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Targeted alleviation of ischemic stroke reperfusion via atorvastatin-ferritin Gd-layered double hydroxide

Bioactive Materials 2023年第2期20卷 126-136页

作者： Li Wang Baorui Zhang Xueting Yang Shuaitian Guo geoffrey i.n.waterhouse Guangrong Song Shanyue Guan Aihua Liu Liang Cheng Shuyun Zhou Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Beijing neurosurgical institute and Beijing Tiantan Hospital Capital Medical UniversityChina National Clinical Research Center for Neurological DiseasesBeijing100070China institute of Functional nano&Soft Materials(FUnSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China School of Chemical Sciences The University of AucklandAuckland1142New Zealand

in acute ischemic stroke therapy,potent neuroprotective agents are needed that prevent neural injuries caused by reactive oxygen species(ROS)during ischemic ***,a novel 2D neuroprotective agent(AFGd-LDH)is reported,comprising Gd-containing layered double hydroxide nanosheets(Gd-LDH,as a drug nanocarrier/MRi contrast agent),atorvastatin(ATO,as a neuroprotective drug)and the ferritin heavy subunit(FTH,as a blood brain barrier transport agent).Experiments revealed AFGd-LDH to possess outstanding antioxidant activity,neuroprotective properties,blood‒brain barrier transit properties,and *** vitro studies demonstrated the ROS scavenging efficiency of AFGd‒LDH to be~90%,surpassing CeO_(2)(50%,a ROS scavenger)and edaravone(52%,a clinical neuroprotective drug).ischemia‒reperfusion model studies in mice showed AFGd‒LDH could dramatically decrease apoptosis induced by reperfusion,reducing the infarct area by 67%and lowering the neurological deficit score from 3.2 to ***-LDH also offered outstanding MRi performance,thus enabling simultaneous imaging and ischemia reperfusion therapy.

关键词： Layered double hydroxide ROS scavenger Atorvastatin ischemic stroke Multimodal imaging

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Cross-linking enhanced room-temperature phosphorescence of carbon dots

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SmartMat 2022年第2期3卷 337-348页

作者： Boyang Wang Zhen Sun Jingkun Yu geoffrey i.n.waterhouse Siyu Lu Bai Yang Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhouChina School of Chemical Sciences The University of AucklandAucklandNew Zealand State Key Lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunChina

Currently,there is a strong drive to discover alternative materials that exhibit room-temperature phosphorescence(RTP)for displays,bioimaging,and data ***,these materials should be nontoxic,cheap,and possess controllable photoluminescent *** dots(CDs)possess each of these characteristics,but to date,less attention has been paid to their RTP ***,we synthesized a series of CDs by self-crosslinking and carbonization of *** resultant CDs were luminescent and exhibited a bright,micro-second afterglow *** increase the RTP,a second microwave processing step was used to coat the CDs with polyvinyl alcohol(PVA),polyacrylamide(PAM),or tetraethyl orthosilicate(TEOS),producing CDs@PVA,CDs@PAM,and CDs@TEOS *** core-shell structure acted to enhance crosslinking at the surface of the CDs to boost the RTP,creating abundant energy levels for intersystem *** situ X-ray photoelectron spectroscopy verified electron transfer during ***,we present a design rule that can be used to tune the quantum yields and RTP lifetime of CDs,based on the effective stabilization of triplet excited states through the extent and strength of *** simple strategy provides a flexible route for guiding the further development of CDs with tailored RTP properties for various applications.

关键词： carbon dots crosslink-enhanced emission effect phosphorescence mechanism polymers room-temperature phosphorescence

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联吡啶嗡盐共价有机框架材料合成与选择性捕获放射性高鍀酸根

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Science Bulletin 2022年第9期67卷 924-932,M0004页

作者： Mengjie Hao Zhongshan Chen Hui Yang geoffrey i.n.waterhouse Shengqian Ma Xiangke Wang College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China MacDiarmid institute for Advanced Materials and nanotechnology School of Chemical SciencesThe University of AucklandAuckland 1142New Zealand Department of Chemistry University of North TexasDentonTX 76201USA

具有高比表面积及规则孔道结构的离子型共价有机框架(COF)材料表现出广泛的应用前景.本文设计合成了一种基于联吡啶嗡盐的阳离子型COF材料(PS-COF-1).PS-COF-1比表面积为2703 m^(2) g^(-1),高于目前报道的其他离子型COF材料.PS-COF-1具... 详细信息

