Materials Chemistry Frontiers最新文献

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Recent developments in insertion anode materials for Li-ion batteries 锂离子电池插入负极材料的研究进展
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-26 DOI: 10.1039/D5QM00329F
Junjin Zhang, Qitao Shi, Chen Lu, Xiangqi Liu, Jiaqi Wang, Cheng Zhang, Zhipeng Wang, Mansoor Majid, Luwen Li, Alicja Bachmatiuk, Yanbin Shen, Ruizhi Yang and Mark H. Rümmeli
{"title":"Recent developments in insertion anode materials for Li-ion batteries","authors":"Junjin Zhang, Qitao Shi, Chen Lu, Xiangqi Liu, Jiaqi Wang, Cheng Zhang, Zhipeng Wang, Mansoor Majid, Luwen Li, Alicja Bachmatiuk, Yanbin Shen, Ruizhi Yang and Mark H. Rümmeli","doi":"10.1039/D5QM00329F","DOIUrl":"https://doi.org/10.1039/D5QM00329F","url":null,"abstract":"<p >Insertion anode materials have gained immense attention as commercial anode materials for lithium-ion batteries owing to their reversible Li-ion intercalation/deintercalation mechanism and highly stable crystal structure. Herein, the progress in the development of graphite, titanium-based anode materials, MXene (Ti<small><sub>3</sub></small>C<small><sub>2</sub></small>T<small><sub><em>x</em></sub></small>), and other insertion anode materials is reviewed. The effect of modification strategies (such as nanostructure design, surface engineering, bulk phase engineering, and composite structure design) on the electrochemical properties of insertion anode materials is discussed. Studies have shown that the specific capacity and rate and cycling performances of these anode materials can be significantly improved by optimising their crystal structure, interface engineering, and conductive network construction. However, traditional insertion materials suffer from low specific capacity and high polarization at high rates. Further research is imperative to balance the energy density and dynamic performance of these materials to realise their widespread application in fast-charge and high energy density lithium-ion batteries.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 14","pages":" 2161-2177"},"PeriodicalIF":6.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566809","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
Novel twisted-structure polymer electrode material with intrinsic pores for high-performance electrochromic supercapacitor† 高性能电致变色超级电容器用具有本征孔的新型扭曲结构聚合物电极材料
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-23 DOI: 10.1039/D4QM00992D
Yuchen Chang, Qidi Huang, Lei Yang, Mi Ouyang, Yujie Dong, Weijun Li and Cheng Zhang
{"title":"Novel twisted-structure polymer electrode material with intrinsic pores for high-performance electrochromic supercapacitor†","authors":"Yuchen Chang, Qidi Huang, Lei Yang, Mi Ouyang, Yujie Dong, Weijun Li and Cheng Zhang","doi":"10.1039/D4QM00992D","DOIUrl":"https://doi.org/10.1039/D4QM00992D","url":null,"abstract":"<p >This study presents the innovative design and synthesis of a <strong>3DMAC-EDOT</strong> monomer, featuring inherent porosity and a significant torsional angle, for advanced energy storage and electrochromic applications. The monomer incorporates a calix[3]acridan ring as the central donor (D) and EDOT as the acceptor (A). It is subsequently fabricated into a polymer film through electrochemical polymerization. This polymer film demonstrates outstanding electrochromic (EC) and energy storage capabilities, characterized by a reversible color shift from yellow-green to gray-black, a high coloring efficiency of 251.2 cm<small><sup>2</sup></small> C<small><sup>−1</sup></small>, and stable optical performance over 6000 s of cycling. It also features rapid color switching (1 s/2.4 s at 1100 nm) and a significant specific capacitance of 4.76 mF cm<small><sup>−2</sup></small>, with excellent cycling stability, retaining 81.5% of its initial capacitance after 1000 cycles. Furthermore, the polymer was utilized to construct an EC supercapacitor device, effectively integrating energy storage and EC technologies into a single unit. This integration enables visual energy detection through color visualization of stored energy levels, offering a novel approach to energy management. These findings demonstrate the feasibility of achieving optimal performance by rationally designing the molecular structure of D–A–D conjugated polymers. The study highlights the potential of <strong>3DMAC-EDOT</strong>-based materials in advancing energy storage and EC technologies, paving the way for innovative applications in various fields.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 14","pages":" 2178-2189"},"PeriodicalIF":6.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566812","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
