A photosensitizer Cy3 with p-carboxybenzyl groups on the nitrogen atoms in its indole ring for dye-sensitized solar cells has been designed and synthesized in this paper.The intermediate p-carboxybenzyl-2,3,3-trimethyl-3H-indoleninium-5-sulfonate potassium condensed with triethyl orthoformate to form the cyanine by traditional oil and ultrasonic methods respectively.The results showed that the ultrasonic method could make the synthetic reaction time shorter, temperature lower and yield higher.The product was separated and purified by column chromatography with the mixture of isopropyl alcohol and water (5 : 1, V/V) as the eluant.The maximum UV-vis absorption wavelength and fluorescence emission wavelength of Cy3 were 551 nm and 565 nm in water respectively.Compared with them in water, the absorption and emission wavelengths did not change but the fluorescence strength increased a lot in α-CD solution.%设计合成了Cy3菁染料太阳能电池光敏剂,其结构特点是分子中吲哚环氮原子上的取代基为对羧苄基.本文通过自行合成的染料中间体N-对羧苄基-2,3,3-三甲基-3H-吲哚啉-5-磺酸钾在超声波作用下与原甲酸三乙酯缩合制备得到了该染料.结果表明,超声波法具有反应时间短、温度低和收率高等优点;探讨了3种洗脱剂对产品的柱分离效果,其中异丙醇∶水=5∶1效果最佳;分析测试了Cy3菁染料的光谱性能,在水溶液中Cy3的最大紫外-可见吸收波长为551 nm,最大荧光发射波长为565 nm与其相比,在α-环糊精水溶液中,最大吸收和荧光发射波长不变,荧光发射强度有所增加.
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