Alkyl chain length effects on the photoionization of N-alkylphenothiazines and sulfonated alkylphenothiazines in anionic alkyl sulfate and cationic alkyltrimethylammonium bromide micelles
作者:Young Soo Kang、Piero Baglioni、Hugh J. D. McManus、Larry Kevan
DOI:10.1021/j100173a071
日期:1991.10
The photoionization yields of N-alkylphenothiazines solubilized in either cationic or anionic micelles at 77 K were studied as a function of both alkyl and surfactant chain length. The results are compared to similar work on sulfonated N-alkylphenothiazines. The location of the phenothiazine moiety with respect to the micelle-water interface together with cation-water interactions is a major factor controlling the photoionization efficiency. The position of the N-alkylphenothiazine chromophore within a micelle can be altered by changing the alkyl chain length. The photoefficiency is also affected by the surface charge of the micelle.
Functionalized Phenothiazine and Carbazole Chromophores: Synthesis and Characterization
Synthesis, characterization, and photophysical properties for a few optical chromophores are reported. Phenothiazine and carbazole units played an important role to contribute high electron donability and connect the resonance pathway via conjugate effect in the cyclized ring besides the aromatic ring. Theoretical calculations and an absorption spectroscopic study gave useful information about the energy states and structures of chromophores.