Materials Chemistry Frontiers最新文献

{"title":"Inorganic Ge-based ferroelectric perovskites towards quasi-phase-matching in the infrared region","authors":"Guifu Zhang, Xiantan Lin, Xiaoqi Li, Xiaoyu Zhang, Yikun Fu, Qianxi Wang, Yicong Lv, Yan Fu, Wan Luo and Xitao Liu","doi":"10.1039/D6QM00123H","DOIUrl":"https://doi.org/10.1039/D6QM00123H","url":null,"abstract":"<p >Nonlinear optical crystals are crucial materials in laser technology. In the field of infrared quasi-phase-matching, high-quality output has been achieved using a limited set of materials, such as periodically poled LiNbO<small>₃</small> and LiTaO<small>₃</small>. However, the scarcity of high-performance infrared nonlinear optical crystals and suitable periodically structured materials has restricted further progress in infrared quasi-phase-matching. Herein, two Ge-based ferroelectric perovskites, CsGeCl<small>₃</small> (CGC) and CsGeBr<small>₃</small> (CGB), were synthesized, which exhibit a broad transmission window (covering 0.5–25 µm) and strong second harmonic generation responses (1.6 × AGS for CGC and 12.0 × AGS for CGB at 2050 nm). Furthermore, both compounds show ferroelectricity with spontaneous polarizations of 6.6 µC cm<small>⁻²</small> and 19.3 µC cm<small>⁻²</small>, respectively. The induction and erasure processes of periodic ferroelectric domain structures in CGC were observed. These properties underscore its great potential for broadband infrared quasi-phase-matching applications. This work highlights the significance of ferroelectrics in quasi-phase-matching and provides new opportunities for halide perovskites in nonlinear optics and integrated photonics.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 12","pages":" 1966-1975"},"PeriodicalIF":8.1,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148261505","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":"Non-flammable fluorine-phosphorus-based polymer electrolytes for high-performance all-solid-state lithium metal batteries","authors":"Enchi Hu, Songtao Li, Guanyu Zhong, Zhengtao Mai, Siheng Zhang, Jianda Niu, Zhixian Dong, Jinbao Xu, Zhan Wang and Caihong Lei","doi":"10.1039/D6QM00205F","DOIUrl":"https://doi.org/10.1039/D6QM00205F","url":null,"abstract":"<p >All-solid-state polymer electrolytes (ASSPEs) are pivotal for next-generation lithium metal batteries (LMBs), yet achieving synergy between high ionic conductivity and intrinsic non-flammability remains a significant challenge. Herein, a novel non-flammable fluorine/phosphorus-containing ASSPE is fabricated <em>via</em> the <em>in situ</em> polymerization of TFEA, DABP, and PEGMA. This molecular design constructs a robust crosslinked network where the synergistic effect of fluorine and phosphorus segments ensures both structural integrity and active fire suppression. The resulting TDP-based electrolyte exhibits superior ionic conductivity (10<small>⁻⁴</small> S cm<small>⁻¹</small>) and a wide electrochemical window (5.5 V), ensuring excellent compatibility with the lithium metal anode. This work highlights the transition from flammable to intrinsically safe ASSPEs, providing an effective strategy for high-performance and secure all-solid-state energy storage systems.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 11","pages":" 1891-1901"},"PeriodicalIF":6.4,"publicationDate":"2026-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104188","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":"Synergistic effect of urchin-like NiCo2O4/SnS2 nanocomposites toward stable lithium-ion storage","authors":"Appu S., Anusha B. R., Udayabhanu, Muhiuddin M., Rahman M. R. and Prashantha K.","doi":"10.1039/D5QM00899A","DOIUrl":"https://doi.org/10.1039/D5QM00899A","url":null,"abstract":"<p >Nanocone-assembled urchin-like NiCo<small>₂</small>O<small>₄</small>/SnS<small>₂</small> (NCOSS) nanocomposites were synthesized <em>via</em> a facile solvothermal method and systematically characterized using XRD, FTIR, Raman, FESEM, TEM, XPS, and BET analyses. The results confirm the formation of a crystalline, mesoporous heterostructure with strong interfacial coupling and a high specific surface area. The unique urchin-like nanocone architecture effectively facilitates ion transport and mitigates volume expansion during cycling. When evaluated as a lithium-ion battery anode, the NCOSS electrode delivered a high