Journal of Materials Chemistry C最新文献

{"title":"Sintering and enhanced ferroelectric properties of textured Bi5Ti3FeO15 ceramics with high Curie temperature†","authors":"Jingxin Tian, Fangzhe Li, Xiaohui Tang, Huijiadai Luo, Lu Cao, Shaojie Sun, Changrong Liu, Yong Huang, Hua Ke and Yu Zhou","doi":"10.1039/D4TC05030D","DOIUrl":"https://doi.org/10.1039/D4TC05030D","url":null,"abstract":"<p >We prepared highly textured Bi<small>₅</small>Ti<small>₃</small>FeO<small>₁₅</small> (BTFO) ceramics with excellent ferroelectric properties using the template grain growth method (TGG). The sintering densification behavior and grain orientation evolution of highly anisotropic textured BTFO ceramics are analyzed by various characterization methods. The obtained textured BTFO ceramics exhibit increased remanent polarization within a slight temperature range from 25 °C to 60 °C due to the stress release in the <em>a</em>–<em>b</em> planes. The piezoelectric coefficient value <em>d</em><small>₃₃</small> of textured BTFO ceramics is 23.0 pC N<small>⁻¹</small>, which is about 3.7 times higher than that of the random ceramics. Compared to Bi<small>₄</small>Ti<small>₃</small>O<small>₁₂</small> (677 °C), the increasing Curie temperature (767 °C) of BTFO is attributed to the larger distortion of TiO<small>₆</small> octahedra, which is also confirmed by energy barriers in DFT calculations. The antiferromagnetic characteristics also provide feasibility for magnetoelectric coupling in BTFO materials.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7358-7367"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769635","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}

{"title":"Electronic transport properties of sandwich-type phthalocyanine Th(Pc)2†","authors":"Weiyu Xie, Xiaobo Yuan, Bo Wang, Ding Wang and Hua Zou","doi":"10.1039/D4TC03268C","DOIUrl":"https://doi.org/10.1039/D4TC03268C","url":null,"abstract":"<p >Sandwich-type phthalocyanines, a significant branch of phthalocyanine complexes, exhibit unique electrical and magnetic properties, making them highly promising for applications in novel molecular devices such as single-molecule magnets and field-effect transistors. Actinide elements, with their strong electron correlations and relativistic effects, contribute to forming actinide sandwich-type phthalocyanines with distinctive electronic structural characteristics. However, research on the transport mechanism of these complexes is still in its early stages. In this study, the electronic structure and electron transport properties of Th(Pc)<small>₂</small> are investigated using the non-equilibrium Green's function combined with density functional theory (NEGF-DFT). We discovered that simply altering the contact position of the electrodes with Th(Pc)<small>₂</small> significantly changes its equilibrium conductance, indicating its potential application as a molecular switch. Additionally, we observed that Th(Pc)<small>₂</small> exhibits negative differential resistance in specific bias voltage ranges. These findings are crucial for the rapid advancement of the molecular electronics field.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7226-7233"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769647","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}

{"title":"A Bi(iii)-based halide with near-unity photoluminescence quantum yield as a blue-light-excited red phosphor for WLEDs†","authors":"Dan-Dan Huang, Abdusalam Ablez, Ting-Hui Zhuang, Hao-Wei Lin, Zhong-Hua Deng, Ke-Zhao Du, Ze-Ping Wang and Xiao-Ying Huang","doi":"10.1039/D5TC00062A","DOIUrl":"https://doi.org/10.1039/D5TC00062A","url":null,"abstract":"<p >In recent years, inorganic–organic hybrid metal halides (IOMHs) have attracted wide attention in the field of white light-emitting diodes (WLEDs) due to their advantages of high-efficiency broadband emission, high photoluminescence quantum yield (PLQY), simple preparation process, <em>etc.</em> In this work, a blue-light-excited red phosphor with near-unity PLQY, namely [BzPPh<small>₃</small>]<small>₂</small>[Bi<small>₂</small>Br<small>₈</small>(bp4do)(DMSO)<small>₂</small>] (denoted as <strong>Bz-BiBrON</strong>; BzPPh<small>₃</small><small>⁺</small> = benzyltriphenylphosphonium, bp4do = 4,4′-bipyridine 1,1′-dioxide, DMSO = dimethyl sulfoxide) was synthesized mechanically. The analysis of the photophysical properties shows that under the excitation of blue light (430 nm), <strong>Bz-BiBrON</strong> has a broadband emission of 550–800 nm, peaking at 607 nm with a phosphorescence lifetime of 58.43 μs. The PLQY of <strong>Bz-BiBrON</strong> is up to 90.52%, which is the highest among Bi(<small>III</small>)-based halides. Comparative analysis demonstrates that the modulation of cations in Bi(<small>III</small>)-based halides can help increase their PLQY. With the help of density functional theory calculations, the light absorption-emission mechanism of <strong>Bz-BiBrON</strong> was elucidated and its broadband red emission was attributed to the phosphorescence of the triplet energy level of the organic ligand bp4do. <strong>Bz-BiBrON</strong> was used as a red phosphor in a WLED based on blue LED chips, exhibiting a high color rendering index (CRI) of 90.3 and a lumen efficiency of 68.94 lm W<small>⁻¹</small>, which proves the great potential of Bi-IOMHs as the phosphor for WLEDs.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7276-7281"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769604","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}

{"title":"Nonlinear transport behaviors in anti-aromatic cyclo[n]carbon-based (n = 4k) molecular devices†","authors":"Junnan Guo, Wenhui Fang, Jian Huang, Lishu Zhang, Weikang Wu and Hui Li","doi":"10.1039/D4TC04033C","DOIUrl":"https://doi.org/10.1039/D4TC04033C","url":null,"abstract":"<p >Recently, a doubly anti-aromatic cyclo[16]carbon (C<small>₁₆</small>) has been successfully synthesized. Similar to doubly aromatic C<small>_<em>n</em></small> (<em>n</em> = 4<em>k</em> + 2), anti-aromatic C<small>_<em>n</em></small> (<em>n</em> = 4<em>k</em>), including C<small>₁₆</small>, feature vertically discrete π-electron conjugate systems, endowing them with unique electronic properties. However, the exploration of the transport properties of anti-aromatic C<small>_<em>n</em></small>-based molecular devices is still in a rudimentary stage. In this study, we report on the electron transport properties of anti-aromatic C<small>_<em>n</em></small>-based devices with three different types of electrodes, using density functional theory (DFT) combined with the nonequilibrium Green's function (NEGF) method. Our findings reveal that all devices exhibit nonlinear transport behavior regardless of the electrode used, including current-limiting functions, multiple-negative differential resistance (multi-NDR) effect, and current oscillation behaviors. Furthermore, as the number of carbon atoms increases, each type of device shows a discernible pattern in its transport properties. The results reveal the regularity of transport in C<small>_<em>n</em></small>-based molecular devices and offer theoretical guidance for the development of next generation carbon based molecular devices.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 13","pages":" 6527-6538"},"PeriodicalIF":5.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716571","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}

{"title":"Sustained acid release from stimuli responsive organic crystals facilitates shape modulation in metal nanoparticle synthesis†","authors":"Khalid Naim, Prodipta Samadder, Atikur Rahman, Subash Chandra Sahoo and Prakash P. Neelakandan","doi":"10.1039/D5TC00047E","DOIUrl":"https://doi.org/10.1039/D5TC00047E","url":null,"abstract":"<p >Stimuli-responsive fluorescent materials are gaining significant attention in the development of smart materials, particularly for applications in sensing, drug delivery, and environmental monitoring. In this study, we demonstrate how molecular engineering can transform simple naphthalidenimine-boron complexes-known for their remarkable photophysical properties-into functional materials with pH- and temperature-sensitive luminescence. Detailed crystallographic and spectroscopic analyses reveal the critical role of the donor moiety in modulating charge-transfer interactions, which not only enhance the photophysical characteristics but also introduce stimuli-responsive behaviour. Additionally, the gradual, sustained proton release from these molecules facilitates metal nanoparticle synthesis, which aids in surface passivation and controls nanoparticle growth kinetics, resulting in well-defined shapes. This research underscores the potential of molecular engineering to design advanced materials with tailored, responsive properties, opening new avenues for applications where environmental adaptability is key.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7093-7101"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769628","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}

