Efficient synthesis of discrete oligo(fluorenediacetylene)s toward chain-length-dependent optical and structural properties
Efficient synthesis of discrete oligo(fluorenediacetylene)s toward chain-length-dependent optical and structural properties
复制标题
高效合成离散低聚（芴二乙炔）以实现链长依赖的光学和结构特性
DOI：
10.1039/d1py00165e
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发表时间：
2021
影响因子：
4.6
通讯作者：
Xiulin Zhu
中科院分区：
文献类型：
--
作者：
Xianheng Shi;Min Liu;Lishan Li;Ji;ong Zhang;Haiyan Li;Zhihao Huang;Wei Zhang;Zhengbiao Zhang;Nianchen Zhou;Xiulin Zhu
离散低聚物是理解聚合物结构依赖性质的完美候选者。本文利用自动闪柱色谱法从多分散聚合物中分离得到了一系列聚合度（DP）高达10的离散共轭低聚芴二乙炔（D-oFDAs）。发现链长不仅影响光物理性质，而且影响晶体性质。随着DP的增加，共轭长度变长导致其光谱红移，结晶度变弱。有效共轭长度已被推断为长达9个氟二乙炔单位。此外，低聚物可以通过溶液铸造形成均匀的薄膜，用于制造发光二极管，表明该八聚体具有最有效的电致发光（EL）性能。当二聚体的晶体暴露在254 nm紫外光下时，只有部分样品通过1,4加成反应聚合。值得注意的是，这种简单、可扩展和有效的策略为进一步优化不同块和侧链的结构提供了机会，从而可以精确地构建大分子结构。
Discrete oligomers are perfect candidates for understanding the structure-dependent properties of polymers. Herein, a series of discrete conjugated oligo(fluorenediacetylene)s (D-oFDAs) with a degree of polymerization (DP) up to 10 were obtained by purification with automated flash column chromatography from polydisperse polymers. It is found that the chain length can affect not only photophysical properties but also crystalline properties. As the DP of D-oFDAs increased, the longer conjugation length caused red shifts in their optical spectra and weaker crystallinity. The effective conjugation length has been extrapolated to be as long as 9 fluorenediacetylene units. Moreover, the oligomers can form uniform films by solution casting for the fabrication of light-emitting diodes, showing that the octamer has the most efficient electroluminescence (EL) properties. When the crystal of the dimer was exposed to 254 nm UV light, only part of the sample was polymerized via a 1,4-addition reaction. Significantly, the simple, scalable and effective strategy provides opportunities to further optimize the structure with diverse blocks and side chains for precisely building macromolecular architectures.
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影响因子：
3.6
作者：
HAY, AS
通讯作者：
HAY, AS
含有三芴和五芴侧链的聚（芳基醚）可实现高效蓝光发射
影响因子：
5.5
作者：
Yao, B;Jin, XB;Wang, LX;Geng, YH;Jiang, GX;Wang, FS;Cheng, YX;Xie, ZY
通讯作者：
Xie, ZY
影响因子：
15
作者：
Lawrence J;Lee SH;Abdilla A;Nothling MD;Ren JM;Knight AS;Fleischmann C;Li Y;Abrams AS;Schmidt BV;Hawker MC;Connal LA;McGrath AJ;Clark PG;Gutekunst WR;Hawker CJ
通讯作者：
Hawker CJ
影响因子：
21.8
作者：
Barnes, Jonathan C.;Ehrlich, Deborah J. C.;Johnson, Jeremiah A.
通讯作者：
Johnson, Jeremiah A.
影响因子：
15
作者：
Zhang, Lei;Colella, Nicholas S.;Briseno, Alejandro L.
通讯作者：
Briseno, Alejandro L.