initial discharge capacity of 1545 mAh g<small>⁻¹</small> at 0.1 A g<small>⁻¹</small>, with an initial irreversible capacity loss of 19.91%. Notably, it exhibited excellent cycling stability, retaining 625 mAh g<small>⁻¹</small> after 200 cycles, and superior rate performance with 88.88% capacity retention from 0.1 to 2 A g<small>⁻¹</small>. Electrochemical impedance spectroscopy revealed reduced charge-transfer resistance compared to pristine NiCo<small>₂</small>O<small>₄</small> (NCO), while kinetic analysis indicated dominant pseudocapacitive contributions (47.82–70.80%), enabling high reversible capacity at elevated current densities. These results demonstrate that NCOSS is a promising anode material for high-performance lithium-ion batteries.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 11","pages":" 1789-1802"},"PeriodicalIF":6.4,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104180","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":"Single-molecule-like intramolecular charge transfer in a multi-nitrogen hybridization HOF for selective water detection","authors":"Yixin Chen, Zhuoyan Dong, Qianni Peng, Gaoyan Lan, Difeng Yang, Zizhu Yao, Kang Wang, Shengchang Xiang, Yuanchao Lv and Zhangjing Zhang","doi":"10.1039/D6QM00093B","DOIUrl":"https://doi.org/10.1039/D6QM00093B","url":null,"abstract":"<p >Luminescent organic crystals have attracted significant attention due to their potential in sensing and anti-counterfeiting, yet organic molecules frequently adopt a strong aggregation tendency with dense stacking and short intermolecular distances, leading to a barrier for the dynamic signal output of a single molecule. Herein, we report a single-molecule-like dynamic emission from a low-aggregated hydrogen-bonded organic framework (HOF) system <em>via</em> a multi-nitrogen hybridization strategy. A HOF with a donor–acceptor structure was designed <em>via</em> hybridizing the nitrogen atoms into both the aromatic backbone and the hydrogen-bond acceptor. The designed HOF permits the exposure of nitrogen-based recognition sites in channels, which easily triggers the charge interactions with external solvent molecules, especially water molecules, resulting in a polarity-regulated intramolecular charge transfer (ICT) process, akin to that of a single building block. On this basis, this HOF system exhibits highly selective water-responsive emission behavior, displaying a distinctive yellow emission, which can effectively identify trace water in the air, accompanied by a red shift from about 520 nm to 560 nm, further serving as a humidity-controlled anti-counterfeiting platform. These results present a promising strategy for constructing dynamic single-molecule-like emission systems tailored for highly efficient anti-counterfeiting.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 11","pages":" 1862-1871"},"PeriodicalIF":6.4,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104185","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":"Self-healing hybrids via dual noncovalent networks using urethane/imidazole–zinc functionalized silsesquioxane nanoparticles","authors":"Mahmoud A. Abdelkawy, Akihiro Nishioka and Hideharu Mori","doi":"10.1039/D6QM00019C","DOIUrl":"https://doi.org/10.1039/D6QM00019C","url":null,"abstract":"<p >This study presents the design of imidazole/urethane-functionalized silsesquioxane nanoparticles (SQNPs) that enable rapid self-healing through dynamic Zn–imidazole coordination and hydrogen bonds. Methylimidazole/hydroxyl-functionalized SQNPs (MI/OH-SQNPs) were prepared using epoxy-functionalized SQNPs and reacted with structurally diverse isocyanates, phenyl isocyanate (PU), hexamethylene diisocyanate (HMU), and methylenediphenyl diisocyanate (MDU), to yield MI/PU-, MI/HMU-, and MI/MDU-SQNPs, respectively. Extensive characterization (using nuclear magnetic resonance, Fourier-transform infrared (FT-IR) spectroscopy, size-exclusion chromatography, differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction analysis, transmission electron microscopy, and atomic-force microscopy) showed a uniform dispersion of approximately 10 nm, an amorphous structure, excellent solubility, and good thermal stability (&gt;230 °C). The drop-cast films of the imidazole/urethane-SQNP-Zn hybrids exhibited flexural moduli of 1.52, 1.86, and 4.08 GPa for MI/PU-, MI/HMU-, and