Two-dimensional crystallization of phthalocyanine pigments at the air/water interface

被引：16

作者：

Gregory, BW

Vaknin, D ^{[1
]}

Gray, JD

Ocko, BM

Cotton, TM

Struve, WS

机构：

[1] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 03期

关键词：

D O I：

10.1021/jp9836022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-dimensional crystallization of highly planar phthalocyanine (Pc) pigments underneath the headgroups of a lipid Langmuir monolayer was observed and characterized by synchrotron X-ray diffraction at grazing angles of incidence (GID). The crystallization was achieved through spontaneous adsorption of positively charged, water-soluble Pc's to a spread dihexadecyl phosphate (DHDP) monolayer at the air/water interface. Analysis of the GID and rod profiles show that the lipid, pigment, and counterions form a complex in which the pigment plane is tilted with respect to the liquid surface; this is consistent with previous independent X-ray reflectivity investigations. In addition, the two-dimensional crystalline order of DHDP monolayers on pure H2O has been determined and an analysis of its structure both before and after complexation is presented.

引用

页码：502 / 508

页数：7

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