Materials Chemistry Frontiers最新文献_第8页

Asymmetric deep-blue tetrafluorobenzene-bridged fluorophores with hybridized local and charge-transfer characteristics for efficient OLEDs with low efficiency roll-off† 具有杂化局部特性和电荷转移特性的不对称深蓝色四氟苯桥接荧光团，可用于效率滚降较低的高效有机发光二极管†。

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-23 DOI: 10.1039/D4QM00636D

Shengnan Wang, Haoyuan Qi, Hao Huang, Jie Li, Yuchao Liu, Shanfeng Xue, Shian Ying, Changsheng Shi and Shouke Yan

{"title":"Asymmetric deep-blue tetrafluorobenzene-bridged fluorophores with hybridized local and charge-transfer characteristics for efficient OLEDs with low efficiency roll-off†","authors":"Shengnan Wang, Haoyuan Qi, Hao Huang, Jie Li, Yuchao Liu, Shanfeng Xue, Shian Ying, Changsheng Shi and Shouke Yan","doi":"10.1039/D4QM00636D","DOIUrl":"https://doi.org/10.1039/D4QM00636D","url":null,"abstract":"High dynamic range technology places greater demands on organic light-emitting diode (OLED) displays, particularly blue emitters, which face significant challenges in meeting the wide-color-gamut BT.2100 standard and achieving high efficiency at high brightness. Here, we propose a design strategy for constructing bipolar deep-blue materials by combining an asymmetric donor–acceptor–donor′ (D–A–D′) type structure with a novel tetrafluorobenzene acceptor. The resulting molecules feature typical hybridized local and charge-transfer state characteristics, with high oscillator strengths, achieving high fluorescence efficiencies exceeding 80% and fast radiative rates that surpass 6 × 108 s−1. Consequently, the doped device emits a deep-blue light with color coordinates of (0.159, 0.048), and demonstrates a maximum external quantum efficiency (EQE) of 6.35%, maintaining efficiencies of 5.95% and 5.61% at 500 and 1000 cd m−2, respectively. Remarkably, the non-doped OLED boasts a superior EQE of 7.44%, retaining an impressive 6.99% even at 1000 cd m−2 and maintaining a high 6.19% up to a brightness of 10 000 cd m−2, demonstrating minimal efficiency roll-off. These findings underscore the great potential of the tetrafluorobenzene-based D–A–D′ type molecular design strategy in developing efficient blue materials and their optoelectronic applications.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 1","pages":" 55-64"},"PeriodicalIF":6.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826025","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

Channelization of cathode/electrolyte interphase to enhance the rate-capability of LiCoO2† 阴极/电解质界面通道化以提高LiCoO2†的速率能力

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-22 DOI: 10.1039/D4QM00748D

Liewu Li, Zhencheng Huang, Qi Yuan, Hongbin Wang, Xuming Yang, Chufang Chen, Xiaoyu Gong, Qianqian Jiang, Jing Chen, Xiaoping Ouyang, Jionghui Wang, Liqing He, Xiangzhong Ren, Jiangtao Hu, Qianling Zhang and Jianhong Liu

{"title":"Channelization of cathode/electrolyte interphase to enhance the rate-capability of LiCoO2†","authors":"Liewu Li, Zhencheng Huang, Qi Yuan, Hongbin Wang, Xuming Yang, Chufang Chen, Xiaoyu Gong, Qianqian Jiang, Jing Chen, Xiaoping Ouyang, Jionghui Wang, Liqing He, Xiangzhong Ren, Jiangtao Hu, Qianling Zhang and Jianhong Liu","doi":"10.1039/D4QM00748D","DOIUrl":"https://doi.org/10.1039/D4QM00748D","url":null,"abstract":"The LiCoO2 cathode material holds great promise for achieving high energy density lithium-ion batteries (LIBs) in electronic products. However, it exhibits structural instability when voltages surpass 4.35 V (vs. Li+/Li), particularly under conditions of high current density. Here, we report an in situ surface modification technique for synthesizing a LiCoO2 composite coated with ZrP2O7 (LiCoO2@ZrP2O7) to mitigate these issues. The LiCoO2@ZrP2O7 electrode exhibits a significantly high initial discharge capacity and exceptional long-term cycling stability, with 97.7% capacity retention after 200 cycles at 0.5C with a cutoff voltage of 4.5 V. Additionally, the rate-capability of the modified LiCoO2 cathode is effectively enhanced by incorporating a ZrP2O7 coating layer, resulting in 76.8% capacity retention at 5C compared to the original capacity at 0.1C. Moreover, density functional theory (DFT) calculations reveal that the incorporation of ZrP2O7 facilitates Li+ migration into LiCoO2 by reducing the energy barrier. These findings propose a potential approach for preparing layered transition metal oxides with exceptionally stable structure and high interfacial Li+ diffusion kinetics, particularly for advancing high-energy density all solid-state batteries.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 24","pages":" 4088-4095"},"PeriodicalIF":6.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761633","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