MI/MDU-SQNPs, respectively, reflecting the effects of urethane linker rigidity, crosslink density, and covalent/noncovalent interactions. MI/PU-SQNP-Zn formed dual noncovalent networks combining hydrogen bonding and metal–ligand coordination, providing moderate stiffness with increased toughness. In contrast, MI/MDU-SQNP-Zn, which contained rigid aromatic segments, exhibited the highest modulus and strength. Zn coordination was confirmed <em>via</em> FT-IR spectroscopy, and transparent films (up to 99.6% transmittance at 400 nm) were produced. The formation of mechanically robust hybrid networks was confirmed <em>via</em> dynamic mechanical analysis, highlighting its ability to maintain structural integrity while allowing dynamic bond exchange. Scanning electron microscopy–energy dispersive spectroscopy confirmed the successful incorporation and uniform distribution of Zn within all hybrid networks. These Zn-complexed systems exhibited promising self-healing performances: MI/PU-, MI/HMU-, and MI/MDU-SQNP-Zn hybrids achieved ∼87%, ∼78.5%, and ∼35% recovery of their mechanical integrity, respectively, which was governed by the flexibility or rigidity of the urethane segments. Additionally, MI/PU-SQNP-Zn demonstrated rapid thermal self-healing, recovering approximately 68% of its strength within 60 min at 50 °C and visibly healed in 10 s at 80 °C. These findings indicate that Zn-coordinated imidazole–urethane SQNPs offer a versatile platform for creating mechanically robust self-healing hybrid materials with promising applications in coatings, glassy materials, and functional composites.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 10","pages":" 1691-1704"},"PeriodicalIF":6.4,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147958943","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":"Toroidal ferroelectric cobalt-doped barium titanates as efficient energy conversion materials for solar cells and photocatalysis","authors":"Murali Balu, Duraisamy Kumaresan, R. Krishna Prasad and Subhash Kalidindi","doi":"10.1039/D5QM00765H","DOIUrl":"https://doi.org/10.1039/D5QM00765H","url":null,"abstract":"<p >Doughnut-shaped ferroelectric barium titanate (BTDS) and cobalt-doped barium titanate (CBTDS) [Co<small>_<em>x</em></small>BaTi<small>_{1−<em>x</em>}</small>O<small>₃</small> (<em>x</em> = 0 or 0.05 mol%)] nanostructures have been synthesized from hydrogen titanate nanowires for use as efficient photon energy conversion materials in dye-sensitized solar cells (DSSCs) and photocatalytic dye degradation applications. The morphological and structural analyses have revealed that the perovskite BDTS and CBDTS nanostructures exhibit toroidal ferroelectric characteristics, which are reinforced by the formation of oxygen vacancies and Ti<small>³⁺</small> ions within their lattices. The DSSC bilayer photoanodes constructed using mesoporous TiO<small>₂</small> nanoparticles (TNP) as the underlayer and CBTDS as the light-scattering and charge-collecting upper layer have shown the highest photovoltaic efficiency of 10.29 ± 0.44% due to the greater light scattering, light absorption extended to the near-infrared region, and toroidal ferroelectric field-induced slower charge recombination effects that collectively boosted the photovoltaic performance. Moreover, the photocatalytic dye-degradation performance of the CBTDS photocatalyst has demonstrated a maximum dye degradation efficiency of 86.74% over 75 minutes, indicating a respectable photocatalytic activity compared to the BTDS photocatalyst. These results have confirmed that superior morphology control, oxygen vacancy, and Ti<small>³⁺</small> ion formation in the BTDS and CBTDS nanostructures strongly influence toroidal ferroelectric field-induced charge separation and light-harvesting ability in dye-sensitized solar cells (DSSCs) and photocatalysts, leading to superior performance.