S,S',S'',S'''-(12,32,52,72-tetrabutoxy-1,3,5,7(1,3)-tetrabenzenacyclooctaphane-15,35,55,75-tetrayl) tetraethanethioate | 1071456-13-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: S,S',S'',S'''-(12,32,52,72-tetrabutoxy-1,3,5,7(1,3)-tetrabenzenacyclooctaphane-15,35,55,75-tetrayl) tetraethanethioate
• CAS: 1071456-13-7
• 化学式: C₅₂H₆₄O₈S₄
• 分子量: 945.339
• InChiKey: SEKVZZSARYOIJV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  13.63
• 重原子数：
  64.0
• 可旋转键数：
  20.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  105.2
• 氢给体数：
  0.0
• 氢受体数：
  12.0

反应信息

• 作为产物：
  描述：

  杯[4]芳烃 在 N-溴代丁二酰亚胺(NBS) 、 叔丁基锂 、 sodium hydride 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 、 丁酮 、 正戊烷 为溶剂， 反应 60.5h， 生成 S,S',S'',S'''-(12,32,52,72-tetrabutoxy-1,3,5,7(1,3)-tetrabenzenacyclooctaphane-15,35,55,75-tetrayl) tetraethanethioate
  参考文献：
  名称：

  量身定制化学改性的铂纳米催化剂的选择性和稳定性，以设计用于PEM燃料电池的高度耐用的阳极

  摘要：

  大大小小：用杯[4]芳烃化学修饰铂可产生高度稳定的阳极催化剂，该催化剂可有效抑制氧化还原反应，而不会改变氢氧化反应的最大活性（参见图片，Pt蓝色，C灰色，O红色，S黄色的）。这种行为从长程有序的阶梯状单晶表面扩展到了纳米催化剂。

  DOI：

  10.1002/anie.201100744

文献信息

• Highly Durable and Active PtFe Nanocatalyst for Electrochemical Oxygen Reduction Reaction
  作者：Dong Young Chung、Samuel Woojoo Jun、Gabin Yoon、Soon Gu Kwon、Dong Yun Shin、Pilseon Seo、Ji Mun Yoo、Heejong Shin、Young-Hoon Chung、Hyunjoong Kim、Bongjin Simon Mun、Kug-Seung Lee、Nam-Suk Lee、Sung Jong Yoo、Dong-Hee Lim、Kisuk Kang、Yung-Eun Sung、Taeghwan Hyeon

  DOI：10.1021/jacs.5b09653

  日期：2015.12.16

  Demand on the practical synthetic approach to the high performance electrocatalyst is rapidly increasing for fuel cell commercialization. Here we present a synthesis of highly durable and active intermetallic ordered face-centered tetragonal (fct)-PtFe nanoparticles (NPs) coated with a "dual purpose" N-doped carbon shell. Ordered fct-PtFe NPs with the size of only a few nanometers are obtained by thermal annealing of polydopamine-coated PtFe NPs, and the N-doped carbon shell that is in situ formed from dopamine coating could effectively prevent the coalescence of NPs. This carbon shell also protects the NPs from detachment and agglomeration as well as dissolution throughout the harsh fuel cell operating conditions. By controlling the thickness of the shell below 1 nm, we achieved excellent protection of the NPs as well as high catalytic activity, as the thin carbon shell is highly permeable for the reactant molecules. Our ordered fct-PtFe/C nanocatalyst coated with an N-doped carbon shell shows 11.4 times-higher mass activity and 10.5 times-higher specific activity than commercial Pt/C catalyst. Moreover, we accomplished the long-term stability in membrane electrode assembly (MEA) for 100 h without significant activity loss. From in situ XANES, EDS, and first-principles calculations, we confirmed that an ordered fct-PtFe structure is critical for the long-term stability of our nanocatalyst. This strategy utilizing an N-doped carbon shell for obtaining a small ordered-fct PtFe nanocatalyst as well as protecting the catalyst during fuel cell cycling is expected to open a new simple and effective route for the commercialization of fuel cells.