Synthesis, photophysical and photochemical properties of oxazolone derivatives

Acyloxyphenyl derivatives of oxazolone, which have tree photo active centers, were synthesized and their physicochemical properties are determined by NMR, absorption, fluorescence excitation and emission spectroscopies. The semi-empirical calculations carried out according with the theory of the PM3/Cl level has shown, that at an irradiating of their solutions by UV-light give no possibilities of the photo-Fries reaction. The calculated values are in a good accordance with the experimental ones

Set in Stone: Building America's New Generation of Arts Facilities, 1994-2008

In 2007, just before the domestic economy experienced a major trauma, the Cultural Policy Center at the Harris School and NORC at the University of Chicago launched a national study of cultural building in the United States. It was motivated by multiple requests from leading consultants in the cultural sector who found themselves involved in a steadily growing number of major building projects -- museums, performing arts centers (PACs), and theaters -- and from foundation officers who were frequently asked to help fund these infrastructure projects. With the generous support of the Andrew W. Mellon Foundation, the Kresge Foundation, and the John D. and Catherine T. MacArthur Foundation, we were able to conduct systematic scientific research on cultural building in the United States between 1994 and 2008 and come to a number of conclusions that have important implications for the cultural sector

Thermal Decomposition of the Bromine Containing Oxyphenylimides

The new bromine containing oxyphenylimides are synthesized by Diels-Alder condensation from commercial products. The effect of brominating of oxyphenylimides on their thermal stability on air is assessed by dynamic thermogravimetric analysis. The possible routes of thermal decomposition of the brominated oxyphenylimides are researched with the help of thermal desorption analysis coupled with mass spectrometry and 1H NMR spectroscopy

Polymers with different azobenzene moiety for NLO application

Date du colloque&nbsp;: 06/2010</p

Nonlinear optical properties of thiazolidinone derivatives

Thiazolidinone derivatives were synthesized and their physicochemical properties are determined by absorption, H NMR spectroscopies. The third order nonlinear optical properties of thiazolidinone containing compounds were investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm

Third-order nonlinear optical response of push-pull azobenzene polymers

The nonlinear optical response of a series of azo-containing side-chain polymers is investigated using Z-scan technique, employing 35 ps and 4 ns laser pulses, at 532 nm. The systems were found to exhibit strong nonlinear optical response, dominated by nonlinear refraction. In all cases, the nonlinear absorption and refraction have been determined and are compared with those of disperse red 1 considered as reference. The corresponding third-order susceptibilities chi((3)) were determined to be as large as 10 (7) and 10 (5) esu under ps and ns laser excitation, respectively. Finally, the results are discussed and compared with other reported data

New Methacrylic Oxazolone and Thiazolidinone Containing Polymers for Nonlinear OpticalApplications

Oxazalone and thiazolidinone derivatives were synthesized and their physicochemical properties are determined by absorption, HNMR spectroscopies. The third order nonlinear optical properties of oxazolone and thiazolidinone containing compounds were investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm