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Violene/Cyanine Hybrids: A General Structure for Electrochromic Systems

✍ Scribed by Siegfried Hünig; Martina Kemmer; Hermann Wenner; Igor F. Perepichka; Peter Bäuerle; Andreas Emge; Georg Gescheid

Book ID
101304973
Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
194 KB
Volume
5
Category
Article
ISSN
0947-6539

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✦ Synopsis

Organic electrochromics are mainly based on two-step redox systems of the violene type, in which radical ions represent the long-wavelength-absorbing species. Since closed-shell systems are expected to be more persistent a new structural principle is developed that contains both the violene and the cyanine type. The latter provides the colored species. The scope of this new and general principle is demonstrated by several examples with oxidation levels ranging from À 4 bis 4.

📜 SIMILAR VOLUMES

Violene/Cyanine Hybrids as Electrochromi
Violene/Cyanine Hybrids as Electrochromic Systems: A New Variation of the General Structure
✍ Siegfried Hünig; Anja Langels; Michael Schmittel; Hermann Wenner; Igor F. Perepi 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 533 KB

The recently disclosed general structure of violene/cyanine hybrids is extended to a new variant. The groups X and Y complete the structure for cyanines, oxonols or merocyanines in the formula (Scheme 2, at the right side). Therefore, both the addition and removal of two electrons is possible. To te