The Royal Society of Chemistry最新文献_第2页

Aggregation-activated delayed and two-photon fluorescence in a charge-modulated pyridine-acridan luminophore. 电荷调制吡啶-吖啶酮发光团中聚集激活的延迟和双光子荧光。

IF 3 3区化学

Physical Chemistry Chemical Physics Pub Date : 2026-10-20 DOI: 10.1039/d6cp02166b

Rasa Keruckiene, Kaspars Leduskrasts, Ho-Chia Tsai, Mariia Stanitska, Daiana Ospanova, Dmytro Volyniuk, Edgars Suna, Shi-Wei Chu, J V Grazulevicius

{"title":"Aggregation-activated delayed and two-photon fluorescence in a charge-modulated pyridine-acridan luminophore.","authors":"Rasa Keruckiene, Kaspars Leduskrasts, Ho-Chia Tsai, Mariia Stanitska, Daiana Ospanova, Dmytro Volyniuk, Edgars Suna, Shi-Wei Chu, J V Grazulevicius","doi":"10.1039/d6cp02166b","DOIUrl":"https://doi.org/10.1039/d6cp02166b","url":null,"abstract":"Molecular charge modulation offers a promising strategy for controlling the excited-state properties and aggregation behavior of organic luminophores. Nevertheless, the consequences of cationization strongly depend on the molecular structure. Herein, we investigate a twisted π-extended pyridine-dimethylacridan derivative (PyAcr) and its cationic pyridinium analogue (PyAcr+) to elucidate how neutral-to-cationic transformation affects their photophysical properties. Experimental characterization combined with theoretical calculations provides insight into the relationship between molecular structure, charge distribution, excited-state character, and emission behavior. PyAcr exhibits aggregation-induced delayed fluorescence (AIDF), accompanied by a moderate photoluminescence quantum yield of 45% and strong two-photon-excited fluorescence (TPEF) under near-infrared excitation. In contrast, conversion of PyAcr to PyAcr+ alters its aggregation behavior and results in substantially weakened emission, likely reflecting the combined effects of cation formation and the structural modification introduced upon quaternization. Both derivatives exhibit high thermal stability, with onset temperatures of thermal degradation above 360 °C, good electrochemical stability, and small singlet-triplet energy gaps of 0.07-0.13 eV. Overall, the results demonstrate that cationization alone does not necessarily enhance luminescence and that the interplay between molecular charge, electronic coupling, and aggregation is critical for controlling excited-state dynamics. These structure-property relationships provide useful guidelines for the rational design of environment-responsive luminophores, while PyAcr shows promise as a two-photon-excited probe for bioimaging.","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149222849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Starting material syntheses for non-aqueous molecular uranium chemistry. 非水分子铀化学原料合成。

IF 48.3 1区化学

Chemical Society Reviews Pub Date : 2026-10-20 DOI: 10.1039/d6cs00827e

León Hillers, Rupesh, Lisa Vondung

引用次数: 0

A novel Pd-metalated porous organic phenanthroline-based polymer for heterogeneous cyanation of aryl halides. 一种用于芳卤化合物异构氰化的新型钯金属化多孔有机菲罗啉聚合物。

IF 3.3 3区化学

Dalton Transactions Pub Date : 2026-10-20 DOI: 10.1039/d6dt02206e

Xuan Lai, Sanqi Liang, Wu Zhang, Jie Lin, Jiale Huang, Shunmin Ding, Shengjun Deng

引用次数: 0

(bpy)Cu(CF₃)₃: tunable reactivity in fluoroalkylation and fluorination.

