Science China Materials最新文献_第10页

Efficient photo-induced RTP materials based on phenothiazine and polycyclic aromatic hydrocarbons: Tunable emission color and thermal stimulus response 基于吩噻嗪和多环芳烃的高效光诱导 RTP 材料：可调发射颜色和热刺激响应

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-09 DOI: 10.1007/s40843-024-2983-x

Jiayi Liang, Jie Yang, Yunsheng Wang, Mingda Shan, Zhenjiang Liu, Jia Ren, Manman Fang, Zhen Li

{"title":"Efficient photo-induced RTP materials based on phenothiazine and polycyclic aromatic hydrocarbons: Tunable emission color and thermal stimulus response","authors":"Jiayi Liang, Jie Yang, Yunsheng Wang, Mingda Shan, Zhenjiang Liu, Jia Ren, Manman Fang, Zhen Li","doi":"10.1007/s40843-024-2983-x","DOIUrl":"https://doi.org/10.1007/s40843-024-2983-x","url":null,"abstract":"The development of photo-responsive room temperature phosphorescence (RTP) materials has attracted more and more attention for their broad application prospects. Until now, it is still difficult to obtain the related materials with both high efficiency and long lifetime. And the lacking of emission in blue and red regions also largely restricts their further applications. In this work, we reported a new strategy to maintain both high efficiency and long lifetime in RTP luminogens through the integration of phenothiazine to facilitate n-π⋆ transition and polycyclic aromatic hydrocarbons (PAHs) dominated by π-π⋆ transition. When they were doped into polymer matrix, full color photo-induced RTP materials were obtained for the changed π-conjugation of PAHs. Among them, PTri@PVP showed the best RTP performance with phosphorescence efficiency of 20.73% and lifetime up to 819 ms. Specifically, after turning off the ultraviolet-visible (UV) irradiation upon this system, time-dependent phosphorescence afterglow from green to blue was exhibited, which was found to originate from two distinct molecular conformations and could be further regulated by thermal stimulus. Accordingly, multiple anti-counterfeiting applications, including screen printing, multi-color patterns and multi-dimensional information encryption, were successfully demonstrated.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review on flexible solar cells 柔性太阳能电池综述

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-08 DOI: 10.1007/s40843-023-2843-8

Shenglei Huang, Cheng Qian, Xingting Liu, Liping Zhang, Fanying Meng, Zhu Yan, Yinuo Zhou, Junlin Du, Bin Ding, Jianhua Shi, Anjun Han, Wenjie Zhao, Jian Yu, Xin Song, Zhengxin Liu, Wenzhu Liu

引用次数: 0

Regulation of photophysical and electronic properties of I–III–VI quantum dots for light-emitting diodes 调节发光二极管 I-III-VI 量子点的光物理和电子特性

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-08 DOI: 10.1007/s40843-024-2943-0

Xiaofei Dong, Xianggao Li, Shougen Yin, Zheng Li, Longwu Li, Jingling Li

{"title":"Regulation of photophysical and electronic properties of I–III–VI quantum dots for light-emitting diodes","authors":"Xiaofei Dong, Xianggao Li, Shougen Yin, Zheng Li, Longwu Li, Jingling Li","doi":"10.1007/s40843-024-2943-0","DOIUrl":"https://doi.org/10.1007/s40843-024-2943-0","url":null,"abstract":"Quantum dot light-emitting diodes (QLEDs) have become an important research direction in the pursuit of next-generation display technology owing to their favorable attributes, including high energy efficiency, wide color gamut, and low cost. Breakthroughs in the luminous efficiency and operating life of QLEDs have been achieved by enhancing the photoluminescence efficiency of the quantum dots (QDs) and optimizing the device structure. However, the current mainstream QDs contain heavy metal elements such as lead and cadmium, which restrict the development and application of QD displays. Exploring new types of environmentally friendly QDs is crucial. I–III–VI semiconductor QDs have been developed as luminescent materials for constructing high color rendering index QLEDs, owing to the outstanding photo-physical properties of these QDs, such as composition-dependent tunable bandgap, large Stokes shift, and high-efficiency luminescence. Currently, the microstructures of heterojunctions, especially the surface states and interface states, affect the recombination and transport of carriers in electroluminescent (EL) devices with multilayer thin film structures, which in turn influence the luminous efficiency and stability of the device. This review focuses on the synthesis strategies of I–III–VI multi-component QDs and provides an in-depth understanding of the luminescence mechanism and the regulation of photophysical and electronic properties. Furthermore, the application of I–III–VI QDs in multi-color and white EL QLEDs is discussed and the challenges and outlook are addressed.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tandem catalysis of Cu/Ni multi-sites promotes oxygen reduction reaction 铜/镍多位点串联催化促进氧还原反应

