Synthesis and properties of a rod-g-rod bottlebrush with a semirigid mesogen-jacketed polymer as the side chain

Tian, Hai-Jian; Qu, Wenzhong; Zhu, Yufeng; Shen, Zhihao; Fan, Xinghe

doi:10.1039/c4py00033a

Cited by 11 publications

(11 citation statements)

References 49 publications

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“…In a typical 1 H NMR spectrum (Figure S1 in supporting information), the characteristic resonances of the exo ‐nobornenyl alkene protons at 6.1−6.2 ppm qualitatively illustrate that the exo ‐norbornenyl functionality has been introduced into the end of PMPCS. As reported by previous studies combining MALDI‐TOF MS and PS‐calibrated regular GPC, the absolute number‐average MW ( M n ) of linear PMPCS is approximately 1.52 times the value of the M n from GPC measurements. In this study, the absolute MWs were determined on the basis of such a relationship (Table ).…”

Section: Resultssupporting

confidence: 56%

“…The molecular brush PNb‐ g ‐PMPCS 4 was synthesized using the “grafting through” method. With this method, the molecular brushes with MJLCP side chains will have more defined structures than those obtained by using the “grafting onto” approach, which has been reported by our group . There was almost no difference between the 1 H NMR of Nb‐PMPCS and that of PNb‐ g ‐PMPCS (Figure S1 in supporting information).…”

Section: Resultssupporting

confidence: 55%

“…From the synthetic viewpoint, MJLCPs can be obtained by controlled/living polymerization methods such as living radical polymerizations, and the molecular weights (MWs) and MW distributions can be controlled. Thus, block copolymers, star‐like polymers, and molecular brushes containing MJLCPs have been synthesized by controlled/living polymerizations.…”

Section: Introductionmentioning

confidence: 99%

“…The application of click chemistry makes the attachment of side chains onto the backbone more successful and highly efficient. Molecular brushes containing MJLCP side chains attached onto a flexible polystyrene backbone (coil‐ g ‐rod type) or a rigid polypeptide backbone (rod‐ g ‐rod) have been synthesized using the “grafting onto” method. The “grafting through” method is the only one among the three strategies that can be used to synthesize well‐defined molecular brushes with a grafting density of 100%.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and phase behavior of a polynorbornene‐based molecular brush with dual “jacketing” effects

Qiao

Jing

Tian

et al. 2015

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

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In this study, a series of well-defined liquid crystalline molecular brushes with dual "jacketing" effects, polynorbornene-g-poly{2,5-bis[(4-methoxyhenyl)oxycarbonyl] styrene} (PNb-g-PMPCS), were synthesized by the "grafting through" method from ring opening metathesis polymerization of anorbornenyl-terminated PMPCS. The rigid PMPCS side chain was synthesized by Cu(I)-catalyzed atom transfer radical polymerization initiated by N-[(2-bromo-2-methylpropanoyl)ethyl]-cis-5-norbornene-exo-2,3-dicarboximide. The chemical structures of the molecular brushes were confirmed by 1 H NMR and gel permeation chromatography (GPC), and the thermal properties were studied by thermogravimetric analysis (TGA). GPC results reveal that the molecular brushes have relatively narrow polydispersities. TGA results show that the molecular brushes have excellent thermal stabilities. The PMPCS side chains in all the molecular brushes form the columnar nematic liquid crystalline phase, which is a little different from the behavior of linear PMPCS possibly due to the confinement or other effects of the brush architecture which leads to decreased order.

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Section: Resultssupporting

confidence: 56%

Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and phase behavior of a polynorbornene‐based molecular brush with dual “jacketing” effects

Qiao

Jing

Tian

et al. 2015

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

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“…New rod‐coil graft copolymers with polypeptide, polysaccharide, or alginate blocks have been recently synthesized for construction of self‐assembled structures in solution, which are particularly interesting for biological, medical, and biotechnological applications . Park et al designed a kind of facial peptides containing tryptophan units, tyrosine derivatives with tri(ethylene glycol) monomethyl ether, and terminal lysine units [Fig.…”

Section: Self‐assembly Of Amphiphilic Rod‐coil Graft Copolymersmentioning

confidence: 99%

Recent advances in the solution self‐assembly of amphiphilic “rod‐coil” copolymers

Huang

et al. 2017

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

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Solution self‐assembly of amphiphilic “rod‐coil” copolymers, especially linear block copolymers and graft copolymers (also referred to as polymer brushes), has attracted considerable interest, as replacing one of the blocks of a coil‐coil copolymer with a rigid segment results in distinct self‐assembly features compared with those of the coil‐coil copolymer. The unique interplay between microphase separation of the rod and coil blocks with great geometric disparities can lead to the formation of unusual morphologies that are distinctly different from those known for coil‐coil copolymers. This review presents the recent achievements in the controlled self‐assembly of rod‐coil linear block copolymers and graft copolymers in solution, focusing on copolymer systems containing conjugated polymers, liquid crystalline polymers, polypeptides, and polyisocyanates as the rod segments. The discussions concentrate on the principle of controlling over the morphology of rod‐coil copolymer assemblies, as well as their distinctive optical and optoelectronic properties or biocompatibility and stimuli‐responsiveness, which afford the assemblies great potential as functional materials particularly for optical, optoelectronic and biological applications. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1459–1477

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Cucurbit[8]uril‐Based Polymers and Polymer Materials

Zou

Liu

et al. 2018

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Cucurbit[8]uril (CB[8]) is unique and notable in the cucurbit[n]uril family, since it has a relatively large cavity and thus is able to simultaneously accommodate two guest molecules. Typically, an electron-deficient first guest and an electron-rich second guest can be bound by CB[8] to form a stable 1:1:1 heteroternary supramolecular complex. Additionally, two homo guests can also be strongly dimerized inside the cavity of CB[8] to form a 2:1 homoternary supramolecular complex. During the past decade, by combining polymer science and CB[8] host-guest chemistry, a variety of systems have been established to construct supramolecular polymers with polymer chains typically at the nanoscale/sub-microscale, and CB[8]-based micro/nanostructured polymer materials in the form of polymer networks and hydrogels, microcapsules, micelles, vesicles, and colloidal particles, normally in solution and occasionally on surfaces. This Review summarizes the noncovalent interactions and strategies used for the preparation of CB[8]-based polymers and polymer materials with a focus on the representative and latest developments, followed by a brief discussion of their characterization, properties, and applications.

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Synthesis and properties of a rod-g-rod bottlebrush with a semirigid mesogen-jacketed polymer as the side chain

Abstract: A series of bottlebrushes, PPLG-g-PMPCS, with an α-helical rigid backbone and mesogen-jacketed rigid side chains were synthesized by the “grafting onto” method. The conformation of the bottlebrush changes from a cylinder to an ellipsoid with increasing side-chain length.

Cited by 11 publications

References 49 publications

Synthesis and phase behavior of a polynorbornene‐based molecular brush with dual “jacketing” effects

Synthesis and phase behavior of a polynorbornene‐based molecular brush with dual “jacketing” effects

Recent advances in the solution self‐assembly of amphiphilic “rod‐coil” copolymers

Cucurbit[8]uril‐Based Polymers and Polymer Materials

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