By combination of mesogenic rod-like cycloplatinated monomers based on 2,5-di(4-alkenyloxyphenyl)pyridine ligands with 1,1,3,3,5,5-tetramethyltrisiloxane, a phosphorescent, liquid-crystalline polymer was obtained, which showed polarised emission.
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http://dx.doi.org/10.1039/c2cc35085h | DOI Listing |
ACS Appl Mater Interfaces
January 2025
Department of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania.
The locomotion of various organisms relies on the alternated elongation-contraction of their muscles or bodies. Such biomimicry can offer a promising approach to developing soft robotic devices with improved mobility and efficiency. Most strategies to mimic such motions rely on reversible size modifications of some materials upon exposure to external stimuli.
View Article and Find Full Text PDFJ Am Chem Soc
December 2024
Department of Chemistry at Brown University, 324 Brook Street, Providence, Rhode Island 02912, United States.
Biomacromolecular networks with multiscale fibrillar structures are characterized by exceptional mechanical properties, making them attractive architectures for synthetic materials. However, there is a dearth of synthetic polymeric building blocks capable of forming similarly structured networks. Bottlebrush polymers (BBPs) are anisotropic graft polymers with the potential to mimic and replace biomacromolecules such as tropocollagen for the fabrication of synthetic fibrillar networks; however, a longstanding limitation of BBPs has been the lack of rigidity necessary to access the lyotropic ordering that underpins the formation of collagenous networks.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
The creation of anisotropic nanoparticles (NPs) by polymerization and/or self-assembly (SA) has significantly promoted the applications of polymer nanomaterials in many fields. However, polymer nanorods are not easily accessible via conventional polymerization or SA. Here we report a one-step route to synthesize single-domain smectic liquid crystalline (LC) nanorods utilizing oriented attachment (OA) that was usually found in the synthesis of inorganic NPs, synchronized with polymerization and SA.
View Article and Find Full Text PDFJ Phys Chem B
December 2024
Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku,Yokohama, Kanagawa 236-0027, Japan.
All-atom molecular dynamics (MD) calculations of the crystalline polymeric -hydroxybenzoic acid (HBA) were conducted at various temperatures to investigate its thermal response. The calculated structure factor equivalent to the X-ray diffraction pattern of HBA clearly showed two phase transitions occurring at 600 and 650 K. The first transition at 600 K occurred from the orthorhombic phase to the pseudohexagonal phase, identified by the presence of the 211-peak.
View Article and Find Full Text PDFPhys Rev E
November 2024
William H. Miller III Department of Physics and Astronomy, Johns Hopkins University, Baltimore 21218, USA.
Composite materials made of polymers and liquid crystals have been widely employed in smart windows, optical filters, and bistable displays. However, it is often difficult to decipher the role of the polymer network architecture on the alignment and the texture of liquid crystals. In this study, we use a simple model system where a small amount of polymerizable liquid crystalline monomer is mixed in a liquid crystal that exhibits both a smectic phase and a cholesteric phase with a large helical pitch.
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