Magnetic Properties of Cobalt-Containing Diblock Copolymers with Cylindrical Morphology of Different Domain Sizes

Zha, Yongping; Maddikeri, Raghavendra R.; Gido, Samuel P.; Tew, Gregory N.

doi:10.1007/s10904-012-9744-2

Cited by 16 publications

(13 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, different from covalently bonded block‐ or graft‐copolymer‐based micelle systems, in which the dimensions of the micelles are rarely tunable without molecular weight changes36 or swelling by adding a homopolymer,37 the domain size of our supramolecular micelles can be readily controlled by the blend ratio of components. The composition of graft‐copolymer‐like supramolecules, which affects the size of both the core and corona of micelles, can be adjusted according to the blend ratio of SPS and P2VP, as summarized in Figure 2 f.…”

Section: Resultsmentioning

confidence: 99%

Controlled Nanopores in Thin Films of Nonstoichiometrically Supramolecularly Assembled Graft Copolymers

Cho

Song

Hwang

et al. 2015

Chemistry A European J

View full text Add to dashboard Cite

Herein, nanometer-scale morphologies of graft-copolymer-like supramolecular thin films, composed of sulfonic acid terminated polystyrene (SPS) and poly(2-vinylpyridine) (P2VP), and their application to antireflection coatings were investigated. The intermolecular complexes of SPS and P2VP, formed through nonstoichiometric multiple hydrogen bonding between the sulfonic acid group of SPS and the nitrogen atom in pyridine unit of P2VP, occurring in film deposition allowed for the formation of spherical micelles (with SPS and P2VP as the corona and core, respectively) in the thin film. Interestingly, the domain size of the micelles was tunable from approximately 20 to 90 nm on average by controlling either the blend ratio of components or the concentration of polymer solution. Furthermore, nanoporous thin films could be easily prepared by removing the core of micelle-based nanostructures by using a simple solvent etching process, leaving sulfonic acid groups on the surface of nanopores, which can be utilized as potential functional sites. Those resultant nanoporous thin films were conveniently employed as an antireflection layer on a glass substrate, giving a maximum 97.8 % transmittance in the visible wavelength range.

show abstract

Section: Resultsmentioning

confidence: 99%

Controlled Nanopores in Thin Films of Nonstoichiometrically Supramolecularly Assembled Graft Copolymers

Cho

Song

Hwang

et al. 2015

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Among the reported methods for the preparation of polymer−metal hybrids, 6,50−52 direct polymerization of metalcontaining monomers, 35,38,45,53 direct mixing of polymers and nanoparticles, 54,55 and in situ formation of metallic particles from polymer−metal complexes 56,57 have all been proven to be successful. For example, Cohen and co-workers have reported the synthesis of multiple types of nanoparticles within specific domains of polystyrene-block-polyvinylpyridine (PS−PVP) block copolymer templates through thermolysis of organometallic complexes coordinated to the PVP block.…”

Section: ■ Introductionmentioning

confidence: 99%

Phase Behavior of Alkyne-Functionalized Styrenic Block Copolymer/Cobalt Carbonyl Adducts and in Situ Formation of Magnetic Nanoparticles by Thermolysis

Jiang¹,

Nykypanchuk

Endoh³

et al. 2016

Macromolecules

View full text Add to dashboard Cite

A series of polystyrene-block-poly(4-(phenylethynyl)styrene) (PS-b-PPES) diblock copolymers with a range of compositions were prepared by reversible addition–fragmentation chain transfer (RAFT) polymerization. Block copolymer/cobalt carbonyl adducts (PS x -PPES y [Co2(CO)6] n ) were subsequently prepared by reaction of Co2(CO)8 with the alkyne groups of the PPES block. Phase behavior of the block copolymer/cobalt carbonyl adducts (PS x -PPES y [Co2(CO)6] n , 8% ≤ wt % PS ≤ 68%) was studied by small-angle X-ray scattering and transmission electron microscopy (TEM). As the composition of PS x -PPES y [Co2(CO)6] n copolymers was shifted from PS as the majority block to PPES y [Co2(CO)6] n as the majority block, the morphology was observed to shift from lamellar with larger PS domains to cylindrical with PS as the minority component and then to spherical with PS as the minority component. These observations have been used to map out a partial phase diagram for PS x -PPES y [Co2(CO)6] n diblock copolymers. Heating of PS x -PPES y [Co2(CO)6] n samples at relatively low temperatures (120 °C) results in the formation of nanoparticles containing crystalline cobalt and cobalt oxide domains within the PPES y [Co2(CO)6] n regions as characterized by TEM, X-ray diffraction (XRD), and X-ray scattering.

show abstract

“…An interesting cobalt-containing diblock copolymer, bearing a dicobalt hexacarbonyl complex coordinated to an alkyne, with a constant block ratio was proposed as a new magnetic material by Tew et al [ 53 ]. Their procedure involved the synthesis of a first block polymer, 12 , by ROMP of monomer 11 using Grubbs 3rd generation catalyst.…”

Section: Reviewmentioning

confidence: 99%

Recent advances in metathesis-derived polymers containing transition metals in the side chain

Drăguţan¹,

Drăguţan²,

Simionescu³

et al. 2015

Beilstein J. Org. Chem.

View full text Add to dashboard Cite

SummaryThis account critically surveys the field of side-chain transition metal-containing polymers as prepared by controlled living ring-opening metathesis polymerization (ROMP) of the respective metal-incorporating monomers. Ferrocene- and other metallocene-modified polymers, macromolecules including metal-carbonyl complexes, polymers tethering early or late transition metal complexes, etc. are herein discussed. Recent advances in the design and syntheses reported mainly during the last three years are highlighted, with special emphasis on new trends for superior applications of these hybrid materials.

show abstract

Magnetic Properties of Cobalt-Containing Diblock Copolymers with Cylindrical Morphology of Different Domain Sizes

Cited by 16 publications

References 27 publications

Controlled Nanopores in Thin Films of Nonstoichiometrically Supramolecularly Assembled Graft Copolymers

Controlled Nanopores in Thin Films of Nonstoichiometrically Supramolecularly Assembled Graft Copolymers

Phase Behavior of Alkyne-Functionalized Styrenic Block Copolymer/Cobalt Carbonyl Adducts and in Situ Formation of Magnetic Nanoparticles by Thermolysis

Recent advances in metathesis-derived polymers containing transition metals in the side chain

Contact Info

Product

Resources

About