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-05 DOI: 10.1007/s40843-024-2952-2

Bin-Bin Feng, Ke-Ke Chang, Wan-Feng Xiong, Duan-Hui Si, Shui-Ying Gao, Hong-Fang Li, Rong Cao

{"title":"Tandem catalysis of Cu/Ni multi-sites promotes oxygen reduction reaction","authors":"Bin-Bin Feng, Ke-Ke Chang, Wan-Feng Xiong, Duan-Hui Si, Shui-Ying Gao, Hong-Fang Li, Rong Cao","doi":"10.1007/s40843-024-2952-2","DOIUrl":"https://doi.org/10.1007/s40843-024-2952-2","url":null,"abstract":"The special electronic characteristics and high atom usage efficiency of metal-nitrogen-carbon (M-N-C) materials have made them extremely attractive for oxygen reduction reactions (ORRs). However, it is inevitable that hydrogen peroxide (H2O2) will be formed via the two-electron pathway in ORRs. Herein, the Cu nanoparticles (NPs) have been encapsulated into Ni doped hollow mesoporous carbon spheres (Ni-HMCS) to reduce the generation of H2O2 in ORR. Electrochemical tests confirm that the introduction of Cu NPs improves the ORR performance greatly. The obtained Cu/Ni-HMCS exhibits a half-wave potential of 0.82 V vs. reversible hydrogen electrode and a limited current density of 5.5 mA cm−2, which is comparable with the commercial Pt/C. Moreover, Cu/Ni-HMCS has been used in Zn-air battery, demonstrating a high power density of 161 mW cm−2 and a long-term recharge capability (50 h at 5 mA cm−2). The theoretical calculation proposes a tandem catalysis pathway for Cu/Ni multi-sites catalysis, that is, H2O2 released from the Ni–N4 and Cu–N4 sites migrates to the Cu (111) face, on which the captive H2O2 is further reduced to H2O. This work demonstrates an interesting tandem catalytic pathway of dual-metal multi-sites for ORR, which provides an insight into the development of effective fuel cell electrocatalysts.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ZnO-ITO/WO3−x heterojunction structured memristor for optoelectronic co-modulation neuromorphic computation 用于光电协同调制神经形态计算的 ZnO-ITO/WO3-x 异质结结构忆阻器

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-05 DOI: 10.1007/s40843-024-2946-y

Jianyong Pan, Tong Wu, Wenhao Yang, Yang Li, Jiaqi Zhang, Hao Kan

{"title":"ZnO-ITO/WO3−x heterojunction structured memristor for optoelectronic co-modulation neuromorphic computation","authors":"Jianyong Pan, Tong Wu, Wenhao Yang, Yang Li, Jiaqi Zhang, Hao Kan","doi":"10.1007/s40843-024-2946-y","DOIUrl":"https://doi.org/10.1007/s40843-024-2946-y","url":null,"abstract":"Traditional transistors confront severe challenges of insufficient computing capability and excessive power consumption in large-scale neuromorphic systems. To address these critical bottlenecks, we propose an optoelectronic memristor based on zinc oxide-indium tin oxide/tungsten oxide (ZnO-ITO/WO3−x) heterojunctions as a promising solution. Through applying different types of electrical and optical signals, the device successfully emulates diverse synaptic functions including short-term/long-term synaptic plasticity, alongside short-term and long-term memory. Introducing the ZnO-ITO functional layer enhances the photoresponse of the WO3−x-based memristor and demonstrates “learning-forgetting-relearning” behavior under optical modulation. Furthermore, based on the photoelectric cooperative memristor array, a convolutional neural network for vehicle type recognition is constructed, which solves the problem of zero weight and negative weight complexity. In regard to energy efficiency, the neural network built with this device operates at a power level of only 10−3 W, representing a reduction of more than 4 orders of magnitude compared with a standard central processor. Hence, the photoelectric memristor proposed in this work provides a new idea for neuromorphic computing and is expected to promote the development of energy-efficient brain-like computing.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient charge relay steering in Pd nanoparticles coupled with the heterojunction for boosting CO2 photoreduction to C2H6 耦合异质结的钯纳米粒子中的高效电荷转移转向可促进 CO2 光还原为 C2H6

