Pressure effects on the intervalence-transfer electronic absorption band of the mixed-valence Creutz-Taube ion in various media

1988 ◽  
Vol 92 (7) ◽  
pp. 1771-1774 ◽  
Author(s):  
William S. Hammack ◽  
Michael D. Lowery ◽  
David N. Hendrickson ◽  
Harry G. Drickamer
Keyword(s):  
Absorption Band ◽  
Electronic Absorption ◽  
Mixed Valence ◽  
Pressure Effects ◽  
Electronic Absorption Band

Pressure effects on the intervalence-transfer electronic-absorption band of the mixed-valence bis(fulvalene)diiron monocation in various media

1987 ◽  
Vol 109 (24) ◽  
pp. 7340-7345 ◽  
Author(s):  
Usha Sinha ◽  
Michael D. Lowery ◽  
William S. Hammack ◽  
David N. Hendrickson ◽  
Harry G. Drickamer
Keyword(s):  
Absorption Band ◽  
Electronic Absorption ◽  
Mixed Valence ◽  
Pressure Effects ◽  
Electronic Absorption Band

The 0.9 eV Absorption Band of Polyaniline: A Morphologically Sensitive Electronic Absorption

1989 ◽  
Vol 173 ◽  
Author(s):  
D. Zhang ◽  
J.-H. Hwang ◽  
S. C. Yang
Keyword(s):  
Absorption Band ◽  
Electronic Absorption ◽  
Transition Energy ◽  
Energy Levels ◽  
Electronic Energy ◽  
Emeraldine Base ◽  
Electronic Systems ◽  
Electrically Conductive ◽  
Electronic Energy Levels ◽  
Electronic Absorption Band

The optical absorption spectra of polyaniline in the visible and UV spectral regions have been characterized before. The electrically conductive form has a band gap absorption at 3.8 eV and polaron absorptions at 2.9 and 1.5 eV [1,2] . An additional electronic absorption band at 0.9 eV was found to be also related to the existence of polaron. The assignment of this transition has yet to be made. Epstein and co-workers [31 have found a photo-induced absorption band at 0.9 eV by photo-exciting emeraldine base (insulator) with 2.0 eV light. It is not known yet whether these two 0.9 eV transitions belong to the same set of electronic energy levels of polaron, or they belong to two different electronic systems but are coincidentally have the same transition energy.

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