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Surface‐enhanced Raman spectra of langmuir–blodgett monolayers of (hexadecamethyltetralino) porphyrazines
Author(s) -
Souto J.,
Aroca R.,
Desaja J. A.
Publication year - 1994
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250250610
Subject(s) - monolayer , langmuir–blodgett film , raman spectroscopy , analytical chemistry (journal) , langmuir , porphyrazine , absorption spectroscopy , materials science , metal , spectral line , absorption (acoustics) , surface pressure , chemistry , nanotechnology , optics , polymer chemistry , organic chemistry , adsorption , composite material , physics , astronomy , mechanics
Langmuir monolayers of metal‐free tetra(1,1,4,4‐tetramethyl‐6,7‐tetralino) porphyrazine (HDMTLPH 2 ) and its copper complex (HDMTLPCu) were formed on a water subphase. The surface pressure‐area isotherms were measured and the floating monolayers were transferred to various substrates. The spectra of Langmuir‐Blodgett (LB) films deposited on metal surfaces were studied. Surface‐enhanced Raman spectra of a single LB monolayer of HDMTLPH 2 and HDMTLPCu deposited on rough surfaces (silver‐coated tin spheres and island films of silver and gold) are reported. Reflection absorption Fourier transform IR spectra of LB films on smooth silver are also presented. The spectroscopic characterization includes the UV‐visible spectra of multilayer films on glass slides, solutions and the bulk materials. Characteristic vibrational wavenumbers are listed and used to discuss molecular orientation in the LB assemblies.