3,6-bis(5-bromo-4-hexylthiophen-2-yl)pyridazine | 1393471-32-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 3,6-bis(5-bromo-4-hexylthiophen-2-yl)pyridazine
• CAS: 1393471-32-3
• 化学式: C₂₄H₃₀Br₂N₂S₂
• 分子量: 570.456
• InChiKey: RAQXNIFDIRSMAJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.7
• 重原子数：
  30.0
• 可旋转键数：
  12.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  25.78
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  3,6-bis(4-hexylthiophen-2-yl)pyridazine 在 N-溴代丁二酰亚胺(NBS) 、 溶剂黄146 作用下， 以 氯仿 为溶剂， 反应 6.0h， 以15%的产率得到3,6-bis(5-bromo-4-hexylthiophen-2-yl)pyridazine
  参考文献：
  名称：

  Effect of Incorporated Nitrogens on the Planarity and Photovoltaic Performance of Donor–Acceptor Copolymers

  摘要：

  Systematic control of the chemical structure of conjugated polymers is critically important to elucidate the relationship between the conjugated polymer structures and properties and to optimize their performance in bulk heterojunction (BHJ) polymer solar cell (PSC) devices. Herein, we synthesized three new copolymers, i.e., P0, P1, and P2; these copolymers contain the same benzodithiophene donor unit but have different acceptor units with different numbers of nitrogen atoms in the range of 0-2. The effects of the introduced nitrogen atoms on the structural, optical, electrical, and photovoltaic properties of the conjugated polymers were investigated; the structural properties of the polymers, in particular, were studied using both experimental (grazing-incidence X-ray scattering (GIXS) measurements) and computational methods (molecular simulation). As the number of introduced nitrogen atoms increased, the planarity of the main chain conformation increased in the order of P0 < P1 < P2 Additionally, the P0, P1, and P2 polymers showed increased interlayer domain spacings of 1.61, 1.72, and 1.78 nm, respectively, with increased intermolecular ordering. These results were in excellent agreement with the simulation results. In addition, the enhanced planarity resulted in a red-shifting at the onset of absorption in the polymer film from 544 to 585 nm, a downshift in the lowest unoccupied molecular orbital (LUMO) energy level from -3.02 to -3.26 eV, and an increase in the hole mobility from 2.33 X 10(-6) to 3.78 x 10(-5) cm(2)/(V s). As a result, we observed dramatically enhanced performance of the PSCs in the order of P0 < P1 < P2. For example, the P2:PC61BM device exhibited a 3.5-fold improvement in power conversion efficiency (PCE) compared to that of P0:PC61BM. The further optimization of P2 with PC71BM showed the PCE of 3.22%.

  DOI：

  10.1021/ma301362t