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-05 DOI: 10.1007/s40843-024-2995-0

Jiaojiao Fang, Chengyang Zhu, Lincan Fang, Yukai Chen, Huiling Hu, Yan Wu, Qingqing Chen, Junjie Mao

{"title":"Efficient charge relay steering in Pd nanoparticles coupled with the heterojunction for boosting CO2 photoreduction to C2H6","authors":"Jiaojiao Fang, Chengyang Zhu, Lincan Fang, Yukai Chen, Huiling Hu, Yan Wu, Qingqing Chen, Junjie Mao","doi":"10.1007/s40843-024-2995-0","DOIUrl":"https://doi.org/10.1007/s40843-024-2995-0","url":null,"abstract":"Solar-driven CO2 conversion to prepare value-added products is highly desirable but challenging. Central to the achievement of multi-carbon products via CO2 photoconversion is to break the bottlenecks of C–C coupling and multi-electron transfer. Herein, a charge relay system consisting of Pd-decorated BiOCl-wrapped CuBi2O4 is reported by taking advantage of the synergy of Pd nanoparticles (PdNPs) and heterojunction for efficient CO2-to-C2H6 photoconversion. The C2H6 production rate reached 167.1 µmol g−1 h−1 with the electron selectivity of 81.1% in the absence of any sacrificial agents. The spectroscopic characterizations indicated that BiOCl nanosheets, acting as the charge relay, directionally transferred the photogenerated electrons from itself and CuBi2O4 nanorods to PdNPs for C–C coupling. The coordinated ensemble of PdNPs and heterojunction significantly elevated the charge separation and transfer efficiency. Moreover, the in-situ spectroscopic analysis supported by theoretical simulations demonstrated that the electron-rich PdNPs generated by the charge relay of PdNPs and heterojunction optimized the CO2-to-C2H6 reaction pathway and reduced the energy barrier of the key *CHOCO intermediates. This work develops an innovative strategy to design the multifunctional catalysts for the photoconversion of CO2 to value-added carbon products.\u0000","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation into epitaxial growth optimization of a novel AlGaN/GaN HEMT structure for application in UV photodetectors 新型 AlGaN/GaN HEMT 结构的外延生长优化研究，用于紫外光检测器

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-05 DOI: 10.1007/s40843-024-2942-8

Zhiyuan Liu, Wanglong Wu, Xiong Yang, Menglong Zhang, Lixiang Han, Jianpeng Lei, Quansheng Zheng, Nengjie Huo, Xiaozhou Wang, Jingbo Li

