Citation: Huang Cheng-Zhi, Li Yuan-Fang, Huang Xin-Hua, Liu Shao-Pu. Spectral Features of the Aggregation of TPPS4 in the Presence of Cation Surfactant[J]. Acta Physico-Chimica Sinica, ;1998, 14(08): 731-736. doi: 10.3866/PKU.WHXB19980812
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This paper presents the spectroscopic features of the aggregation of meso-tetrakis(p-sulfonatophenyl)porphine(TPPS4)induced by cetyltrimethylammoniumbromide(CTMAB).Spectra studied involve absorption, fluorescence and Resonance light-scattering. The results show that J-type aggregates of TPPS4 can be produced with two TPPS4 molecules being stacked in the structure of staggering card-deck when the concentration of CTMAB is lower than 1.0×10-5mol•L-1.The J-type aggregates of TPPS4 still exist with a hypsochromic Soret band when the concentration of CTMAB is in the range 1.0×10-5~1.0×10-4mol•L-1.The J-type aggregates, however. disappear with the appearance of the D2h absorption features of free base porphyrin if the concentration of CTMAB is higher than 1.0×10-4mol•L-1Compared with the spectroscopic features of the free base porphyrin in water medium, the Soret band of the free base porphyrin in CTMAB medimn is red-shifted.
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