Porous Cu nanosheets for efficient ammonia production via nitrate electroreduction† 硝酸电还原法制备高效氨的多孔铜纳米片
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-22 DOI: 10.1039/D5QM00322A
Eman-Shaiba Thani, Yi-Ting Yang, Qiu-Yu Du, Rou Yuan, Yong-Qi Zhang, Yu-Tong Yan, Xuan Ai, Yu Chen and Shu-Ni Li
{"title":"Porous Cu nanosheets for efficient ammonia production via nitrate electroreduction†","authors":"Eman-Shaiba Thani, Yi-Ting Yang, Qiu-Yu Du, Rou Yuan, Yong-Qi Zhang, Yu-Tong Yan, Xuan Ai, Yu Chen and Shu-Ni Li","doi":"10.1039/D5QM00322A","DOIUrl":"https://doi.org/10.1039/D5QM00322A","url":null,"abstract":"<p >The electrochemical nitrate reduction reaction (NO<small><sub>3</sub></small>RR) offers a promising alternative synthetic route for sustainable ammonia (NH<small><sub>3</sub></small>) production, effectively removing nitrate (NO<small><sub>3</sub></small><small><sup>−</sup></small>) from wastewater under mild operating conditions. Copper (Cu) nanomaterials are considered to be effective catalysts for the NO<small><sub>3</sub></small>RR. This study reports the simple synthesis of porous Cu nanosheets <em>via</em> a two-step reaction, which are obtained from the electrochemical reduction of CuO nanosheets. The porous Cu nanosheets exhibit a high selectivity and activity for the NO<small><sub>3</sub></small>RR, achieving an NH<small><sub>3</sub></small> yield of 42.5 mg h<small><sup>−1</sup></small> mg<small><sub>cat</sub></small><small><sup>−1</sup></small> and a faradaic efficiency of 97.0% for the conversion of NO<small><sub>3</sub></small><small><sup>−</sup></small> to NH<small><sub>3</sub></small> at the potential of −0.7 V (<em>vs.</em> RHE). The prominent electrocatalytic activity can be ascribed to the porous architecture, high surface area, and low mass transfer resistance.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 14","pages":" 2243-2249"},"PeriodicalIF":6.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566818","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
Harnessing a remote synergistic effect for regulating photoinduced electron transfer: a novel strategy for absorption/fluorescence dual-mode hydrochromism† 利用远程协同效应调节光诱导电子转移:吸收/荧光双模水致变色的新策略
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-20 DOI: 10.1039/D5QM00180C
Junli Gao, Qiang Gao, Jinyan Zhang, Tianyou Qin, Fanyu Kong, Yifei Liu, Lu-Yi Zou, Sean Xiao-An Zhang and Lan Sheng
{"title":"Harnessing a remote synergistic effect for regulating photoinduced electron transfer: a novel strategy for absorption/fluorescence dual-mode hydrochromism†","authors":"Junli Gao, Qiang Gao, Jinyan Zhang, Tianyou Qin, Fanyu Kong, Yifei Liu, Lu-Yi Zou, Sean Xiao-An Zhang and Lan Sheng","doi":"10.1039/D5QM00180C","DOIUrl":"https://doi.org/10.1039/D5QM00180C","url":null,"abstract":"<p >Herein, a remote synergistic effect has been proposed for effectively modulating the intramolecular photoinduced electron transfer (PET) process by unconventionally introducing two methyl groups into an amino group with the synergistic assistance of a neighboring auxiliary group. This strategy overcomes the problem of fluorescence quenching caused by PET without changing the electron-donating properties of the group which is important for retaining the original properties of molecules/probes. Benefiting from this strategy, an ideal absorption/fluorescence dual-mode hydrochromic molecular switch (<em>i.e.</em>, dimethylamino-rhodamine (NMe<small><sub>2</sub></small>-RhB)) is obtained. The involved hydrochromism and PET modulation mechanism were confirmed through detailed experiments and theoretical calculations. The NMe<small><sub>2</sub></small>-RhB exhibited excellent water-induced color and fluorescence in both solution and a solid matrix, and its potential application in advanced anti-counterfeiting was demonstrated. This work not only provides a new dual-mode hydrochromic material, but more importantly, also offers new insights for regulating PET processes.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 13","pages":" 2078-2086"},"PeriodicalIF":6.0,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367144","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
Synthesis and design of terbium-activated CaWO4 nanocrystals for fluorescence sensing of alkaline phosphatase and bioimaging applications† 用于碱性磷酸酶荧光传感和生物成像应用的铽活化CaWO4纳米晶体的合成与设计
