Journal ArticleDOI
Visible Light-Mediated Polymerization-Induced Self-Assembly in the Absence of External Catalyst or Initiator
TLDR
In this article, the use of visible light to mediate a RAFT dispersion polymerization in the absence of external catalyst or initiator to yield nanoparticles of different morphologies according to a polymerization-induced self-assembly (PISA) mechanism was reported.Abstract:
We report the use of visible light to mediate a RAFT dispersion polymerization in the absence of external catalyst or initiator to yield nanoparticles of different morphologies according to a polymerization-induced self-assembly (PISA) mechanism. A POEGMA macro-chain transfer agent (macro-CTA) derived from a 4-cyano-4-((dodecylsulfanylthiocarbonyl)sulfanyl)pentanoic acid (CDTPA) RAFT agent can be activated under blue (460 nm, 0.7 mW/cm2) or green (530 nm, 0.7 mW/cm2) light and act simultaneously as a radical initiator, chain transfer agent, and particle stabilizer under ethanolic dispersion conditions. In particular, the formation of worm-like micelles was readily monitored by the increase of reaction viscosity during the polymerization; this method was shown to be particularly robust to different reaction parameters such as macro-CTAs of varying molecular weight. Interestingly, at high monomer conversion, different morphologies were formed depending on the wavelength of light employed, which may be due t...read more
Citations
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Journal ArticleDOI
Hydrogen-Bonding UCST-Thermosensitive Nanogels by Direct Photo-RAFT Polymerization-Induced Self-Assembly in Aqueous Dispersion.
TL;DR: The hydrodynamic diameter, swelling ratio, and phase transition temperature of nanogels can be tuned by modifying the initial molar ratio of monomer-to-macro-CTA and the amount of crosslinker in the photo-RAFT PISA of NAGA.
Journal ArticleDOI
Light-mediated one-pot synthesis of an ABC triblock copolymer in aqueous solution via RAFT and the effect of pH on copolymer self-assembly
TL;DR: In this article, a diblock copolymer showing pH-dependent water solubility is chain extended with a hydrophobic third block to obtain an ABC type amphiphilic triblock copolerant poly(ethylene oxide-b-(2-dimethylamino)ethyl methacrylate-b(2-hydroxypropyl methacyl)).
Journal ArticleDOI
Trending methods employed for polymerization induced self-assembly
TL;DR: Polymerization Induced Self-Assembly (PISA) as mentioned in this paper is a technique for the synthesis of block copolymer nano-objects with a wide range of morphologies including spheres, worms, rods and vesicles.
Journal ArticleDOI
Organic–inorganic hybrid nanomaterials prepared via polymerization-induced self-assembly: recent developments and future opportunities
TL;DR: A review of recent developments in the preparation of organic-inorganic hybrid nanomaterials via polymerization-induced self-assembly can be found in this article , where the authors highlight some of the most interesting developments.
Journal ArticleDOI
Involving Synergy of Green Light and Acidic Responses in Control of Unimolecular Multicolor Luminescence.
Yunyun Zhou,Liangliang Zhu +1 more
TL;DR: A novel dyad with a linkage of 4-piperazinyl-1,8-naphthalimide and cyanostyryl-modified azulene moiety is presented, upon which the luminescence signal can be orthogonally controlled by protonation and green light irradiation and may bring in novel insights for preparing advanced function-integrated optoelectronic materials.
References
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Journal ArticleDOI
Living Radical Polymerization by the RAFT Process - A Second Update
TL;DR: The authors provides a third update to the review of reversible deactivation radical polymerization (RDRP) achieved with thiocarbonylthio compounds (ZC(S)SR) by a mechanism of reversible addition-fragmentation chain transfer (RAFT) that was published in June 2005.
Journal ArticleDOI
Polymerization-Induced Self-Assembly of Block Copolymer Nano-objects via RAFT Aqueous Dispersion Polymerization
TL;DR: This approach has quickly become a powerful and versatile technique for the synthesis of a wide range of bespoke organic diblock copolymer nano-objects of controllable size, morphology, and surface functionality.
Journal ArticleDOI
Light-Controlled Radical Polymerization: Mechanisms, Methods, and Applications
TL;DR: A comprehensive survey of photo-CRP reactions can be found in this article, where a large number of methods are summarized and further classified into subcategories based on the specific reagents, catalysts, etc., involved.
Journal ArticleDOI
Metal-Free Atom Transfer Radical Polymerization
Nicolas J. Treat,Hazel Sprafke,John W. Kramer,Paul G. Clark,Bryan E. Barton,Javier Read de Alaniz,Brett P. Fors,Craig J. Hawker,Craig J. Hawker +8 more
TL;DR: A metal-free ATRP process, mediated by light and catalyzed by an organic-based photoredox catalyst, is reported that resulted in block copolymer formation was facile and could be combined with other controlled radical processes leading to structural and synthetic versatility.
Journal ArticleDOI
A Robust and Versatile Photoinduced Living Polymerization of Conjugated and Unconjugated Monomers and Its Oxygen Tolerance
TL;DR: A photoinduced living polymerization technique is reported, which is able to polymerize a large range of monomers, including conjugated and unconjugated monomer, using ultralow concentrations of an iridium-based photoredox catalyst and a low energy visible LED as the light source.