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The correlations between stimulated Brillouin scattering (SBS) characteristics of perfluoro-compound (PFC) and perfluoropolyether (PFPE) and their chemical structure are analyzed in detail and a series of new PFC and PFPE are reported. In the Nd:YAG laser system, the absorption coefficient, optical breakdown threshold (OBT), SBS threshold, and Brillouin frequency shift of new media such as FC-87, FC-43, HT-55, and DET are measured. Parameters such as gain coefficient, Brillouin linewidth, and phonon lifetime are calculated. The results demonstrate their good SBS properties: the absorption coefficients are below [10.sup.-3][cm.sup.-1] and OBTs are above 100 GW/[cm.sup.2]. These media also exhibit a series of unique physicochemical properties, i.e., high heat-resistance, high oxidation stability, good chemical inertness, and insulation properties. The discovery of new media not only diversifies SBS medium, but also improves the performance of the SBS system, thereby laying a good foundation for the application of a SBS phase conjugation mirror in a high-power laser system. OCIS codes: 190.0190, 290.5830, 190.2640.

The investigation of the circular differential transmission in thick films of poly{9.9-bis[(3S)-3,7-dimethyloctyl}-2,7-fluorene} is presented. A specifically designed chiroptical setup is used to show that the circular selective reflection of light, in which the circular polarization of the light is retained after reflection, makes a negligible contribution to the differential transmission.

The reactivity of intrazeolite photooxidations can be enhanced by a singlet oxygen friendly environment, where the quenching processes are slowed down and the [super 1][O.sub.2] lifetime is increased. The doping of zeolite with fluoroorganic cation has resulted in an increase in the singlet oxygen lifetime at 12 [micro]s.

The synthesis and characterization of 2,3,5,6-tetrafluorophenylnitren-4-yl in argon at 4 K via the photolysis of 2,3,5,6-tetrafluoro-4-iodo-phenyl azide is presented. The quartet ground state of 2,3,5,6-tetrafluorophenylnitren-4-yl is found to show high-spin quartet state but no low-spin doublet state.

The development of new method to synthesize perfluoro[2.2]paracyclophane from reaction of 1,4-bis(chlorodifluoromethyl)-2,3,5,6-tetrafluorobenzene with Zn, heated in acetonitrile at 100 degree Celsius is reported. The study demonstrates the application of Perfluoro[2.2]paracyclophane for deposition experiments to determine the impact of perfluorination on properties of the respective parylene polymer.

The design and synthesis of two novel fluorine-boron cored fluorescent complexes are described. These complexes have exhibited well-ordered molecular packing, intense fluorescence and low LUMO levels, which are useful as electron-transport materials in electroluminescent (EL) devices.

Several spectroscopic studies are conducted to explain the interplay between the on-chain keto defect and the interchain interaction its impact on the green and blue emission of polyflourene (PF). The analysis reveals that the interaction leads to severe color degradation, which then minimizes the green emission.

The synthesis of a small molecule 4,7-di-2-thienyl-2,1,3-benzothiadiazole (DBT) dye is carried out which is further blended into blue-emitting polyfluorene as a host. The role of intra-and interpolymer chain interaction and energy transfer in the polymer light emitting devices are discussed.

A stereoselective synthesis of an all-syn four vicinal fluorine motif as a single enantiomer is described in a format, which will allow its direct incorporation into larger molecular architectures. Such a motif has potential for a variety of applications in the design of novel materials such as liquid crystals and self-assembling monolayers or in the synthesis of elaborate deoxyfluoro sugar analogues and broadens the available range of functionalized alkanes.

The pressure dependence of recombination reaction between Cl + FC(O)O + M --> FC(O)OCl + M is investigated at 296 K. It is determined that the reactions are expected to have a negligible impact on stratospheric ozone levels.

Spherical calcium dioleate particles were used as AFM (atomic force microscope) probes to measure interaction forces of the collector colloid with calcite and fluorite surfaces. The AFM force between the calcium dioleate sphere and the mineral surfaces does not agree with the Derjaquin-Landau-Verwet-Overbeek (DLVO) prediction.

The first attempt of using doubly ortholinked quinoxaline/triarylamine 1:1 hybrid as a bifuctional, dipolar electrolumonecent clip is unraveled for bluish green and orange organic light emitting diodes applications. The 1:1 hybrid is potentially bipolar and may act as a central fluorescent of the C5- and C8-appendages.