Qiu Wen-Ge, Li Zong-Feng, Bai Guang-Mei, Meng Sheng-Nan, Dai Hong-Xing, He Hong
Department of Chemical Science and Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Dec 31;68(5):1164-9. doi: 10.1016/j.saa.2007.01.015. Epub 2007 Jan 25.
The interaction of a cationic water-soluble porphyrin, 5,10,15,20-tetrakis [4-(3-pyridiniumpropoxy)phenyl]porphyrin tetrakisbromide (TPPOC3Py), with anionic surfactant, sodium dodecyl sulfate (SDS), in aqueous solution has been studied by means of UV-vis, (1)H NMR, fluorescence, circular dichroism (CD) spectra and dynamic laser light scattering (DLLS), and it reveals that TPPOC3Py forms porphyrin-surfactant complexes (aggregates), including ordered structures J- and H-aggregates, induced by association with surfactant monomers below the SDS critical micelle concentration (cmc), and forms micellized monomer upon the cmc, respectively. The position of TPPOC3Py in the micelle is determined, which is not in the micelle core instead of intercalated among the SDS chains, most likely with the pyridinium group extending into the polar headgroup region of the micelle.
通过紫外 - 可见光谱、核磁共振氢谱（¹H NMR）、荧光光谱、圆二色光谱（CD）和动态激光光散射（DLLS）研究了阳离子水溶性卟啉5,10,15,20 - 四[4 - (3 - 吡啶丙氧基)苯基]卟啉四溴化物（TPPOC3Py）与阴离子表面活性剂十二烷基硫酸钠（SDS）在水溶液中的相互作用。研究表明，在SDS临界胶束浓度（cmc）以下，TPPOC3Py与表面活性剂单体缔合形成卟啉 - 表面活性剂复合物（聚集体），包括有序结构J - 聚集体和H - 聚集体；而在cmc以上则形成胶束化单体。确定了TPPOC3Py在胶束中的位置，它不在胶束核心，而是插在SDS链之间，吡啶鎓基团很可能延伸到胶束的极性头基区域。
