Benzofuran-terminated infrared dyes and their electro-optic properties in guest–host polymers

✍ Scribed by Andrew P. Chafin; Matthew C. Davis; William W. Lai; Geoffrey A. Lindsay; Dong H. Park; Warren N. Herman

• Book ID: 103877002
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 825 KB
• Volume: 33
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2011.03.004

✦ Synopsis

Molecular first hyperpolarizabilities and dipole moments of new benzo-fused dyes were calculated using quantum-mechanical density functional theory (DFT). Two new infrared dyes were synthesized: each one was terminated with 6-diethylaminobenzo[b]furan on one end, and with CF 3 -tricyanodihydrofuran on the other end. The midsection of the p-electron framework for one dye contained a morpholinosubstituted cyclohexenylene unit, and the other dye contained an ethoxysiloxane-substituted cyclohexenylene unit. Guest-host films were deposited on ITO-glass and contact poled. Electro-optic coefficients (r 33 ) were measured at a wavelength of 1550 nm by the attenuated total reflection method and by a modified simple Teng-Man reflection method. The measured values of r 33 were compared with values estimated from a well-known model that employs the molecular properties of the dyes and the film poling parameters. Thermal stability and electronic absorption spectra of the dyes were measured.