{"title":"Disentangling the structure, optical properties, and photoluminescence emissions of NiW1−xMoxO4 (x = 25, 50, and 75%) solid solutions: experimental and DFT studies†","authors":"Amanda Fernandes Gouveia, Marcelo Assis, Lara Kelly Ribeiro, Eduardo de Oliveira Gomes, Marcio Daldin Teodoro, Elson Longo and Juan Andrés","doi":"10.1039/D4TC05251J","DOIUrl":"https://doi.org/10.1039/D4TC05251J","url":null,"abstract":"<p >Solid solutions, formed by combining two transition metal oxides with distinct properties, offer promising potential for optimizing functional characteristics that may be lacking in the parent materials. In this study, NiWO<small>₄</small> and NiMoO<small>₄</small> semiconductors and homogeneous NiW<small>_{1−<em>x</em>}</small>Mo<small>_<em>x</em></small>O<small>₄</small> (<em>x</em> = 25, 50, and 75%) solid solutions were successfully synthesized <em>via</em> a co-precipitation method followed by heat treatment, without any surfactants or toxic solvents. Using a combination of characterization techniques—including X-ray diffraction, Raman and infrared spectroscopy, X-ray fluorescence, diffuse reflectance spectroscopy, and photoluminescence (PL) spectroscopy—alongside density functional theory calculations, we elucidate the relationship between the structure, electronic properties, and PL emissions at the atomic level. Furthermore, we propose a relay mechanism in the conduction band, where an electron transport ladder through the Ni–O–W/Mo framework acts as a driving force to modulate PL emissions.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 13","pages":" 6788-6798"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d4tc05251j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716563","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}

{"title":"Supramolecular and electrical properties of ruthenium-based organometallic gels†","authors":"Ilknur Hatice Eryilmaz, William Gallonde, Elsa Caytan, Olivier Jeannin, Franck Camerel, Stéphane Rigaut, Olivier Galangau and Emanuele Orgiu","doi":"10.1039/D4TC04486J","DOIUrl":"https://doi.org/10.1039/D4TC04486J","url":null,"abstract":"<p >A novel organometallic gel whose molecular building block contains either one (Ru<small>₁</small>) or two Ru (Ru<small>₂</small>) atoms is presented, and its supramolecular properties in solution have been investigated. Its electrical characterization revealed that when Ru<small>₁</small> is used to form an organometallic gel, such a gel becomes highly sensitive to the presence of a common organic solvent, while when a Ru<small>₂</small> gel is employed the solvent modified electrical performances are preserved over days.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7393-7401"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769638","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}

{"title":"The ESIPT-suppressed 2-(2′-hydroxyphenyl)benzoxazole derivative as a new photoinitiator for multiphoton polymerization†","authors":"João V. P. Valverde, André L. do S. Romero, Renan Cunha, Rafael de Q. Garcia, Timothée Stoerkler, Julien Massue, Leonardo De Boni and Cleber R. Mendonça","doi":"10.1039/D4TC05477F","DOIUrl":"https://doi.org/10.1039/D4TC05477F","url":null,"abstract":"<p >The quest for new photoinitiators (PIs) capable of efficiently absorbing multiple photons, particularly three photons, has intensified due to the multiphoton polymerization (MPP) technique. MPP enables the fabrication of next-generation photonic micro- and nanodevices with resolution beyond the diffraction limit and without shape limitation, offering considerable advantages over other methods. However, designing organic compounds acting as effective multiphoton PIs while enabling smart functionalization of manufactured structures remains challenging. In this contribution, we report using a <em>2-(2</em>′-<em>hydroxyphenyl)benzoxazole</em> (<strong>HBO</strong>) derivative, named <strong>HBO-NBu<small>₂</small></strong>, as a PI for two- and three-photon polymerization. <strong>HBO</strong> fluorophores are well-known to undergo an excited-state intramolecular proton transfer (ESIPT) process, but in this structure, the combination of a planar and linear push–pull dipolar structure, with an extensive π-conjugation, led to a complete suppression of ESIPT, subsequently exhibiting an excellent nonlinear response. Herein, we investigate the linear photophysical properties, excited-state dynamics, and multiphoton absorption of <strong>HBO-NBu<small>₂</small></strong>, supported by quantum chemical calculations. Our results demonstrate that <strong>HBO-NBu<small>₂</small></strong> exhibits structural rigidity, resulting in a fluorescence quantum yield of 62% in dichloromethane solution, owing to the absence of ESIPT and substantial intramolecular charge transfer (ICT) due to its push–pull nature. Moreover, this molecule shows significant two- and three-photon absorption cross-sections of 80 GM (at 800 nm) and 4 ± 1 × 10<small>⁻⁸¹</small> cm<small>⁶</small> (s per photon)<small>²</small> (at 1030 nm), respectively. Finally, we demonstrate a proof of concept of MPP using <strong>HBO-NBu2</strong> as a PI, showing that even at low concentrations, it outperforms widely used PIs.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7130-7139"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769631","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}

