Self‐assembly of rod‐coil molecules into lateral chain‐length‐dependent supramolecular organization

Zhong, Keli; Wang, Qi; Chen, Tie; Huang, Zhegang; Yin, Bo; Jin, Long

doi:10.1002/app.34555

Cited by 10 publications

(8 citation statements)

References 30 publications

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“…It should be pointed out that we reported previously that the lateral alkyl groups grafted on the center of the rod segment significantly to influence the self‐assembling behavior of rod–coil molecules. Recently, we have constructed the hexagonal‐perforate lamellar, columnar, body‐centered tetragonal, and hexagonal closed‐packed nanostructures with various lattice constants, by synthesizing rod–coil molecules containing lateral alkyl groups in the center of rod segments …”

Section: Resultsmentioning

confidence: 99%

Ordered nanostructures from self‐assembly of H‐shaped coil–rod–coil molecules

Wang

Zhong

Liang

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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A new class of p-conjugated, skewed H-shaped oligomers, consisting of biphenyl, phenylene vinylene, and phenylene ethynylene units as the rigid segment, were synthesized via Sonogashira coupling and Wittig reactions. The coil segments of these molecules were composed of poly(ethylene oxide) (PEO) or PEO with lateral methyl groups between the rod and coil segment, respectively. The experimental results revealed that the lateral methyl groups attached to the surface of the rod and coil segments dramatically influenced the selfassembling behavior of the molecules in the crystalline phase. H-shaped rod-coil molecules containing a lateral methyl group at the surface of the rod and PEO coil segments self-assemble into a two-dimensional columnar or a three-dimensional bodycentered tetragonal nanostructures in the crystalline phase, whereas molecules lacking a lateral methyl group based on the PEO coil chain self-organize into lamellar or hexagonal perforated lamellar nanostructures. V C 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 85-92

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Section: Resultsmentioning

confidence: 99%

Ordered nanostructures from self‐assembly of H‐shaped coil–rod–coil molecules

Wang

Zhong

Liang

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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“…4,4′‐Biphenol, poly(ethylene glycol) methyl ether (molecular weight = 350, 550, 750 g mol −1 ), toluene‐ p ‐sulfonyl chloride (99%), pyridine, potassium carbonate, methyl‐2,5‐dihydroxybenzoate, dimethylbiphenyl‐4,4′‐dicarboxylate, triethylamine (99.5%), 18‐crown‐6 (99%) and conventional reagents were used as received. Compounds 3a–3c were prepared according to similar procedures described elsewhere (see supporting information) …”

Section: Methodsmentioning

confidence: 99%

“…Lee and co‐workers have shown that rod–coil molecules incorporating lateral methyl groups in the middle of the rod segments spontaneously organise into hexagonal nanostructures in the liquid crystalline phase . More recently, the self‐assembling behaviour of coil–rod–coil molecules incorporating lateral methyl or ethyl groups in the centre of the rod‐like building block, and poly(ethylene oxide) with a degree of polymerisation of 7, 12 and 17 as coil segments, has been reported . The results reveal that lateral alkyl groups incorporated in rod building blocks lead to loose‐packing molecules, and govern the creation of 3‐D nano‐assemblies in the bulk.…”

Section: Introductionmentioning

confidence: 99%

“…Compounds 3a-3c were prepared according to similar procedures described elsewhere (see supporting information). 11,27 Techniques 1 H NMR spectra were recorded from CDCl 3 solution with a Bruker AM 300 spectrometer. A PerkinElmer Pyris Diamond differential scanning calorimeter was used to determine the thermal transitions with the maxima and minima of endothermic or exothermic peaks, with heating and cooling rates set at 10 ∘ C min −1 .…”

Section: Introductionmentioning

confidence: 99%

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Three‐dimensional crystalline supramolecular nanostructures from self‐assembly of rod–coil molecules incorporating lateral carboxyl group in the middle of the rod segment

Yang

Cheng-fan

et al. 2015

Polymer International

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We report the synthesis and self-assembling behaviour of coil-rod-coil molecules 1a-1c and 2a-2c, which incorporate lateral carboxyl or ester groups in the middle of the rod segment. The self-assembling behaviour of these molecules was investigated in the bulk using differential scanning calorimetry, polarised optical microscopy and small-angle X-ray scattering. Our results reveal that hydrogen bonds strongly influence the self-assembling behaviour of rod-like building blocks. Molecules 1a-1c, which incorporate carboxyl groups in the middle of rod segments, self-assemble into two-dimensional (2-D) columnar, three-dimensional (3-D) body-centred tetragonal and 3-D hexagonal close-packed assemblies in the crystalline state. However, molecules 2a-2c, which contain ester groups in the centre of rod segments, self-assemble into unexpected lamellar, hexagonal perforated lamellar and 2-D columnar nanostructures in the bulk, indicating that hydrogen bonds impede intermolecular stacking in this rod-coil system.

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“…Various supramolecular nano-structures can be formed by self-assembly of rod building block copolymers, which have a strong capacity to self-organize into a variety of ordered nanostructures, through tuning non-covalent driving forces of rod-coil block copolymers, such as interactions of pi-pi stacking, hydrophilic and hydrophobic effects, electrostatic interaction, and so on [13][14][15][16][17][18][19][20][21]. Lee and other research groups reported that rod-coil molecules are able to self organize into unique self-assembling nanostructures, such as 1-D lamellar, 2-D columnar, cylinders, discrete bundles, ribbons, and vesicles [22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Supramolecular nano-assemblies from self-assembly of ABC coil-rod-coil triblock oligomers: Construction of tetragonal perforated lamellar and columnar nano-structures

Fan

Cheng-fan

et al. 2015

Fibers Polym

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In this article, we report the self-assembling behavior of ABC coil-rod-coil triblock molecules 1a-1c and 2a-2c, containing biphenyl and phenyl units connected with ether and ester bonds as a rod segment and poly(propylene oxide)s (PPO) with a degree of polymerization (DP) of 7, 12 and 17 as a A block and octyl or hexadecyl alkyl chains as a C block of the coil segments. The supramolecular nanostructures of these molecules were characterized by a combination of techniques consisting of differential scanning calorimetry (DSC), thermal polarized optical microscopy (POM), and small-angle X-ray scattering (SAXS) measurement in the bulk state. Molecule 1a composed of PPO with a DP of 7 and a octyl alkyl chain as coil segment, self organize into unusal tetragonal perforated lamellar (TPL) and bicontinuous cubic (BCC) structures in the solid state and the liquid crystalline phase, respectively. While, molecule 2a consisting of same PPO coil as 1a and a hexadecyl alkyl chain, self assemble into TPL and BCC nano-structures in the crystalline phase. Meanwhile, molecules 1b-2b and 1c-2c incorporating longer PPO coil chains than 1a and 2a, self assemble into the columnar nano-structures in the solid state and liquid crystalline phase. These results clearly implied that self-organizing behavior of such molecules was dramatically influenced by the length of the PPO and alkyl coil chains connected with the rigid rod building block.

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Self‐assembly of rod‐coil molecules into lateral chain‐length‐dependent supramolecular organization

Cited by 10 publications

References 30 publications

Ordered nanostructures from self‐assembly of H‐shaped coil–rod–coil molecules

Ordered nanostructures from self‐assembly of H‐shaped coil–rod–coil molecules

Three‐dimensional crystalline supramolecular nanostructures from self‐assembly of rod–coil molecules incorporating lateral carboxyl group in the middle of the rod segment

Supramolecular nano-assemblies from self-assembly of ABC coil-rod-coil triblock oligomers: Construction of tetragonal perforated lamellar and columnar nano-structures

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