Sökning: "trans-cis isomerization"

Hittade 3 avhandlingar innehållade orden trans-cis isomerization.

  1. 1. Synthesis and photochemical properties of cis-trans isomeric 1,2-di(9-phenanthryl)ethylene and 9- phenanthrylpropenones

    Författare :Annika Vannerberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phenanthrene; 2-Di 9-phenatryl ethylene; 9-phenanthryacetalehyde; 10-dihydrophenanthrene; 9-phenanthraldehyde; trans-9-phenanthrylpropene; reduction with LiAlH4< sub>; cis-1; cycloaddition; 9-hydromethyl-10- 9-phenathrylmethyl -9; trans-cis isomerization; dehydrocyclization;

    Sammanfattning : .... LÄS MER

  3. 2. Thermal Isomerization of Azobenzene Side Chain Copolymers

    Författare :Viktoria Skeppstedt; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; free volume; thermal isomerization; positron annihilation lifetime spectroscopy; physical ageing; phthalate; methyl methacrylate polymer; azo polymers; plasticization;

    Sammanfattning : Irradiation of azobenzene induces isomerization between its trans- and cis forms. By introduction of azobenzene chromophores in polymers, it is possible to optically control a variety of polymer properties. The isomerization of azobenzene can be used to influence conformational, optical or surface properties of the poly mer material. LÄS MER

  4. 3. Fluorescence correlation spectroscopy, photophysical aspects and applications

    Författare :Jerker Widengren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Fluorescence correlation spectroscopy (FCS) is a technique where dynamic processes on the molecular level are studied by the use of fluorescence. The molecules are excited within a focused stationary laser beam and the resulting fluorescence fluctuations are analyzed in the form of an autocorrelation function. LÄS MER