Thumbnail
Access Restriction
Open

Author Kim, T. ♦ Crooks, R. M. ♦ Tsen, M. ♦ Sun, L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ MATERIALS SCIENCE ♦ THIN FILMS ♦ SYNTHESIS ♦ THIOLS ♦ POLYMERIZATION ♦ POLYACETYLENES ♦ PHOTOCHEMICAL REACTIONS ♦ ULTRAVIOLET RADIATION ♦ VIBRATIONAL STATES ♦ RAMAN SPECTRA ♦ INFRARED SPECTRA ♦ ULTRAVIOLET SPECTRA ♦ VISIBLE SPECTRA
Abstract We report the synthesis and characterization of self-assembled mono- and multilayers of {omega}-functionalized diacetylenic thiols. We used the carboxylic acid-terminated alkanethiol diacetylene HS(CH{sub 2}){sub 10}C=CC=VC(CH{sub 2}){sub 10}-COOH as a block for preparing multilayers. Individual layers are covalently bonded through a thioester linkage. These two orthogonal polymerization steps yield a highly structured three-dimensional, surface-confined polymer. The results of infrared external reflectance spectroscopy and ellipsometry clearly indicate layer-by-layer growth up to at the least 6 layers. The multilayers can be polymerized by UV irradiation either after the deposition of each individual layer or after all layers are deposited. The appearance of bands attributable to C=C vibrational modes in resonance Raman spectra confirms polymerization. Transmission UV-vis spectroscopy indicates the films consist of the highly conjugated blue polydiacetylenic polymer, and that polymerization is complete within 5 min of initial irradiation. 26 refs., 4 figs.
ISSN 00027863
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-04-12
Publisher Department Sandia National Laboratory
Publisher Place United States
Journal Journal of the American Chemical Society
Volume Number 117
Issue Number 14
Organization Sandia National Laboratory


Open content in new tab

   Open content in new tab