Liquid Crystalline Ordering in the Self-Assembled Monolayers of Tethered Rodlike Polymers

Kim, Jee-Hyuk; Rahman, M. Shahinur; Lee, Jae‐Suk; Park, Ji‐Woong

doi:10.1021/ja072412e

Cited by 38 publications

(51 citation statements)

References 18 publications

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“…[268][269][270][271][272] Finally, block copolymers having a rigid rod block are synthesized. [273][274][275][276][277][278][279][280][281] These block copolymers exhibit unique electric (or photoelectronic) properties and can be used as organic (or plastic) solar cells. 273,274 Typical rigid blocks are poly(p-phenylene vinylene) (PPV), poly(3-hyxyl thiopene), and poly(hexyl isocyanate), while the counterpart blocks are PS, PMMA, PI, and P2VP.…”

Section: Phase Behavior Of Various Architectures Of Blockmentioning

confidence: 99%

“…This shows nanofiber structure at low volume fraction of P2VP, but with increasing volume fraction of P2VP, lamellar and cylindrical microdomains are observed. 278 Lee and coworkers [279][280][281] showed that rodlike poly(n-hexylisocyanate) (PHIC) chains in PHIC-b-poly-(2-vinylpyridine)G (P2VP) was highly oriented and anisotropic organized as a self-assembled monolayer through lyotropic liquid crystalline ordering on a substrate surface.…”

Section: Phase Behavior Of Various Architectures Of Blockmentioning

confidence: 99%

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Self-assembled block copolymers: Bulk to thin film

2008

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Block copolymers that two or more polymer chains are covalently linked have drawn much attention due to self-assembly into nanometer-sized morphology such as lamellae, cylinders, spheres, and gyroids. In this article, we first summarize the phase behavior of block copolymers in bulk and thin films and some applications for new functional nanomaterials. Then, future perspectives on block copolymers are described.

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Section: Phase Behavior Of Various Architectures Of Blockmentioning

confidence: 99%

Section: Phase Behavior Of Various Architectures Of Blockmentioning

confidence: 99%

Self-assembled block copolymers: Bulk to thin film

2008

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“…[1][2][3][4][5][6][7][8][9][10][11] Although polyisocyanates can be prepared readily by anionic polymerization, [12][13][14][15] it has been difficult to synthesize well-defined polyisocyanates via living anionic polymerization because of backbiting reactions resulting in the formation of trimers. Thus, polyisocyanates have been used for various applications such as chiral recognition and optical switches, and as liquid crystalline materials.…”

Section: Introductionmentioning

confidence: 99%

Precise synthesis of thermoreversible block copolymers containing reactive furfuryl groups via living anionic polymerization: the countercation effect on block copolymerization behavior

et al. 2015

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The anionic block copolymerization of 4,4'-vinylphenyl-N,N-bis(4-tert-butylphenyl)benzenamine (A) with furfuryl isocyanate (B) was carried out using potassium naphthalenide (K-Naph) in tetrahydrofuran at −78 and −98°C to prepare well-defined block copolymers containing furan groups for the formation of thermoreversible networks via a Diels-Alder (DA) reaction. While no block copolymerization was observed in the absence of sodium tetraphenylborate (NaBPh 4 ) due to side reactions, well-defined poly-copolymers with controlled molecular weights (M n = 18 700-19 500 g mol −1 ) and narrow molecular weight distributions (M w /M n = 1.08-1.17) were successfully synthesized in the presence of excess NaBPh 4 . The occurrence of the undesirable side reactions during polymerization of B was effectively prevented by NaBPh 4 , which results in the change in the countercation from K + to Na + for further polymerization of B. The cross-linking via the DA reaction between the furan groups of PBAB and bismaleimide was proved by FT-IR and differential scanning calorimetry (DSC), and the thermoreversible properties of the cross-linked polymer were subsequently investigated using DSC and solubility testing. † Electronic supplementary information (ESI) available. See

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“…The surface properties of pure PHIC [54][55][56][57] and of copolymers with poly(2-vinyl pyridine), polyisoprene or polystyrene [58,59] have been previously investigated. Kawaguchi et al [54] found that pure PHIC forms a stable film on the air-water interface and comparison of experimental data with theoretical calculations suggested that the PHIC rods lay on the surface.…”

Section: Poly(n-hexyl Isocyanate) Conjugatesmentioning

confidence: 99%

Constraining Polymers into β-Turns: Miscibility and Phase Segregation Effects in Lipid Monolayers

et al. 2017

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Investigation of model biomembranes and their interactions with natural or synthetic macromolecules are of great interest to design membrane systems with specific properties such as drug-delivery. Here we study the behavior of amphiphilic β-turn mimetic polymer conjugates at the air-water interface and their interactions with lipid model membranes. For this endeavor we synthesized two different types of conjugates containing either hydrophobic polyisobutylene (PIB, M n = 5000 g·mol −1 ) or helical poly(n-hexyl isocyanate) (PHIC, M n = 4000 g·mol −1 ), both polymers being immiscible, whereas polyisobutylene as a hydrophobic polymer can incorporate into lipid membranes. The conjugates were investigated using Langmuir-film techniques coupled with epifluorescence microscopy and AFM (Atomic Force Microscopy), in addition to their phase behavior in mixed lipid/polymer membranes composed of DPPC (dipalmitoyl-sn-glycero-3-phosphocholine). It was found that the DPPC monolayers are strongly disturbed by the presence of the polymer conjugates and that domain formation of the polymer conjugates occurs at high surface pressures (π > 30 mN·m −1 ).

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Liquid Crystalline Ordering in the Self-Assembled Monolayers of Tethered Rodlike Polymers

Cited by 38 publications

References 18 publications

Self-assembled block copolymers: Bulk to thin film

Self-assembled block copolymers: Bulk to thin film

Precise synthesis of thermoreversible block copolymers containing reactive furfuryl groups via living anionic polymerization: the countercation effect on block copolymerization behavior

Constraining Polymers into β-Turns: Miscibility and Phase Segregation Effects in Lipid Monolayers

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