具有高比表面积及规则孔道结构的离子型共价有机框架(COF)材料表现出广泛的应用前景.本文设计合成了一种基于联吡啶嗡盐的阳离子型COF材料(PS-COF-1).PS-COF-1比表面积为2703 m^(2) g^(-1),高于目前报道的其他离子型COF材料.PS-COF-1具有固定的一维通道(~4.5 nm)、良好的化学稳定性和耐辐照稳定性,表现出优异的吸附ReO_(4)^(-)(最大吸附量为1262 mg g^(-1))和^(99)TcO_(4)^(-)性能.进一步研究表明,PS-COF-1在高离子强度下表现出快速吸附动力学、高吸附容量和对^(99)TcO_(4)^(-)和ReO_(4)^(-)的高选择性,在模拟美国汉福德低活性废物流条件下成功选择性去除了^(99)TcO_(4)^(-).此外,PS-COF-1能够在10 min内将ReO_(4)^(-)和^(99)TcO_(4)^(-)污染水净化至饮用水级别.密度泛函理论计算表明,PS-COF-1对低电荷密度阴离子ReO_(4)^(-)和^(99)TcO_(4)^(-)具有强的亲和力(优于其他常见阴离子,如Cl^(-),nO_(3)^(-),SO_(4)^(2-),CO_(3)^(2-)),阐明了PS-COF-选择性吸附^(99)TcO_(4)^(-)的机理.本文展示了一种用于选择性捕获放射性核素新型阳离子COF吸附剂,为放射性污染治理提供了重要的理论依据和指导.

关键词：密度泛函理论计算电荷密度联吡啶设计合成离子强度选择性吸附辐照稳定性吸附动力学

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Aggregation in carbon dots

Aggregate

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Aggregate 2022年第6期3卷 99-112页

作者： Yi Ru geoffrey i.n.waterhouse Siyu Lu Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhouChina School of Chemical Sciences The University of AucklandAucklandNew Zealand

Carbon dots(CDs)possess outstanding luminescence properties,making them widely used in optical displays,anti-counterfeiting systems,bioimaging,and ***,there is much debate about the classification of CDs,as well as their formation process,structure,and fluorescence *** plays an important role in the formation and fluorescence(e.g.,aggregationinduced emission)of CDs,yet is seldom studied in *** review aims fill this knowledge gap,by first exploring how aggregation leads to the formation of different types of CDs(e.g.,graphene quantum dots,carbon quantum dots,and carbonized polymer dots),followed by a detailed examination of the effect of aggregation-induced morphology on the luminescence properties and application of ***,opportunities and challenges for the application of CDs in various applications are discussed,with the need for better mechanistic understanding of aggregation-induced luminescence being an imperative.

关键词： aggregation carbon dots special application special luminescence special morphology

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Converging Cooperative Functions into the nanospace of Covalent Organic Frameworks for Efficient Uranium Extraction from Seawater

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CCS Chemistry 2022年第7期4卷 2294-2307页

作者： Mengjie Hao Zhongshan Chen Xiaolu Liu Xianhai Liu Juyao Zhang Hui Yang geoffrey i.n.waterhouse Xiangke Wang Shengqian Ma College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206 MacDiarmid institute for Advanced Materials and nanotechnology School of Chemical SciencesThe University of AucklandAuckland 1142 Department of Chemistry University of North TexasDentonTX 76201

The extraction of uranium from seawater is challenging though it offers tremendous potential for the sustainable production of nuclear fuel for the energy ***,we report a new strategy for efficient extraction of uranium from seawater via converging the cooperative functions of adsorption-photocatalysis into the nanospace of covalent organic frameworks(COFs).Functionalization of the organic linkers in the multicomponent COFs allowed exploration of the relationship between material composition and adsorption-photocatalytic activity for uranium *** presence of amidoxime groups in the COFs offered selective binding sites for uranyl,whilst triazine units and bipyridine-Pd groups acted cooperatively to photocatalytically reduce adsorbed U(Ⅵ)to a U(Ⅳ)solid product(UO2)for facile *** of our developed COFs,4-Pd-AO,displayed exceptional performance in sequestering and reducing uranyl from natural seawater,with a high extraction capacity of 4.62 mg U/g per day(average data)under visible light *** studies revealed that 4-Pd-AO not only reduced adsorbed uranyl(Ⅵ)to U(Ⅳ)O_(2),but also generated ^(1)O_(2) and superoxide radicals under visible light excitation,thus affording excellent antibacterial and antialgal activities(i.e.,antibiofouling properties)for sustained efficient uranium extraction *** proof-ofconcept study establishes multicomponent COFs as promising candidates for efficient uranium extraction from seawater.

关键词： covalentor ganic frameworks seawater uraniumextraction adsorption-photocatalysis cooperativity

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Large-scale synthesis of n-doped carbon capsules supporting atomically dispersed iron for efficient oxygen reduction reaction electrocatalysis

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eScience 2022年第2期2卷 227-234页

作者： Hui Yang Yanfang Liu Xiaolu Liu Xiangke Wang He Tian geoffrey i.n.waterhouse Paul E.Krugere Shane GTelfer Shengqian Ma Department of Chemistry University of North TexasDentonTX76201United States College of Environmental Science and Engineering North China Electric Power UniversityBeijing102206PR China State Key Laboratory of Silicon Materials Center of Electron MicroscopySchool of Materials Science and EngineeringZhejiang UniversityHangzhou310027PR China MacDiarmid institute for Advanced Materials and nanotechnology School of Chemical SciencesThe University of AucklandAuckland1142New Zealand MacDiarmid institute for Advanced Materials and nanotechnology School of Physical and Chemical SciencesUniversity of CanterburyChristchurch8140New Zealand MacDiarmid institute for Advanced Materials and nanotechnology School of Fundamental SciencesMassey UniversityPalmerston North4442New Zealand