Retraction: A supramolecular nanotube used as a water-degradable template for the production of protein nanotubes with high thermal/chemical stabilities 撤回：超分子纳米管用作水降解模板，用于生产具有高热/化学稳定性的蛋白质纳米管

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-22 DOI: 10.1039/D4QM90066A

Naohiro Kameta and Wuxiao Ding

引用次数: 0

Highly efficient top-emitting green phosphorescent OLEDs with a narrow band and slow efficiency roll-off for high-definition displays† 高效的顶部发光绿色磷光oled，窄带和低效率滚降，用于高清显示†

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-17 DOI: 10.1039/D4QM00779D

Jun Wang, Fanmin Meng, Weijian Liu, Zhaochao Zhang and Jiuyan Li

{"title":"Highly efficient top-emitting green phosphorescent OLEDs with a narrow band and slow efficiency roll-off for high-definition displays†","authors":"Jun Wang, Fanmin Meng, Weijian Liu, Zhaochao Zhang and Jiuyan Li","doi":"10.1039/D4QM00779D","DOIUrl":"https://doi.org/10.1039/D4QM00779D","url":null,"abstract":"High-definition displays commonly require narrow-band spectra, stability and high efficiency, especially under high brightness. Two ambipolar hosts were developed with xanthone and dibenzofuran as binary n-type units and carbazole as a p-type unit, which showed glass transition temperatures over 140 °C and triplet energies of 2.8 eV. They were used as hosts for tris(2-phenylpyridine)iridium (Ir(ppy)3) to fabricate top-emission green-phosphorescent organic light-emitting diodes (PhOLEDs). Owing to the strengthened microcavity effect and favorable optoelectronic features of the host materials, the green PhOLEDs exhibited low turn-on voltages of 1.97 and 1.85 V and a narrow full width at half maximum (FWHM) of 28 nm. Furthermore, the maximum current efficiency (CE) and power efficiency (PE) reached as high as 183.1 cd A−1 and 247.3 lm W−1, respectively. More importantly, even at an ultra-high brightness of 66 000 cd m−2, the efficiencies were maintained at 132.2 cd A−1 and 68.2 lm W−1 and surpassed many similar devices reported previously. In comparison with the prevailing multi-resonance thermally activated delayed-fluorescence (TADF) OLEDs, these top-emitting PhOLEDs were comparable in terms of extremely high efficiency and narrow-band color purity but superior in terms of their exceptional efficiency stability, high brightness, and facile synthesis, all of which make them suitable for practical application in high-definition displays.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 24","pages":" 4106-4113"},"PeriodicalIF":6.0,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761635","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

Intercluster charge ordering in monoclinic and triclinic Ba–Mo-based hollandite phases† 单斜和三斜钡钼基绿泥石相中的团间电荷排序†。

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-16 DOI: 10.1039/D4QM00622D

Eslam M. Elbakry and Jared M. Allred

{"title":"Intercluster charge ordering in monoclinic and triclinic Ba–Mo-based hollandite phases†","authors":"Eslam M. Elbakry and Jared M. Allred","doi":"10.1039/D4QM00622D","DOIUrl":"https://doi.org/10.1039/D4QM00622D","url":null,"abstract":"Reproducible solid-state synthesis methods are presented for the preparation of tetragonal Ba1.1Mo8O16, monoclinic Na0.325(5)Ba1.006(18)Mo8O16, and triclinic Ba1.12(3)Mo8O16 hollandite phases, with complete, high-resolution crystal structures of the monoclinic and triclinic phases reported for the first time. The similar synthetic conditions allow direct comparisons between phases; differences between structures are shown to be correlated to subtle changes in the metal–metal bonding of the Mo4 cluster motif that is unique to the Mo-based hollandites. The trends in the local Mo valence, stoichiometry, and key Mo–Mo bond lengths of these and other reported Mo-based hollandite phases together support an interchain charge ordering model for this family of compounds, which has been previously suggested for the case of K2Mo8O16. An alternate model, where Mott physics dominate the electronic structure near the Fermi level, is not supported by temperature-dependent magnetic susceptibility measurements, which are reported down to 2 K. The incorporation and homogeneity of Na in the monoclinic phase is verified using atom probe tomography.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 1","pages":" 85-99"},"PeriodicalIF":6.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826029","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

