Chemistry of Materials最新文献

{"title":"","authors":"Nan Hou, Xue Liu, Quanlong Xu, Haihong Wen, Yinliang Yang, Huile Jin, Wei Wang*, Yun Yang* and Shun Wang*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 14","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.chemmater.5c00792","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671751","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":"","authors":"Teresa Insinna, Anne-Laure Barra and Clare P. Grey*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 14","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.chemmater.5c00845","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671777","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":"","authors":"Jeong Rae Kim, Sandra Glotzer, Evan Krysko, Matthew R. Barone, Jinkwon Kim, Salva Salmani-Rezaie, Adrian Llanos and Joseph Falson*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 14","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.chemmater.5c01074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671763","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":"","authors":"Shaun O’Donnell, Ian A. Leahy, Subhendu Jana, Eric A. Gabilondo, P. Shiv Halasyamani, Paul A. Maggard* and Rebecca W. Smaha*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 14","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.chemmater.5c00421","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671774","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":"","authors":"Ludmila Taskesen, Robert D. Smyth, Lemuel E. Crentsil, James I. Murrell, Emmanuelle Suard, Pascal Manuel and Simon J. Clarke*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 14","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":7.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.chemmater.5c00996","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671783","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":"Anchoring Bulky Moieties to Multi-Resonant Nanographenes for Solution-Processed OLEDs with High Efficiency and Narrowband Emission","authors":"Hao Luo, Xuming Zhuang, Weifeng Zhang, Shuai Yang, Wei Huang, Chang Cui, Jinbei Wei, Gui Yu","doi":"10.1021/acs.chemmater.5c01400","DOIUrl":"https://doi.org/10.1021/acs.chemmater.5c01400","url":null,"abstract":"Nanographenes (NGs) are highly promising emitters for efficient organic light-emitting diodes (OLEDs) due to their rigid planar structures and tunable molecular designs, enabling the construction of multiple-resonant (MR) fluorophores through heteroatom incorporation for narrowband emission. However, the poor solubility and strong π–π intermolecular stacking often hinder the development of solution-processable emitters with superior photophysical properties. In this study, we designed two MR-type indolo[3,2,1-<i>jk</i>]carbazole (ICz)-based NGs featuring sterically hindered, nonfully conjugated peripheral substituents. These structural modifications effectively suppress tight intermolecular packing and enhance solubility, resulting in high photoluminescence quantum yields (PLQYs) of ≥95% and narrow emission spectra with full widths at half-maximum (FWHMs) of ≤30 nm. When employed in solution-processed OLEDs, these emitters achieved outstanding maximum external quantum efficiencies exceeding 22%, along with narrow electroluminescence (FWHMs ≤33 nm) and state-of-the-art low efficiency roll-offs even at high brightness.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622608","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":"Area-Selective Atomic Layer Deposition through Selective Passivation of SiO2 with a SF6/H2 Plasma","authors":"Olaf C. A. Bolkenbaas, Marc J. M. Merkx, Nicholas J. Chittock, Ilker Tezsevin, Wilhelmus M. M. Kessels, Tania E. Sandoval, Adriaan J. M. Mackus","doi":"10.1021/acs.chemmater.4c03316","DOIUrl":"https://doi.org/10.1021/acs.chemmater.4c03316","url":null,"abstract":"Area-selective atomic layer deposition (ALD) has gained widespread interest in the semiconductor industry to facilitate the continued drive for more powerful and efficient devices. In this work, we chemically passivate SiO₂ with a single SF₆/H₂/Ar plasma pretreatment to selectively deposit TiO₂ on ZnO, HfO₂, or Al₂O₃, using tetrakis(dimethylamido)titanium (TDMAT) and H₂O. The SF₆/(H₂ + SF₆) flow ratio was tuned to suppress the etching of SiO₂ while the nucleation delay of TiO₂ ALD was maximized. A plasma with an SF₆/(SF₆ + H₂) ratio of 0.24 etched less than 1 Å and gave the longest nucleation delay at a substrate temperature of 150 °C. After this pretreatment, 2.1, 2.0, and 1.6 nm of TiO₂ can be deposited with a selectivity of 90% with respect to a SiO₂ nongrowth area on HfO₂, Al₂O₃, or ZnO respectively. In-situ reflection absorption infrared spectroscopy (RAIRS) measurements show that during the SF₆/H₂/Ar plasma, Si–OH and Si–H surface groups are replaced by Si–F groups, suggesting that full chemical passivation of SiO₂ is achieved. The reaction of TDMAT with a F-terminated SiO₂ surface is shown to be unfavorable using density functional theory (DFT) calculations. Furthermore, RAIRS measurements and DFT simulations show that after the plasma treatment, precursors do react on fluorinated Al₂O₃. Taken together, the results of this study show that using a plasma pretreatment for chemical passivation of the nongrowth area provides interesting opportunities for future ASD processes.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"11 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622610","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":"Structural Dynamics Behind the Formation of α′-Ni3Ga Alloy Nanoparticles from a Ni–Ga Phyllosilicate Dispersed on Silica Using X-ray Probes","authors":"Nora K. Zimmerli, Diana Piankova, Agnieszka Kierzkowska, Stefano Checchia, Felix Donat, Christoph R. Müller, Paula M. Abdala","doi":"10.1021/acs.chemmater.5c01040","DOIUrl":"https://doi.org/10.1021/acs.chemmater.5c01040","url":null,"abstract":"This study investigates the structural evolution during the formation of α′-Ni₃Ga alloy nanoparticles from Ni–Ga phyllosilicate sheets upon heating in H₂. The phyllosilicate sheets were produced through a deposition–precipitation process using Ni and Ga nitrates and colloidal SiO₂. Advanced characterization techniques, including X-ray absorption spectroscopy, pair distribution function analysis, and electron microscopy, revealed the structure of the chrysotile-type phyllosilicates. Such phyllosilicates are composed of brucite-like layers with Ni²⁺ in octahedral coordination with oxygen (NiO₆), intercalated by layers of silica tetrahedra (SiO₄). Ga³⁺ ions partially replaced Ni²⁺ in octahedral positions within the brucite-like layers, but are also found in tetrahedral coordination, substituting Si⁴⁺ within the SiO₄ layers of the phyllosilicate phase and/or dispersed on/in the surface of the amorphous SiO₂ support. The structural transformation of the precursor material during thermal activation in H₂ was monitored by d-PDF and XAS. It was observed that the decomposition of the Ni–Ga phyllosilicate starts in the temperature range 290–310 °C, resulting in the formation of small nickel-rich nanoparticles and gallium oxide (GaO_<i>x</i>) species. As the temperature is increased, Ga is reduced and is incorporated into the metallic nickel structure, ultimately forming intermetallic α′-Ni₃Ga nanoparticles with an average size of about 5 nm. Our findings provide a detailed mechanistic understanding of the structural evolution of the phyllosilicate-based precursor, including alloy/intermetallic formation under thermal reduction conditions and highlight the potential of mixed-metal phyllosilicates as precursors for bimetallic catalysts.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"23 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622609","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":"Divalent Methylhydrazinium─An Ultrasmall Organic Cation for Construction of Hybrid Perovskites","authors":"Mirosław Mączka, Anna Gagor, Dagmara Stefanska, Jerzy Hanuza, Edyta Kucharska, Jan K. Zareba","doi":"10.1021/acs.chemmater.5c00919","DOIUrl":"https://doi.org/10.1021/acs.chemmater.5c00919","url":null,"abstract":"Hybrid lead halide perovskites exhibit remarkable optoelectronic properties that can be tailored by incorporating diverse organic cations. Monoprotonated methylhydrazine (MHy⁺) has emerged as an effective cation for constructing perovskites with unique properties due to its intrinsic ability to form Pb–N