Zheng Xiao, Nagura Kazuhiko, Takaya Tomohisa, Hashi Kenjiro, Nakanishi Takashi
Division of Soft Matter, Graduate School of Life Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, 060-0810, Japan.
International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Japan.
Chemistry. 2023 Apr 13;29(21):e202203775. doi: 10.1002/chem.202203775. Epub 2023 Mar 13.
Alkyl-π functional molecular liquids (FMLs) are of interest for fabricating soft electronic devices due to their fluidic nature and innate optoelectronic functions from the π-conjugated moiety. However, predictable development of alkyl-π FMLs with the desired liquid and optoelectronic properties is challenging. A series of alkyl-distyrylbenzene (DSB) liquids was studied in terms of the substituent position effect by attaching 2-octyldodecyl chains at (2,4-), (2,5-), (2,6-), and (3,5-). The effect of the alkyl chain length was investigated by attaching 2-hexyldecyl, 2-decyltetradecyl (C C ), and 2-dodecylhexadecyl at the (2,5-) substituent position. The 2,5-C C substituent pattern constructed a superior alkyl-DSB liquid with a lower viscosity, intrinsic optical properties, and high thermal- and photo-stabilities. The discovered 2,5-C C was applied to dicyanostyrylbenzene and comparable liquid physical and optical superiorities were confirmed. This molecular design is useful for creating alkyl-π FMLs with the aforementioned advantages, which are applicable for deformable and flowable optoelectronic devices.
烷基-π功能分子液体（FMLs）因其流体性质以及π共轭部分固有的光电功能，在制造柔性电子器件方面具有重要意义。然而，要可预测地开发出具有所需液体和光电性能的烷基-π FMLs具有挑战性。通过在（2,4-）、（2,5-）、（2,6-）和（3,5-）位置连接2-辛基十二烷基链，研究了一系列烷基二苯乙烯基苯（DSB）液体的取代基位置效应。通过在（2,5-）取代基位置连接2-己基癸基、2-癸基十四烷基（C C）和2-十二烷基十六烷基，研究了烷基链长度的影响。2,5-C C取代基模式构建了一种具有较低粘度、固有光学性质以及高热稳定性和光稳定性的优质烷基-DSB液体。所发现的2,5-C C应用于二氰基苯乙烯基苯，并证实了类似的液体物理和光学优势。这种分子设计对于创建具有上述优点的烷基-π FMLs很有用，这些FMLs适用于可变形和可流动的光电器件。
