title: Monolayer Behavior of Tetraphenylporphyrin Derivatives Containing Four Fluorocarbon Chains and Optical Properties of Their Monolayer Assemblies.
abstract: For tetraphenylporphyrin derivatives substituted with four fluorocarbon chains (TFPP), monolayers on the water surface were studied with the Brewster angle microscope together with pressure-area curves. It was found that heterogeneous aggregated structures of the monolayers were dependent upon the chain length of fluorocarbons, the metal-free or Mn-TFPP, and the periods after spreading. Polarized UV-visible spectra for the monolayer assemblies indicated that the porphyrin rings in the films were tilted on the average, but had a tendency to adopt an orientation more parallel to the water surface as the chain length of the fluorocarbon increased. The third-order nonlinear optical susceptibility for the monolayer assembly of TFPP with the shorter chains was found to be 7.0 x 10(-13) esu, and those of Mn-TFPP were enlarged. Copyright 1998 Academic Press.
authors.affiliation: Faculty of Science, Saitama University, Urawa, 338-8570, Japan
authors.initials: H
authors.lastname: Nakahara
authors.initials: W
authors.lastname: Liang
authors.initials: K
authors.lastname: Fukuda
authors.initials: L
authors.lastname: Wang
authors.initials: T
authors.lastname: Wada
authors.initials: H
authors.lastname: Sasabe