{"title":"Investigation into epitaxial growth optimization of a novel AlGaN/GaN HEMT structure for application in UV photodetectors","authors":"Zhiyuan Liu, Wanglong Wu, Xiong Yang, Menglong Zhang, Lixiang Han, Jianpeng Lei, Quansheng Zheng, Nengjie Huo, Xiaozhou Wang, Jingbo Li","doi":"10.1007/s40843-024-2942-8","DOIUrl":"https://doi.org/10.1007/s40843-024-2942-8","url":null,"abstract":"In this work, a novel ultraviolet (UV) photodetector (PD) based on AlGaN/u-GaN/p-GaN/u-GaN heterojunction high electron mobility transistor (HEMT) has been developed. This HEMT epilayer is grown using the metal-organic chemical vapor deposition (MOCVD) technique, and the growth parameters, including the AlGaN growth temperature, preheating temperature of the p-GaN layer, and NH3/N2 flow rate, are optimized to improve the quality of the epilayer. The optimized epilayer exhibits a flat surface with a root mean square value of 0.146 nm and low dislocation density. The p-GaN thickness in epitaxial wafers has a significant influence on electrical and UV photoresponse. With a p-GaN of 1 µm, the UV PD demonstrates a significant switching ratio and transconductance of 107 and 127.3 mS mm−1, respectively. Acting as a UV PD, it also exhibits a high light on/off ratio (Ilight/Idark) of 6.35 × 105, a high responsivity (R) of 48.11 A W−1, and a detectivity (D*) of 6.85 × 1012 Jones under 365-nm UV illumination with light power density of 86.972 mW cm−2. The high-performance HEMT and UV detectors, which incorporate p-GaN etchless technology, have been refined through advancements in epitaxial growth and structural design. These improvements solidify the groundwork for large-scale manufacturing of UV communication systems and laser diodes.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deep-learning enabled atomic insights into the phase transitions and nanodomain topology of lead-free (K,Na)NbO3 ferroelectrics 利用深度学习从原子角度洞察无铅 (K,Na)NbO3 铁电体的相变和纳米域拓扑结构

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-05 DOI: 10.1007/s40843-024-2999-8

Xu Zhang, Bei Li, Ji Zou, Hanxing Liu, Ben Xu, Kai Liu

{"title":"Deep-learning enabled atomic insights into the phase transitions and nanodomain topology of lead-free (K,Na)NbO3 ferroelectrics","authors":"Xu Zhang, Bei Li, Ji Zou, Hanxing Liu, Ben Xu, Kai Liu","doi":"10.1007/s40843-024-2999-8","DOIUrl":"https://doi.org/10.1007/s40843-024-2999-8","url":null,"abstract":"Lead-free KxNa1−xNbO3 (KNN) perovskites have garnered increasing attention due to their exceptional ferropiezoelectric properties, which are effectively tuned via polymorphic structures and domain dynamics. However, atomic insights into the underlying nanomechanisms governing the ferroelectricity of KNNs amidst varying factors such as composition, phase, and domain are still imperative. Here, we perform molecular dynamics simulations of phase transitions and domain dynamics for KNNs with various K/Na ratios (x = 0.25∼1.0) by using ab-initio accuracy deep learning potential (DP). As a demonstration of its transferability, the newly developed DP model shows quantum accuracy in terms of the equation of states, elastic constants, and phonon dispersion relations for various KNbO3 and K0.5Nb0.5O3. Furthermore, intricate temperature-dependent phase transitions and domain formation of KNNs are extensively and quantitatively captured. Simulations indicate that for KNNs with compositions x ranging from 0.25 to 1.0, the paraelectric-to-ferroelectric phase transition of KNNs is driven primarily by the order-disorder effect, while the displacive effect is dominant in the subsequent ferroelectric phase transitions. Specifically, flux-closure or herringbone-like nanodomain patterns arranged with 90° domain walls formed close to the experimental observations. Detailed analyses reveal that favorable 90° domain wall formation becomes more challenging with increasing Na content due to distinct oxygen octahedron distortion arising from the different ionic radii of K/Na atoms. It is envisioned that the combination of unified DP and atomistic simulations will help offer a robust solution for more accurate and efficient in silico explorations of complex structural, thermodynamic, and ferroelectric properties for relevant energy storage and conversion materials.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141740885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An organometallic salt as the electrolyte additive to regulate lithium polysulfide redox and stabilize lithium anodes for robust lithium-sulfur batteries 以有机金属盐作为电解质添加剂，调节多硫化锂的氧化还原并稳定锂阳极，从而制造出坚固耐用的锂硫电池

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-04 DOI: 10.1007/s40843-024-2969-3

Yixuan Meng, Meifang Zhang, Youliang Wang, Chen Liu, Ze Zhang, Ji Yu, Jianxin Cai, Zhenyu Yang

