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101.
Sefik Suzer Ozgur Birer Adnan U. Sevil Olgun Guven 《Monatshefte für Chemie / Chemical Monthly》2001,100(3):185-192
2-Chloro-polyaniline (2-Cl-PANI) in its non-conducting (emeraldine base, EB) form, prepared by a chemical route, was dissolved together with poly-(vinylchloride) (PVC) in THF for casting into thin (10–50 μm) films. Upon exposure to UV radiation, the electrical conductivity of these films increased by more than 4 orders of magnitude (from 10−6 to 10−2S/cm). This is attributed to the dehydrochlorination of PVC by exposure to energetic photons and subsequent doping of 2-Cl-PANI (i.e. conversion to emeraldine salt, ES) by in situ created HCl. The doped films could be returned to their undoped form by exposure to NH3 vapours. The UV-induced doping/NH3 undoping cycles could be repeated several times. Various spectroscopic techniques were employed to follow the changes in the films upon exposure to UV radiation. The same photo-dehydrochlorination process has also been utilized for optical and/or lithographic purposes by preparing PVC blends containing methyl violet, and acid-base indicator dye. The photo-dehydrochlorination can be effectively sensitized by incorporating hydroquinone into the PVC blends containing methyl violet. 相似文献
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T. Kilic Ya. K. Yildiz A. C. Goren G. Tumen G. Topcu 《Chemistry of Natural Compounds》2003,39(5):453-456
Linearol, foliol, epicandicandiol, siderol and ent-7,18-dihydroxy-15,16-epoxykaurane have been investigated for antibacterial activity test. Highest activity of epicandicandiol has been determined against E-coli. 相似文献