Langmuir–Blodgett films of a new hemicyanine dye

We report on Langmuir–Blodgett (LB) characterization of 1-( N-ethyl-1-sulphonate-4-pyridinio)-2-[ N–( n–hexadecyl)pyrrol–2–yl]ethene (C 16H 33-ESPPE). Surface pressure-area isotherms of spread monolayers were investigated at pure water/air interface; LB films were characterized by means of UV-vis an...

Full description

Saved in:
Bibliographic Details
Published in:Thin solid films 1999-09, Vol.353 (1), p.214-217
Main Authors: Ricceri, Riccardo, Gabrielli, Gabriella
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Hemicyanine
Langmuir blodgett films
Monolayers
Optical properties
Surface physical chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report on Langmuir–Blodgett (LB) characterization of 1-( N-ethyl-1-sulphonate-4-pyridinio)-2-[ N–( n–hexadecyl)pyrrol–2–yl]ethene (C 16H 33-ESPPE). Surface pressure-area isotherms of spread monolayers were investigated at pure water/air interface; LB films were characterized by means of UV-vis and steady state fluorescence spectroscopies. The compound is photobleachable and undergoes a dimerization reaction in monolayer and in solution, the strong absorbing band due to a π→ π * transition in the visible region disappears by exposing the compound to visible light. A blue shift of this band in LB films with respect to the solution is attributed to a deck-of-cards packing of the chromophore in the film. The photobleachable absorption band could have potential applications in optical data storage; the molecule could also be very interesting for two-photon pumped (TPP) frequency-upconversion lasing applications.
ISSN:0040-6090
1879-2731
DOI:10.1016/S0040-6090(99)00414-9