Daraio M E, Aramendía P F, San Román E A, Braslavsky S E
Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Argentina.
Photochem Photobiol. 1991 Sep;54(3):367-73. doi: 10.1111/j.1751-1097.1991.tb02029.x.
The dimerization of the diamide of zinc-tetracarboxyphthalocyanine was studied spectroscopically in hexadecyltrimethylammonium bromide (CTAB) micelles at surfactant concentrations from 0.026 to 0.1 M and dye concentrations between 0.1 and 10 microM. The apparent dimerization constant in CTAB 0.1 M is 8.6 x 10(5) M-1, while the intramicellar dimerization constant is 1.8 x 10(3). The dimer absorption spectrum was also obtained. Singlet molecular oxygen sensitization was studied by steady state photolysis using 1,3-diphenylisobenzofurane as scavenger in 0.1 M CTAB. The usual sensitization mechanism is extended to include dimer reactions. Singlet molecular oxygen sensitization yields for monomer and dimer in the micelles are 0.7 and 0.1, respectively. With the reported values it is possible to calculate the average yield of singlet molecular oxygen production at any surfactant and dye concentrations.
在十六烷基三甲基溴化铵（CTAB）胶束中，于表面活性剂浓度为0.026至0.1 M且染料浓度介于0.1至10 microM的条件下，通过光谱法研究了四羧基酞菁锌二酰胺的二聚作用。在0.1 M的CTAB中，表观二聚常数为8.6×10⁵ M⁻¹，而胶束内二聚常数为1.8×10³。还获得了二聚体吸收光谱。在0.1 M的CTAB中，以1,3 - 二苯基异苯并呋喃作为清除剂，通过稳态光解研究了单线态分子氧敏化作用。通常的敏化机制得以扩展，以包括二聚体反应。胶束中单体和二聚体的单线态分子氧敏化产率分别为0.7和0.1。利用所报道的值，可以计算出在任何表面活性剂和染料浓度下单线态分子氧产生的平均产率。
