Electrochromic and gas adsorption properties of Langmuir-Blodgett films of lutetium bisphthalocyanine complexes

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00031a010· OSTI ID:5042793

Rodriguez-Mendez, M L; Aroca, R ^[1]; DeSaja, J A ^[2]

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1. Univ. of Windsor, Ontario (Canada)
2. Univ. of Valladolid (Spain)

The electrochromic behaviour, spectroscopic properties and gas chemisorption of ultra thin films of lutetium octa-4-phenyldiphthalocyanine (LuPc[sub 2][sup Ph]), and the lutetium octa-3-bromo-octa-5-tert-butylphthalocyanine (LuPc[sub 2][sup tBr]) are reported. Electrochromism was observed for Langmuir-Blodgett (LB) and films cast onto indium tin oxide (ITO) coated glass electrodes in aqueous KClO[sub 4] solution. Mixed LB films supported on ITO glass electrodes were more stable to repetitive cycling than cast films. Films of LuPc[sub 2][sup Ph] and LuPc[sub 2][sup tBr] were sensitive to electron-acceptor gases as observed by the changes in the electronic absorption spectra and the surface-enhanced resonance Raman scattering (SERRS) spectra. The presence of electron-withdrawing bromine atoms in the phthalocyanine ring increased the rate of desorption for chemisorbed electron-acceptor molecules. 10 refs., 8 figs., 3 tabs.

• OSTI ID: 5042793
• Journal Information: Chemistry of Materials; (United States), Vol. 5:7; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LUTETIUM COMPLEXES
ABSORPTION SPECTROSCOPY
ELECTROCHROMISM
SORPTIVE PROPERTIES
CATALYST SUPPORTS
PHTHALOCYANINES
RAMAN SPECTROSCOPY
COMPLEXES
DYES
ELECTRO-OPTICAL EFFECTS
HETEROCYCLIC COMPOUNDS
LASER SPECTROSCOPY
ORGANIC COMPOUNDS
RARE EARTH COMPLEXES
SPECTROSCOPY
SURFACE PROPERTIES
360606* - Other Materials- Physical Properties- (1992-)
400400 - Electrochemistry