4-pentyl-3',4'-dicyanobiphenyl | 80650-75-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 4-pentyl-3',4'-dicyanobiphenyl
• 英文别名: 4-(4-Pentylphenyl)benzene-1,2-dicarbonitrile
• CAS: 80650-75-5
• 化学式: C₁₉H₁₈N₂
• 分子量: 274.365
• InChiKey: HEEYEMXAVGXWSJ-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  3,4-dibromo-4'-pentyl-1,1'-biphenyl 、 copper(l) cyanide 以 N,N-二甲基甲酰胺 为溶剂， 生成 4-pentyl-3',4'-dicyanobiphenyl
  参考文献：
  名称：

  Effects of Divalent Ligand Interactions on Surface-Induced Ordering of Liquid Crystals

  摘要：

  We report the synthesis of a mesogen that contains two nitrile groups (4-perityl-3',4'-dicyanobiphenyl, DCB), and the use of the mesogen in an- investigation of the effects of multivalent ligand interactions on the ordering of liquid-crystalline phases at surfaces decorated with copper (Cu) ions. Differential scanning calorimetry (DSC) confirmed that DCB was miscible with nematic phases of 4-pentyl-4'-cyanobiphenyl (5CB). Quantitative measurement of the optical retardance of mixtures of DCB and 5CB in contact with surfaces decorated with Cu2+ (characterized by X-ray photoelectron spectroscopy, XPS) revealed a continuous ordering transition in the ncmatic LC as a function of increasing concentration of DCB (0.9-2 wt %). In contrast, Fourier transform infrared (FTIR) spectroscopy of 5 mM Cu2+ dissolved in bulk benzonitrile revealed no evidence of a change in nitrile coordination around the Cu2+ upon addition of 5CB or DCB, thus leading to the proposition that the effect of DCB on the ordering of the LC phases at Cu2+ decorated surfaces is due to divalent coordination interactions of DC13 with the immobilized Cu2+ ions. This hypothesis was further tested by measurements of FTIR spectra and surface-induced ordering transitions of LC phases of DCB/ 5CB upon introduction of dimethylmethylphosphonate (DMMP), an organophosphonate that binds competitively with nitrile groups for Cu2+. These results, when combined, lead us to conclude that it is possible to substantially tune surface-induced ordering of LCs by manipulating the valency of the mesogens and thus coordination interactions of the LCs with metal ions immobilized on surfaces. Overall, the results of this study Ode the design of multifunctional liquid crystals for use as chemoresponsive materials.

  DOI：

  10.1021/cm1011058

文献信息

• JPS56108755A
  申请人：——

  公开号：JPS56108755A

  公开（公告）日：1981-08-28
• Effects of Divalent Ligand Interactions on Surface-Induced Ordering of Liquid Crystals
  作者：Santanu Kumar Pal、Claribel Acevedo-Vélez、Jacob T. Hunter、Nicholas L. Abbott

  DOI：10.1021/cm1011058

  日期：2010.10.12

  We report the synthesis of a mesogen that contains two nitrile groups (4-perityl-3',4'-dicyanobiphenyl, DCB), and the use of the mesogen in an- investigation of the effects of multivalent ligand interactions on the ordering of liquid-crystalline phases at surfaces decorated with copper (Cu) ions. Differential scanning calorimetry (DSC) confirmed that DCB was miscible with nematic phases of 4-pentyl-4'-cyanobiphenyl (5CB). Quantitative measurement of the optical retardance of mixtures of DCB and 5CB in contact with surfaces decorated with Cu2+ (characterized by X-ray photoelectron spectroscopy, XPS) revealed a continuous ordering transition in the ncmatic LC as a function of increasing concentration of DCB (0.9-2 wt %). In contrast, Fourier transform infrared (FTIR) spectroscopy of 5 mM Cu2+ dissolved in bulk benzonitrile revealed no evidence of a change in nitrile coordination around the Cu2+ upon addition of 5CB or DCB, thus leading to the proposition that the effect of DCB on the ordering of the LC phases at Cu2+ decorated surfaces is due to divalent coordination interactions of DC13 with the immobilized Cu2+ ions. This hypothesis was further tested by measurements of FTIR spectra and surface-induced ordering transitions of LC phases of DCB/ 5CB upon introduction of dimethylmethylphosphonate (DMMP), an organophosphonate that binds competitively with nitrile groups for Cu2+. These results, when combined, lead us to conclude that it is possible to substantially tune surface-induced ordering of LCs by manipulating the valency of the mesogens and thus coordination interactions of the LCs with metal ions immobilized on surfaces. Overall, the results of this study Ode the design of multifunctional liquid crystals for use as chemoresponsive materials.