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Electronic spectroscopy bithiophene

Ultraviolet photoelectron spectroscopy (UPS) has been used to study the evolution of the valence electronic states as a function of conjugation length for thiophene, bithiophene, terthiophene, and sexithiophene films deposited in vacuum on gold substrates at 130 K. [Pg.685]

In 1995, Swager et al. synthesized the first calixarene-coupled diiodinated bithiophene, which afforded copolymer 2.166 (Chart 1.36) by Stille-type cross-coupling with distannylated 3,3 -bis(methoxyethoxy) bithiophene [263]. Selective recognition of Na+ ions was studied by UV-Vis spectroscopy and cyclic voltammetry. After addition of 0.5 mMNa+, cyclic voltammetric measurements showed a positive shift of the oxidation potential of about -1-100 mV with a simultaneous dramatic decrease in conductivity. This finding was attributed to an electrostatic effect of the Na+ ions and reduced electron-donating ability of the sodium bound oxygen atoms of the calixarene. [Pg.53]

See other pages where Electronic spectroscopy bithiophene is mentioned: [Pg.184]    [Pg.92]    [Pg.57]    [Pg.12]    [Pg.248]    [Pg.130]    [Pg.786]    [Pg.4049]    [Pg.35]    [Pg.36]    [Pg.375]    [Pg.270]    [Pg.279]    [Pg.70]    [Pg.462]    [Pg.379]   
See also in sourсe #XX -- [ Pg.269 , Pg.270 , Pg.271 , Pg.272 , Pg.273 , Pg.274 , Pg.275 ]



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2,2 -Bithiophene spectroscopy

2,2 -Bithiophenes

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