Formation of aqueous molecular nematic liquid crystal phase in poly(p-sulfophenylene sulfoterephthalamide)

Viale, Sebastien; Best, Adam S.; Mendes, Eduardo; Picken, Stephen J.

doi:10.1039/b416723f

Cited by 26 publications

(30 citation statements)

References 12 publications

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“…For rheo-X-ray measurements the following equipment has been used (S. Viale et al 2005;Ruijter et al, 2006). Two glass coaxial capillaries with radii R out =0.5 (outer, unmoved) and R in =0.25 (inner, movable) and a length of ~10 cm combine the Couette cell ( Fig.8a).…”

Section: Rheo-x-raymentioning

confidence: 99%

Rheology-Morphology Interrelationships for Nanocomposites based on Polymer Matrices

Куличихин¹,

Semakov²,

Karbushev³

et al. 2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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Section: Rheo-x-raymentioning

confidence: 99%

Rheology-Morphology Interrelationships for Nanocomposites based on Polymer Matrices

Куличихин¹,

Semakov²,

Karbushev³

et al. 2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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“…In contrast to these extensive studies on the surfactants with flexible alkyl chains, there is no report concerning a rigid surfactant for the AuNP synthesis. In general, rigid molecules containing ionic groups conveniently self-assemble into well-defined nanostructures, such as rod-like aggregates 22 and ordered nematic nanostructures [23][24][25] in solution phase. Columnar nanostructures of a rigid surfactant were also reported in our previous study.…”

Section: Introductionmentioning

confidence: 99%

Light-controlled synthesis of gold nanoparticles using a rigid, photoresponsive surfactant

Huang

Kim

2012

Nanoscale

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We report a new strategy for shape control over the synthesis of gold nanoparticles (AuNPs) by using a photoresponsive surfactant based on a modified seed growth method. Owing to photoresponsive properties of the azo group, the designed surfactant, N(1),N(3),N(5)-tris[(4'-azobenzene-4-sulphonic acid)phenyl]benzene-1,3,5-tricarboxamide, exhibits a distinctive molecular configuration under light leading to different growth processes of AuNPs. As a result, the blackberry-like, spherical AuNPs and multilayered Au plates were successfully prepared in high yield under visible and UV light. The size and morphological control of Au nanocrystals are described and the synthesized Au nanocrystals are evaluated for SERS applications.

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“…Additional photomicrographs of lyotropic LC phases of these polymers in different solvents are provided in Supplementary Materials (Figure S4) . These results are reminiscent of those exhibited by sulfonated poly(phenylene terephalamide)s that exhibit biphasic solutions as low as 1 wt% in water [ 71 , 72 , 73 , 74 ].…”

Section: Resultsmentioning

confidence: 76%

Poly(Pyridinium Salt)s Containing 2,7-Diamino-9,9′-Dioctylfluorene Moieties with Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties

Bhowmik

Koh

et al. 2021

Molecules

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A series of poly(pyridinium salt)s-fluorene main-chain ionic polymers with various organic counterions were synthesized by using ring-transmutation polymerization and metathesis reactions. Their chemical structures were characterized by Fourier Transform Infrared (FTIR), proton (1H), and fluorine 19 (19F) nuclear magnetic resonance (NMR) spectrometers. These polymers showed a number-average molecular weight (Mns) between 96.5 and 107.8 kg/mol and polydispersity index (PDI) in the range of 1.12–1.88. They exhibited fully-grown lyotropic phases in polar protic and aprotic solvents at different critical concentrations. Small-angle X-ray scattering for one polymer example indicates lyotropic structure formation for 60–80% solvent fraction. A lyotropic smectic phase contains 10 nm polymer platelets connected by tie molecules. The structure also incorporates a square packing motif within platelets. Thermal properties of polymers were affected by the size of counterions as determined by differential scanning calorimetry and thermogravimetric analysis measurements. Their ultraviolet-visible (UV-Vis) absorption spectra in different organic solvents were essentially identical, indicating that the closely spaced π-π* transitions occurred in their conjugated polymer structures. In contrast, the emission spectra of polymers exhibited a positive solvatochromism on changing the polarity of solvents. They emitted green lights in both polar and nonpolar organic solvents and showed blue light in the film-states, but their λem peaks were dependent on the size of the counterions. They formed aggregates in polar aprotic and protic solvents with the addition of water (v/v, 0%–90%), and their λem peaks were blue shifted.

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Formation of aqueous molecular nematic liquid crystal phase in poly(p-sulfophenylene sulfoterephthalamide)

Cited by 26 publications

References 12 publications

Rheology-Morphology Interrelationships for Nanocomposites based on Polymer Matrices

Rheology-Morphology Interrelationships for Nanocomposites based on Polymer Matrices

Light-controlled synthesis of gold nanoparticles using a rigid, photoresponsive surfactant

Poly(Pyridinium Salt)s Containing 2,7-Diamino-9,9′-Dioctylfluorene Moieties with Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline and Light-Emitting Properties

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