Laser irradiation-induced two-photon photolysis of sulfates for photoluminescent sulfur quantum dots† 激光辐照诱导的硫酸盐双光子光解用于光致发光硫量子点†

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-15 DOI: 10.1039/D4QM00733F

Shuxian Wei, Hao Huang, Ningning He, Taiping Hu, Jijun Huang, Yunyu Cai, Yixing Ye, Pengfei Li, Xueling Lei and Changhao Liang

引用次数: 0

Tailoring the adsorption properties of imidazole-based halogen bonded organic frameworks for anionic dye removal† 咪唑基卤素键合有机骨架对阴离子染料去除性能的调整

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-15 DOI: 10.1039/D4QM00735B

Shumeng Wang, Hongqiang Dong, Guanfei Gong, Siyi Lin, Jiahao Zhao, Zhennan Tian, Ya Lu, Xuguan Bai, Meimei Zhang, Lu Wang, Kang-Da Zhang and Shigui Chen

{"title":"Tailoring the adsorption properties of imidazole-based halogen bonded organic frameworks for anionic dye removal†","authors":"Shumeng Wang, Hongqiang Dong, Guanfei Gong, Siyi Lin, Jiahao Zhao, Zhennan Tian, Ya Lu, Xuguan Bai, Meimei Zhang, Lu Wang, Kang-Da Zhang and Shigui Chen","doi":"10.1039/D4QM00735B","DOIUrl":"https://doi.org/10.1039/D4QM00735B","url":null,"abstract":"The diversification of organic ligands is critical for the development of organic frameworks. This study introduces a novel class of imidazole ligand-based [N⋯I⋯N]+ halogen bonded organic frameworks (XOFs). By employing various imidazole linkers, including Mlm, DIB, and TIB, we successfully synthesized 1D and 2D XOFs. Characterization techniques such as 1H NMR, FT-IR, XPS, PXRD, SEM, HRTEM, and SAED confirmed the successful formation of these frameworks. XOF-TIB, a representative 2D XOF, demonstrated exceptional adsorption capacity and selectivity for anionic dyes. The adsorption mechanism was determined to be based on electrostatic interactions. Additionally, XOF-TIB exhibited good reusability and stability. These findings highlight the potential of imidazole ligands for the construction of XOFs and the promising applications of these materials in environmental remediation, particularly for anionic dye removal from wastewater.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 24","pages":" 4096-4105"},"PeriodicalIF":6.0,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761634","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

Yolk–shell SiO@Co9S8 particles encapsulated in carbon fibres by electrostatic spinning for lithium-ion battery anodes† 用静电纺丝将蛋黄壳SiO@Co9S8颗粒封装在碳纤维中，用于锂离子电池阳极†

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-14 DOI: 10.1039/D4QM00790E

Yan Xu, Ying Huang, Xianping Du, Wanqing Fan and Jiayong Yao

{"title":"Yolk–shell SiO@Co9S8 particles encapsulated in carbon fibres by electrostatic spinning for lithium-ion battery anodes†","authors":"Yan Xu, Ying Huang, Xianping Du, Wanqing Fan and Jiayong Yao","doi":"10.1039/D4QM00790E","DOIUrl":"https://doi.org/10.1039/D4QM00790E","url":null,"abstract":"In view of the growing number of new energy electric vehicles and portable electronic products, the demand for high energy density lithium-ion batteries is crucial. SiO materials have attracted much attention due to their high theoretical specific capacity, but problems of large volume expansion and low conductivity have hindered their practical application in lithium-ion batteries (LIBs). In view of these problems, a SiO@Co9S8 carbon fiber (CF) yolk–shell structured composite electrode was designed in this paper. Among them, the hollow Co9S8 particles have excellent lithium storage capacity and abundant active sites, and the encapsulation effect of SiO nanoparticles (NPs) is better, which can alleviate the problem of excessive volume expansion to a large extent, the SiO@Co9S8 particles are perfectly embedded in CF, which further alleviates the volume expansion of the SiO and Co9S8 materials during cycling, and the one-dimensional CF provides an effective electron transfer channel for electron transfer, which can promote the electrochemical performance of the composite electrode. Thanks to the Co9S8 and CF materials as two protective layers, the stability of the electrode structure is strengthened, and the obtained electrode material has a stable cycle life. As an anode for lithium-ion batteries, SiO@Co9S8 CF exhibits high reversible capacity and good rate performance.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 24","pages":" 4059-4068"},"PeriodicalIF":6.0,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761621","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

