Catalyst‐Free Dynamic Covalent C=C/C=N Metathesis Reaction for Associative Covalent Adaptable Networks DOI

Pengyun Li,

Xin Jiang, Ruirui Gu

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: June 3, 2024

Abstract Covalent adaptable networks (CANs), leveraging the dynamic exchange of covalent bonds, emerge as a promising material to address challenge irreversible cross‐linking in thermosetting polymers. In this work, we explore introduction catalyst‐free and associative C=C/C=N metathesis reaction into polyurethanes, creating CANs with superior stability, solvent resistance, thermal/mechanical properties. By incorporating reaction, stress‐relaxation is significantly accelerated compared imine‐bond‐only networks, rate adjustable by modifying substituents ortho position double bonds. The obtained plasticity enables recycle without altering chemical structure or mechanical properties, also found be vital for achieving shape memory functions complex spatial structures. This new crosslinker polymer has potential accelerate ongoing exploration malleable functional thermoset

Language: Английский

Dual‐Mode Hydrogels with Structural and Fluorescent Colors toward Multistage Secure Information Encryption DOI
Yucheng Sun, Xiaoxia Le, Hui Shang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(28)

Published: May 14, 2024

Abstract Constructing an anti‐counterfeiting material with non‐interference dual optical modes is effective way to improve information security. However, it remains challenging achieve multistage secure encryption due the limited stimulus responsiveness and color tunability of current dual‐mode materials. Herein, a hydrogel both independently tunable structural fluorescent colors toward encryption, reported. In this system, rigid lamellar structure poly(dodecylglyceryl itaconate) (pDGI) formed by shear flow‐induced self‐assembly provides restricted domains wherein monomers undergo polymerization form network, producing color. The introduction monomer 6‐acrylamidopicolinate (6APA) as complexation site possibility formation. hydrogel's angle‐dependent can be controlled adjusting crosslinking density water content. Additionally, fluorescence modulated ratio lanthanide ions. Information displayed separately in different channels synergistically overlayed read ultimate message. Thus, system based on devised through programed decryption process. This strategy holds tremendous potential platform for encrypting safeguarding valuable authentic field anti‐counterfeiting.

Language: Английский

Citations

36
Room temperature phosphorescence materials based on small organic molecules: Design strategies and applications DOI Creative Commons
Meixia He, C. G. Ding, Hexiang Guo

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 2(3)

Published: July 23, 2024

Abstract Room‐temperature phosphorescence (RTP) materials have attracted significant attention due to their applications in various fields such as information storage and encryption, organic light‐emitting diode (OLED), sensing, lighting display, biological imaging, photodynamic therapy. Traditionally, RTP can be efficiently developed using inorganic systems with noble metals or rare earth elements. Recently, many efforts been devoted the development of based on small molecules. The strategies construct include hydrogen bonding, heavy atom effect, n –π* transitions, π–π stacking, donor–acceptor host–guest doping. Herein, we summarize recent examples molecules primarily focusing design properties. Moreover, promising OLED, well bio‐imaging phototherapy are discussed. challenges perspectives given provide inspiration toward future materials.

Language: Английский

Citations

12
Toward Practical Single‐Molecule/Atom Switches DOI Creative Commons

Xiaona Xu,

Chunyan Gao,

E. Ramya

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(29)

Published: May 29, 2024

Abstract Electronic switches have been considered to be one of the most important components contemporary electronic circuits for processing and storing digital information. Fabricating functional devices with building blocks atomic/molecular can greatly promote minimization meet requirement high integration. This review highlights key developments in fabrication application molecular switching devices. overview offers valuable insights into mechanisms under various stimuli, emphasizing structural energy state changes core molecules. Beyond switches, typical individual metal atomic are further introduced. A critical discussion main challenges realizing developing practical molecular/atomic is provided. These analyses summaries will contribute a comprehensive understanding switch mechanisms, providing guidance rational design nanoswitch toward applications.

Language: Английский

Citations

10
Biosensing materials for monoclonal antibody detection: An overview DOI Creative Commons
Yuxin Zhang, Fang Fan,

Yifeng Chai

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 2(2)

Published: May 1, 2024

Abstract Considering the continuous advances in synthesis and clinical applications of monoclonal antibodies (mAbs), precision therapies that employ mAbs are essential. In recent years, extensive efforts have been invested developing novel strategies or technologies for detection mAbs. Given availability advanced biosensing materials, various assemblies multifunctional materials can be prepared by intelligent design when evaluating targets This article provides an overview functional mAb detection. Subsequently, we present approaches which receptors combined with to construct stimulus‐responsive analytical platforms evaluate contents activities biological systems, enabling real‐time monitoring diagnosis could facilitate administration during treatment. Furthermore, review examines implications real‐world contexts; it also discusses ongoing challenges future prospects.

Language: Английский

Citations

7
Advances in 4D printing of biodegradable photopolymers DOI Creative Commons
Yue Ma, Chih‐Jen Shih, Yinyin Bao

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 2(3)

Published: June 5, 2024

Abstract Over the past decade, 4D printing has revolutionized field of advanced manufacturing by fabricating structures that dynamically respond to environmental stimuli. During this process, shape‐memory polymers (SMPs) stand out, enabling transformations triggered temperature, light, or other factors, and show great potential for applications in biomedicine beyond. Notably, biodegradable SMPs offer a compelling advantage medical devices due their ability adapt within body's temperature range be absorbed tissues, reducing risks associated with permanent implants. While extrusion techniques have laid groundwork biomedicine, vat photopolymerization methods like stereolithography digital light processing are now at forefront, favored high resolution flexibility material design. However, search suitable materials these continues, current research focusing on developing systems meet both mechanical demands degradation profiles required applications. This review aims critically analyze advancements photopolymers, particularly elastomers, discuss challenges lie ahead clinical translation.

Language: Английский

Citations

7
Closed‐Loop Recyclable Poly(ester‐disulfide)s for Potential Alternatives to Engineering Plastic DOI
Meng Chen,

Rulin Yang,

Huiping Wu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)

Published: June 21, 2024

Facile fabrication, low material complexity and closed-loop recycling are essential for polymer plastics to alter their linear product economy towards a cradle-to-cradle one. Covalent adaptable networks (CANs) one way achieve that, which intrinsically exhibit decent mechanical properties like the thermosets but could also be easily recycled thermoplastics. In this work, we introduce rigid ester structural motifs into dynamic poly(disulfide)s form series of dual networks. Owning coherence soft/rigid segments reversible sacrificial crosslinking, they tailorable good resistance different chemicals. Their is achieved via mild solvolysis, maintaining materials' integrities. It offers solution as sustainable replacement engineering massively under production hard recycled.

Language: Английский

Citations

7
Catalyst‐Free Dynamic Covalent C=C/C=N Metathesis Reaction for Associative Covalent Adaptable Networks DOI

Pengyun Li,

Xin Jiang, Ruirui Gu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: June 3, 2024

Covalent adaptable networks (CANs), leveraging the dynamic exchange of covalent bonds, emerge as a promising material to address challenge irreversible cross-linking in thermosetting polymers. In this work, we explore introduction catalyst-free and associative C=C/C=N metathesis reaction into polyurethanes, creating CANs with superior stability, solvent resistance, thermal/mechanical properties. By incorporating reaction, stress-relaxation is significantly accelerated compared imine-bond-only networks, rate adjustable by modifying substituents ortho position double bonds. The obtained plasticity enables recycle without altering chemical structure or mechanical properties, also found be vital for achieving shape memory functions complex spatial structures. This new crosslinker polymer has potential accelerate ongoing exploration malleable functional thermoset

Language: Английский

Citations

6
Responsive Organic Fluorescent Aggregates Based on Ion‐π Interactions Away from Fluorescent Conjugated Groups DOI Creative Commons

Guanqun Zhu,

Zhiyang Liu, Qi Qi

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(29)

Published: May 7, 2024

Responsive organic luminescent aggregates have a wide range of application fields, but currently there is still lack reasonable molecular design strategies. Introducing ion-π interactions into molecules can effectively alter their properties. However, current research typically focuses on ion localization at conjugated groups with the strong interaction forces. In this work, we introduce flexible alkoxy chain spacers between fluorescent and sites, then adjust fluorescence performance molecule by changing strength interactions. Bromine ion-based exhibit high stable quantum yields in crystals amorphous powders under external stimuli. Hexafluorophosphate weak yield very low powders, showing variable intensities This demonstrates new class responsive solid-state materials.

Language: Английский

Citations

5
Synthesis and Characteristics of Smart Coating Materials for Reversible Double Stimulus-Responsive Oil–Water Separation DOI

Qi Zhang,

Haoqian Wang,

Lu Qiu

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(11), P. 6482 - 6494

Published: May 17, 2024

The developed smart coating for water–oil separation, characterized by its mild separation conditions, ease of control, and absence secondary pollution, holds promising potential applications in controlled liquid transmission, oil–water textiles, biosensing films. This work focused on synthesizing copolymers that respond to both photon pH stimuli. Initially, 4-trifluoromethoxy-4′-methacryloxyazobenzene (FMAB) similar monomers, serving as photon-responsive units with varying carbon chain lengths, were synthesized using different synthetic routes. Such a design approach also aimed enhance the hydrophobic characteristics photoresponsive segments certain degree. Theoretically, impact carbonyl position nucleophilic substitution reactions was investigated through density functional theory (DFT) calculations. These monomers subsequently copolymerized individually dimethylaminoethyl methacrylate (DMAEMA), which acts pH-responsive unit, reversible addition–fragmentation transfer (RAFT) technique one-step copolymerization process. polymers coated onto glass slides form films, contact angles could be modulated response light To highlighted, maximum angle change can reach 131° under double stimulation. ultimately showcase capabilities, polymer combined nonwoven fabric create membrane. membrane is capable reversibly transitioning between hydrophilic–lipophobic hydrophobic–lipophilic states, demonstrating substantial future advancements efficient separation.

Language: Английский

Citations

5
Fish Scale-Inspired β-Cyclodextrin Cross-Linked Polyacrylamide Hydrogels for Oil–Water Separation DOI

Qi Zhang,

Wenjing Chen, Jinyan Zuo

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(11), P. 17389 - 17397

Published: March 5, 2025

Cyclodextrins (CDs), a low-polysaccharide class, possess hydrophilic outer surface due to their hydroxyl groups, which can be functionalized for various applications. In this study, the groups on β-cyclodextrin were with acrylates (CD-A) and subsequently used as cross-linker in copolymerization acrylamide form polyacrylamide-cyclodextrin hydrogel (PAC). Compared polyacrylamide (PAM), PAC exhibited enhanced water absorption abilities mechanical strength. Inspired by fish scales' structural properties, microporous stainless steel meshes coated PAC, we could demonstrate an excellent oil-water separation superhydrophilicity underwater superoleophobicity. The mesh effectively separated mixtures using gravity filtration, achieving efficiencies of over 99%. Repeated use different oil types confirmed durability effectiveness hydrogel-coated practical applications separation.

Language: Английский

Citations

0