D—7r conjugation

Structures, Reactions and Functions of d-d and d-7r Conjugated Systems Editors A. Nakamura, N. Ueyama, and K. Yamaguchi... 

In the second stage an erroneous interpretation of hyperconjugation as an alternative to the d—7r conjugation appeared37 (for more details see Reference 33). However, it led to the realization of the important role of hyperconjugation in organic molecules. 

A type of non-bonded interaction which is often very significant in organometallic compounds is the so-called hyperconjugation , namely a cr-Tt or d r-p 7r conjugation between the n systems of the organic moiety and interaction studied by PES in the following sections. 

FIGURE 1.3. The photoluminescence (PL) and electroluminescence (EL) spectra of some representative 7r-conjugated films and OLEDs, respectively (a) EL of blue aminooxadia-zole fluorene (AODF) and green Alq3 OLEDs,9 (b) PL and EL of PPV films and PLEDs, respectively,10 (c) PL of m-LPPP films, (d) EL of DPVBi (solid line) and DPVBi/Alq3 (dashed line) OLEDs,11 and (e) PL of CBP films and EL of CBP OLEDs.12... 

Figure 1.42. Examples of a wormlike chain, a Chain with a 7r-conjugated backbone [poly(p-phenylene) and polydiacetylene], b Chain with a bulky side chain [poly( -hexyl isocyanate) also helical], c Helical chain (double-stranded DNA). d Polyelectrolyte [poly(styrene sulfonate) ionized in neutral water]. The rigidity is supported by the high density of negative charges on the backbone, (b is from Ref. 7.)...

D. Baeriswyl, D. K. Campbell, and S. Mazumdar, An overview of the theory of 7r-conjugated polymers, in Conducting Polymers (H. Kiess, ed.), Springer-Verlag, Heidelberg, 1992, p. 7. 

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