两种芴类敏化染料的合成及光电性能研究（加急）

Synthesis and photoelectric properties research of two fluorene sensitized dyes

摘要:

将噻吩和呋喃通过缩合反应分别连接到芴的9位，再通过Vilsemier反应，对芴上噻吩和呋喃的2位进行甲酰化，最后与腈乙酸进行 knoevenagel反应，连接上锚定基团，得到两种以芴作为供电基团，以噻吩和呋喃作为 π 桥的染料F-S和F-O。所有的产物及中间产物均经过了1H-NMR验证。测试两种染料的光学性能后发现，虽然两种染料在结构上仅仅是一个原子之差，但是染料F-O的紫外-可见吸收光谱的最大吸收波长相对于染料F-S红移了22 nm。随后组装成电池测试其光电转换性能，结果染料F-O的光电转换效率（η）达到了2.76 %，而染料F-S 的光电转换效率仅仅为1.98 %。这说明，引入合适的 π 桥结构能够大大地提高芴类染料的光电性能。

Abstract:

Thiophene and furan at the 9th position of the fluorene were prepared through condensation reaction as the starting materials, followed with formylation on 2th position of thiophene and furan, then the Knoevenagel condensation of intermediate and acrylic acid gave two simple structure dyes F-S and F-O, which were consisted of flourene as the electron donor, while thiophene and furan as the π bridge. All the intermediates and target dyes were characterized by 1H NMR. After testing the optical properties found that only a single atom change lead to a greatly difference about the two dyes. The maximum absorption wavelengths of UV-vis of dye F-O was 22 nm red shift compared to F-S. The batteries were also assembled and tested, the photoelectric conversion efficiency (PCE) of F-O was 2.76 %, while the efficiency of F-S was just 1.98 %. The results illustrated that the introduction of appropriate π bridge structure can significantly improve the photovoltaic properties of fluorene dyes.