Alcohol chain length and mole fraction dependence of the stability of tetrakis(cumlylphenoxy) phthalocyanine and alcohol Langmuir films

被引：9

作者：

Baker, SM ^{[1
]}

Danzer, J ^{[1
]}

Desaire, H ^{[1
]}

Credo, G ^{[1
]}

Flitton, R ^{[1
]}

机构：

[1] Harvey Mudd Coll, Dept Chem, Claremont, CA 91711 USA

来源：

LANGMUIR | 1998年 / 14卷 / 18期

关键词：

D O I：

10.1021/la971217i

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

While it has been known for about 10 years that octadecanol stabilizes Langmuir-Blodgett films of copper tetrakis(cumylphenoxy)phthalocyanine films, the mechanism for this stabilization is not fully understood. To understand more completely the molecular interactions responsible for making octadecanol a good transfer promoter, we studied mixed films' isotherms of tetrakis(cumylphenoxy)phthalocyanine and various saturated alcohols ranging in length from 13 to 24 carbons. By varying mole fraction and alcohol chain length in the Various mixed films, a model of interaction was deduced based on pressure-versus-area isotherms obtained from a Langmuir trough. In this model, the aliphatic chains of the alcohols act as a stabilizing, hydrophobic support around phthalocyanine mounds of a preferred stack height. As film pressure increases, the mounds are forced above the alcohol sea, removing favorable ether-water interactions. Depending on chain length, a single or double collapse is observed, suggesting an adjustable physical barrier to forcing the stacks above the alcohols.

引用

页码：5267 / 5273

页数：7

共 14 条

[1] MORPHOLOGY AND PROPERTIES OF LANGMUIR FILMS CONTAINING TETRAKIS(CUMYLPHENOXY) PHTHALOCYANINES [J].