title: Spectroscopic characterization and Langmuir-Blodgett films of a novel azopolymer material.
abstract: Spectroscopic characterization and fabrication of Langmuir and Langmuir-Blodgett (LB) films of an azopolymer-pyridine (PAzPy) are reported. UV-visible absorption and fluorescence spectra, Fourier transform infrared (FTIR) spectra, and Raman spectra were recorded. The vibrational assignment of the observed spectra is supported by a complete geometry optimization, followed by vibrational frequency and intensity computations of both the trans and cis forms of the monomer (AzPy) using density functional theory at the B3LYP 6-31G(d,p) level of theory. Langmuir monolayers of the polymer (PAzPy) were formed at the water-air interface, and LB films of high quality were formed onto solid substrates. The polymer LB films were investigated by surface-enhanced Raman scattering.
authors.affiliation: Departamento de Química OrgAnica-Química Física, Facultad de Ciencias, Plaza de San Francisco, Ciudad Universitaria, 50009 Zaragoza, Spain.
authors.forename: Marta
authors.initials: M
authors.lastname: Haro
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Ross
authors.forename: Luís
authors.initials: L
authors.lastname: Oriol
authors.forename: Ignacio
authors.initials: I
authors.lastname: Gascón
authors.forename: Pilar
authors.initials: P
authors.lastname: Cea
authors.forename: Maria Carmen
authors.initials: MC
authors.lastname: López
authors.forename: Ricardo F
authors.initials: RF
authors.lastname: Aroca