Poly-9-BCMU

Using this model and E, values from linear optical absorption and THG measurements (Messier (1989))f Charra and Nunzi (1989)) have determined from optical Stark effect measurements on poly- BCMU blue and red gels the ratio of dipolar transition moments follows that... 

R -(CHa-) 4-O-C-NH-CH2C00(CH2) 3CH3 Poly-4-BCMU 585 nm DFWM 4.OxlO 10 red form (ref. 15)... 

A growing number of reports are appearxng concerning %<3) of materials as determined by THG experiments. Among organics a variety of poly(diacetylenes), e. g., 4-BCMU (4-butoxycarbonylmethylurethane polydiacetylene) (15,109) have been studied as pure materials and as LB films, 110) Crystalline films of poly(4-BCMU) in the red form, were found to have higher %<3) than amorphous films, attributed to the orientational effect of crystallization.(109) The blue form also has been studied. 111) Maximum values of %<3) reported to date are 1 x 10 10 esu at 1.3 l. Poly (phenylacetylene) THG at 1.06 lhas recently been measured. 111) The 2- and 3-photon resonance enhanced value of %<3) determined is 7 x 10 12 esu. 

Near resonant z-scan studies provide both nonlinear refractive coefficients, ni, and two photon absorption coefficients, p. Results for a selection of PDAs in solution at 532 nm are given in Table 1. Diethylamino-PDA (lid) and the related quatemized polymer (15a) show comparable magnitudes of nonlinear absorption and refraction to those of poly-4-BCMU, with figures of merit, T, which satisfy the requirement for nonlinear optical switching devices. The metal-containing PDAs... 

J. E. Biegajski, R. Burzynski, D. A. Cadenhead, and P. N. Prasad, Molecular weight and comparative studies of Poly-3- and Poly-4-BCMU monolayers and mutilayers, Macromo/ecK/es 19 1059 (1986). 

Previous characterization studies gave information on both L and the degree of polydispersity for the soluble polydiacetylenes with BCMU side groups. For poly-4BCMU, L 2400... 

Scattering and Scattering Losses of PTS and Poly(4-BCMU) Thin Film Waveguides in the Near Infrared", J. Opt. Soc. Am., B6, 726-732. 

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