IF 2.8 3区化学

Organic & Biomolecular Chemistry Pub Date : 2026-10-20 DOI: 10.1039/d6ob01204c

Min Xu, Shuolu Dai, Shan Long, Chuhong Xie, Taotao Huang, Wen-Xin Lv

{"title":"(bpy)Cu(CF3)3: tunable reactivity in fluoroalkylation and fluorination.","authors":"Min Xu, Shuolu Dai, Shan Long, Chuhong Xie, Taotao Huang, Wen-Xin Lv","doi":"10.1039/d6ob01204c","DOIUrl":"https://doi.org/10.1039/d6ob01204c","url":null,"abstract":"Organofluorine compounds play an indispensable role in modern pharmaceuticals, agrochemicals, and functional materials. Fluorine-containing groups such as trifluoromethyl (CF3) and difluoromethoxy (OCF2H) can significantly enhance lipophilicity, metabolic stability, hydrogen-bonding capability, and target-binding affinity, thereby serving as key structural units in drug design and activity optimization. Among various trifluoromethylation strategies, (bpy)Cu(CF3)3-an isolable and storable high-valent Cu-CF3 species-exhibits tunable reactivity that enables direct trifluoromethylation, defluorinative difluoromethylation, and P-F bond formation (fluorination). This review systematically summarizes recent advances in the application of (bpy)Cu(CF3)3 to fluorination and fluoroalkylation reactions and classifies these reactions into three mechanistic pathways: two-electron, single-electron radical, and difluorocarbene/fluoride pathways. The reaction mechanisms, structural characteristics, substrate scope, and synthetic applications are discussed in detail. Finally, current challenges and future opportunities in this field are discussed, aiming to provide guidance for the design of next-generation multifunctional fluorinating reagents and for the further development of organofluorine chemistry.","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A robust Hf_0.5Zr_0.5O₂ ferroelectric memory with high remanent polarization at 1 V and excellent stability up to 250 °C.

IF 5.2 3区材料科学

Nanoscale Pub Date : 2026-10-20 DOI: 10.1039/d6nr03057b

Hongdi Wu, Yecheng Ding, Guodong Zhang, Xubing Lu, Zhibo Yan, Jun-Ming Liu, Guoliang Yuan

{"title":"A robust Hf0.5Zr0.5O2 ferroelectric memory with high remanent polarization at 1 V and excellent stability up to 250 °C.","authors":"Hongdi Wu, Yecheng Ding, Guodong Zhang, Xubing Lu, Zhibo Yan, Jun-Ming Liu, Guoliang Yuan","doi":"10.1039/d6nr03057b","DOIUrl":"https://doi.org/10.1039/d6nr03057b","url":null,"abstract":"The 5.5 nm Hf0.5Zr0.5O2 (HZO) ferroelectric films exhibit a stable orthorhombic (o-) phase and outstanding memory performance near room temperature, achieving a remanent polarization (Pr) of 20.5 μC cm-2 under a low operating voltage (Vrw) of 1 V. However, upon heating to 250-400 °C, most of the o-phase transforms into an antiferroelectric tetragonal (t-) phase. Conversely, a unidirectional voltage-pulse \"wake-up\" process can potentially promote the recovery of the t-phase back to the o-phase under high-temperature conditions; as a result, at 250 °C, Pr reaches 19.3 μC cm-2 at Vrw = 1 V and 25.3 μC cm-2 at Vrw = 1.5 V, with the corresponding endurance exceeding 1010 and 109 cycles, respectively. Remarkably, most of the restored ferroelectric polarization can be well maintained even at elevated temperatures up to 350 °C. Notably, Pr remains ≥24.0 μC cm-2 at Vrw = 1.5 V across the broad temperature range of 25-250 °C, even after ten complete thermal cycling steps (25 °C → 250 °C → 25 °C). This work establishes a robust materials foundation for high-density ferroelectric memories that simultaneously achieve high-temperature operational stability, low write voltage, superior endurance, and excellent retention.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":" ","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Label-free fluorescent detection of miRNA-21 via EXPAR-triggered rolling circle amplification coupled with a dimeric/tandem G-quadruplex-thioflavin T reporter.

