Near-infrared light induced cationic polymerization based on upconversion and ferrocenium photochemistry

Meng, Xiaoyan; Lu, Hongdian; Li, Zhiquan; Wang, Chen; Liu, Ren; Guan, Xin; Yaǧcı, Yusuf

doi:10.1039/c9py01262a

Cited by 29 publications

(27 citation statements)

References 38 publications

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“…[ 88 , 89 , 90 , 91 , 92 ]. In addition, several new compounds have also shown broad visible light absorption in the cationic polymerization of epoxides, such as azahelicenes [ 93 ], rubrene [ 94 ], N -[2-(dimethylamino)ethyl]-1,8-naphthalimide [ 95 ], spiroxanthene [ 96 ], polyoxometalate [ 97 ], nanoparticles and ferrocenium salts [ 98 ], etc.…”

Section: Onium Salt Photoinitiators For Different Epoxy Monomersmentioning

confidence: 99%

Review on UV-Induced Cationic Frontal Polymerization of Epoxy Monomers

et al. 2020

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Ultraviolet (UV)-induced cationic frontal polymerization has emerged as a novel technique that allows rapid curing of various epoxy monomers upon UV irradiation within a few seconds. In the presence of a diaryliodonium salt photoinitiator together with a thermal radical initiator, the cationic ring opening polymerization of an epoxide monomer is auto-accelerated in the form of a self-propagating front upon UV irradiation. This hot propagating front generates the required enthalpy to sustain curing reaction throughout the resin formulation without further need for UV irradiation. This unique reaction pathway makes the cationic frontal polymerization a promising route towards the efficient curing of epoxy-based thermosetting resins and related composite structures. This review represents a comprehensive overview of the mechanism and progress of UV-induced cationic frontal polymerization of epoxy monomers that have been reported so far in literature. At the same time, this review covers important aspects on the frontal polymerization of various epoxide monomers involving the chemistry of the initiators, the effect of appropriate sensitizers, diluents and fillers.

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Section: Onium Salt Photoinitiators For Different Epoxy Monomersmentioning

confidence: 99%

Review on UV-Induced Cationic Frontal Polymerization of Epoxy Monomers

et al. 2020

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“…[42] Since then UCNPs have been used in a range of other polymer material applications, for example photochemical bond formation, [43] and photoinitiation. [44][45][46] While UCNPorganic hybrid materials offer great potential in translating common photochemical reactions into bioorthogonal systems, this review will focus on systems where the photochemical chromophore can be directly activated by long wavelength light.…”

Section: Upconverting Nanoparticle-polymer Hybridsmentioning

confidence: 99%

Shining a Light on Bioorthogonal Photochemistry for Polymer Science

Boase

2020

Macromol. Rapid Commun.

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Bioorthogonal chemistry is revolutionizing the fields of biological chemistry and nanomedicine, providing tools to actively probe and perturb native biochemical processes. Photochemistry provides the opportunity to actively and non‐invasively control bioorthogonal reactions, providing sophisticated optochemical tools. Despite the opportunities in bioorthogonal photochemistry, there remain many significant challenges to the clinical translation of current research. This review aims to provide an overview of these challenges and highlight recent examples from the literature that are providing revolutionary solutions to overcoming these barriers. It will highlight new photochemical systems that can be triggered by near infrared light in aqueous solutions and have been demonstrated to function in complex biological systems, including in living animals. It will cover diverse classes of photochemical reactions including photopolymerization, uncaging, conjugation, and photoswitching. The discussion will detail how new approaches are being integrated into polymers or highlight unexploited opportunities. This review intends to showcase how the unique synergy of bioorthogonal photochemistry and polymer science provides vast opportunities in the fields of biomaterials, nanomedicine, and theranostics. This will hopefully provide inspiration to material scientists to integrate bioorthogonal photochemistry into new adaptable materials and ensure translation to solve clinical challenges.

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“…Polymerization refers to a process in which small molecules (i. e., monomers) are chemically combined to produce large and chain‐like or network molecules [1] . Among different forms of polymerization, photopolymerization represents an approach that utilizes light as the energy source to induce polymerization reaction of excited monomer molecules [1] . Since the advent of photopolymers in the late 1960s, [2] photopolymerization has been extensively investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Since the advent of photopolymers in the late 1960s, [2] photopolymerization has been extensively investigated. Compared with conventional thermal‐induced polymerization, [3] photopolymerization has demonstrated several unique advantages, including fast reaction rate, low polymerization temperature, low energy consumption, etc [1] . Therefore, photopolymerization has been widely used in printed inks, [4] electronics, [5] industrial coating, [6] digital storage, [7] 3D printing, [8] biomedicine, [9] etc.…”

Section: Introductionmentioning

confidence: 99%

“…Meng et al. reported the direct cationic photopolymerization based on UCNPs and ferrocenium photochemistry, in which the ferrocenium salts were used to sensitize the UV−A and blue light emissions (300∼480 nm) from UCNPs, and generated active Lewis acid for initiation of cationic polymerization of oxirane and vinyl monomers with the “dark polymerization” efficiency over 30 % [1] . In addition, the UCNP‐assisted photopolymerization also offers an approach for growth of polymer shell on UCNP surface in a well‐controlled manner.…”

Section: Introductionmentioning

confidence: 99%

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Lanthanide‐Doped Nanoparticles for Near‐Infrared Light Activation of Photopolymerization: Fundamentals, Optimization and Applications

Yuan

Liu

et al. 2021

The Chemical Record

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Photopolymerization refers to a type of polymerization process in which light is utilized as excitation source to initiate polymerization of monomers and oligomers. Despite great progress, photopolymerization is typically induced by ultraviolet or visible light, which still greatly restrains its applications. Upconversion nanoparticles (UCNPs) represent a class of optical nanomaterials that are able to convert low‐energy near‐infrared (NIR) light into high‐energy ultraviolet (or visible light) emissions. In this context, UCNP‐assisted photopolymerization has recently attracted extensive attentions due to its unique advantages. In this account, recent advances in the fundamentals, optimization and emerging applications of UCNP‐based photopolymerization are reviewed. Fundamental theories of upconversion luminescence and photopolymerization will be introduced first. Various optimization approaches to improve UCNP‐assisted photopolymerization are then summarized, followed by diverse emerging applications. Challenges and future perspectives in this area will be provided as a conclusion.

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Near-infrared light induced cationic polymerization based on upconversion and ferrocenium photochemistry

Abstract: Ferrocenium salts as unimolecular photoinitiators can efficiently initiate upconversion nanoparticle-assisted cationic photopolymerization under near-infrared light excitation.

Cited by 29 publications

References 38 publications

Review on UV-Induced Cationic Frontal Polymerization of Epoxy Monomers

Review on UV-Induced Cationic Frontal Polymerization of Epoxy Monomers

Shining a Light on Bioorthogonal Photochemistry for Polymer Science

Lanthanide‐Doped Nanoparticles for Near‐Infrared Light Activation of Photopolymerization: Fundamentals, Optimization and Applications

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