Studies of Langmuir and Langmuir–Blodgett films of NLO-active amphiphilic 1,3-indanedione derivatives

Autor:	Zvi Kotler, Jacob T. Klug, Gerry Berkovic, Vladimir Khodorkovsky, Pnina Krief, Shlomo Efrima, Somobrata Acharya
Rok vydání:	2005
Předmět:	Contact angle Langmuir Chemistry Amphiphile Materials Chemistry Analytical chemistry Second-harmonic generation General Chemistry Absorption (chemistry) Layer (electronics) Langmuir–Blodgett film Catalysis Fluorescence spectroscopy
Zdroj:	New Journal of Chemistry. 29:1049
ISSN:	1369-9261 1144-0546
DOI:	10.1039/b504445f
Popis:	We studied Langmuir and Langmuir–Blodgett (LB) films of several strong nonlinear optical (NLO) active amphiphilic derivatives of 1,3-indanedione-5,6-dicarboxylic acid. The surface pressure–area (π–A) isotherms at the air–water interface were investigated at different temperatures and pH values. Non-centrosymmetric Z-type LB films were deposited. UV–visible spectra indicated a uniform film transfer. The orientation of the molecular transition moments was calculated from the polarized UV–visible spectra. Packing within the LB films was observed by UV–visible absorption and fluorescence spectroscopy. The morphology of the LB films was examined by AFM and compared to ellipsometric measurements, and the nature of the films was studied by contact angle measurements. Significant second harmonic generation (SHG) by the LB films was observed. Alternate layer Y-type LB films of two different dyes were fabricated to achieve enhanced stability and SHG.
Databáze:	OpenAIRE
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