Chiroptical properties of chiral-substituted polyfluorenes

Oda, Masanao; Meskers, Stefan C. J.; Nothofer, Heinz‐Georg; Scherf, Ullrich; Neher, Dieter

doi:10.1016/s0379-6779(99)00310-0

Cited by 61 publications

(57 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 Chiroptical properties, such as circular dichroism (CD), optical rotation, and circular polarized luminescence, enrich the applications of these organic semiconductors as optical devices or sensors. [5][6][7][8][9] Optically active side chains may introduce chiroptical properties into conjugated polymers, but some polymers exhibit these properties only in films or phase separating solutions, [10][11][12][13] which indicates that intermolecular chiral interactions are necessary to induce the chiroptical properties in such conjugated polymers.…”

Section: Introductionmentioning

confidence: 99%

Double screw-sense inversions of helical chiral-achiral random copolymers of fluorene derivatives in phase separating solutions

Sanada

Terao

Sato

2011

Polym J

View full text Add to dashboard Cite

The addition of methanol to dilute THF solutions of chiral-achiral random copolymers of fluorene derivatives and the chiral homopolymer showed thermo-reversible circular dichroism (CD) induction in the main-chain fluorene absorption region. This finding demonstrated the uneven population of the right-and left-handed helical conformations in the polymer chains. From the sign of the induced CD, two helical screw-sense inversions were found by changing the chiral monomer content. The Ising model for chirally interacting chiral-achiral random copolymers can explain the double screw-sense inversions.

show abstract

Section: Introductionmentioning

confidence: 99%

Double screw-sense inversions of helical chiral-achiral random copolymers of fluorene derivatives in phase separating solutions

Sanada

Terao

Sato

2011

Polym J

View full text Add to dashboard Cite

show abstract

“…2(S)-methylbutyl, 2(R)-ethylhexyl] were perhaps most intensively studied [8,[130][131][132][133]. For poly(fl uorenes) with 2(R)-ethylhexyl pendants, | g CPPL | = 0.28 and | g CPEL | = 0.25 were reported [131].…”

Section: Absorption and Emissionmentioning

confidence: 99%

Synthesis and Characterization of Novel Chiral Conjugated Materials

Rajca

Miyasaka

2006

Functional Organic Materials

View full text Add to dashboard Cite

“…1,2 Circular dichroism (CD), optical activity and circular polarized luminescence are additional optical and electro-optical properties that enable polyfluorene to be used in optical devices or sensors. Several researchers [3][4][5][6][7] were interested in these properties and investigated optically active polyfluorene derivatives bearing chiral side chains.…”

Section: Introductionmentioning

confidence: 99%

Induced circular dichroism of an optically active polyfluorene derivative in phase-separating solutions

Sanada

Sato

2009

Polym J

View full text Add to dashboard Cite

When methanol, a nonsolvent, was added to dilute tetrahydrofuran solutions of an optically active polyfluorene derivative, liquid-liquid phase separation occurred, and circular dichroism (CD) was induced at a low temperature. The polymer concentration of the minor separating phase, estimated by light scattering, was very high (B0.4 g cm À3 ). The CD induction occurring in that concentrated phase was temperature sensitive. When the phase-separating solution was quenched from 40 to 15 1C, the CD increased according to first-order reaction kinetics, and it was a rather slow process (the rate constant was 2.5Â10 À4 s À1 ). The intermolecular chiral interaction in the concentrated phase may be responsible for the CD induction or non-racemization of this helical polyfluorene derivative in phase-separating solutions.

show abstract

Chiroptical properties of chiral-substituted polyfluorenes

Cited by 61 publications

References 6 publications

Double screw-sense inversions of helical chiral-achiral random copolymers of fluorene derivatives in phase separating solutions

Double screw-sense inversions of helical chiral-achiral random copolymers of fluorene derivatives in phase separating solutions

Synthesis and Characterization of Novel Chiral Conjugated Materials

Induced circular dichroism of an optically active polyfluorene derivative in phase-separating solutions

Contact Info

Product

Resources

About