Chemical Engineering Journal, Год журнала: 2024, Номер 485, С. 149886 - 149886
Опубликована: Фев. 22, 2024
Язык: Английский
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(12)
Опубликована: Янв. 24, 2024
Abstract Achieving circularly polarized organic ultralong room‐temperature phosphorescence (CP‐OURTP) with a high luminescent dissymmetry factor (g lum ) is crucial for diverse optoelectronic applications. In particular, dynamically controlling the of CP‐OURTP can profoundly advance these applications, but it still unprecedented. This study introduces an effective strategy to achieve photoirradiation‐driven chirality regulation in bilayered structure film, which consists layer soft helical superstructure incorporated light‐driven molecular motor and phosphorescent (RTP) polymer. The prepared film exhibits emission lifetime 805 ms g value up 1.38. Remarkably, resulting be reversibly controlled between 0.6 1.38 over 20 cycles by light irradiation, representing first example CP‐OURTP.
Язык: Английский
Процитировано
30
Advanced Materials, Год журнала: 2024, Номер 36(16)
Опубликована: Янв. 12, 2024
Stimuli-responsive circularly polarized luminescence (CPL) materials show great promise in applying information encryption and anticounterfeiting. Herein, light-driven CPL sign inversion is achieved by combining a photoresponsive achiral negative dichroic dye (KG) static positive (NR) as dopants at the 0.5:0.5 weight ratio into cholesteric liquid crystal (CLC) host. The side chains of KG undergo trans/cis isomerization after 365 nm UV light irradiation, leading to dichroism (S
Язык: Английский
Процитировано
25
Advanced Materials, Год журнала: 2024, Номер 36(32)
Опубликована: Июнь 7, 2024
Abstract Photochromic molecules have remarkable potential in memory and optical devices, as well driving manipulating molecular motors or actuators many other systems using light. When photochromic are introduced into carbon nanomaterials (CNMs), the resulting hybrids provide unique advantages create new functions that can be employed specific applications devices. This review highlights recent developments diverse CNMs. CNMs also introduced. The fundamentals of different discussed, including design principles types interactions between via covalent non‐covalent bonding such π−π stacking, amphiphilic, electrostatic, hydrogen bonding. Then properties CNMs, e.g., photopatterning, fluorescence modulation, actuation, photoinduced surface‐relief gratings, their energy storage (solar thermal fuels, photothermal batteries, supercapacitors), nanoelectronics (transistors, junctions, photo‐switchable conductance, electron transfer), sensors, bioimaging highlighted. Finally, an outlook on challenges opportunities future is presented. discusses a vibrant interdisciplinary research field expected to stimulate further nanoscience, advanced nanotechnology, intelligently responsive materials,
Язык: Английский
Процитировано
20
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Май 23, 2024
Abstract Inspired by intriguing color changeable ability of natural animals, the design and fabrication artificial mechanochromic materials capable changing colors upon stretching or pressing have attracted intense scientific interest. Liquid crystal (LC) is a self‐organized soft matter with anisotropic molecular alignment. Due to sensitivity various external stimulations, LC has been considered as an emerging appealing responsive building block construct intelligent advanced devices. Recently, becoming hot topic in multifields from flexible skins visualized sensors smart biomimetic In this review, recent progress LCs comprehensively summarized. Firstly, mechanism functionalities introduced, followed preparation functional based on LCs. Then applications are provided. Finally, conclusion outlooks field given. This overview hoped provide inspiration for scientists engineers multidisciplines including science, elastomers, chemistry, physical science.
Язык: Английский
Процитировано
19
Deleted Journal, Год журнала: 2024, Номер 2(2)
Опубликована: Май 1, 2024
Abstract Chirality is a fundamental property in nature, which essential for the existence and survival of living organisms. Smart responsive chiroptical materials have garnered increasing attention due to their unique structural characteristics potential applications. Among these, azobenzene (Azo), as typical photoresponsive chromophore, plays crucial role constructing controlling chiral structures. The cis ‐ trans isomerization, liquid crystallinity, other physicochemical properties allow wide range tunability stimuli‐responsive materials. Herein, we review research studies field chiral/achiral Azo building blocks multilevel generation well switching, summarize recent advances on applications structures from micro macro levels. Finally, aim provide an overview challenges new opportunities development novel smart
Язык: Английский
Процитировано
13
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(7), С. 9323 - 9332
Опубликована: Фев. 9, 2024
Chiral luminescent liquid crystals have attracted widespread attention from researchers due to their unique advantages in constructing circularly polarized (CPL) materials with large asymmetry factor (glum) values. However, how effectively prepare nondoped CPL chiral remains a challenge. In this article, we developed an effective and universal method crystal materials. To achieve our strategy, copolymerized monomer M0Mt α-cyanostilbene-based monomers MmPVPCN (m = 6, 8, 10) bearing different flexible spacer lengths obtain series of copolymers poly(MmPVPCN(x)-co-M0Mt(y)). Under the induction component, α-cyanostilbene component assembles form crystals. Meanwhile, also exhibits aggregation-induced emission enhancement characteristics. Therefore, help selective reflection effect crystals, copolymer films can emit efficient CPL. For poly(M8PVPCN(0.85)-co-M0Mt(0.15)), glum solid luminescence quantum yield −2.61 × 10–2 25.04%, respectively. addition, by altering chemical structure copolymers, phase be controlled, thereby regulating properties.
Язык: Английский
Процитировано
12
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(16)
Опубликована: Фев. 13, 2024
Abstract Improving the photoswitching rate and robustness of photochromic molecules in bulk solids is paramount for practical applications but remains an on‐going challenge. Here, we introduce octupolar design paradigm to develop a new family visible light organic photoswitches, namely multi‐branched Stenhouse Adducts (MOPSAs) featuring C 3 ‐symmetrical A ‐(D‐core) architecture with dipolar donor–acceptor (D–A) photochrome each branch. Our couples multi‐dimensional geometric electronic effects MOPSAs enable robust ultrafast reversible polymers. Specifically, optimal MOPSA (4 wt %) commercial polyurethane films accomplishes nearly 100 % discoloration 6 s under ∼ thermal‐recovery 17.4 at 60 °C, while acquired kinetics constants are 3∼7 times that DASA counterpart 1∼2 orders magnitude higher than those reported DASAs Importantly, MOPSA‐doped polymer sustain 500 discoloration/recovery cycles slow degradation, superior existing polymers (≤30 cycles). We discover multi‐dipolar coupling enables enhanced polarization electron delocalization, promoting rate‐determining thermal cyclization, branched non‐planar geometry induces large free volume facilitate isomerization. This can be extended spiropyran or azobenzene‐based films. The performance together their high‐yield scalable synthesis facile film processing inspires us explore versatile uses as smart inks labels time‐temperature indicators, optical logic encryption multi‐levelled data encryption.
Язык: Английский
Процитировано
12
Science China Chemistry, Год журнала: 2024, Номер 67(8), С. 2719 - 2727
Опубликована: Июль 1, 2024
Язык: Английский
Процитировано
12
Nano Today, Год журнала: 2024, Номер 55, С. 102197 - 102197
Опубликована: Фев. 9, 2024
Язык: Английский
Процитировано
9
Journal of Colloid and Interface Science, Год журнала: 2024, Номер 663, С. 707 - 715
Опубликована: Фев. 29, 2024
Язык: Английский
Процитировано
9