2017 .

Modeling Solvation in Supercritical CO2 - Ingrosso - 2017 .

Jul 18, 2017 · They showed a strong correlation between the density dependence of solvent‐induced shifts on the electronic spectrum of the solute and the behavior of effective local densities. 71 A sequential molecular dynamics (MD) and quantum mechanics approach was used by Millot et al. to compute the UV/Vis .

Siderophore-inspired chelator hijacks uranium from aqueous .

Siderophore-inspired chelator hijacks uranium from aqueous .

Feb 18, 2019 · c δ 13 C CP/MAS solid-state NMR spectra of H 2 BHT polymer and H 2 BHT ligand spun at 15 kHz. . UV-Vis, NMR, X-ray crystallography, . Wang, Z. et al. Adsorption of uranium(VI) to manganese .

A Wide Band Gap Polymer with a Deep Highest Occupied .

A Wide Band Gap Polymer with a Deep Highest Occupied .

To simultaneously achieve low photon energy loss (Eloss) and broad spectral response, the molecular design of the wide band gap (WBG) donor polymer with a deep HOMO level is of critical importance in fullerene-free polymer solar cells (PSCs). Herein, we developed a new benzodithiophene unit, i.e., DTBDT-EF, and conducted systematic investigations on a WBG .

751 questions with answers in SPECTROSCOPY | Scientific method

751 questions with answers in SPECTROSCOPY | Scientific method

Jul 19, 2020 · Many of the papers revealed that silver nanoparticles obtained between 400-500 nm while performing with UV-Vis spectroscopy. but i got two peaks. one is in between 200-300nm and other is .

Mechanistic investigations of the methanol-to-olefin (MTO .

Mechanistic investigations of the methanol-to-olefin (MTO .

Mar 30, 2006 · The CF MAS NMR-UV/vis probe is still based on the injection technique depicted in Refs. and . Inside the 7 mm CF MAS NMR-UV/vis probe shown in Fig. 3, a glass fiber was fixed to the bottom of the stator. The MAS NMR rotor was modified at the bottom with a quartz window.

Thermomyces lanuginosus lipase-catalyzed synthesis of .

Thermomyces lanuginosus lipase-catalyzed synthesis of .

Jan 11, 2016 · Enzymatic catalysis is considered to be among the most environmental friendly processes for the synthesis of fine chemicals. In this study, lipase from Thermomyces lanuginosus (Lecitase Ultra™) was used to catalyze the synthesis of flavor esters, i.e., methyl butanoate and methyl benzoate by esterification of the acids with methanol in a microfluidic system.

JoVE | Peer Reviewed Scientific Video Journal - Methods .

JoVE | Peer Reviewed Scientific Video Journal - Methods .

JoVE publishes peer-reviewed scientific video protocols to accelerate biological, medical, chemical and physical research. Watch our scientific video articles.

Thermomyces lanuginosus lipase-catalyzed synthesis of .

Thermomyces lanuginosus lipase-catalyzed synthesis of .

Enzymatic catalysis is considered to be among the most environmental friendly processes for the synthesis of fine chemicals. In this study, lipase from Thermomyces lanuginosus (Lecitase Ultra™) was used to catalyze the synthesis of flavor esters, i.e., methyl butanoate and methyl benzoate by esterification of the acids with methanol in a microfluidic system.