Robust hollow nanocomposites with ruthenium–bipyridine complexes for heterogeneous catalysis of logic-controlled RAFT polymerization

Huang, Ya; Zhang, Xi Rong; S, Ye; Li, Jia Le; Li, Xue; Cai, Tao

doi:10.1039/c9nr04664j

Cited by 24 publications

(18 citation statements)

References 44 publications

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“…Several transition metal-based complexes or organic dyes were comprehensively studied to harvest solar energy and catalyze photochemical transformations. − Nonetheless, some often-cited deficiencies associated with existing homogeneous systems in terms of high cost, toxicity of transition metals, limited availability, and tedious postpolymerization purification procedures for catalyst removal are still challenging. Therefore, researchers devote their effort to develop a polymerization process amenable by stable, recyclable, reusable, and transition metal-free catalysts, in order to eliminate metal contamination in synthetic polymer materials.…”

Section: Introductionmentioning

confidence: 99%

Xanthene Dye-Functionalized Conjugated Porous Polymers as Robust and Reusable Photocatalysts for Controlled Radical Polymerization

et al. 2020

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Photoinduced electron/energy transfer–reversible addition–fragmentation chain transfer (PET–RAFT) polymerization represents a versatile and highly efficient method for polymerizations of wide-ranging monomer variances upon solar energy harvesting. Although significant progress has been achieved, several drawbacks are still associated with existing photocatalysts, such as toxicity of transition metals, high cost, poor stability, and unavoidable purification procedures because of the photobleaching effect, to name a few. Herein, 1,4-diethynylbenzene-linked xanthene dye-conjugated porous polymers (CPPs) have been established as potential heterogenous photocatalysts of PET–RAFT polymerization. With this two-dimensional planar architecture, we demonstrate dual-stimuli toggling of RAFT polymerization using two different external physical manipulations: light “ON”/“OFF” and solution pH “LOW”/“HIGH”. In addition, these CPPs endowed radical polymerizations with various impressive features such as compatibility of diverse monomer formulations, unique oxygen tolerance, and ppm-level catalyst dosage. Demonstrations of chain extension and catalyst recycling further highlight the robustness and performance of this CPP catalyst. Through the study of structure–property relationship using the experimental analyses, we envisage that a series of xanthene dye-functionalized CPPs can be developed as visible light-absorbing organocatalysts rivaling transition-metal photocatalysts.

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Section: Introductionmentioning

confidence: 99%

Xanthene Dye-Functionalized Conjugated Porous Polymers as Robust and Reusable Photocatalysts for Controlled Radical Polymerization

et al. 2020

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“…In particular, the development of heterogeneous catalysts is receiving increasing attention, as it provides both easier separation and potential for recycling. [37][38][39][40][41][42][43][44] In parallel, computational methods are showing promise for the rational optimization of existing photocatalysts and the incorporation of new synthetic capabilities. [45,46] In addition to PET-RAFT, photoinitiators capable of directly forming radicals via homolysis under light have continued to receive attention for activating RAFT.…”

Section: Indirect Photoactivationmentioning

confidence: 99%

“…In particular, the development of heterogeneous catalysts is receiving increasing attention, as it provides both easier separation and potential for recycling. [ 37–44 ] In parallel, computational methods are showing promise for the rational optimization of existing photocatalysts and the incorporation of new synthetic capabilities. [ 45,46 ]…”

Section: Nontraditional Activation Of Tctsmentioning

confidence: 99%

Progress and Perspectives Beyond Traditional RAFT Polymerization

et al. 2020

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The development of advanced materials based on well-defined polymeric architectures is proving to be a highly prosperous research direction across both industry and academia. Controlled radical polymerization techniques are receiving unprecedented attention, with reversible-deactivation chain growth procedures now routinely leveraged to prepare exquisitely precise polymer products. Reversible addition-fragmentation chain transfer (RAFT) polymerization is a powerful protocol within this domain, where the unique chemistry of thiocarbonylthio (TCT) compounds can be harnessed to control radical chain growth of vinyl polymers. With the intense recent focus on RAFT, new strategies for initiation and external control have emerged that are paving the way for preparing well-defined polymers for demanding applications. In this work, the cutting-edge innovations in RAFT that are opening up this technique to a broader suite of materials researchers are explored. Emerging strategies for activating TCTs are surveyed, which are providing access into traditionally challenging environments for reversible-deactivation radical polymerization. The latest advances and future perspectives in applying RAFT-derived polymers are also shared, with the goal to convey the rich potential of RAFT for an ever-expanding range of high-performance applications.

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“…136 Cai and coworkers reported a series of nanocomposites for RAFT polymerization. [137][138][139][140][141][142][143]…”

Section: Nanocompositesmentioning

confidence: 99%

Heterogeneous photocatalytic reversible deactivation radical polymerization

Zhu

2021

Polym. Chem.

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Robust hollow nanocomposites with ruthenium–bipyridine complexes for heterogeneous catalysis of logic-controlled RAFT polymerization

Abstract: Logic-controlled RAFT photopolymerization has become a powerful and eco-friendly toolkit to create well-defined macromolecular buildups while exhibiting composition, sequence and spatiotemporal control.

Cited by 24 publications

References 44 publications

Xanthene Dye-Functionalized Conjugated Porous Polymers as Robust and Reusable Photocatalysts for Controlled Radical Polymerization

Xanthene Dye-Functionalized Conjugated Porous Polymers as Robust and Reusable Photocatalysts for Controlled Radical Polymerization

Progress and Perspectives Beyond Traditional RAFT Polymerization

Heterogeneous photocatalytic reversible deactivation radical polymerization

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