Ultraviolet Photoelectron Spectroscopy of Organic Sulfur Compounds

2006 ◽  
pp. 135-195 ◽  
Author(s):  
J. Barrie Peel
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Ultraviolet Photoelectron Spectroscopy ◽  
Organic Sulfur Compounds

scholarly journals Influence of Oxidation of Copper on Shear Bond Strength to an Acrylic Resin Using an Organic Sulfur Compound

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2092
Author(s):  
Haruto Hiraba ◽  
Hiroyasu Koizumi ◽  
Akihisa Kodaira ◽  
Hiroshi Nogawa ◽  
Takayuki Yoneyama ◽  
...  
Keyword(s):  
Bond Strength ◽  
Photoelectron Spectroscopy ◽  
Shear Bond Strength ◽  
Acrylic Resin ◽  
Optical Microscope ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Organic Sulfur Compound ◽  
Organic Sulfur Compounds ◽  
Wet Ground

The aim of this study was to clarify the influence of the copper surfaces changed from Cu or Cu2O to CuO on the bonding strength of resin with organic sulfur compounds. The disk-shaped specimens (n = 44) of copper were wet-ground. Half of the specimens were heated at 400 °C for 4 min in an electric furnace (HT: heated). Half of the specimens were not heated (UH: unheated). The specimens were further divided into two groups. Each group was primed by 6-methacryloyloxyhexyl 2-thiouracil-5-carboxylate (MTU-6) or unprimed (n = 11). A statistical analysis of the results of shear bond strength testing was performed, and the failure mode of the bonded areas was classified with an optical microscope. Two types of specimen surface (UH or HT) were analyzed chemically using X-ray photoelectron spectroscopy (XPS). When primed with MTU-6, unheated Cu (28.3 MPa) showed greater bond strength than heated (19.1 MPa). When unprimed, heated Cu (4.1 MPa) showed greater bond strength than unheated (2.3 MPa). The results of the debonded surfaces observation showed that only the UH-MTU-6 group demonstrated a combination of adhesive and cohesive failures in all specimens. The XPS results showed that the surface of copper changed from Cu or Cu2O to CuO when HT. These results confirmed that it is necessary to take care of the copper oxide contained in noble metal alloys when using organic sulfur compounds for adhesion.

Relationship between Molecular Structures of Organic-Sulfur Compounds and Metal Forming Performance

2016 ◽  
Vol 716 ◽  
pp. 190-198 ◽  
Author(s):  
Tomohiro Takaki ◽  
Shogo Ito ◽  
Kazuhiko Kitamura ◽  
Kazuhiro Yagishita ◽  
Junichi Shibata
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
High Performance ◽  
Iron Sulfide ◽  
Sulfur Compounds ◽  
Molecular Structures ◽  
Organic Sulfur ◽  
Cold Forming ◽  
Organic Sulfur Compounds ◽  
Fatty Oil

Oil with a chlorinated extremely-pressure additive (EP-additive) is effective to prevent galling in cold forming for stainless steel. However environmental issues have pressured the manufacture to replace this oil with high performance oil without chloride. Particularly, sulfur-based EP-additives are accepted as a practicable replacement for chlorinated EP-additives. Thus, the authors analyzed the structures of organic-sulfur compounds. Moreover, the effects of the molecular structures on the anti-galling performance are estimated by a cup internal ironing test. This test has been devised to classify the performance of sample oils by the ironing load and the damage on the workpiece after the test. Consequently, sulfurized olefin was superior to sulfurized ester and sulfurized fatty oil in cold ironing for stainless steel. It was also clarified that sulfur EP-additives generated iron sulfide and sulfate on the surface of stainless steel by using the surface analyses of X-ray photoelectron spectroscopy.

scholarly journals Pollution status of volatile organic sulfur compounds causing odor in Xi River and factors influencing spatial distribution

2020 ◽  
Vol 20 (4) ◽  
pp. 1264-1270
Author(s):  
Xiang Tu ◽  
Shaohua Chen ◽  
Siyu Wang ◽  
Haiqing Liao ◽  
Xuejiao Deng
Keyword(s):  
Spatial Distribution ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Industrial Emissions ◽  
Diethyl Sulfide ◽  
Organic Sulfur Compounds ◽  
Factors Influencing ◽  
Pollution Status ◽  
Volatile Organic ◽  
Volatile Organic Sulfur Compounds

Abstract This study investigated the pollution status of volatile organic sulfur compounds (VOSCs) and the factors influencing their spatial distribution in the Xi River in Shenyang, China. A method for simultaneous determination of 14 VOSCs that cause odor in water samples was developed by using purge and trap coupled with gas chromatography and a flame photometric detector. The results indicated that each target compound could be identified from 15 sampling sites, and the total concentration of 14 VOSCs ranged from 2.575 to 52.981 μg L−1. Dimethyl sulfide (DMS) was the most important contaminant with an average concentration of 4.029 μg L−1, a detection rate of 93.33% and a variation coefficient of 0.72. The VOSCs were primarily distributed in suburban and rural sections, and the suburban section was the worst in regard to pollution by VOSCs. Dimethyl trisulfide was primarily distributed in urban and suburban sections of the Xi River due to industrial emissions. Ethanethiol, DMS, and ethyl methyl sulfide, which are typical by-products of microbial anaerobic decomposition from domestic wastewater, were found in abundance in the suburban section. Diethyl sulfide, diethyl disulfide, methyl propyl disulfide, and 1-propyl disulfide representing agricultural nonpoint source pollution were mostly distributed in the rural section.

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