The in situ “grafting from” approach for the synthesis of polymer brushes on upconversion nanoparticles via NIR-mediated RAFT polymerization

PHEA polymer brushes were grownin situfrom the surface of graphene sheetsviaSET-LRP through a “grafting-from” strategy at ambient temperature to afford the PHEA/graphene hybrid material with excellent dispersibility in organic solvents.

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Nanostructured Polymer Brushes With Reversibly Changing Properties

MRS Proceedings ◽

10.1557/proc-727-r2.5 ◽

2002 ◽

Vol 727 ◽

Author(s):

Denys Usov ◽

Manfred Stamm ◽

Sergiy Minko ◽

Christian Froeck ◽

Andreas Scholl ◽

...

Keyword(s):

Polymer Brushes ◽

Phase Segregation ◽

Water Contact ◽

Angle Measurements ◽

Nanostructured Polymer ◽

Contact Angle Measurements ◽

Vertical Segregation ◽

Oxygen Plasma Etching ◽

Grafting From ◽

Photoemission Electron

AbstractWe investigated the interplay between different mechanisms of the lateral and vertical segregation in the synthesized via “grafting from” approach symmetric A/B (where A and B are poly(styrene-co-2,3,4,5,6-pentafluorostyrene) and poly(methylmethacrylate), respectively) polymer brushes upon exposure to different solvents. We used X-ray photoemission electron spectroscopy and microscopy (X-PEEM), AFM, water contact angle measurements, and oxygen plasma etching to study morphology of the brushes. The ripple morphology after toluene (nonselective solvent) revealed elongated lamellar-like domains of A and B polymers alternating across the surface. The dimple-A morphology consisting of round clusters of the polymer A was observed after acetone (selective solvent for B). The top layer was enriched with the polymer B showing that the brush underwent both the lateral and vertical phase segregation. A qualitative agreement with predictions of SCF theory was found.

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Mechanistische Untersuchungen zum reversiblen Gleichgewicht von metallorganischen Tripeldecker- und Sandwichkomplexen des Typs [Bis{(η5-CpR)Co}-μ-{η4:η4-aren}] und [(η5-CpR)Co(η6-aren)] / Mechanistic Studies towards the Reversible Equilibrium between Metal Organic Triple Decker and Sandwich Complexes [Bis{(η5 -CpR)Co}-μ-{η4 :η4-arene}] and [{(η5-CpR)Co(η6-arene)]

Zeitschrift für Naturforschung B ◽

10.1515/znb-1998-1105 ◽

1998 ◽

Vol 53 (11) ◽

pp. 1267-1272 ◽

Cited By ~ 8

Author(s):

Jörg J. Schneider ◽

Dirk Wolf

Keyword(s):

Ligand Exchange ◽

Sandwich Complexes ◽

Valuable Metal ◽

H Nmr ◽

Synthetic Utility ◽

Metal Organic ◽

Arene Ligand ◽

Benzene Toluene

The arene ligand exchange mechanism of slipped arene triple deckers [Bis{(η5-CpR)Co}-μ-{η4:η4-arene}] (R = Me5, 1,2,4 tri-tert butyl, arene = benzene, toluene) 1 was studied by 1H-NMR spectroscopy for different concentrations and solvents. It has been found that triple deckers of type 1 decompose slowly in solution. A unique equilibrium, between these triple deckers and the mixed sandwich complexes [(η6-arene)Co(η5-CpR)] and 14 e [(η5-Cp)Co]solv fragments generated in situ by decomposition o f 1 exists. In addition to this equilibrium arene lability of the thus formed mixed sandwich complex type has been detected by NMR making slipped triple deckers 1 ideal single source compounds for the generation of two [(η5-Cp)Co] fragments in one reaction step. Such fragments are valuable metal ligand components with high synthetic utility in organometallic chemistry.

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In situ ligand exchange of thiol-capped CuInS2/ZnS quantum dots at growth stage without affecting luminescent characteristics

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2011.06.087 ◽

2011 ◽

Vol 363 (2) ◽

pp. 703-706 ◽

Cited By ~ 36

Author(s):

Hyunki Kim ◽

Minwon Suh ◽

Byung-Hwa Kwon ◽

Dong Seon Jang ◽

Sung Wook Kim ◽

...

Keyword(s):

Quantum Dots ◽

Ligand Exchange ◽

Growth Stage

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Preparation of nano-TiO2/polyurethane emulsions via in situ RAFT polymerization

Progress in Organic Coatings ◽

10.1016/j.porgcoat.2010.09.013 ◽

2010 ◽

Vol 69 (4) ◽

pp. 534-538 ◽

Cited By ~ 21

Author(s):

Xiang-Chen Che ◽

Yu-Zi Jin ◽

Youn-Sik Lee

Keyword(s):

Raft Polymerization ◽

Nano Tio2

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Synthesis of Poly(ester-graft-methyl methacrylate) on a Macroinitiator with Lateral Sulfonyl Chloride Groups by Atom Transfer Radical Polymerization

Polymer Science Series B ◽

10.1134/s1560090421040072 ◽

2021 ◽

Vol 63 (4) ◽

pp. 385-391

Author(s):

T. K. Meleshko ◽

A. B. Razina ◽

N. N. Bogorad ◽

M. P. Kurlykin ◽

A. V. Kashina ◽

...

Keyword(s):

Mechanical Properties ◽

Methyl Methacrylate ◽

Atom Transfer Radical Polymerization ◽

Radical Polymerization ◽

Polymer Brushes ◽

Sulfonyl Chloride ◽

Physical And Mechanical Properties ◽

Degree Of Polymerization ◽

Side Chains ◽

Grafting From

Abstract New polymer brushes with an ester backbone and poly(methyl methacrylate) side chains are synthesized by polycondensation and polymerization methods. The initiating groups are sulfonyl chloride groups laterally attached to the polyester chain. PMMA side chains are grafted by the ATRP method according to the “grafting from” multicenter macroinitiator strategy. The conditions for the polymerization processes in a controlled mode are selected, and the ways of targeted regulation of the degree of polymerization of methacrylate side chains are determined. Using the synthesized copolymers self-supporting films are obtained, and their physical and mechanical properties are studied.

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