在本實驗室先期研究開發出一系列新的線型共軛分子1,4-二芳基萘、1,4-二芳基蒽，其中1,4-二(2,2’-聯噻吩-5-基)萘，吸收波長357~367nm、放射波長487~497nm、斯托克斯位移130~138nm；1,4-二(2,2’-聯噻吩-5-基)蒽，吸收波長405~412nm、放射波長506~539nm、斯托克斯位移100~128nm，這些分子雖然具有不錯的光物理性質，但在連接多個芳香環後，溶解度變差以至無法繼續合成更多之共軛單元。本研究結合先期研究系列化合物的特徵，開發出一系列新的線型共軛分子，引入正己基增加骨架溶解度，並探討烷基鄰近及遠離中心骨架芳香環的光物理性質。
研究會分成兩個部分：直線延伸3個共軛芳香環 TcNTc，直線延伸五個共軛芳香環，分別是TTcNTcT、PTcNTcP 和烷基遠離中心骨架芳香環 TcTNTTc。蒽有較好垂直的共軛性，故合成TcATc，再直線延伸五個共軛芳香環TcTATTc，以上都會與先前研究探討分子構型以及光物理性質。

In our previous research, many conjugated molecules of 1,4-diarylanthracenes and 1,4-diarylnaphthalene have been synthesized, among which 1,4-di([2,2'-bithiophen]-5-yl)naphthalene, absorption spectra show the absorption in the range of 357~367 nm, while the fluorescence spectra show the emission in the range of 487~497 nm and the Stokes shift is about 130~138 nm. The conjugation of anthracene is better than naphthalene, which has significant bathochromic shifts in both absorption and fluorescence.
Preliminary study has found that the possibility of extending the aromatic ring is limited by poor solubility. To solve this problem, we further synthesize a new type of nonpolar large-Stokes-Shift molecules containing the cores of 1,4-di(2,2’-bithiophene-5-yl)-anthracene with n-hexyl group, which is a vital solution to improve solubility.
The study was divided into two parts: First, TcNTc will be synthesized, and to improve ℼ-conjugation by the lateral aromatic rings, TTcNTcT, PTcNTcP will be synthesized respectively. TcTNTTc with an alkyl group away from the central skeleton aromatic ring has a good conjugation will be a comparison. Then, TcATc, and the extending five conjugated aromatic ring TcTATTc will also be synthesized. Finally six target compounds will measure their absorption spectrum, fluorescence spectrum, fluorescence quantum yield and extinction coefficient. We will discuss the molecular configuration and photophysical properties with previous studies.

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