Colloidal fluorine-doped ZnO quantum dots: the synergistic action of atomic doping and growth conditions directs fluorescence and photoactivity† 氟掺杂的胶体氧化锌量子点：原子掺杂和生长条件的协同作用引导荧光和光活性†。

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-11 DOI: 10.1039/D4QM00655K

Noemi Gallucci, Alessandro Cangiano, Simone Russo, Giulio Pota, Rocco Di Girolamo, Eugénie Martinez, Nicolas Vaxelaire, Luigi Paduano and Giuseppe Vitiello

{"title":"Colloidal fluorine-doped ZnO quantum dots: the synergistic action of atomic doping and growth conditions directs fluorescence and photoactivity†","authors":"Noemi Gallucci, Alessandro Cangiano, Simone Russo, Giulio Pota, Rocco Di Girolamo, Eugénie Martinez, Nicolas Vaxelaire, Luigi Paduano and Giuseppe Vitiello","doi":"10.1039/D4QM00655K","DOIUrl":"https://doi.org/10.1039/D4QM00655K","url":null,"abstract":"Quantum dots are nano-sized semiconductor particles showing peculiar optical properties due to the quantum confinement effect. They can efficiently absorb photons and generate excitons, leading to a stable fluorescence emission decisive to designing light-sensitive devices, or they can exert a pronounced photoactivity that favors their use in photocatalysis and photodynamic fields. Among the inorganic quantum dots, ZnO ones show unique optical and electronic properties together with low toxicity, good biocompatibility, and excellent photochemical stability. These features can be deeply influenced by tuning their size, surface, and/or bulk defects as well as by doping. Doping with anionic atoms represents an intriguing alternative to cationic metals to improve ZnO activity. Here, the emission behaviour and photoactivity of fluorine-doped ZnO quantum dots were simultaneously studied as a function of fluorine content and synthesis conditions (e.g., wet-precipitation or solvothermal) adopted for the fabrication. The obtained results demonstrated that a low fluorine content (<5 nominal at%) was pivotal to induce a significant enhancement of the relative emission quantum yield of quantum dots from the wet-precipitation route, while a high photocatalytic activity was guaranteed for those obtained by a solvothermal strategy due to the bulk distribution of atomic defects.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 23","pages":" 3973-3984"},"PeriodicalIF":6.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/qm/d4qm00655k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of organic compound/g-C3N4 composites and their applications in photocatalysis 有机化合物/g-C3N4 复合材料的制备及其在光催化中的应用

IF 6 2区材料科学

Materials Chemistry Frontiers Pub Date : 2024-10-10 DOI: 10.1039/D4QM00567H

Jun Wu, Xingchen Ding and Xiashi Zhu

{"title":"Preparation of organic compound/g-C3N4 composites and their applications in photocatalysis","authors":"Jun Wu, Xingchen Ding and Xiashi Zhu","doi":"10.1039/D4QM00567H","DOIUrl":"https://doi.org/10.1039/D4QM00567H","url":null,"abstract":"Photocatalysis based on the organic polymer semiconductor, g-C3N4, is a green technology, but effective energy conversion is still limited by the small light absorption range and high photogenerated carrier complexation rate of g-C3N4 photocatalysts. The introduction of organic molecules into the g-C3N4 backbone has become a design hotspot for optimising g-C3N4 performance. In this review, recent developments in the morphology of g-C3N4-based composites as photocatalysts, strategies for the preparation of organic compound/g-C3N4 composites and the applications of organic compound/g-C3N4 composites in photocatalysis are introduced. The perspectives on future directions of organic compound/g-C3N4 composites are discussed.","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 23","pages":" 3859-3876"},"PeriodicalIF":6.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672213","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