Two-dimensional crystallization of phthalocyanine pigments at the air/water interface
- Ames Lab., IA (United States). Dept. of Chemistry
- Brookhaven National Lab., Upton, NY (United States). Dept. of Physics
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 H{sub 2}O has been determined and an analysis of its structure both before and after complexation is presented.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 315962
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Vol. 103, Issue 3; Other Information: PBD: 21 Jan 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Amorphous iron-(hydr) oxide networks at liquid/vapor interfaces: In situ X-ray scattering and spectroscopy studies
Ion distributions at charged aqueous surfaces: Synchrotron X-ray scattering studies