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Surface-enhanced Raman spectra of langmuir–blodgett monolayers of (hexadecamethyltetralino) porphyrazines

✍ Scribed by J. Souto; R. Aroca; J. A. Desaja

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
504 KB
Volume
25
Category
Article
ISSN
0377-0486

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✦ Synopsis

Abstract

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.

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