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-19 DOI: 10.1039/D5QM00122F
Terefe Tafese Bezuneh, Xin Li, Tongtong Kou, Fuchun Nan, Zilong Wu, Lanbo Shen, Xinyuan Xia, Bin Li, Liang Wang and William W. Yu
{"title":"Synthesis and design of terbium-activated CaWO4 nanocrystals for fluorescence sensing of alkaline phosphatase and bioimaging applications†","authors":"Terefe Tafese Bezuneh, Xin Li, Tongtong Kou, Fuchun Nan, Zilong Wu, Lanbo Shen, Xinyuan Xia, Bin Li, Liang Wang and William W. Yu","doi":"10.1039/D5QM00122F","DOIUrl":"https://doi.org/10.1039/D5QM00122F","url":null,"abstract":"<p >Calcium tungstate nanocrystals CaWO<small><sub>4</sub></small> NCs represent an important family of inorganic oxides and are well-known for their rare-earth (RE) sensitizing properties. Although RE-doped CaWO<small><sub>4</sub></small> NCs have been extensively used in the optical field, their applications as a fluorescent probe is yet to be explored. In this report, inspired by their excellent luminescence properties, we demonstrate the potential of terbium-activated CaWO<small><sub>4</sub></small> NCs as a fluorescent probe for sensing and biological imaging applications. In our study, we successfully synthesized nano-sized water dispersible PEG coated Tb–CaWO<small><sub>4</sub></small> NCs <em>via</em> a facile one-step hydrothermal route. Next, the potential of PEG–Tb–CaWO<small><sub>4</sub></small> NCs as a fluorescent sensing probe was evaluated by employing a “signal-off–on” sensing strategy for the detection of a key disease biomarker (alkaline phosphatase, ALP). The proposed detection system realized sensitive detection of ALP with a low limit of detection of 0.5 U L<small><sup>−1</sup></small>. Moreover, the cell imaging potential of PEG–Tb–CaWO<small><sub>4</sub></small> NCs was investigated using HeLa cells. PEG–Tb–CaWO<small><sub>4</sub></small> NCs were internalized by HeLa cells through endocytosis and showed characteristic bright green emission, demonstrating the cell imaging potential of the as-synthesized NCs. Also, the viability study confirmed the very low cell cytotoxicity of PEG–Tb–CaWO<small><sub>4</sub></small> NCs to HeLa cells. Overall, we highlighted the potential of PEG–Tb–CaWO<small><sub>4</sub></small> NCs as a promising fluorescence probe for sensing and biological imaging applications.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 13","pages":" 2066-2077"},"PeriodicalIF":6.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367143","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
Cs4PbX6-UCLNPs/PS film for multimodal anti-counterfeiting and information encryption storage upon triple strategies of water treatment, light excitation and heating/cooling† Cs4PbX6-UCLNPs/PS膜在水处理、光激发和加热/冷却三重策略下的多模态防伪和信息加密存储
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-19 DOI: 10.1039/D5QM00186B
Xintong Huo, Yunrui Xie, Yaolin Hu, Yuqi Sheng, Zheng Wang, Haina Qi, Hong Shao, Qianli Ma, Wensheng Yu and Xiangting Dong
{"title":"Cs4PbX6-UCLNPs/PS film for multimodal anti-counterfeiting and information encryption storage upon triple strategies of water treatment, light excitation and heating/cooling†","authors":"Xintong Huo, Yunrui Xie, Yaolin Hu, Yuqi Sheng, Zheng Wang, Haina Qi, Hong Shao, Qianli Ma, Wensheng Yu and Xiangting Dong","doi":"10.1039/D5QM00186B","DOIUrl":"https://doi.org/10.1039/D5QM00186B","url":null,"abstract":"<p >Development of advanced materials and techniques for anti-counterfeiting and information encryption storage still faces tremendous challenges of complex preparation, few anti-counterfeiting strategies and low anti-counterfeiting levels. To address these challenges, based on phase transition from non-luminescent Cs<small><sub>4</sub></small>PbX<small><sub>6</sub></small> (X = Cl, Br and I) quantum dots (QDs) to down-conversion luminescent (DCL) CsPbX<small><sub>3</sub></small> QDs after water treatment and NaYF<small><sub>4</sub></small>:Yb<small><sup>3+</sup></small>,Er<small><sup>3+</sup></small> up-conversion luminescent nanoparticles (UCLNPs), a brand-new Cs<small><sub>4</sub></small>PbX<small><sub>6</sub></small>-UCLNPs/polystyrene (PS) film with multimodal anti-counterfeiting and information encryption storage is devised and constructed through favorable electrospinning. Three different strategies are developed to achieve multimode anti-counterfeiting by leveraging UCL and DCL: 980-nm laser acts as the excitation source for Cs<small><sub>4</sub></small>PbX<small><sub>6</sub></small>-UCLNPs/PS films to produce green UCL to realize UCL static and dynamic anti-counterfeiting; multicolor