2,7-dihydroxyfluorene | 854538-78-6

• 分子结构分类: 有机化合物 - 苯类化合物 - 芴
• 英文名称: 2,7-dihydroxyfluorene
• 英文别名: 2,7-Dihydroxy-fluoren；3,6-Dihydroxyfluorene；9H-fluorene-3,6-diol
• CAS: 854538-78-6
• 化学式: C₁₃H₁₀O₂
• 分子量: 198.221
• InChiKey: KZWXZOALXHCWKJ-UHFFFAOYSA-N

物化性质

• 沸点：
  426.6±38.0 °C(Predicted)
• 密度：
  1.365±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  15
• 可旋转键数：
  0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.08
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1-溴十一烷 、 2,7-dihydroxyfluorene 在 potassium carbonate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以28%的产率得到2,7-di-n-undecyloxyfluorene
  参考文献：
  名称：

  Molecular Mechanism of Anomalous Increase in the Helical Pitch of Cholesteric Liquid Crystals Induced by Achiral Dopants

  摘要：

  A dopant-induced anomalous increase in the helical pitch of dicholesteryl 10,12-docosadiynedioate 1 is explained by generation of smectic clusters in the cholesteric phase where the dopants act as promoters of smectic domains. The dopants, having a mesogenic core and the proper length of alkyl chains on both their molecular sides, such as 4,4'-dialkylazobenzenes, 4,4'-dialkylazoxybenzenes and 4,4'-dialkylbiphenyls, considerably increase the pitch. However, dopants having benzene or a binaphthyl structure in the molecular center, an alkyl chain at one side of the molecules and Z-isomers of azobenzene and azoxybenzene derivatives, slightly decrease the pitch by acting as impurities that decrease the transition temperature of the host. An X-ray diffraction study of the cholesterics revealed that the pitch increases with an increase in size and amount of the smectic domains induced by the appropriate dopants.

  DOI：

  10.1021/jp034916e
• 作为产物：
  描述：

  2,7-二溴芴 在 sodium hydroxide 、 copper(I) bromide 作用下， 反应 6.0h， 以8.8%的产率得到2,7-dihydroxyfluorene
  参考文献：
  名称：

  Molecular Mechanism of Anomalous Increase in the Helical Pitch of Cholesteric Liquid Crystals Induced by Achiral Dopants

  摘要：

  A dopant-induced anomalous increase in the helical pitch of dicholesteryl 10,12-docosadiynedioate 1 is explained by generation of smectic clusters in the cholesteric phase where the dopants act as promoters of smectic domains. The dopants, having a mesogenic core and the proper length of alkyl chains on both their molecular sides, such as 4,4'-dialkylazobenzenes, 4,4'-dialkylazoxybenzenes and 4,4'-dialkylbiphenyls, considerably increase the pitch. However, dopants having benzene or a binaphthyl structure in the molecular center, an alkyl chain at one side of the molecules and Z-isomers of azobenzene and azoxybenzene derivatives, slightly decrease the pitch by acting as impurities that decrease the transition temperature of the host. An X-ray diffraction study of the cholesterics revealed that the pitch increases with an increase in size and amount of the smectic domains induced by the appropriate dopants.

  DOI：

  10.1021/jp034916e

文献信息

• 3,6-Fluoren[5]arenes: synthesis, structure and complexation with fullerenes C₆₀ and C₇₀
  作者：Jia-Qi Wang、Ying Han、Chuan-Feng Chen

  DOI：10.1039/d1cc00916h

  日期：——

  in good yields by one-step reaction. The 3,6-fluoren[5]arenes had symmetric pentagon structures with big and rich-electron cavities, which made them form 1 : 1 complexes with fullerenes C60 and C70. The association constants of the complexes were all greater than 105 M−1.

  一种新型的大环芳烃，3,6-芴[5]芳烃，可通过一步反应方便地以高收率合成。3,6-芴[5]芳烃具有对称的五边形结构，具有大而富电子的空穴，这使它们与富勒烯C 60和C 70形成1：1的配合物。配合物的缔合常数均大于10 5 M -1。
• METHANE-TO-ACETATE PATHWAY FOR PRODUCING LIQUID BIOFUELS AND BIORENEWABLES
  申请人：The Penn State Research Foundation

  公开号：US20150147791A1

  公开（公告）日：2015-05-28

  The engineering of a pathway converting CH 4 to acetate and eventually to liquid fuels is disclosed. The engineered pathway involves an engineered reversal of the natural pathway for acetate conversion to CH 4 by microbes and coupling the engineered pathway to existing and future technologies for microbial or chemical conversion of acetate to liquid fuels. In one aspect, methods for producing modified pathways and/or microbes are provided. In another aspect engineered microbes, including Methanosarcina acetivorans, that incorporate the engineered pathway are provided, which can mediate conversion of CH 4 to acetate for ultimate conversion to liquid fuels. In a further aspect, specific modifications to the components of the pathway are provided.
• [EN] METHANE-TO-ACETATE PATHWAY FOR PRODUCING LIQUID BIOFUELS AND BIORENEWABLES<br/>[FR] VOIE MÉTHANE-ACÉTATE UTILISABLE EN VUE DE LA PRODUCTION DE PRODUITS BIO-RENOUVELABLES ET DE BIOCARBURANTS LIQUIDES
  申请人：PENN STATE RES FOUND

  公开号：WO2015077616A2

  公开（公告）日：2015-05-28

  The engineering of a pathway converting CH4 to acetate and eventually to liquid fuels is disclosed. The engineered pathway involves an engineered reversal of the natural pathway for acetate conversion to CH4 by microbes and coupling the engineered pathway to existing and future technologies for microbial or chemical conversion of acetate to liquid fuels. In one aspect, methods for producing modified pathways and/or microbes are provided. In another aspect engineered microbes, including Methanosarcina acetivomns, that incorporate the engineered pathway are provided, which can mediate conversion of CH4 to acetate for ultimate conversion to liquid fuels. In a further aspect, specific modifications to the components of the pathway are provided.
• Molecular Mechanism of Anomalous Increase in the Helical Pitch of Cholesteric Liquid Crystals Induced by Achiral Dopants
  作者：Masatoshi Kidowaki、Masaya Moriyama、Momoyo Wada、Nobuyuki Tamaoki

  DOI：10.1021/jp034916e

  日期：2003.11.1

  A dopant-induced anomalous increase in the helical pitch of dicholesteryl 10,12-docosadiynedioate 1 is explained by generation of smectic clusters in the cholesteric phase where the dopants act as promoters of smectic domains. The dopants, having a mesogenic core and the proper length of alkyl chains on both their molecular sides, such as 4,4'-dialkylazobenzenes, 4,4'-dialkylazoxybenzenes and 4,4'-dialkylbiphenyls, considerably increase the pitch. However, dopants having benzene or a binaphthyl structure in the molecular center, an alkyl chain at one side of the molecules and Z-isomers of azobenzene and azoxybenzene derivatives, slightly decrease the pitch by acting as impurities that decrease the transition temperature of the host. An X-ray diffraction study of the cholesterics revealed that the pitch increases with an increase in size and amount of the smectic domains induced by the appropriate dopants.