Cyanines as functional molecules with large molar extinction coefficients and broad wavelength tenability have been widely applied in various high-tech fields:as photosensitizers in solar cells,and fluorescence probes in sensors for fluorescent detection of trace organic substance or metal ions,etc.In this project,on the basis of pentamethine and heptamethine indocyanines with N-p-carboxybenzyl,N-ethyl or N-methyl groups inthe indole rings from2,3,3-trimethyl-3 H-indoleninium-5-sulfonate,novel aminoderivatives were developed by benzylamine,p-aminoazobenzene,taurine or butylamine reacting with the cyanines for substitution nitrogen for the oxygen or chlorine.The cyanines and their aminoderivatives obtained were separated and purified by SiO2 column chromatography,were confirmed by 1 HNMR and ESI-MS,and the properties of them were investigated.Graphene with excellent specific surface area,thermostability and electron transfer rate has attracted a lot of attention in many fields,but its applications have been limited due to its poor solubility.Modified graphene with good solubility in water was obtained by the reaction of phenylhydrazine-4-sulfonic acid with graphene oxide,and was applied to composite well with the cyanines and aminoderivatives synthesized above,and/or nanosemiconductors materials from various metal precursors for the anode materials.They showed good performance and could be used for dye-sensitized solar cell.