2-(2,6-bis((E)-2-(5-bromo-3,4-dihexylthiophen-2-yl)vinyl)-4H-pyran-4-ylidene)malononitrile | 1220888-23-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃
• 英文名称: 2-(2,6-bis((E)-2-(5-bromo-3,4-dihexylthiophen-2-yl)vinyl)-4H-pyran-4-ylidene)malononitrile
• 英文别名: 2-[2,6-bis[(E)-2-(5-bromo-3,4-dihexylthiophen-2-yl)ethenyl]pyran-4-ylidene]propanedinitrile
• CAS: 1220888-23-2
• 化学式: C₄₄H₅₈Br₂N₂OS₂
• 分子量: 854.897
• InChiKey: USUIQUNLINWQHJ-NBHCHVEOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  18.5
• 重原子数：
  51
• 可旋转键数：
  24
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  113
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  试剂2,5-Dibromo-3,4-dihexylthiophene 在 哌啶 、 正丁基锂 作用下， 以 四氢呋喃 、 丙醇 、 正己烷 为溶剂， 反应 50.0h， 生成 2-(2,6-bis((E)-2-(5-bromo-3,4-dihexylthiophen-2-yl)vinyl)-4H-pyran-4-ylidene)malononitrile
  参考文献：
  名称：

  Molecular structure–property engineering for photovoltaic applications: Fluorene-acceptor alternating conjugated copolymers with varied bridged moieties

  摘要：

  A series of novel soluble conjugated copolymers consisting of electron-accepting 2-pyran-4-ylidene-malononitrile (PM) and electron-donating fiuorene connected by different electron-donating ability conjugated moieties were synthesized by Suzuki coupling polymerization. The structures of the copolymers were characterized and their physical properties were investigated. High molecular weight (M,, up to 43.8 kg/mol) and thermostable copolymers were obtained. The conjugated bridge between PM and fluorene building block with gradually increased electron-donating ability moieties results in enhanced intramolecular charge transfer (ICT) transition bands, which lead to an extension of their absorption spectral range. Cyclic voltammetry measurement displayed that the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of the copolymers can be fine-tuned. The resulting copolymers possessed relatively low HOMO energy levels, promising good air stability and high open circuit voltage (V-oc) for photovoltaic application. Bulk heterojunction photovoltaic devices were fabricated by using the copolymers as donors and (6,6)-phenyl C-61-butyric acid methyl ester (PCBM) as acceptor. The power conversion efficiencies (PCE) of the devices were in the range of 0.02-0.52% under simulated AM 1.5 solar irradiation of 100 mW/cm(2), and the highest V-oc reached 0.82 V. The significant improvement of PCE indicates a novel concept for developing donor-acceptor (D-A) conjugated copolymers with high photovoltaic performance by adjusting electron-donating ability of conjugated bridge. (C) 2010 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.polymer.2010.01.039