Donor/acceptor‐substituted phenylenevinylenes
Source abstract
Abstract
The incorporation of donor/acceptor moieties into poly(p‐phenylenevinylene) has been accomplished by a simple cation–anion coupling reaction. The reaction was used to create a series of oligomers, which were then investigated by dielectric spectroscopy in order to study strong dipole moments along the conjugated chain. The information obtained by this method should elucidate cooperative dipole–dipole interactions and help to improve the poling stability of polymers in nonlinear optical devices.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Nonlinear Optical Materials Research · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (14)
Show source-provided references
1. 10.1002/ange.1995107010510.1002/ange.19951070105 ↗
2. 10.1021/ma00111a04210.1021/ma00111a042 ↗
3. 10.1002/ange.1967079030810.1002/ange.19670790308 ↗
4. The application of ln[E]K‐[Z][E]0K‐[Z]0= ‐(kE→Z + kZ‐→Et) and subsequent linear regression leads to kE‐→Z + +kZ‐→E. With K = kE→ZkZ→E = [Z]Gl[E]Glone obtains values of kE→Z = 0.565±0.226 × 10−4and kZ→E = 0.735±0.294 × 10−4. ΔG≠has been calculated for kE→Z.
5. 10.1021/ja00007a04210.1021/ja00007a042 ↗
6. Bond lengths C7C8= 1.378±0.004 Å; C1C7= 1.478±0.004 Å; N1C15= 1.147±0.004 Å N2C8= 1.362±0.003 Å C7C15= 1.436±0.004 Å; C8C9= 1.493±0.004 Å; 5a crystallizes in a monoclinic unit cell that belongs to the centrosymmetric space group P2/n.
7. 10.1016/0379-6779(92)90331-C10.1016/0379-6779(92)90331-C ↗
8. 10.1038/347539a010.1038/347539a0 ↗
9. 10.1016/0379-6779(92)90291-P10.1016/0379-6779(92)90291-P ↗
10. 10.1126/science.269.5227.108610.1126/science.269.5227.1086 ↗
11. For sufficiently polar molecules one obtains the dipole moment by means of the Guggenheim approximation for the realistic case discussed here ∂n2/∂w2≈ 0: μ2= 27 ϵokT M2v1NA−1(ϵ1+ 2)−2(∂ϵ/∂w2‐∂n2/∂w2) (ϵ0is the influence constant M2the mole weight of the corresponding oligomer ν1is the specific volume of the solvent ϵlis the static dielectric constant w2is the weight fraction). The data obtained for (ϵw2) are linear in w2and an extrapolation w2→0 for the five series of measurements gives s = 2.340±0.001 in very good agreement with ϵ1= 2.340 for pure toluene.
12. R.Richert D.Neher S.Stadler K.Meerholz C.Bräuchle G.Klärner C.Former K.Müllen unpublished work.
13. 10.1002/ange.1995107131810.1002/ange.19951071318 ↗
14. 10.1002/anie.19951485110.1002/anie.199514851 ↗