Defined‐length Carbon‐rich Conjugated Oligomers

Meier, Herbert

doi:10.1002/3527607994.ch11

Cited by 7 publications

(4 citation statements)

References 138 publications

(224 reference statements)

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“…Because of their interesting electrical, optical and optoelectronic properties, conjugated oligomers represent target compounds for many applications in materials science [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Moreover, they are model compounds for the corresponding polymers.…”

Section: Introductionmentioning

confidence: 99%

“…The synthetic approach to the star-shaped conjugated oligomers CA m comprises convergent and divergent strategies, protecting group techniques and orthogonal techniques-like in the other classes of conjugated oligomers [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Most important are catalyzed CC coupling reactions, such as Heck, Sonogashira or Suzuki reactions.…”

Section: Introductionmentioning

confidence: 99%

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Star-Shaped Conjugated Systems

2010

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The present review deals with the preparation and the properties of star-shaped conjugated compounds. Three, four or six conjugated arms are attached to cross-conjugated cores, which consist of single atoms (B, C+, N), benzene or azine rings or polycyclic ring systems, as for example triphenylene or tristriazolotriazine. Many of these shape-persistent [n]star compounds tend to π-stacking and self-organization, and exhibit interesting properties in materials science: Linear and non-linear optics, electrical conductivity, electroluminescence, formation of liquid crystalline phases, etc.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Star-Shaped Conjugated Systems

2010

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“…22 Third-Harmonic Generation Spectroscopy. Measurements of THG by using the Maker fringe technique were performed by means of the experimental setup which is shown in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Effect of Donor−Acceptor Substitution on the Nonlinear Optical Properties of Oligo(1,4-phenyleneethynylene)s Studied by Third Harmonic Generation Spectroscopy

et al. 2005

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Third-harmonic generation (THG) spectroscopy was performed for oligo(1,4-phenyleneethynylene)s (OPEs) with terminal donor-acceptor (DA) substitution and compared to the results of merely donor substituted OPEs and regular OPE chains with 2,5-dipropoxy benzene rings. Both, extension of the conjugation and push-pull effect enhance the molecular hyperpolarizability γ, even for the DAOPEs, which exhibit a hypsochromic shift of the long-wavelength absorption for increasing length L of the conjugated chain.

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“…Molecularly defined linear oligomers have been drawn on as model compounds for the corresponding (polydisperse) polymers. Polymer physical properties such as persistence length and effective conjugation length can be successfully extrapolated from defined oligomer data. − The often-quoted counter-argument of a rather tedious incremental synthesis becomes anchorless for “rigid rod” applications that demand specific, easily tailorable dimensions. Linear molecular rods based on phenylene and ethynylene subunits have been widely used as spacers for metal chelate ligands, as enzyme transporters, for ESR and redox studies, for molecular electronics, − in surface studies, − and for the construction of large shape-persistent superstructures. , …”

Section: Introductionmentioning

confidence: 99%