coordination bonds, small size, and high dielectric permittivity. In this work, we enter the uncharted territory of hybrid perovskites comprising ultrasmall diprotonated amines. We show that methylhydrazine can exist in a diprotonated form (MHy²⁺) in hybrid perovskites, enabling the design of compounds with enhanced nonlinear optical responses, unconventional crystal architectures, and tunable emission properties. Using strongly acidic conditions at elevated temperatures, we obtained three distinct MHy²⁺-based lead halides: polar MHy^IIPb₂Cl₆·2H₂O (<i>P</i>2₁) and MHy₂^IIMHy^IPb₂Br₈Br (<i>Pna</i>2₁), as well as centrosymmetric GAMHy^IIPbBr₅ (<i>P</i>2₁/<i>m</i>), where GA⁺ stands for guanidinium. Structural study reveals that MHy²⁺ drives unprecedented architectures, including Br^–/Pb²⁺-deficient trilayered Dion-Jacobson phase in MHy₂^IIMHy^IPb₂Br₈Br with mixed mono/diprotonated cation coexistence. MHy^IIPb₂Cl₆·2H₂O, a compound which involves only MHy²⁺ as an organic constituent, exhibits a warm white emission (CIE 0.32, 0.38 at 80 K) through dual bound/self-trapped exciton recombination and demonstrates a second-harmonic generation (SHG) efficiency of 0.51 × KDP, nearly three times higher than MHy⁺-based analogues. MHy₂^IIMHy^IPb₂Br₈Br shows a narrow purplish-blue emission (fwhm of 8 nm) and SHG activity comparable to those of extant 2D MHy⁺ perovskites. This discovery expands the toolkit for a hybrid perovskite design, establishing methylhydrazine as an ultrasmall amine capable of incorporating two different protonation states and opening avenues for developing advanced optoelectronic materials with enhanced nonlinear optical properties and tunable emissions.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"29 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622614","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":"Competing Magnetism in Layered Mixed Transition Metal Chalcogenides KCo2–xNixSe2, KCo2–xNixS2, and CsCo2–xNixSe2","authors":"Ludmila Taskesen, Robert D. Smyth, Lemuel E. Crentsil, James I. Murrell, Emmanuelle Suard, Pascal Manuel, Simon J. Clarke","doi":"10.1021/acs.chemmater.5c00996","DOIUrl":"https://doi.org/10.1021/acs.chemmater.5c00996","url":null,"abstract":"Layered transition metal chalcogenides are a versatile class of compounds that exhibit exotic physical phenomena, including superconductivity, thermoelectric properties and magnetic properties. The magnetic properties of ThCr₂Si₂-type solid solutions KCo_2–<i>x</i>Ni_<i>x</i><i>Ch</i>₂ (<i>Ch</i> = S, Se; 0 ≤ <i>x</i> ≤ 2) with metallic properties were probed using magnetometry and powder neutron diffraction (PND). KCo₂Se₂ is ferromagnetic below ∼90 K and powder neutron diffraction (PND) showed evidence for long-range ferromagnetic order with localized moments of 0.6 μ_B per cobalt ion. With increasing nickel substitution, the system starts to order antiferromagnetically at <i>x</i> = 0.5. In these cases, PND experiments showed long-range A-type antiferromagnetic order with localized moments of around 1 μ_B per transition metal at 5 K. The Néel temperature (<i>T</i>_N) for three-dimensional long-range ordering exhibits a maximum at <i>x</i> = 1, suggesting that nickel substitution enhances the antiferromagnetic interactions along the stacking direction. Higher nickel content suppresses the magnetic ordering temperature, and KCo_0.5Ni_1.5Se₂ shows no magnetic long-range order with a lack of measurable Bragg peaks by PND (although a magnetic transition is evident by magnetometry), and further increasing the nickel content causes the system to become paramagnetic in the region 1.6 ≤ <i>x</i> ≤ 2. Our results show that increasing the electron count in the KCo_2–<i>x</i>Ni_<i>x</i>Se₂ series has a dramatic effect on the physical properties. The analogous sulfide series - KCo_2–<i>x</i>Ni_<i>x</i>S₂─shows similar behavior, and the series CsCo_2–<i>x</i>Ni_<i>x</i>Se₂, containing a larger alkali metal ion, is comparable apart from the lack of a ferromagnetic region at high Co contents in the absence of an applied magnetic field.","PeriodicalId":33,"journal":{"name":"Chemistry of Materials","volume":"37 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622437","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}