NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effect of halogenation on the nonlinear optical properties of porthyrin and substituted porphyrinsThe effect that fluorine and chlorine substitution has on the nonlinear optical properties of porphyrin, tetramethylporphyrin and tetraphenylporphyrin has been theoretically studied. The calculations of nonlinear optical properties have been obtained by performing finite-field calculations on structures determined by semiempirical methods. In addition, tetra(p-chlorophenyl)porphyrin and tetra(p-bromophenyl)porphyrin were synthesized by the condensation of pyrrol and the appropriate aldehyde. Thin films of polymethylmethacrylate were obtained containing these materials, by spin coating onto glass substrates. The films were characterized by third-harmonic generation. It was determined that the experimental conditions enhance the third-order polarizability of the tetraphenylporphyrins by a factor of about 1.6.
Document ID
20000032246
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Cardelino, Beatriz H.
(Spelman Coll. Atlanta, GA United States)
Moore, Craig E.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Benloss, Angela
(Spelman Coll. Atlanta, GA United States)
Thompson, Albert N., Jr.
(Spelman Coll. Atlanta, GA United States)
Richards, Rosalie A.
(Spelman Coll. Atlanta, GA United States)
Roney, Celeste A.
(Spelman Coll. Atlanta, GA United States)
Sanghadasa, Mohan
(Alabama Univ. Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
February 22, 1998
Publication Information
Publication: NASA University Research Centers Technical Advances in Aeronautics, Space Sciences and Technology, Earth Systems Sciences, Global Hydrology, and Education
Volume: s 2 and 3
Subject Category
Optics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available