Sum-frequency generation of acetate adsorption on Au and Pt surfaces: Molecular structure effects

2010 ◽  
Vol 133 (23) ◽  
pp. 234702 ◽  
Author(s):  
Björn Braunschweig ◽  
Prabuddha Mukherjee ◽  
Robert B. Kutz ◽  
Andrzej Wieckowski ◽  
Dana D. Dlott
Keyword(s):  
Molecular Structure ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Frequency Generation

scholarly journals Surface-specific vibrational spectroscopy of the water/silica interface: screening and interference

2017 ◽  
Vol 19 (25) ◽  
pp. 16875-16880 ◽  
Author(s):  
Jan Schaefer ◽  
Grazia Gonella ◽  
Mischa Bonn ◽  
Ellen H. G. Backus
Keyword(s):  
Molecular Structure ◽  
Vibrational Spectroscopy ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Sum Frequency Generation Spectroscopy ◽  
Frequency Generation

Surface-specific vibrational sum-frequency generation spectroscopy (V-SFG) is used to obtain information about the molecular structure at charged interfaces.

scholarly journals Molecular Structure and Modeling of Water–Air and Ice–Air Interfaces Monitored by Sum-Frequency Generation

2020 ◽  
Vol 120 (8) ◽  
pp. 3633-3667 ◽  
Author(s):  
Fujie Tang ◽  
Tatsuhiko Ohto ◽  
Shumei Sun ◽  
Jérémy R. Rouxel ◽  
Sho Imoto ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Frequency Generation ◽  
Air Interfaces

Vibrational sum-frequency generation study of molecular structure, sterical constraints and nonlinear optical switching contrast of mixed alkyl-azobenzene self-assembled monolayers

2020 ◽  
Vol 234 (7-9) ◽  
pp. 1427-1452 ◽  
Author(s):  
Saira Riaz ◽  
Gernot Friedrichs
Keyword(s):  
Molecular Structure ◽  
Nonlinear Optical ◽  
Sum Frequency Generation ◽  
Self Assembled Monolayers ◽  
Sum Frequency ◽  
Nlo Response ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Frequency Generation ◽  
Insight Into

AbstractSelf-assembled monolayers (SAMs) of azobenzene (AB) functionalized alkyl thiols on gold diluted with simple alkyl thiols provide a straightforward way to photochromic surfaces with high and tunable photoswitching efficiency. Trans-cis isomerization of the AB molecule changes the physical properties of the surface, including the nonlinear optical (NLO) response. Vibrational sum-frequency generation (VSFG) spectroscopy as a nonlinear type of laser spectroscopy offers surface- and orientation-sensitive insight into the molecular structure of mixed SAMs. In this study, VSFG as well as ultraviolet-visible (UV/Vis) spectroscopy has been employed to investigate the morphology, molecular structure, and NLO response of mixed SAMs with systematically varied surface composition. Methylazobenzene (MeAB) has been used as the molecular switch with the methyl substituent serving as orientational VSFG marker. Both short-chain and long-chain alkyl thiol co-ligands have been used to gain insight into the interplay between SAM structure and sterical constraints that are known to limit the free switching volume. Underlining the dominating role of sterical effects for controlling photochromic properties, a strong inhibition of the photoswitching efficiency and NLO response has been observed for the SAMs with an alkyl thiol co-ligand long enough to spatially extend into the layer of the MeAB chromophore. Overall, with <12% signal change, the relative NLO switching contrasts remained low in all cases. VSFG spectral trends clearly revealed that the presumably higher photoswitching efficiency upon dilution with the co-ligand is counteracted by a loss of structural order of the chromophore.

scholarly journals The surface roughness, but not the water molecular orientation varies with temperature at the water–air interface

2015 ◽  
Vol 17 (36) ◽  
pp. 23559-23564 ◽  
Author(s):  
Yuki Nagata ◽  
Taisuke Hasegawa ◽  
Ellen H. G. Backus ◽  
Kota Usui ◽  
Seiji Yoshimune ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Surface Roughness ◽  
Temperature Dependence ◽  
Molecular Orientation ◽  
Sum Frequency Generation ◽  
Sum Frequency ◽  
Air Interface ◽  
Frequency Generation

We examine the temperature dependence of the interfacial molecular structure at the water–air interface by combining experimental and simulated sum-frequency generation (SFG) spectroscopy.

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