Einkommensteuer

Schmidt, Lutz; Sigloch, Jochen; Henselmann, Klaus

doi:10.1007/978-3-322-94640-9_4

Cited by 1 publication

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“…A phenol is generally produced via cumene or by the reaction of a sulfonated or halogenated ring with a strong base such as sodium hydroxide. [42,43] Even if a phenol group is produced, it easily reacts because its ionized structure (a phenoxide ion) is more stable than the non-ionized structure, forming a coal tar or being further oxidized into carbon dioxide. [44] Thus, the phenol structure is not introduced by the wet-oxidation treatment.…”

Section: Resultsmentioning

confidence: 99%

Surface oxidation process of a diamond-like carbon film analyzed by difference X-ray photoelectron spectroscopy

Takabayashi

Takahagi

2014

Surf. Interface Anal.

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Difference X‐ray photoelectron spectroscopy (D‐XPS) revealed the surface oxidation process of a diamond‐like carbon (DLC) film. Evaluation of surface functional groups on DLC solely by the C 1s spectrum is difficult because the spectrum is broad and has a secondary asymmetric lineshape. D‐XPS clarified the subtle but critical changes at the DLC surface caused by wet oxidation. The hydroxyl (C―OH) group was dominant at the oxidized surface. Further oxidized carbonyl (CO) and carboxyl (including carboxylate) (COO) groups were also obtained; however, the oxidation of CO to COO was suppressed to some extent because the reaction required C―C bond cleavage. Wet oxidation cleaved the aliphatic hydrogenated and non‐hydrogenated sp2 carbon bonds (C―H sp2 and C―C sp2) to create a pair of C―OH and hydrogenated sp3 carbon (C―H sp3) bonds. The reaction yield for C―H sp2 was superior at the surface, suggesting that the DLC film was hydrogen rich at the surface. Oxidation of aromatic sp2 rings or polycyclic aromatic hydrocarbons such as nanographite to phenols did not occur because of their resonance stabilization with electron delocalization. Non‐hydrogenated sp3 carbon (C―C sp3) bonds were not affected by oxidation, suggesting that these bonds are chemically inert. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%