{"title":"Fabry–Pérot interference-enhanced GaSe visible-blind UV photodetectors†","authors":"Li-Yan Liang, Zi-Hao Guo, Xin-Hui He, Wei Shu, Chun-Yan Wu, Shi-Rong Chen, Ji-Gang Hu, Yu-Xue Zhou and Lin-Bao Luo","doi":"10.1039/D5TC00139K","DOIUrl":"https://doi.org/10.1039/D5TC00139K","url":null,"abstract":"<p >In this letter, we report the fabrication of an asymmetric Fabry–Pérot (F–P) structure by planar stacking of a GaSe nanosheet, Al<small>₂</small>O<small>₃</small> spacer and Al back reflector. For selective absorption enhancement in UV region, the Al<small>₂</small>O<small>₃</small> thickness was optimized to be 91 nm by the finite-difference time-domain (FDTD) solution. Compared with the device without the asymmetric F–P structure, the responsivity (<em>R</em>) and photoconductive gain (<em>G</em>) of the device were improved by one order of magnitude, giving a highest response at 265 nm illumination and the values of 1.08 A W<small>⁻¹</small> and 5.05 at the weak light intensity of 20 μW cm<small>⁻²</small>, respectively. The UV-to-visible rejection ratio (<em>R</em><small>₂₆₅</small>/<em>R</em><small>₄₃₀</small>) was also improved from 2.7 to 10.9, revealing the wavelength-selective absorption enhancement in the UV region. This work offers a promising strategy for high-performance UV photodetectors with potential applications in the new-generation market for miniaturized, bendable, and wearable devices.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 11","pages":" 5490-5495"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611933","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}

{"title":"Enhancing the stability of Cs3Bi2Br9 quantum dots for anti-counterfeiting applications in leather through polyacrylate coating","authors":"Dangge Gao, Xin Bao, Bin Lyu, Zhixin Chen, Ailin Zhang and Jianzhong Ma","doi":"10.1039/D4TC04709E","DOIUrl":"https://doi.org/10.1039/D4TC04709E","url":null,"abstract":"<p >The growing demand for anti-counterfeiting technology has drawn attention to the emerging perovskite quantum dots (QDs). However, the poor stability of these materials is the main obstacle in their the application for reliable anti-counterfeiting. In this work, we propose an effective approach for the preparation of highly stable all-inorganic Bi-based QDs using a polyacrylate (PA) coating, achieving a photoluminescence intensity retention of 95% even after 71 h of UV irradiation. Using the leather finishing technology, PA/Cs<small>₃</small>Bi<small>₂</small>Br<small>₉</small> QDs were used as a smart concealed finishing agent to prepare fluorescent anti-counterfeiting leather. More importantly, the fluorescence effect was efficiently sustained even though the fluorescent anti-counterfeiting leather was crudely treated by water-soaking, UV light treatment, bending and rubbing treatment. This research provides effective strategies to improve the stability of Cs<small>₃</small>Bi<small>₂</small>Br<small>₉</small> QDs and a new idea for leather anti-counterfeiting applications.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 14","pages":" 7327-7335"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769606","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}