Accession Number:

ADA379040

Title:

Azulenic Chromophores and Polymers for Optical Limiting and Other Nonlinear Optical Applications

Descriptive Note:

Final rept.

Corporate Author:

HAWAII UNIV HONOLULU DEPT OF CHEMISTRY

Personal Author(s):

• Esato, Alfred E.
• Liu, Robert S.
• Wang, Xue-Song
• Watanable, Dana

Report Date:

2000-01-28

Pagination or Media Count:

21.0

Abstract:

A series of new symmetrical 1,3-disubstituted azulene derivatives were prepared for examination of their two-photon absorption and optical limiting properties. Several structurally modified azulenic polymethine dyes, previously identified as reverse saturable absorbers and optical limiters, were also. prepared. Synthetic protocols were devised to covalently attach a number of azulenic NLO chromophores to polymer hosts. A completely unexpected nonequivalence was observed for one of the NMR signals for symmetrical polymethine dye 13c at low-temperature. The measurement of electronic properties dipole moments polarizabilities, and hyperpolarizabilities of a series of fluorinated azulenic azobenzenes is being undertaken using electroabsorption Stark spectroscopy.

Descriptors:

• *AZULENES
• *OPTICAL LIMITERS
• CHROMOPHORES
• NONLINEAR OPTICS
• TWO PHOTON ABSORPTION
• AZOBENZENES

Subject Categories:

• Polymer Chemistry
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE