Photocontrollable liquid-crystalline block copolymers: design, photo-directed self-assembly and applications

Cai, Feng; Yang, Bowen; Yu, Mingming; Zeng, Songshan; Yu, Haifeng

doi:10.1039/d2tc05134f

Cited by 8 publications

(2 citation statements)

References 137 publications

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“…It has been discussed that COFs and ZnO quantum dots (QDs) combined by covalent bonds are applied as anode materials for the zinc-nickel batteries. [138] The prepared COFs provide an efficient channel for ion transport, regulating the concentration gradient of Zn(OH) 4 2− , thus slowing down deformation and dendrite growth. Small-sized QDs have large specific surface area, which can completely contact with electrolyte, facilitating the electrochemical reaction.…”

Section: Application Of Cof-correlated Materials In Other Zbbsmentioning

confidence: 99%

Engineering Covalent Organic Frameworks Toward Advanced Zinc‐Based Batteries

Zhang,

Zhi,

Zhang

et al. 2024

Advanced Materials

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Zinc–based batteries (ZBBs) have demonstrated considerable potential among secondary batteries, attributing to their advantages including good safety, environmental friendliness, and high energy density. However, ZBBs still suffer from issues such as the formation of zinc dendrites, occurrence of side reactions, retardation of reaction kinetics, and shuttle effects, posing a great challenge for practical applications. As promising porous materials, covalent organic frameworks (COFs) and their derivatives have rigid skeletons, ordered structures, and permanent porosity, which endow them with great potential for application in ZBBs. This review, therefore, provides a systematic overview detailing on COFs structure pertaining to electrochemical performance of ZBBs, following an in–depth discussion of the challenges faced by ZBBs, which includes dendrites and side reactions at the anode, as well as dissolution, structural change, slow kinetics and shuttle effect at the cathode. Then, the structural advantages of COF–correlated materials and their roles in various ZBBs are highlighted. Finally, the challenges in the application of COF–correlated materials in ZBBs are outlined and an outlook on the future development of COF–correlated materials for using in ZBBs is provided. The review would serve as a valuable reference for further research into the utilization of COF–correlated materials in ZBBs.This article is protected by copyright. All rights reserved

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Section: Application Of Cof-correlated Materials In Other Zbbsmentioning

confidence: 99%

Engineering Covalent Organic Frameworks Toward Advanced Zinc‐Based Batteries

Zhang,

Zhi,

Zhang

et al. 2024

Advanced Materials

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“…The architecture of azo polymers plays an important role in their photoresponsive properties, functions, and applications. Considering the chemical structure of polymer backbone forming azo system, they can be divided into three groups, that is, aliphatic (for example based on PMMA 15 or based on PS-b-PMMA 16 ), aliphatic–aromatic and aromatic (for example azo polyimides 17 – 19 ) azo polymers. Recently, new aliphatic azobenzene, both functionalized and supramolecular (co)polymers have been developed 20 , 21 .…”

Section: Introductionmentioning

confidence: 99%

Photoresponse of new azo pyridine functionalized poly(2-hydroxyethyl methacrylate-co-methyl methacrylate)

Konieczkowska,

Neugebauer,

Kozanecka-Szmigiel

et al. 2024

Sci Rep

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A new azo polymer containing photoisomerizable azo pyridine functionalities was synthesized via Mitsunobu reaction of 4-(4-hydroxyphenylazo)pyridine with poly(2-hydroxyethyl methacrylate-co-methyl methacrylate) (p(HEMA-co-MMA)) for creating new photochromic materials. The resulting polymer with azo pyridine side groups was characterized for structural, thermal, and optical properties. UV–vis, 1H NMR and IR spectroscopies confirmed that all hydroxyl groups in p(HEMA-co-MMA) were substituted with azo dye. The obtained azo copolymer exhibited high thermal stability (around 240 °C) and a glass transition temperature (113 °C), promising for applications. The trans-to-cis isomerization upon UV irradiation and the thermal back reaction of the azo chromophore in the copolymer in the solid state was studied. A photostationary state with 50% content of cis-isomers upon 6 min of UV irradiation was reached, and during 48 h dark relaxation at ambient temperature, all cis-isomers converted to the trans form. Additionally, the possibility of efficient photogeneration of surface relief gratings with high amplitude of azo copolymer surface modulation was demonstrated.

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Localized and Limited‐Dispersive Delivery of Thermal Stimuli to Liquid Crystal Oligomer Networks Through Radio‐Frequency Media

Astam,

Verheesen,

Lyu

et al. 2024

Adv Funct Materials

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Wireless energy transmission (WET) promises to enhance device mobility through selective and untethered energy delivery. In this paper, WET principles are harnessed to directly and non‐dispersively transfer thermal stimuli to designated areas within thermally‐responsive liquid crystal oligomer networks (LCONs). For this, a conductive coil receiver within the LCON as a remote stimuli source is embedded. Upon activation by radio‐frequency WET, targeted Joule heating occurs and the low thermal conductivity of LCONs causes retention of delivered stimulus at the receiver, generating temperature differences of up to 45 °C within the host LCON. This enables localized LCON actuation and self‐regulated oscillations with a natural frequency of ≈0.027 Hz. WET selectivity is further demonstrated within self‐pressing buttons for keyboards, where actuation only in designated areas is required for operation. The work is envisioned to contribute toward remote material‐based logic for hybrid circuit designs for medical, soft robotic, and haptic applications.

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Photocontrollable liquid-crystalline block copolymers: design, photo-directed self-assembly and applications

Cited by 8 publications

References 137 publications

Engineering Covalent Organic Frameworks Toward Advanced Zinc‐Based Batteries

Engineering Covalent Organic Frameworks Toward Advanced Zinc‐Based Batteries

Photoresponse of new azo pyridine functionalized poly(2-hydroxyethyl methacrylate-co-methyl methacrylate)

Localized and Limited‐Dispersive Delivery of Thermal Stimuli to Liquid Crystal Oligomer Networks Through Radio‐Frequency Media

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