2-(benzyliden-(ξ))-5α-ergosten-(8(14))-one-(3) | 120023-47-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: 2-(benzyliden-(ξ))-5α-ergosten-(8(14))-one-(3)
• 英文别名: 2-(Benzyliden-(ξ))-5α-ergosten-(8(14))-on-(3)
• CAS: 120023-47-4
• 化学式: C₃₅H₅₀O
• 分子量: 486.781
• InChiKey: SVBNPJDAWFGGRL-LQWVGTIHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.68
• 重原子数：
  36.0
• 可旋转键数：
  6.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.69
• 拓扑面积：
  17.07
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为产物：
  描述：

  5α-ergost-8(14)-en-3-one 、 苯甲醛 在 乙醇 、 sodium ethanolate 作用下， 生成 2-(benzyliden-(ξ))-5α-ergosten-(8(14))-one-(3)
  参考文献：
  名称：

  Thrust-Washer Evaluation of Self-Lubricating PS304 Composite Coatings in High Temperature Sliding Contact

  摘要：

  PS304 self-lubricating composite coatings were successfully deposited on steel substrates at various plasma spray facilities using mixtures blended from commercially obtained constituent particles. Coatings were evaluated in thrust-washer tests against Inconel X-750 at low contact pressures to 40kPa, sliding speed of 5.4m/s, and either ambient temperature or 500 degreesC chosen to simulate conditions in air foil bearings during startup and shutdown contact. Wear factors for all PS304 coatings tested, regardless of contact pressure and temperature, ranged from 1-3*10(-4) mm(3)/Nm while coefficients of friction of approximately mu = 0.5 were measured in all cases. While wear and friction behavior of PS304 in air foil bearings appear to have been simulated, surface roughening was observed in these thrust-washer tests which used continuous sliding contact, as opposed to the evolution of smoother surfaces observed in high-temperature foil bearings experiencing cyclic startup/shutdown. Wear-induced surface smoothening of PS304 was additionally simulated in thrust-washer tests with sliding contact instead imposed intermittently.

  DOI：

  10.1080/10402000208982579

文献信息

• XANES Analysis of Used Engine Oils and Relationship to Wear
  作者：E. S. Yamaguchi、D. M. Wilson、M. Kasrai、G. M. Bancroft

  DOI：10.1080/10402000208982571

  日期：2002.1

  of the zinc dithiophosphates in used oils. Comparison of this XANES technique with a more traditional technique, 31P nuclear magnetic resonance (NMR) spectroscopy, showed that XANES spectroscopy gave data consistent with NMR. Since these were diesel engine oils, the authors were also able to examine, by solid-state NMR, the soot from two fully formulated engine oils, one a high wear and one a low wear

  多年来，已经开发了许多分析工具来测量发动机油配方中二硫代磷酸锌的消耗。其中许多工具都是显而易见的，例如红外光谱和薄层色谱；然而，在本文中，我们报告了我们使用 X 射线吸收近边结构 (XANES) 光谱检查油中二硫代磷酸锌消耗的研究。因此，XANES 加入了添加剂化学家可用的一系列技术，用于研究废油中二硫代磷酸锌的状态。将此 XANES 技术与更传统的 31P 核磁共振 (NMR) 光谱技术进行比较，表明 XANES 光谱提供与 NMR 一致的数据。由于这些是柴油发动机油，作者还能够通过固态核磁共振检查，来自两种全配方发动机油的烟灰，一种是高磨损油，一种是低磨损油。通过这项研究，作者能够证明 Rounds 的二硫代磷酸锌消耗和磨损的假设似乎是无效的。2002 年 10 月 27-30 日在墨西哥坎昆举行的 ASME/STLE 摩擦学会议上作为摩擦学家和润滑工程师协会的论文发表
• Barton et al., Journal of the Chemical Society, 1960, p. 1297,1301
  作者：Barton et al.

  DOI：——

  日期：——