IF 3 3区化学

Analytical Methods Pub Date : 2026-10-20 DOI: 10.1039/d6ay01589a

Hanbo Zhang, Yuehua Yuan, Yulin Ren, Yubo Zhao, Yinxiao Qi, Feixue Feng

{"title":"Label-free fluorescent detection of miRNA-21 via EXPAR-triggered rolling circle amplification coupled with a dimeric/tandem G-quadruplex-thioflavin T reporter.","authors":"Hanbo Zhang, Yuehua Yuan, Yulin Ren, Yubo Zhao, Yinxiao Qi, Feixue Feng","doi":"10.1039/d6ay01589a","DOIUrl":"https://doi.org/10.1039/d6ay01589a","url":null,"abstract":"MicroRNA-21 is a well recognized oncogenic microRNA and is involved in the initiation and development of many cancers, making it an important candidate marker for diagnosis. In this work, a label-free fluorescent assay was designed for highly sensitive miRNA-21 detection by coupling exponential amplification reaction (EXPAR), rolling circle amplification (RCA), and dimeric G-quadruplex/thioflavin T (ThT) signal reporting. The designed asymmetric hairpin probe specifically recognizes the target and initiates the EXPAR, generating abundant trigger strands that subsequently activate RCA. The RCA products contain repeated G-rich segments encoding tandem/dimeric G4-forming motifs, which form multiple G-quadruplex units in the presence of K+. After ThT binds to these structures, a clear fluorescence output is generated. Benefiting from the effectively suppressed background leakage by the hairpin design and the significantly enhanced signal generation enabled by the EXPAR-RCA cascade, the assay exhibits excellent analytical performance. The fluorescence response shows a good linear correlation over the range of 10 fM to 10 nM, with a limit of detection (LOD) of 1.58 fM. The method also demonstrates high selectivity toward miRNA-21, capable of discriminating single-base mismatched sequences. Furthermore, analysis of diluted serum and cellular RNA samples demonstrated the preliminary applicability of the proposed strategy in biological matrices. The method provides a convenient, low-cost, and highly sensitive analytical platform for miRNA detection and bioanalytical research.","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave-assisted combinatorial synthesis of phalloidin derivatives for optimization of structure-activity-relationship (SAR). 微波辅助组合合成phalloidin衍生物的构效关系优化。

IF 4.3 2区化学

Chemical Communications Pub Date : 2026-10-20 DOI: 10.1039/d6cc05246k

Tino Damaszek, Mark A R de Geus, Zhanyu He, Guiyang Yao, Christian P R Hackenberger, Roderich D Süssmuth

引用次数: 0

Emerging therapeutic strategies for triple-negative breast cancer using ruthenium, iridium, and rhenium complexes. 使用钌、铱和铼络合物治疗三阴性乳腺癌的新策略。

IF 3.3 3区化学

Dalton Transactions Pub Date : 2026-10-20 DOI: 10.1039/d6dt01362g

Rishav Das, Priyankar Paira

引用次数: 0

Magnetic, optical, and photoelectrochemical properties of Er_0.75Y_0.25Fe_1-xCo_xO₃ (x = 0.05, 0.15, 0.3, and 0.5): a Mössbauer and X-ray photoelectron spectroscopy study.

IF 3 3区化学

Physical Chemistry Chemical Physics Pub Date : 2026-10-20 DOI: 10.1039/d6cp01367h

Laxmi Devi, Soumen Ash, Nancy, Akshay Kumar, Adarsh Kumar, Ankush Vij, Sher Singh Meena, Kaustava Bhattacharyya, Anirban Das

{"title":"Magnetic, optical, and photoelectrochemical properties of Er0.75Y0.25Fe1-xCoxO3 (x = 0.05, 0.15, 0.3, and 0.5): a Mössbauer and X-ray photoelectron spectroscopy study.","authors":"Laxmi Devi, Soumen Ash, Nancy, Akshay Kumar, Adarsh Kumar, Ankush Vij, Sher Singh Meena, Kaustava Bhattacharyya, Anirban Das","doi":"10.1039/d6cp01367h","DOIUrl":"https://doi.org/10.1039/d6cp01367h","url":null,"abstract":"Polycrystalline Er0.75Y0.25Fe1-xCoxO3 (x = 0.05, 0.15, 0.3, and 0.5) perovskites were synthesized via the solid-state reaction method, and their structural, magnetic, optical and photoelectrochemical properties were investigated. Rietveld refinement of powder X-ray diffraction data confirmed an orthorhombic perovskite phase (Pbnm) for all compositions. Magnetic studies demonstrated weak ferromagnetism governed by the interplay of Dzyaloshinskii-Moriya (DM) and superexchange interactions. Spin reorientation transitions TSR exhibited as broad temperature intervals moved to higher temperatures relative to pure ErFeO3, ranging from 104-174 K (x = 0.05), 125-178 K (x = 0.15), 228-340 K (x = 0.3), and 133-233 K (x = 0.5). X-ray photoelectron spectroscopy revealed mixed Co3+/Co4+ states along with oxygen non-stoichiometry, consistent with Mössbauer evidence of weakened Fe-O-Fe exchange interactions. Mott-Schottky measurements indicated a decrease in valence band potential (from 3.51 to 3.07 eV) along with a transition from p-n to p-type semiconducting behaviour. These results highlight a tunable system with coupled spin, structural, and electronic functionalities, making it a promising candidate for spintronic and photoelectrochemical applications.","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":" ","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulating loop flexibility reversibly switches DNA nanocage assembly.

IF 5.2 3区材料科学

Nanoscale Pub Date : 2026-10-20 DOI: 10.1039/d6nr03158g

Xiao Rong, Mengzhou Wei, Yulin Li

引用次数: 0