School of Chemistry and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266510, P. R. China.
Mater Sci Eng C Mater Biol Appl. 2013 Dec 1;33(8):4944-51. doi: 10.1016/j.msec.2013.08.015. Epub 2013 Aug 30.
Various nanostructures of 5,10,15,20-tetrakis(4-carboxyl phenyl)-porphyrin (H2TCPP) can be easily synthesized by a surfactant-assisted self-assembly (SAS) method at different temperatures. When the DMF solution of porphyrin monomer was injected into cetyltimethylammonium bromide (CTAB) aqueous solution by a syringe, diverse H2TCPP nanostructures dependent on the different temperatures, including hollow nanospheres, solid nanospheres and nanospheres with holes, were successfully obtained. As a result, the suitable concentration of the CTAB aqueous solution used to form nanostructues of porphyrin ranges from 0.15 to 0.2 mM. The various morphologies of porphyrin nanostructures were characterized by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM). UV-vis adsorption spectra showed that the micro-/nano-aggregate properties of porphyrin transformed from H-aggretates to J-aggregates during the process of self-assembly of porphyrin at different temperatures. Fluorescence spectra revealed a greater fluorescence quenching of various micro-/nano-aggregatess of porphyrin formed at different temperatures in aqueous solution, compared to the DMF solution of porphyrin monomer.
通过表面活性剂辅助自组装（SAS）方法，可以在不同温度下轻松合成 5,10,15,20-四（4-羧基苯基）卟啉（H2TCPP）的各种纳米结构。当卟啉单体的 DMF 溶液通过注射器注入十六烷基三甲基溴化铵（CTAB）水溶液中时，可以成功获得依赖于不同温度的各种 H2TCPP 纳米结构，包括空心纳米球、实心纳米球和带孔纳米球。结果表明，用于形成卟啉纳米结构的 CTAB 水溶液的合适浓度范围为 0.15 至 0.2mM。通过透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）和扫描电子显微镜（SEM）对卟啉纳米结构的各种形态进行了表征。紫外-可见吸收光谱表明，卟啉在不同温度下自组装过程中，其微/纳聚集态性质从 H-聚集态转变为 J-聚集态。荧光光谱表明，与卟啉单体的 DMF 溶液相比，在水溶液中形成的各种微/纳聚集体的卟啉荧光猝灭程度更大。
