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Diacetylene and Polydiacetylene Derivatives of 2-Methyl-4-Nitroaniline for Second-Harmonic GenerationA novel diacetylene derivative of 2-Methyl-4-NitroAniline (MNA), a well-known material for Second-Harmonic Generation (SHG), is synthesized. This monomer DiAcetylene MethylNitroAniline, (DAMNA) is characterized by means of the Kurtz technique at 1064 nm and is found to have an SHG powder efficiency 62.5 % that of MNA itself. Thin crystalline films of DAMNA are grown onto quartz, Teflon, and Kapton substrates by means of vapor deposition in vacuum. These films are then polymerized in the solid state by exposure to long-wavelength UV radiation to give crystalline polydiacetylene thin films (PDAMNA). The films are next characterized for SHG, using an unpolymerized DAMNA film as a reference. Interestingly, films grown onto Teflon exhibit greater orientation and significantly greater SHG than those grown onto quartz and Kapton. This result is promising in that it demonstrates the potential of PDAMNA as both a crystalline and polymeric material for SHG applications, in which highly oriented thin films are desired. Computational modeling (usingAM1) is also carried out on DAMNA and is compared to the experimental results.
Document ID
19970014813
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Paley, M. S.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Frazier, D. O.
(NASA Marshall Space Flight Center Huntsville, AL United States)
McManus, S. P.
(Alabama Univ. Huntsville, AL United States)
Zutaut, S. E.
(Alabama Univ. Huntsville, AL United States)
Sanghadasa, M.
(Alabama Univ. Huntsville, AL United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Chemistry of Materials
Publisher: American Chemical Society
Volume: 5
Issue: 11
ISSN: 0897-4756
Subject Category
Chemistry And Materials (General)
Report/Patent Number
NAS 1.15:112661
NASA-TM-112661
Accession Number
97N71248
Distribution Limits
Public
Copyright
Public Use Permitted.
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