On the helical motif of the complexes created by association of helix-forming schizophyllan (SPG) and helix-forming polythiophene derivatives.

@article{Haraguchi2009OnTH,
  title={On the helical motif of the complexes created by association of helix-forming schizophyllan (SPG) and helix-forming polythiophene derivatives.},
  author={Shuichi Haraguchi and Youichi Tsuchiya and Tomohiro Shiraki and Kouta Sugikawa and Kazuki Sada and Seiji Shinkai},
  journal={Chemistry},
  year={2009},
  volume={15 42},
  pages={
          11221-8
        }
}
pi-Conjugated polymers can finely tune their electrical and optical properties in response to their conformational changes. We believe that a deeper understanding of their higher-order structures will stimulate further development of their applications. We had revealed that one helix-forming natural polysaccharide (SPG) and one polythiophene derivative (PT-1) formed a stable one-dimensional complex and in the polythiophene main chain a helical conformation was induced through the dynamic… 
17 Citations
Thermo- and solvent-responsive polymer complex created from supramolecular complexation between a helix-forming polysaccharide and a cationic polythiophene.
TLDR
A new modified polysaccharide (Cur-oeg) is designed to form a "loose" macromolecular complex with a conjugated polymer (CP) that allows structural changes in response to external stimuli, and it is shown that the induced thermoresponsiveness is associated with structural rearrangement of the helical conformation of PT1 in the complex.
Creation of circularly polarized luminescence from an achiral polyfluorene derivative through complexation with helix-forming polysaccharides: importance of the meta-linkage chain for helix formation.
TLDR
It is found that the SPG/mPFS complex acts as a new high-performance CPL material with a solvent-dispersible nanowire structure that emits highly efficient CPL even in an aqueous solution.
Conformation Control of a Conjugated Polymer through Complexation with Bile Acids Generates Its Novel Spectral and Morphological Properties.
TLDR
A new strategy to isolate a water-soluble polythiophene and to control its higher-order structure by a supramolecular approach is reported, that is, among a few bile acids, lithocholate can form stoichiometric complexes with cationic polythyphene to isolate the polymer chain, and the higher- order structure is changeable by the molar ratio.
Chirality Transfer and Modulation in LB Films Derived From the Diacetylene/Melamine Hydrogen-Bonded Complex.
TLDR
The polymerized Langmuir-Blodgett (LB) films exhibited reversible colorimetric and chiroptical changes during repeated heating-cooling cycles, which should be ascribed to the strong hydrogen-bonding interaction between the carboxylic acid and the melamine core.
Conformational change, intrachain aggregation and photophysical properties of regioregular poly(3-octylthiophene) in alkanes
ABSTACT: This study explores the role of segmental solubility of regioregular poly(3-octylthiophene) (rr-P3OT) on chain organization and its photophysical properties. In good solvent chlorobenzene
Amylose-grafted Curdlan: A New Class of Semi-artificial Branched Polysaccharides for Hierarchical Polymeric Superstructures Created by the Action of "Orthogonal" Binding Sites.
TLDR
It is concluded that in the dendritic superstructure of this polysaccharide, a self-organized "Janus-type FRET system" was successfully constructed.
Supramolecular Helical Systems: Helical Assemblies of Small Molecules, Foldamers, and Polymers with Chiral Amplification and Their Functions.
In this review, we describe the recent advances in supramolecular helical assemblies formed from chiral and achiral small molecules, oligomers (foldamers), and helical and nonhelical polymers from
Electrostatically promoted dynamic hybridization of glucans with cationic polythiophene.
TLDR
Polycationic polymers, such as PyPT, are expected to serve as a versatile tool for unzipping glucan homo-triplexes and promoting subsequent hybridization in aqueous solution, while the detailed mechanism elucidated in the present study contributes to the rational design of hybridization partners.
Reversible Transformation of a One-Handed Helical Foldamer Utilizing a Planarity-Switchable Spacer and C2-Chiral Spirobifluorene Units
Polymeric quaterthiophenes containing optically active C2-chiral spirobifluorene skeletons were synthesized as a new type of helical foldamers, and their higher-order structures were investigated.
The unique optical behaviour of bio‐related materials with organic chromophores
Molecularly designed materials based on macromolecules and organic dyes offer unique opportunities in connection with the possibility of preparing optically responsive ‘smart’ materials. Indeed
...
1
2
...

References

SHOWING 1-10 OF 39 REFERENCES
Instantaneous inclusion of a polynucleotide and hydrophobic guest molecules into a helical core of cationic beta-1,3-glucan polysaccharide.
TLDR
It has been revealed that the polymeric complexes of CUR-N+ with polymeric guest molecules, such as polycytidylic acid (poly(C), permethyldecasilane (PMDS), and single-walled carbon nanotubes (SWNTs), can be easily obtained by just mixing them in water with sonication.
Chiral recognition of a synthetic peptide using enantiomeric conjugated polyelectrolytes and optical spectroscopy
The synthesis of two chiral isomers of 3-substituted polythiophenes, with cationic side-chain functionalities, and their use as conformational sensitive optical probes for the recording of pH-induced
Polysaccharide--polynucleotide complexes. 2. Complementary polynucleotide mimic behavior of the natural polysaccharide schizophyllan in the macromolecular complex with single-stranded RNA and DNA.
TLDR
The schizophyllan complex can be characterized by enhancement of the base stacking, cooperative dissociation, the similar thermodynamic parameters to DNA, and combination of the hydrogen-bonding and hydrophobic interactions to form the higher-order structure.
Beta-1,3-glucan polysaccharides as novel one-dimensional hosts for DNA/RNA, conjugated polymers and nanoparticles.
TLDR
Findings indicate that the beta-1,3-glucans are very attractive and useful materials not only in biotechnology but also in nanotechnology.
Cyclic oligothiophenes: novel organic materials and models for polythiophene. A theoretical study.
TLDR
The properties of cyclic oligomers are compared to those of the linear system, andcyclic oligothiophenes are revealed as good models for polythiophene.
Metal-induced supramolecualr chirality in an optically active polythiophene aggregate.
Chiral polythiophenes (PTs), in sharp contrast to other optically active polymers, exhibit optical activity in the pi-pi* transition region which is derived from the chirality of the main chain when
Conformational Studies of β‐glucans
TLDR
Steric and energy contour diagrams have been plotted for disaccharide‐like and for helical structures of linear β‐D‐glucans having (1 → 2), ( 1 → 3) and (1→ 4) linkages, indicating that the freedom of rotation of glucose residues is highly restricted in all the three polysaccharides.
β-1,3-Glucan (Schyzophyllan) Can Act as a One-Dimensional Host for Creating Chirally Twisted Poly(p-phenylene Ethynylene)
It has been demonstrated that a chiral, insulated poly(p-phenylene ethynylene) (PPE) nano-wire can be created by a polymer wrapping method utilizing natural β-1,3-glucan polysaccharide schizophyllan
Enantiomeric substituents determine the chirality of luminescent conjugated polythiophenes
Chiral isomers of 3-substituted polythiophenes with amino acid functiontionalized side chains are compared. The polymers show pH-dependent absorption, emission, and circular dichroism spectra in
...
1
2
3
4
...