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Title: Molecular Architectural Approach to Novel Electro-Optical Materials

Abstract

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The goal is to construct polar multilayers with nonlinear optical coefficients larger than classical inorganic crystals such as KDP or quartz. The strategy is to use various chemical interactions such as covalent bonds or hydrogen bonding to build polar structures. We have synthesized novel barbituric acid and melamine derivatives that will spontaneously self-assemble into a supramolecular ribbon according to their complementary H-bond motif. This supramolecular ribbon can then stack into a polar multilayer structure as verified by sum frequency generation (w{sub 1}+w{sub 2}) or second harmonic generation (when w{sub 1}=w{sub 2}). Second harmonic generation yields a value of d{sub 33}=3.2 pm/V for the self-assembled films and sum frequency generation shows a net polar orientation of the methyl groups in the multilayer along the surface normal. X-ray diffraction confirms the layered structure and produces the periodicity of {approximately}41 A, which corresponds well to the width of the supramolecular ribbons ({approximately}40 A).

Authors:
; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
M& A (US)
OSTI Identifier:
763892
Report Number(s):
LA-UR-99-2683
TRN: AH200102%%302
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 29 Jun 1999
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 36 MATERIALS SCIENCE; BARBITURATES; BONDING; HARMONIC GENERATION; HYDROGEN; LANL; MELAMINE; ORIENTATION; QUARTZ; VARIATIONS; X-RAY DIFFRACTION

Citation Formats

Li, D., Johal, M.S., Smilowitz, L.B., and Robinson, J.M. Molecular Architectural Approach to Novel Electro-Optical Materials. United States: N. p., 1999. Web. doi:10.2172/763892.
Li, D., Johal, M.S., Smilowitz, L.B., & Robinson, J.M. Molecular Architectural Approach to Novel Electro-Optical Materials. United States. doi:10.2172/763892.
Li, D., Johal, M.S., Smilowitz, L.B., and Robinson, J.M. Tue . "Molecular Architectural Approach to Novel Electro-Optical Materials". United States. doi:10.2172/763892. https://www.osti.gov/servlets/purl/763892.
@article{osti_763892,
title = {Molecular Architectural Approach to Novel Electro-Optical Materials},
author = {Li, D. and Johal, M.S. and Smilowitz, L.B. and Robinson, J.M.},
abstractNote = {This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The goal is to construct polar multilayers with nonlinear optical coefficients larger than classical inorganic crystals such as KDP or quartz. The strategy is to use various chemical interactions such as covalent bonds or hydrogen bonding to build polar structures. We have synthesized novel barbituric acid and melamine derivatives that will spontaneously self-assemble into a supramolecular ribbon according to their complementary H-bond motif. This supramolecular ribbon can then stack into a polar multilayer structure as verified by sum frequency generation (w{sub 1}+w{sub 2}) or second harmonic generation (when w{sub 1}=w{sub 2}). Second harmonic generation yields a value of d{sub 33}=3.2 pm/V for the self-assembled films and sum frequency generation shows a net polar orientation of the methyl groups in the multilayer along the surface normal. X-ray diffraction confirms the layered structure and produces the periodicity of {approximately}41 A, which corresponds well to the width of the supramolecular ribbons ({approximately}40 A).},
doi = {10.2172/763892},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 29 00:00:00 EDT 1999},
month = {Tue Jun 29 00:00:00 EDT 1999}
}

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