DCL static and dynamic anti-counterfeiting are, respectively, achieved in Cs<small><sub>4</sub></small>PbX<small><sub>6</sub></small>-UCLNPs/PS films with different halogen ion compositions <em>via</em> water-based ink silk-screen printing and wet brush writing under 365-nm ultraviolet (UV) light irradiation; DCL patterns on CsPbX<small><sub>3</sub></small>-UCLNPs/PS films can be eliminated or restored by heating/cooling cycles to achieve thermal static anti-counterfeiting. Furthermore, multicolor DCL of CsPbX<small><sub>3</sub></small>-UCLNPs/PS films is encoded as ASCII binary code to store information. Meanwhile, water treatment, UV light and heating/cooling process are employed for information encryption and decryption. This research contributes to the advancement of sophisticated anti-counterfeiting and information encryption storage technologies.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 13","pages":" 2041-2053"},"PeriodicalIF":6.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367141","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
Achieving dendrite-free anodes for aqueous zinc ion batteries using zinc anode coated with a rGO/biomass carbon composite for interfacial modification† 采用涂覆氧化石墨烯/生物质碳复合材料进行界面改性†的锌阳极制备无枝晶水性锌离子电池阳极
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-19 DOI: 10.1039/D5QM00010F
Lin Zhu, Hao Zhou, Dongbo Zhu, Wenjing Zheng, Jie Guan and Kan Zhang
{"title":"Achieving dendrite-free anodes for aqueous zinc ion batteries using zinc anode coated with a rGO/biomass carbon composite for interfacial modification†","authors":"Lin Zhu, Hao Zhou, Dongbo Zhu, Wenjing Zheng, Jie Guan and Kan Zhang","doi":"10.1039/D5QM00010F","DOIUrl":"https://doi.org/10.1039/D5QM00010F","url":null,"abstract":"<p >Aqueous zinc ion batteries (AZIBs) have emerged as a promising member of the emerging energy storage battery family, attributed to their merits such as low cost, high safety, and environmental friendliness. However, their practical applications have been hampered by issues like side reactions and the growth of zinc dendrites. In this paper, we developed a method to prepare reduced graphene oxide (rGO)-attached biomass carbon composites (rGO/BC) for coating the zinc anode surface by using a simple hydrothermal method. Firstly, rGO was incorporated to offer more Zn-friendly sites, effectively suppressing the growth of zinc dendrites. Secondly, the flexible structure of rGO not only enhanced the reaction kinetics but also improved the structural stability of the rGO/BC composites. In addition, the synergistic effect of rGO and BC resulted in excellent electrical conductivity and electrolyte wettability of the zinc anode, thereby reducing the interfacial resistance. Thanks to these advantages, the AZIBs assembled with the rGO/BC@Zn anode exhibited excellent electrochemical performance. In composite experiments with different ratios, the symmetric cell assembled with rGO/BC-5, which demonstrated the best performance, had a low overpotential and achieved a cycle life of 2400 h at 1 mA cm<small><sup>−2</sup></small> and 0.15 mA h cm<small><sup>−2</sup></small>. When this anode was paired with VO<small><sub>2</sub></small>, the rGO/BC-5@Zn//VO<small><sub>2</sub></small> full cell showed outstanding cycling performance, maintaining a capacity retention of 83% after 2400 cycles at 5 A g<small><sup>−1</sup></small>. This work presents a novel interfacial approach for modifying zinc anodes with biomass-carbon composites, providing valuable insights for the development of high-performance AZIBs.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 14","pages":" 2232-2242"},"PeriodicalIF":6.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566817","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
The role of single copper atoms in enhancing the photocatalytic activity of carbon nitride for selective oxidation† 单铜原子在提高氮化碳选择性氧化光催化活性中的作用
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-15 DOI: 10.1039/D5QM00296F
Hanggara Sudrajat, Jakkapon Phanthuwongpakdee and Juan Carlos Colmenares
