Issue 22, 2005

Self-organization of a sulfonamido-porphyrin in Langmuir monolayers and Langmuir–Blodgett films

Abstract

Langmuir monolayers (LM) and Langmuir–Blodgett (LB) films of pure lipophilic meso-tetra(4-dodecylaminosulfophenyl)porphyrin (PC12) and mixed with the anionic surfactant sodium hexadecylsulfate (SHS) were studied. The molecular packing and structure of PC12 and PC12-4SHS with variable surface pressure were investigated by surface pressure–area measurements, steady-state absorption, fluorescence emission and anisotropy, as well as by fluorescence lifetime imaging microscopy (FLIM). At low surface pressure, the porphyrin molecules are organized with the rings tilted on the water surface whereas at high surface pressure the porphyrin rings achieve a more perpendicular arrangement. Using the FLIM images a gradual change of aggregates into large “islands” is observed. Different patterns are observed in the pure PC12 multilayer films (n = 3 and 5) with ordered patches superimposed which are not observed in the PC12-4SHS multilayer LB films.

Graphical abstract: Self-organization of a sulfonamido-porphyrin in Langmuir monolayers and Langmuir–Blodgett films

Article information

Article type
Paper
Submitted
09 May 2005
Accepted
30 Aug 2005
First published
15 Sep 2005

Phys. Chem. Chem. Phys., 2005,7, 3874-3883

Self-organization of a sulfonamido-porphyrin in Langmuir monolayers and Langmuir–Blodgett films

D. M. Togashi, R. I. S. Romão, A. M. Gonçalves da Silva, A. J. F. N. Sobral and S. M. B. Costa, Phys. Chem. Chem. Phys., 2005, 7, 3874 DOI: 10.1039/B506442B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements