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Fe3+ ion quantification with reusable bioinspired nanopores

Chinese Chemical Letters 2025年第2期36卷 207-212页

作者： Yanqiong Wang Yaqi Hou Fengwei Huo Xu Hou Institute of Flexible Electronics (IFE Future Technologies) Xiang’an Campus Xiamen University State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Institute of Artificial Intelligence Xiamen University Department of Physics Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Materials Research Jiujiang Research Institute College of Physical Science and Technology Xiamen University Innovation Laboratory for sciences and Technologies of Energy Materials of fujian province (IKKEM) Engineering Research Center of Electrochemical Technologies of Ministry of Education Xiamen University

Excessive Fe3+ion concentrations in wastewater pose a long-standing threat to human *** low-cost,high-efficiency quantification of Fe3+ion concentration in unknown solutions can guide environmental management decisions and optimize water treatment *** this study,by leveraging the rapid,real-time detection capabilities of nanopores and the specific chemical binding affinity of tannic acid to Fe3+,a linear relationship between the ion current and Fe3+ion concentration was *** this linear relationship,quantification of Fe3+ion concentration in unknown solutions was ***,ethylenediaminetetraacetic acid disodium salt was employed to displace Fe3+from the nanopores,allowing them to be restored to their initial conditions and reused for Fe3+ion *** reusable bioinspired nanopores remain functional over 330 days of *** recycling capability and the long-term stability of the nanopores contribute to a significant reduction in *** study provides a strategy for the quantification of unknown Fe3+concentration using nanopores,with potential applications in environmental assessment,health monitoring,and so forth.

关键词： Bioinspired nanopores Chemical binding affinity Fe3+ ion quantification Reusability Tannic acid

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Recent Strategies and Advances in Hydrogel‑Based Delivery Platforms for Bone Regeneration

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Nano-Micro Letters 2025年第3期17卷 389-439页

作者： Xiao Wang Jia Zeng Donglin Gan Kun Ling Mingfang He Jianshu Li Yongping Lu Scientific and Technological Innovation Center for Biomedical Materials and Clinical Research Guangyuan Key Laboratory of Multifunctional Medical HydrogelGuangyuan Central HospitalGuangyuan 628000People’s Republic of China Jiangsu Collaborative Innovation Center of Biomedical Functional Materials Jiangsu Key Laboratory of Bio‑Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023People’s Republic of China College of Polymer science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065People’s Republic of China

Bioactive molecules have shown great promise for effectively regulating various bone formation processes,rendering them attractive therapeutics for bone ***,the widespread application of bioactive molecules is limited by their low accumulation and short half-lives in *** have emerged as ideal carriers to address these challenges,offering the potential to prolong retention times at lesion sites,extend half-lives in vivo and mitigate side effects,avoid burst release,and promote adsorption under physiological *** review systematically summarizes the recent advances in the development of bioactive molecule-loaded hydrogels for bone regeneration,encompassing applications in cranial defect repair,femoral defect repair,periodontal bone regeneration,and bone regeneration with underlying ***,this review discusses the current strategies aimed at improving the release profiles of bioactive molecules through stimuli-responsive delivery,carrier-assisted delivery,and sequential ***,this review elucidates the existing challenges and future directions of hydrogel encapsulated bioactive molecules in the field of bone regeneration.

关键词： Hydrogel Bone regeneration Bioactive molecules Drug delivery Nano-/microscale carriers

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Unraveling the complex interactions between plasmonic Ag nanoparticles and biomolecules for enhancing molecular chirality

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science China Chemistry 2025年第2期68卷 543-551页

作者： Chen Wang Yunlong Tao Qingqing Cheng Dandan Lu Chuang Liu Guizeng Yang Xuehao Sun Lichao Sun Qingfeng Zhang College of Chemistry and Molecular sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072China Suzhou Institute of Wuhan University Suzhou 215123China

Plasmonic nanostructures have been widely employed to enhance the chiral light-matter interactions for chirality sensing owing to their intriguing optical ***,a quantitative understanding of the correlation between enhanced molecular chirality and plasmonic properties in plasmonic nanoparticle-molecule complexes remains a challenge yet to be *** we demonstrate the complex interactions between Ag nanoparticles and biomolecules that generate distinct plasmonic circular dichroism signals ranging from UV to visible *** deliberately changing the surface coverage of chiral molecules,the geometry of Ag nanoparticles,and the aggregation states of the complexes,three distinct underlying mechanisms were found to be intertwined and hybridized for enhancing circular dichroism *** further employed the chiral plasmonic nanoparticle-molecule complexes to quantify the enantiomeric purity of cysteine and explore their possible applications in other chiral *** insights gained from this work shed light on the underlying mechanisms dictating the enhanced circular dichroism signals of chiral plasmonic nanoparticle-molecule complexes.

关键词： chiral plasmonics plasmonic circular dichroism nanoparticle-molecule complexes Ag nanoparticles chirality sensing

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Co-assembly of chiral copper(I) complexes and achiral polymer for enhanced circularly polarized luminescence

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science CHINA-CHEMISTRY 2025年第3期68卷 935-942页

作者： Liu, Ting Yu, Muxin Ye, Yangxingyu Zhao, Yunfang Li, Zhijia Wu, Zhiyuan Jiang, Feilong Chen, Lian Hong, Maochun Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Peoples R China fujian Jiangxia Univ Organ Optoelect Engn Res Ctr Fujians Univ Coll Elect & Informat Sci Fuzhou 350108 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Circularly polarized luminescence (CPL) has attracted growing attention for their promising applications in chiral functional devices. Achieving CPL materials with both high luminescence dissymmetry factors (glum) and emission efficiency is attractive but remains great challenges. In this study, a pair of chiral Cu(I) complexes named R/S-CuI with C2 symmetry were synthesized, exhibiting no emission in solution and weak CPL with glum = +/- 3.3x10-3 in crystalline state. Transparent chiral films (R/S-CuI-film) were developed through the co-assembly of R/S-CuI and achiral polymer PMMA. The films show bright green luminescence with the quantum yields about 200 times higher than those in crystalline state. Meanwhile, the maximum |glum| value is also amplified by approximately 2.5 times, reaching to 8.7x10-3. Mechanism investigation suggests that the notable enhancement of luminescence efficiency can be ascribed to the restriction of the intramolecular motions and the elimination of the oxygen quenching effect, while the improvement in glum values may be explained by the chirality transfer from the axially chiral molecule R/S-CuI to the achiral polymer PMMA. Furthermore, R/S-CuI-film were used for advanced information encryption applications based on its CPL characteristics. This work may provide new inspirations for the construction of CPL-active films with high performance, thereby expediting their further development.

关键词： metal-organic complexes circularly polarized luminescence achiral polymer chiral film chirality transfer

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A cationic radical lanthanide organic tetrahedron with remarkable coordination enhanced radical stability

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Chinese Chemical Letters 2025年第2期36卷 568-573页

作者： Zhengzhong Zhu Shaojun Hu Zhi Liu Lipeng Zhou Chongbin Tian Qingfu Sun State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of the Chinese Academy of sciences

Rare–earth supramolecular compounds, such as lanthanide organic polyhedrons（LOPs）, are of particular interest due to their many possible applications in various fields. Here we report the first syntheses of Ln4(L·+)4–type(Ln, lanthanides; L·+, radical ligand) radical–bridged lanthanide organic tetrahedrons by self–assembly of face–capping triphenylamine（TPA）–cored radical ligand with different lanthanide *** coordination enhanced radical stability has been observed, with half–life times(t1/2) for L1·+,La4(L1·+)4, Eu4(L1·+)4, Gd4(L1·+)4, Tb4(L1·+)4and Lu4(L1·+)4estimated to be 53 min, 482 min, 624 min,1248 min, 822 min and 347 min, respectively. The TPA radical in Ln4(L1·+)4containing paramagnetic Ln ions（Ln = EuⅢ, GdⅢand TbⅢ） is observed to be more stable than that in Ln4(L1·+)4（Ln = LaⅢand LuⅢ）constructed by diamagnetic Ln ions. This difference in radical stability is possibly due to the magnetic interactions between paramagnetic LnⅢions and L1·+ligands, as confirmed by electron paramagnetic resonance（EPR） in La4（L）4(L = L1and L1·+) and Tb4（L）4(L = L1and L1·+), and magnetic susceptibility measurements in Tb·4（L）4(L = L1and L1·+). Our study reveals the coordination of radical ligands with lanthanide ions can improve the radical stability, which is crucial for their applications.

关键词： Enhanced stability Lanthanide organic polyhedrons Radical Self–assembly Supramolecular chemistry

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sRNA113 regulates Pseudomonas plecoglossicida motility to affect immune response against infection in pearl gentian grouper

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ZOOLOGICAL RESEARCH 2025年第1期46卷 152-164页

作者： He, Li Mao, Mei-Qin Zhao, Ling-Min Li, Qi Ge, Hui Zhang, Jiao-Nan Zhang, Jiao-Lin Yan, Qing-Pi Jimei Univ Fisheries Coll Xiamen 361021 Fujian Peoples R China Fisheries Res Inst fujian Xiamen 361000 Fujian Peoples R China fujian Tianma Technol Co Ltd Key Lab Special Aquat Feed Fujian Fuzhou 350308 Fujian Peoples R China

Small RNAs (sRNAs) are a class of molecules capable of perceiving environmental changes and exerting post- transcriptional regulation over target gene expression, thereby influencing bacterial virulence and host immune responses. Pseudomonas plecoglossicida is a pathogenic bacterium that poses a significant threat to aquatic animal health. However, the regulatory mechanisms of sRNAs in P . plecoglossicida remain unclear. This study focused on sRNA113, previously identified as a potential regulator of the fliP gene, a key component of the lateral flagellar type III secretion system. To investigate the effects of sRNA113 on P . plecoglossicida virulence, as well as its role in regulating pathogenic processes and host immune responses, mutant strains lacking this sRNA were generated and analyzed. Deletion of sRNA113 resulted in the up-regulation of lateral flagellar type III secretion system-related genes in P . plecoglossicida, which enhanced bacterial swarming motility, biofilm formation, and chemotaxis ability in vitro. In vivo infection experiments with pearl gentian grouper revealed that sRNA113 deletion enhanced the pathogenicity of P . plecoglossicida. This heightened virulence was attributed to the up-regulation of genes associated with the lateral flagellar type III secretion system, resulting in higher bacterial loads within host tissues. This amplification of pathogenic activity intensified tissue damage, disrupted immune responses, and impaired the ability of the host to clear infection, ultimately leading to mortality. These findings underscore the critical role of sRNA113 in regulating the virulence of P . plecoglossicida and its interaction with host immune defenses. This study provides a foundation for further exploration of sRNA mediated mechanisms in bacterial pathogenesis and host- pathogen interactions, contributing to a deeper understanding of virulence regulation and immune evasion in aquatic pathogens.

关键词： Pseudomonas plecoglossicida sRNA Virulence Pearl gentian grouper Immune response

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Light-responsive nanomaterials for biofilm removal in root canal treatment

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Chinese Chemical Letters 2025年第2期36卷 38-48页

作者： Di An Mingdong She Ziyang Zhang Ting Zhang Miaomiao Xu Jinjun Shao Qian Shen Xuna Tang Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Nanjing Tech University Department of Senior Expert Diagnosis and Treatment Center Nanjing Stomatological Hospital Affiliated Hospital of Medical School Nanjing University State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM)Nanjing University of Posts and Telecommunications

Various chemical irrigants and drugs have been employed for intra-canal disinfection in root canal therapy (RCT). However, due to the complexity of root canal anatomy, many drugs still exhibit poor penetrability and antibiotic resistance, leading to suboptimal treatment outcomes. Thus, it is challenging to remove the organic biofilms from root canals. In recent years, light-responsive therapy, with deeper tissue penetration than traditional treatments, has emerged as an effective RCT modality. Herein, this review summarizes the recent development of light-responsive nanomaterials for biofilm removal in *** light-responsive nanomaterials and the corresponding therapeutic methods in RCT, including photodynamic therapy (PDT), photothermal therapy (PTT), and laser-activated therapy, are highlighted. Finally,the challenges that light-responsive nanomaterials and treatment modalities will encounter to conquer the biofilm in future RCT are discussed. This review is believed to significantly accelerate the future development of light-responsive nanomaterials for RCT from bench to bedside.

关键词： Biofilm Light-responsive nanomaterials Photodynamic therapy Photothermal therapy Root canal treatment

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Charged functional groups modified porous spherical hollow carbon material as CDI electrode for salty water desalination

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Journal of Environmental sciences 2025年第3期149卷 254-267页

作者： Yushan Ni Yunlong Pu Jie Zhang Weiyan Cui Mingjun Gao Dongjiang You School of Environmental and Material Engineering Yantai UniversityYantai 264005China

As a new electrochemical technology,capacitive deionization(CDI)has been increasingly applied in environmental water treatment and seawater *** this study,functional groups modified porous hollow carbon(HC)were synthesized as CDI electrode material for removing Na^(+)and Cl^(−)in salty *** showed that the average diameter of HC was approximately 180 nm,and the infrared spectrum showed that its surface was successfully modified with sulfonic and amino groups,*** sulfonic acid functionalized HC(HC-S)showed better electrochemical and desalting performance than the amino-functionalized HC(HC–N),with a maximum Faradic capacity of 287.4 F/g and an adsorptive capacity of 112.97 mg/g for ***,92.63%capacity retention after 100 adsorption/desorption cycles demonstrates the excellent stability of *** main findings prove that HC-S is viable as an electrodematerial for desalination by high-performance CDI applications.

关键词： Hollow carbon Functional groups Desalination Capacitive deionization

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Intermolecular reductive coupling of aliphatic ketones with alkynes and alkenes by BCN photocatalysts

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science China Chemistry 2025年第1期68卷 181-185页

作者： Yanping Xia Luyang Sun Jiajia Cheng Sibo Wang Meifang Zheng Xinchen Wang State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350116China

A photocatalytic process was developed for intermolecular reductive coupling of aliphatic ketones with alkynes/alkenes to furnish tertiary *** studies support that boron carbonitrides(BCN)promote the single electron reduction of unactivated aliphatic ketones to generate ketyl radicals with visible light irradiation,which then react with alkynes and alkenes to afford the allylic and aliphatic alcohols,*** heterogeneous photocatalytic system is compatible with diverse substrates including pharmaceutical-related molecules(43 examples)with reusability and scale-up experiments,verifying the complementary synthetic utility of this method to the homogeneous catalysts.

关键词： aliphatic ketones ketyl radical intermolecular cross-coupling tertiary alcohols

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Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu Cong Zhang Qian Chen Yiping Li Chao Lin Xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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