Redox-responsive organometallic microgel particles prepared from poly(ferrocenylsilane)s generated using microfluidics

Sui, Xiaofeng; Shui, Lingling; Cui, Jin; Xie, Yanbo; Song, Jing; Berg, Albert van den; Hempenius, Mark A.; Vancso, Gyula J.

doi:10.1039/c3cc49501a

Cited by 29 publications

(18 citation statements)

References 35 publications

(43 reference statements)

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“…171 Microfluidic processing enabled a liquid jet of the two immiscible monomers to form monodisperse PFS macro-crosslinker droplets. 171 Microfluidic processing enabled a liquid jet of the two immiscible monomers to form monodisperse PFS macro-crosslinker droplets.…”

Section: Redox-active and Preceramic Microspheresmentioning

confidence: 99%

Polyferrocenylsilanes: synthesis, properties, and applications

et al. 2016

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This in-depth review covers progress in the area of polyferrocenylsilanes (PFS), a well-established, readily accessible class of main chain organosilicon metallopolymer consisting of alternating ferrocene and organosilane units. Soluble, high molar mass samples of these materials were first prepared in the early 1990s by ring-opening polymerisation (ROP) of silicon-bridged [1]ferrocenophanes (sila[1]ferrocenophanes). Thermal, transition metal-catalysed, and also two different living anionic ROP methodologies have been developed: the latter permit access to controlled polymer architectures, such as monodisperse PFS homopolymers and block copolymers. Depending on the substituents, PFS homopolymers can be amorphous or crystalline, and soluble in organic solvents or aqueous media. PFS materials have attracted widespread attention as high refractive index materials, electroactuated redox-active gels, fibres, films, and nanoporous membranes, as precursors to nanostructured magnetic ceramics, and as etch resists to plasmas and other radiation. PFS block copolymers form phase-separated iron-rich, redox-active and preceramic nanodomains in the solid state with applications in nanolithography, nanotemplating, and nanocatalysis. In selective solvents functional micelles with core-shell structures are formed. Block copolymers with a crystallisable PFS core-forming block were the first to be found to undergo "living crystallisation-driven self-assembly" in solution, a controlled method of assembling block copolymers into 1D or 2D structures that resembles a living covalent polymerisation, but on a longer length scale of 10 nm-10 μm.

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Section: Redox-active and Preceramic Microspheresmentioning

confidence: 99%

Polyferrocenylsilanes: synthesis, properties, and applications

et al. 2016

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“…Fc derivatives are typically stable for both oxidized Fe(III) and reduced Fe(II) forms and behave as electron reservoirs to provide electrostatic stabilization. [33] This unique property is favorable for them to be used as rare neutral single-electron transfer reagents for the reduction of Au(III) and Ag(I) in the synthesis of gold nanoparticles (AuNPs) [33][34][35][36][37][38][39][40][41] and silver nanoparticles (AgNPs), [39][40][41][42][43][44] and contribute to the stabilization of NPs under ferricinium form. In the present work, JD 7 was firstly applied as the reducing agent of Au(III) and Ag(I), and the stabilizer of the corresponding NPs ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Multifunctional triazolylferrocenyl Janus dendron: Nanoparticle stabilizer, smart drug carrier and supramolecular nanoreactor

Zhao

Ling

Liu

et al. 2017

Applied Organom Chemis

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Owing to their unique broken symmetry, amphiphilic Janus dendrimers and dendons provide fascinating properties for material, biological, pharmaceutical and biomedical applications. The integration of various organometallic moieties into these macromolecules will further offer the opportunity to form complex and intelligent architectures and materials. Here, we report a novel, simple and multifunctional Janus dendron containing redox‐reversible hydrophobic ferrocene (Fc) unit, complexing‐effective 1,2,3‐triazole ligand and biocompatible hydrophilic triethylene glycol termini. Silver and gold nanoparticles were firstly successfully prepared by using the Janus dendron as the reducing agent of Au(III) and Ag(I), and the stabilizer of the corresponding nanoparticles. The redox response of the Fc moiety was then employed to trigger the release of model drug, rhodamine B, encapsulated in supramolecular micelles formed by the self‐assembly of the Janus dendron. Finally, the precise and excellent metal‐complexing ability of the triazole group in this dendron was fully utilized to stabilize a water‐soluble Cu(I) catalyst, forming supramolecular nanoreactors for the catalysis of the copper(I)‐catalyzed azide alkyne cycloaddition click reaction in only water. The multifunctional characteristics of this dendron highlight the potential for organometallic Janus dendrimers and dendrons in the fields of functional materials and nanomedicines.

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“…[31][32][33][34] Due to the presence of the redox-active ferrocene units in the organometallic PFS main chain, the corresponding PILs display redox responsive behavior in response to chemical or electrochemical stimuli. [31][32][33][34] Due to the presence of the redox-active ferrocene units in the organometallic PFS main chain, the corresponding PILs display redox responsive behavior in response to chemical or electrochemical stimuli.…”

Section: Redox Responsive Behaviormentioning

confidence: 99%

“…Using different external triggers, i.e., temperature and redox reactions, responsive metallopolymers have been reported recently, exhibiting selective release and turbidity behavior. [31][32][33][34] Due to the presence of the redox-active ferrocene units in the organometallic PFS main chain, the corresponding PILs display redox responsive behavior in response to chemical or electrochemical stimuli. Given that ferrocene units have a standard oxidation potential of around +0.4 V, it is possible to fully oxidize PFS by using FeCl 3 (E° = +0.77 V).…”

Section: Redox Responsive Behaviormentioning

confidence: 99%

Switching Light Transmittance by Responsive Organometallic Poly(ionic liquid)s: Control by Cross Talk of Thermal and Redox Stimuli

Zhang

Feng

Hempenius

et al. 2017

Adv Funct Materials

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A novel organometallic poly(ionic liquid) with both redox-and thermoresponsive properties is synthesized from a poly(ferrocenylsilane) (PFS) via a one-step Strecker sulfite alkylation reaction by using tetraalkylphosphonium sulfite as an effective and versatile nucleophile. This dual-responsive polymer is composed of a PFS backbone and quaternary phosphonium sulfonate side groups and exhibits a concentration-dependent lower critical solution temperature (LCST)-type phase transition in aqueous solution. Furthermore, the LCST-type phase behavior of the polymer can be switched between the "off " state and "on" state by chemical or electrochemical oxidation and reduction on the ferrocene units in the polymer main chain. As a consequence, a classical LCST-type phase transition, as well as an "isothermal" redox-triggered phase transition can be induced by using thermal and electrochemical triggers without changing the composition of the system. On the basis of this dual responsiveness, a "smart window" device is fabricated. The optical characteristics of this device are completely unaltered after 100 thermal and/ or redox cycles.

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Redox-responsive organometallic microgel particles prepared from poly(ferrocenylsilane)s generated using microfluidics

Cited by 29 publications

References 35 publications

Polyferrocenylsilanes: synthesis, properties, and applications

Polyferrocenylsilanes: synthesis, properties, and applications

Multifunctional triazolylferrocenyl Janus dendron: Nanoparticle stabilizer, smart drug carrier and supramolecular nanoreactor

Switching Light Transmittance by Responsive Organometallic Poly(ionic liquid)s: Control by Cross Talk of Thermal and Redox Stimuli

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