Flexible high-resolution broadband sum-frequency generation vibrational spectroscopy for intrinsic spectral line widths

2019 ◽  
Vol 150 (7) ◽  
pp. 074702 ◽  
Author(s):  
Ruidan Zhang ◽  
Xingxing Peng ◽  
Zhirun Jiao ◽  
Ting Luo ◽  
Chuanyao Zhou ◽  
...  
Keyword(s):  
High Resolution ◽  
Spectral Line ◽  
Vibrational Spectroscopy ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Line Widths ◽  
Frequency Generation

scholarly journals N–H Chirality in Folded Peptide LK7β is Governed by the Cα–H Chirality

2019 ◽  
Author(s):  
Xiaohua Hu ◽  
Li Fu ◽  
jian hou ◽  
yuening zhang ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Resolution ◽  
Origin Of Life ◽  
Vibrational Spectroscopy ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
The Origin Of Life ◽  
Frequency Generation

Recent chiral sum-frequency generation vibrational spectroscopy (cSFG-VS) measurements revealed that the two N-H stretching modes in the 3000-3500 cm-1 range in folded protein and peptide exhibit chiral characteristics. Here we report the first phase-resolved sub-wavenumber high-resolution broadband SFG-VS (HR-BB-SFG-VS) measurement of the LK7β peptide. The results show that this chiral N-H band consists of four, instead of two, distinctive peaks, and they are with two groups of opposite spectral phases. Moreover, the phases of these N-H peaks completely flip from the L-LK7β to the D-LK7β peptide, suggesting that the chirality of the N-H in the folded LK7β peptide is completely governed by the chirality of the Cα–H of the amino acids. This discovery provides clue on why proteins in nature are composed of α-amino acids rather than β- or γ-amino acids, and may help us understand the question on the origin of life.

scholarly journals N–H Chirality in Folded Peptide LK7β is Governed by the Cα–H Chirality

2019 ◽  
Author(s):  
Xiaohua Hu ◽  
Li Fu ◽  
jian hou ◽  
yuening zhang ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Resolution ◽  
Origin Of Life ◽  
Vibrational Spectroscopy ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
The Origin Of Life ◽  
Frequency Generation

Recent chiral sum-frequency generation vibrational spectroscopy (cSFG-VS) measurements revealed that the two N-H stretching modes in the 3000-3500 cm-1 range in folded protein and peptide exhibit chiral characteristics. Here we report the first phase-resolved sub-wavenumber high-resolution broadband SFG-VS (HR-BB-SFG-VS) measurement of the LK7β peptide. The results show that this chiral N-H band consists of four, instead of two, distinctive peaks, and they are with two groups of opposite spectral phases. Moreover, the phases of these N-H peaks completely flip from the L-LK7β to the D-LK7β peptide, suggesting that the chirality of the N-H in the folded LK7β peptide is completely governed by the chirality of the Cα–H of the amino acids. This discovery provides clue on why proteins in nature are composed of α-amino acids rather than β- or γ-amino acids, and may help us understand the question on the origin of life.

High-resolution broadband sum frequency generation vibrational spectroscopy using intrapulse interference

2018 ◽  
Vol 20 (32) ◽  
pp. 20752-20755
Author(s):  
Yang Wang ◽  
Xiangyun Ma ◽  
Huijie Wang ◽  
Da Chen ◽  
Keng C. Chou ◽  
...  
Keyword(s):  
High Resolution ◽  
Femtosecond Laser ◽  
Vibrational Spectroscopy ◽  
Vibrational Spectra ◽  
Laser System ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
System P ◽  
Frequency Generation

Our reported II-SFG method can obtain high-resolution SFG vibrational spectra with a single femtosecond laser system.

Sum Frequency Generation Vibrational Spectroscopy of 1,3-Butadiene Hydrogenation on 4 nm Pt@SiO2, Pd@SiO2, and Rh@SiO2 Core–Shell Catalysts

Nano Letters ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 39-44 ◽  
Author(s):  
James M. Krier ◽  
William D. Michalak ◽  
Xiaojun Cai ◽  
Lindsay Carl ◽  
Kyriakos Komvopoulos ◽  
...  
Keyword(s):  
Vibrational Spectroscopy ◽  
Sum Frequency Generation ◽  
Core Shell ◽  
Sum Frequency ◽  
Frequency Generation ◽  
Butadiene Hydrogenation

Study of FeOx/Au inverse model catalysts by in situ sum frequency generation vibrational spectroscopy

2009 ◽  
Vol 96 (2) ◽  
pp. 345-356 ◽  
Author(s):  
Orsolya Hakkel ◽  
Zoltán Pászti ◽  
Tamás Keszthelyi ◽  
Krisztina Frey ◽  
László Guczi
Keyword(s):  
Vibrational Spectroscopy ◽  
Sum Frequency Generation ◽  
Inverse Model ◽  
Model Catalysts ◽  
Sum Frequency ◽  
Frequency Generation
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