氟代呋喃-噻吩齐聚物的合成与表征

Synthesis and Characterization of Fluorinated Furan-Thiophene Oligomers

呋喃噻吩齐聚物具有优异的性质,主要采用stille交叉偶联合成。有机氟化合物在各个应用领域都显示出独特的性能,目前合成氟代呋喃环的方法非常有限。由于氟原子较强的电负性,将氟原子引入芳香环使得邻位的C-H键易于接受亲核试剂的进攻,从而使简单的氟代化合物能够转变成较为复杂的结构。该研究发展了合成单氟呋喃类化合物的方法,以2-噻吩乙炔为起始原料,在碱的作用下合成单氟呋喃环骨架,并通过溴封端的噻吩-氟代呋喃-噻吩中间体与硼酸酯反应制备氟代呋喃-噻吩齐聚物,考察了氟代呋喃-噻吩齐聚物的结构等对样品的光谱吸收范围、发光波长和热稳定性能的影响。

Furan thiophene oligomers have excellent properties, mainly through stille cross-coupling synthesis. Organic fluorine compounds exhibit unique properties in various application areas, the method of synthesizing fluorinated furan ring is very limited at present. Because of the strong electro negativity of the fluorine atom, the introduction of the fluorine atom ortho to the aromatic ring makes the CH bond receptive nucleophile attack, so that simple fluorinated compound can be converted into more complex structure. This paper developed a new method for the synthesis of single-fluo-furan compounds. 2 -- thienyl acetylene as starting material, under the action of a base, the single--fluoro furan ring skeleton was synthesized. Bromine--capped thiophene- fluoro--furan -- thiophene intermediate was produced, and then it was reacted with boric acid esters, prepared thiophene -- fluoro-furan - thiophene oligomers. Effects of fluo rinated furan -- thiophene oligomer structure on the sample absorption range, the wavelength of light emission and thermal stability was investigated.