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 11","pages":" 1835-1849"},"PeriodicalIF":6.4,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104183","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":"Emerging metal–organic framework-based materials for photocatalytic nitrogen reduction reactions","authors":"Liting Chen, Longqi Li, Yaqin Yu, Xinyu Luo, Yuanyuan Gao, Yipeng Chen, Yin Xiao, Shixiang Feng, Li Shuai and Guangfu Liao","doi":"10.1039/D6QM00109B","DOIUrl":"https://doi.org/10.1039/D6QM00109B","url":null,"abstract":"<p >Metal–organic framework (MOF)-based materials have emerged as highly promising candidates for the photocatalytic nitrogen reduction reaction (NRR), owing to their well-defined porous architectures, unparalleled structural tunability, and abundant accessible active sites. Establishing a clear structure–performance relationship for MOF-based systems is pivotal to advancing scalable and sustainable nitrogen fixation technologies. This review provides a systematic overview of recent progress in this rapidly evolving field and outlines a roadmap to guide future research endeavors. First, it elaborates on the synthetic methodologies and functionalization strategies of MOFs, followed by a critical discussion of the structural design principles for MOFs and their composite or derived materials. Next, it presents a comprehensive evaluation of MOF-based materials for the photocatalytic NRR. Finally, after an in-depth analysis of current challenges and bottlenecks, this review outlines prospective research directions, offering valuable theoretical and practical guidance for the rational design of next-generation catalysts toward green NH<small>₃</small> synthesis.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 8","pages":" 1212-1241"},"PeriodicalIF":6.4,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147720913","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":"Preparation of copper-doped calcium phosphate nanoclusters to enhance copper-mediated catalytic activity","authors":"Zi-You Ding, Jia Chen, Xinli Tang, Wuqing Cao and Yingchao Han","doi":"10.1039/D6QM00025H","DOIUrl":"https://doi.org/10.1039/D6QM00025H","url":null,"abstract":"<p >Calcium phosphate (CaP), a critical bone mineral in mammals, exhibits promising potential for application in biomedicine. In this study, we report a biomimetic mineralization strategy, based on a stoichiometric polyacrylic acid (PAA) complexation–precipitation method, to prepare copper-doped calcium phosphate nanoclusters (Cu–CaP NCs). This systematic investigation focuses on the effect of nanocluster structure on copper-mediated catalytic activity. A series of Cu–CaP NCs (5%, 10%, 15%, 20%, and 25%) were successfully synthesized, demonstrating good mono-dispersity and a particle size of &lt;10 nm. Molecular dynamics (MD) simulations were performed to elucidate the mechanism by which the nanoclusters are formed. Cu<small>²⁺</small> ions (∼10 ns) exhibited faster complexation with PAA than Ca<small>²⁺</small> ions whereas the Cu<small>²⁺</small>–PAA interaction featured characteristic intramolecular five-membered chelate rings <em>via</em> quadruple coordination; in contrast, Ca<small>²⁺</small> tended to engage in nonspecific ionic crosslinking. The presence of HPO<small>₄</small><small>²⁻</small> ions further promoted the assembly of stable nanoclusters. PAA also played a role in the ligand-mediated spontaneous reduction of Cu(<small>II</small>) to Cu(<small>I</small>) within the nanocluster structure; accordingly, Cu-catalyzed Fenton-like reactivity was markedly enhanced. In addition, Cu–CaP NCs exhibited higher levels of responsiveness to glutathione (GSH). Hemolysis and cytotoxicity assays indicated a good biosafety profile for these novel NCs. More importantly, the growth of tumor cells (4T1, MG63, and Hep G2) was suppressed by Cu–CaP NCs in a dose-dependent manner. In summary, PAA-based Cu–CaP NCs represent an easily synthesized and low-toxicity therapeutic agent that utilizes Fenton-like reactivity for antitumor efficacy, thus providing a promising novel strategy for tumor treatment.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 11","pages":" 1821-1834"},"PeriodicalIF":6.4,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148104182","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":"Facile synthesis of tunable zinc–adenine frameworks for aptamer-based biological applications","authors":"Cong Minh Nguyen, Quang Thang Trinh, Nam-Trung Nguyen and Hang Thu Ta","doi":"10.1039/D6QM00114A","DOIUrl":"https://doi.org/10.1039/D6QM00114A","url":null,"abstract":"<p >Zinc-based metal–organic frameworks (ZnMOFs) have attracted significant attention in bioanalytical and biomedical applications owing to their structural tunability, biocompatibility, and potential for integration with molecular