Synthesis of thermo-sensitive polymers with super narrow molecular weight distributions: PET-RAFT polymerization of <i>N</i>-isopropyl acrylamide mediated by cross-linked zinc porphyrins with high active site loadings

Li, Fanfan; Yu, Young Moon; Lv, Hanyu; Cai, Guiting; Zhang, Yanwu

doi:10.1039/d0py01643h

Cited by 7 publications

(3 citation statements)

References 58 publications

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“…The potential of PNIPAM in controlled release has been widely explored; among them, a great number of structures (e.g., microgel, , hollow structures, , core–shell particles, , and brushes on particles and flat surface − ) have been successfully prepared via various methodologies but similar function mechanisms. In our system, NIPAM was selected due to its compatibility with the PET-RAFT approach − and narrow transition temperature.…”

Section: Resultsmentioning

confidence: 99%

3D Temperature-Controlled Interchangeable Pattern for Size-Selective Nanoparticle Capture

Ge,

Cheng,

Rong

et al. 2024

ACS Appl. Mater. Interfaces

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Patterned surfaces with distinct regularity and structured arrangements have attracted great interest due to their extensive promising applications. Although colloidal patterning has conventionally been used to create such surfaces, herein, we introduce a novel 3D patterned poly(N-isopropylacrylamide) (PNIPAM) surface, synthesized by using a combination of colloidal templating and surface-initiated photoinduced electron transfer-reversible addition–fragmentation chain transfer (SI-PET-RAFT) polymerization. In order to investigate the temperature-driven 3D morphological variations at a lower critical solution temperature (LCST) of ∼32 °C, multifaceted characterization techniques were employed. Atomic force microscopy confirmed the morphological transformations at 20 and 40 °C, while water contact angle measurements, upon heating, revealed distinct trends, offering insights into the correlation between surface wettability and topography adaptations. Moreover, quartz crystal microbalance with dissipation monitoring and electrochemical measurements were employed to detect the topographical adjustments of the unique hollow capsule structure within the LCST. Tests using different sizes of PSNPs shed light on the size-selective capture–release potential of the patterned PNIPAM, accentuating its biomimetic open–close behavior. Notably, our approach negates the necessity for expensive proteins, harnessing temperature adjustments to facilitate the noninvasive and efficient reversible capture and release of nanostructures. This advancement hopes to pave the way for future innovative cellular analysis platforms.

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Section: Resultsmentioning

confidence: 99%

3D Temperature-Controlled Interchangeable Pattern for Size-Selective Nanoparticle Capture

Ge,

Cheng,

Rong

et al. 2024

ACS Appl. Mater. Interfaces

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“…Cross-linking between hydroxyterminated porphyrins and dichlorodimethylsilanes provided twisted 3D structures with open catalytic sites. 253,254 The effective catalytic performance was ascribed to the large surface area of catalytically active sites, prevention of aggregation of porphyrins and concomitant reduction of quenching of excited-state porphyrins.…”

Section: Pcs For Polymerizationmentioning

confidence: 99%

Photocontrolled RAFT polymerization: past, present, and future

2023

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“…Using dichlorodimethylsilane and dichlorodiphenylsilane, the cross-linking of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin zinc (ZnTHP) resulted in the synthesis of twisted ZnTHP-Me 2 Si and layered ZnTHP-Ph 2 Si. 52 The high active site loadings of these materials, coupled with their superior photocatalytic performance in the PET-RAFT polymerization of N-isopropylacrylamide (NIPAm) under green light, illustrate the appealing features of living polymerization and distinguish them from ZnTHP. Additionally, the more pronounced pore distribution and larger surface area of twisted ZnTHP-Me 2 Si contribute to its superior efficiency in accelerating NIPAm polymerization.…”

Section: ■ Introductionmentioning

confidence: 99%

Unleashing the Power of PET-RAFT Polymerization: Journey from Porphyrin-Based Photocatalysts to Combinatorial Technologies and Advanced Bioapplications

Zhu,

Wang,

et al. 2024

Biomacromolecules

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The emergence of photoinduced energy/electron transfer−reversible addition−fragmentation chain transfer polymerization (PET-RAFT) not only revolutionized the field of photopolymerization but also accelerated the development of porphyrin-based photocatalysts and their analogues. The continual expansion of the monomer family compatible with PET-RAFT polymerization enhances the range of light radiation that can be harnessed, providing increased flexibility in polymerization processes. Furthermore, the versatility of PET-RAFT polymerization extends beyond its inherent capabilities, enabling its integration with various technologies in diverse fields. This integration holds considerable promise for the advancement of biomaterials with satisfactory bioapplications. As researchers delve deeper into the possibilities afforded by PET-RAFT polymerization, the collaborative efforts of individuals from diverse disciplines will prove invaluable in unleashing its full potential. This Review presents a concise introduction to the fundamental principles of PET-RAFT, outlines the progress in photocatalyst development, highlights its primary applications, and offers insights for future advancements in this technique, paving the way for exciting innovations and applications.

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Synthesis of thermo-sensitive polymers with super narrow molecular weight distributions: PET-RAFT polymerization of N-isopropyl acrylamide mediated by cross-linked zinc porphyrins with high active site loadings

Abstract: To overcome aggregation of porphyrins and realize heterogeneous catalysis with high active site loadings, the twisted ZnTHP-Me2Si and layered ZnTHP-Ph2Si are synthesized through cross-linking zinc tetraphenylporphyrin (ZnTHP) respectively with dichlorodimethylsilane...

Cited by 7 publications

References 58 publications

3D Temperature-Controlled Interchangeable Pattern for Size-Selective Nanoparticle Capture

3D Temperature-Controlled Interchangeable Pattern for Size-Selective Nanoparticle Capture

Photocontrolled RAFT polymerization: past, present, and future

Unleashing the Power of PET-RAFT Polymerization: Journey from Porphyrin-Based Photocatalysts to Combinatorial Technologies and Advanced Bioapplications

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