Hydrogen/Deuterium Isotopic Labeling Study of Enantioselective Hydrogenation of (E)-2-Methyl-2-butenoic Acid over a Cinchonidine-Modified Pd/C Catalyst

2019 ◽  
Vol 92 (10) ◽  
pp. 1737-1742 ◽  
Author(s):  
Takashi Sugimura ◽  
Satoshi Tomatsuri ◽  
Morifumi Fujita ◽  
Yasuaki Okamoto
Keyword(s):  
Isotopic Labeling ◽  
Enantioselective Hydrogenation ◽  
Butenoic Acid ◽  
Hydrogen Deuterium

Cinchonidine doped Pd catalysts in the enantioselective hydrogenation of (E)-2-methyl-2-butenoic acid

2006 ◽  
Vol 246 (1-2) ◽  
pp. 263-267 ◽  
Author(s):  
M. Casagrande ◽  
S. Franceschini ◽  
M. Lenarda ◽  
O. Piccolo ◽  
A. Vaccari
Keyword(s):  
Enantioselective Hydrogenation ◽  
Pd Catalysts ◽  
Butenoic Acid

Pd-based Sol–Gel Catalysts for the Enantioselective Hydrogenation of (E)-2-Methyl-2-Butenoic Acid

2008 ◽  
Vol 125 (3-4) ◽  
pp. 243-249 ◽  
Author(s):  
D. Impalà ◽  
S. Franceschini ◽  
O. Piccolo ◽  
A. Vaccari
Keyword(s):  
Sol Gel ◽  
Enantioselective Hydrogenation ◽  
Butenoic Acid

Liquid-Phase Peak Force Infrared Microscopy

2020 ◽  
Author(s):  
Haomin Wang ◽  
Joseph M. González-Fialkowski ◽  
Wenqian Li ◽  
Yan Yu ◽  
Xiaoji Xu
Keyword(s):  
Liquid Phase ◽  
Spatial Resolution ◽  
Shear Force ◽  
Polymer Surface ◽  
Surface Damage ◽  
Peak Force ◽  
Infrared Microscopy ◽  
Contact Mode ◽  
Force Microscopy ◽  
Hydrogen Deuterium

Atomic force microscopy-infrared microscopy (AFM-IR) provides a route to bypass Abbe’s diffraction limit through photothermal detections of infrared absorption. With the combination of total internal reflection, AFM-IR can operate in the aqueous phase. However, AFM-IR in contact mode suffers from surface damage from the lateral shear force between the tip and sample, and can only achieve 20~25-nm spatial resolution. Here, we develop the liquid-phase peak force infrared (LiPFIR) microscopy that avoids the detrimental shear force and delivers an 8-nm spatial resolution. The non-destructiveness of the LiPFIR microscopy enables <i>in situ</i> chemical measurement of heterogeneous materials and investigations on a range of chemical and physical transformations, including polymer surface reorganization, hydrogen-deuterium isotope exchange, and ethanol-induced denaturation of proteins. We also perform LiPFIR imaging of the budding site of yeast cell wall in the fluid as a demonstration of biological applications. LiPFIR unleashes the potential of in liquid AFM-IR for chemical nanoscopy.

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