{"title":"The role of single copper atoms in enhancing the photocatalytic activity of carbon nitride for selective oxidation†","authors":"Hanggara Sudrajat, Jakkapon Phanthuwongpakdee and Juan Carlos Colmenares","doi":"10.1039/D5QM00296F","DOIUrl":"https://doi.org/10.1039/D5QM00296F","url":null,"abstract":"<p >Photocatalytic reactions are driven by excited charge carriers; therefore, their performance inherently depends on photocarrier behavior. In this study, we examine the relationship between photocarrier behavior and the photocatalytic activity of g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> loaded with single Cu atoms for the selective oxidation in water. As probed with transient microwave conductivity, the introduction of single Cu atoms enhances photoconductivity by increasing the mobility and extending the lifetimes of photoexcited electrons. This enhancement results in a greater population of mobile electrons. While pristine g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> exhibits no measurable photoconductivity, it is still capable of driving photocatalytic reactions. This suggests that in g-C<small><sub>3</sub></small>N<small><sub>4</sub></small>, photoexcited electrons are predominantly trapped rather than recombined, yet they are sufficiently reactive. The product of photoconductivity and electron lifetime shows a linear correlation with photocatalytic activity, demonstrating its potential as a promising descriptor for catalyst design. In terms of performance, our photocatalysts achieve a yield-to-power ratio of up to 1.1 mmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small> W<small><sup>−1</sup></small> for benzaldehyde production from benzyl alcohol under 455 nm irradiation with 100% selectivity and aromatic balance and an apparent quantum yield of 0.82%. The reaction proceeds under ambient conditions without the need for additives or external oxidants. Equally important, H<small><sub>2</sub></small>O<small><sub>2</sub></small> is also produced at a rate as high as 0.26 mmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small>.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 12","pages":" 1917-1932"},"PeriodicalIF":6.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244045","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
Performance enhancement by additional donors in D–A–D′ type thermally activated delayed fluorescence materials† D-A-D '型热激活延迟荧光材料的附加供体对性能的增强
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-14 DOI: 10.1039/D5QM00104H
Jiuyan Li, Xin Li, Jiahui Wang, Jing Jin and Jun Wang
{"title":"Performance enhancement by additional donors in D–A–D′ type thermally activated delayed fluorescence materials†","authors":"Jiuyan Li, Xin Li, Jiahui Wang, Jing Jin and Jun Wang","doi":"10.1039/D5QM00104H","DOIUrl":"https://doi.org/10.1039/D5QM00104H","url":null,"abstract":"<p >Two donor–acceptor–donor’ (D–A–D′) type thermally activated delayed fluorescence (TADF) molecules, tCz-BP-PXZ and tCz-PhBP-PXZ, comprising a benzoyl acceptor and two different donors, <em>i.e.</em> phenoxazine (PXZ) and 3,6-di-<em>tert</em>-butyl-9-methyl-9<em>H</em>-carbazole (tCz), were designed and prepared. The second donor tCz was linked either directly (tCz-BP-PXZ) or through a phenylene bridge (tCz-PhBP-PXZ) to the benzoyl acceptor. The quantum calculations and spectral measurements revealed that the PXZ donor preferentially underwent charge transfer interaction with the benzoyl acceptor to achieve a small Δ<em>E</em><small><sub>ST</sub></small> for the TADF feature, while the tCz donor offered twisted molecular configurations to reduce intermolecular interactions and tuned the higher triplet state's nature and alignment and enhanced the RISC process and the TADF ratio. Thus, the incorporation of the tCz donor in tCz-BP-PXZ and tCz-PhBP-PXZ increased the photoluminescence quantum yields and reverse intersystem crossing rates relative to the tCz-free reference emitter BP-PXZ. Yellow organic light-emitting diodes (OLEDs) of tCz-BP-PXZ and tCz-PhBP-PXZ exhibited high EQEs of 17.2% and 23.5% that are much higher than that of BP-PXZ (14.0%) and slow efficiency roll-offs (with EQEs of 15.9% and 16.8% at 1000 cd m<small><sup>−2</sup></small>) due to a suppressed quenching effect. They also exhibited acceptable performance in non-doped OLEDs. It was observed that the phenylene linkage between the tCz group and the acceptor in tCz-PhBP-PXZ is beneficial and responsible for the superior performance of tCz-BP-PXZ.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 13","pages":" 2099-2109"},"PeriodicalIF":6.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367146","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
Fabrication of 3D structured human cell networks using capillary cell suspensions from aqueous two-phase systems† 利用毛细管细胞悬浮液从水两相系统制造的三维结构人体细胞网络†
IF 6 2区 材料科学
Materials Chemistry Frontiers Pub Date : 2025-05-13 DOI: 10.1039/D5QM00196J
Amro K. F. Dyab and Vesselin N. Paunov
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