recognition elements. In this study, we report a facile aqueous synthesis of ZnMOFs using adenine as a nucleobase linker and explore their multifunctionality for aptamer-based biological applications. Density functional theory calculations revealed Zn–N coordination and Zn–cluster formation underpinning the inherently amorphous framework architecture. The resulting amorphous ZnMOF particles exhibited a controllable size and tunable surface charge through post-synthesis treatments such as polystyrene sulfonate treatment and sonication. Notably, the system enables direct incorporation of aptamers <em>via</em> their poly-adenine tails without post-synthesis biofunctionalization steps. Incorporation of ZnMOFs with a VCAM-1 aptamer enhanced fluorescence signals in the immunofluorescence assay and flow cytometry, providing a sensitive platform for biomolecular detection. Additionally, ZnMOFs decorated with a CD63 aptamer enabled selective exosome capture with gentle recovery, maintaining the biomarker's integrity for downstream quantitative reverse transcriptase loop-mediated isothermal amplification (qRT-LAMP) of exosomal RNA. Collectively, our findings establish ZnMOFs as simple, versatile, and tunable platforms for aptamer-based sensing and exosome isolation, with broad potential for biological and biomedical applications.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 10","pages":" 1594-1602"},"PeriodicalIF":6.4,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147958900","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":"Double decker NHC-cyclometallated Pt complexes for highly-efficient vacuum-deposited green OLEDs and NIR emission","authors":"Irene Melendo, Lucy A. Weatherill, Antonio Martín, Piotr Pander, Fernando B. Dias, Sara Fuertes and Violeta Sicilia","doi":"10.1039/D6QM00041J","DOIUrl":"https://doi.org/10.1039/D6QM00041J","url":null,"abstract":"<p >The dinuclear compound [{Pt<small>^II</small>(C^C*)(µ-N^N)}<small>₂</small>] (HN^N: diphenylformamidine; HC^C* = 3-methyl-1-(naphthalen-2-yl)-1<em>H</em>-imidazol-2-ylidene, <strong>3</strong>) was obtained as a pure single <em>anti</em>-isomer, with a Pt–Pt distance of 2.8645 Å. Under UV light, <strong>3</strong> reacted with haloforms to obtain the corresponding oxidized species [{Pt<small>^III</small>(C^C*)(µ-N^N)X}<small>₂</small>] (<strong>4-X</strong>). X-ray analysis of <strong>4-Cl</strong> confirmed the retention of the <em>anti</em>-conformation and revealed a shortened Pt–Pt distance (2.6070 Å) consistent with metal–metal bonding in the Pt<small>₂</small>(<small>III,III</small>) system. In addition, methylation of the electron-rich complex <strong>3</strong> with [Me<small>₃</small>O]BF<small>₄</small> provided the mixed-valence dinuclear species [(C^C*)Pt<small>^II</small>(µ-N^N)<small>₂</small>Pt<small>^IV</small>(C^C*)(CH<small>₃</small>)]BF<small>₄</small> (<strong>5</strong>), which exhibits two distinct <small>¹⁹⁵</small>Pt NMR resonances (<em>δ</em>: −2373 and −3264 ppm) and a large Pt–Pt coupling constant (2155 Hz). Compound <strong>3</strong> shows a structureless emission band at 520 nm in 2 wt% PMMA (poly(methyl methacrylate)) film, with a photoluminescence decay of 1.80 µs and quantum yield of 0.90, typical of triplet metal–metal–to-ligand charge transfer (<small>³</small>MMLCT) [d<em>σ</em>*(Pt–Pt) → π*(C^C*)] excited states. The oxidized counterparts, <strong>4-X</strong>, display phosphorescent emissions with maxima at 960, 970 and 1055 nm in solid state at 77 K. These are tentatively assigned to triplet axial ligand-to-metal–metal charge transfer (<small>³</small>XMMCT) [<em>σ</em>(X) → d<em>σ</em>*(Pt–Pt)]. Whilst complex <strong>5</strong> shows no emission in either the visible or near-infrared regions at 298 or 77 K. Organic light-emitting diodes (OLEDs) incorporating <strong>3</strong> as a green emitter demonstrate excellent device performance, achieving a turn-on voltage of 3 V, an external quantum efficiency (EQE) reaching 22% and a maximum luminance exceeding 22 000 cd m<small>⁻²</small>.</p>","PeriodicalId":86,"journal":{"name":"Materials Chemistry Frontiers","volume":" 10","pages":" 1633-1643"},"PeriodicalIF":6.4,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2026/qm/d6qm00041j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147958903","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}