{"title":"An organometallic salt as the electrolyte additive to regulate lithium polysulfide redox and stabilize lithium anodes for robust lithium-sulfur batteries","authors":"Yixuan Meng, Meifang Zhang, Youliang Wang, Chen Liu, Ze Zhang, Ji Yu, Jianxin Cai, Zhenyu Yang","doi":"10.1007/s40843-024-2969-3","DOIUrl":"https://doi.org/10.1007/s40843-024-2969-3","url":null,"abstract":"Lithium-sulfur (Li-S) batteries with high theoretical specific energy are considered to be one of the highly promising next-generation energy storage systems. However, the shuttle effect of lithium polysulfides (LiPSs) and the interfacial instability of Li anodes have seriously hindered the practical application of Li-S batteries. Optimizing the electrolyte composition with additives can significantly improve the battery performance and has attracted great attention. Herein, we propose an organometallic salt, i.e., nickel bromide dimethoxyethane (NiBr2DME), as an electrolyte additive, which serves as the dual function of regulating LiPSs redox and synchronously stabilizing Li anodes. We reveal that NiBr2DME can interact with LiPSs via Ni–S and Li–Br bonds, and accelerate the mutual transformation of LiPSs, thus reducing the accumulation of LiPSs in the electrolyte. In addition, NiBr2DME can form a stable LiBr-containing interfacial layer on the Li metal surface, and promote the uniform electrodeposition of Li+ ions, and inhibit the formation of Li dendrites. Thus, Li-S batteries with a concentration of 0.5 mmol L−1 NiBr2DME show an initial capacity of 919.8 mAh g−1 at 0.2 C, and a high capacity retention of 89.3% after 100 cycles. Even at the 4 C rate, a high discharge capacity of 602.9 mAh g−1 is achieved. Surprisingly, the good cycling performance is maintained under poor electrolyte conditions with sulfur loading of 4.8 mg cm−2 and electrlyte/sulfur ratio of 5 µL mg−1. This work provides a positive solution to achieve the suppression of shuttle effect, the regulation of LiPSs redox and the stabilization of Li anodes.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141576470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Organic polymorphic crystals with multi-stimuli response: excellent mechanical elasticity, novel two-stage heterotropic photochromism and self-reversible acidichromism 具有多重刺激响应的有机多晶体：卓越的机械弹性、新颖的两阶段各向异性光致变色和自可逆酸致变色

IF 8.1 2区材料科学

Science China Materials Pub Date : 2024-07-04 DOI: 10.1007/s40843-024-3003-5

Yutong Yao, Ting Wang, Hui Yu, Zhicheng Jiang, Wenbo Wu, Hongtu Zhao, Hongchang Wu, Na Wang, Xin Huang, Hongxun Hao

{"title":"Organic polymorphic crystals with multi-stimuli response: excellent mechanical elasticity, novel two-stage heterotropic photochromism and self-reversible acidichromism","authors":"Yutong Yao, Ting Wang, Hui Yu, Zhicheng Jiang, Wenbo Wu, Hongtu Zhao, Hongchang Wu, Na Wang, Xin Huang, Hongxun Hao","doi":"10.1007/s40843-024-3003-5","DOIUrl":"https://doi.org/10.1007/s40843-024-3003-5","url":null,"abstract":"Smart multi-stimuli responsive organic materials have become increasingly favored due to their advantages of high stability and easy regulation. In this study, a cyanostilbene derivative ((αZ)-2-chloro-α-[(4-methoxyphenyl)methylene]-5-pyridinehyde, TAR) was successfully synthesized, and its polymorphs (TAR-1 and TAR-2) exhibited multiple responsive behaviors under different stimulus conditions. TAR-1 is supposed to have excellent mechanical properties, while TAR-2 shows fascinating heterotropic photochromism (green-cyan-yellow) under different intensities of ultraviolet (UV) irradiation, which has never been reported in previous studies. Further investigation revealed that this was attributed to different degrees of [2+2] cycloaddition induced by UV light. In addition, both polymorphs could be protonated during Trifluoroacetic acid fuming and deprotonate automatically after fuming, accompanied by the significant variation in fluorescence. Finally, two scenarios were designed based on their unique stimuli-responsive properties, which proved their promising potential in fields of information security and anti-counterfeiting encryption.","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141576472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0