The large-scale synthesis of platinum-free electrocatalysts for the oxygen reduction reaction(ORR)remains a grand *** report the large-scale production of stable and active ORR electrocatalysts based on iron,an earth-abundant element.A core–shell zeolitic imidazolate framework–tannic acid coordination polymer composite(ZiF-8@K-TA)was utilized as the catalyst precursor,which was transformed into iron atoms dispersed in hollow porous nitrogen-doped carbon capsules(H-Fe-n_(x)-C)through ion exchange and pyrolysis.H-Fe-n_(x)-C fea-tures site-isolated single-atom iron centers coordinated to nitrogen in graphitic layers,high levels of nitrogen doping,and high permeability to incoming *** from these characteristics,H-Fe-n_(x)-C demonstrated efficient electrocatalytic activity(E_(1/2)=0.92 V,***)and stability towards the ORR in both alkaline and acidic *** ORR performance,it surpassed the majority of recently reported Fe-n-C catalysts and the standard Pt/C *** addition,H-Fe-n_(x)-C showed outstanding tolerance to methanol.

关键词： Metal single atoms Hollow carbon capsules Oxygen reduction reaction Metal–organic framework Electrocatalysis

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非共轭分子衍生的红色发射碳点的光致发光机制探究

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Science Bulletin 2022年第14期67卷 1450-1457,M0004页

作者：杨鑫艾琳于镜坤 geoffrey i.n.waterhouse 隋来志丁洁张保卫雍雪卢思宇 These authors contributed equally to this work.a.Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450000China School of Chemical Sciences The University of AucklandAuckland 1142New Zealand State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of Chemistry University of SheffieldSheffield S37HFUK

在碳点基发光材料中,红光和近红外波长发射性质的开发一直是目前研究的热点和难点,其在生物学领域和显示领域等具有广阔的应用前景;然而,红光碳点的形成过程和荧光机理均不明确,这使得高品质红光碳点的制备依然面临巨大挑战.针对上述难... 详细信息

在碳点基发光材料中,红光和近红外波长发射性质的开发一直是目前研究的热点和难点,其在生物学领域和显示领域等具有广阔的应用前景;然而,红光碳点的形成过程和荧光机理均不明确,这使得高品质红光碳点的制备依然面临巨大挑战.针对上述难题,作者提出氮(n)诱导芳构化的策略,精准调控碳点中五元芳环和六元芳环的形成过程,并通过高分辨制质谱结合密度泛函理论计算深度解析了柠檬酸基红光碳点的荧光发射中心.作者选取柠檬酸和一系列类柠檬酸分子,如乌头酸、酒石酸、天冬氨酸、苹果酸和顺丁烯二酸等作为反应前驱体进行探究,结果表明,柠檬酸类似物种碳链长度的不同会影响所制备碳点的荧光发射波长,前体碳链长度会影响n参与的扣环形式,从而导致不同程度的红移.其中,柠檬酸基碳点可形成n掺杂六元芳环,从而实现荧光发射波长从无n掺杂的423 nm到有n掺杂的667 nm,高达244 nm的大幅度红移.本工作揭示了柠檬酸或类柠檬酸等非共轭小分子为碳源制备红光碳点的生长过程和其荧光发射中心,并为其他类型碳点的荧光机制探索和结构分析提供了创新思路.

关键词：碳链长度密度泛函理论计算顺丁烯二酸光致发光共轭分子荧光发射创新思路发光材料

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Fermentation-enabled wellness foods:A fresh perspective

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Food Science and Human Wellness 2019年第3期8卷 203-243页

作者： Huan Xiang Dongxiao Sun-waterhouse geoffrey i.n.waterhouse Chun Cui Zheng Ruan South China University of Technology GuangzhouChina School of Chemical Sciences The University of AucklandPrivate Bag 92019AucklandNew Zealand

Fermented foods represent an important segment of current food markets,especially traditional or ethnic food *** demand for efficient utilization of agrowastes,together with advancements in fermentation technologies(microbial-and enzyme-based processing),are stimulating rapid growth and innovation in the fermented food *** addition,the health-promoting benefits of fermented foods are attracting increasingly *** microorganisms contained in many common fermented foods can serve as“microfactories”to generate nutrients and bioactives with specific nutritional and health ***,recent research relating to the manufacture of fermented foods are critically reviewed,placing emphasis on the potential health benefits of fermentation-enabled wellness *** importance of the correct selection of microorganisms and raw materials and the need for precise control of fermentation processes are *** knowledge gaps and obstacles to fermented food production and market penetration are *** importance of integrating multidisciplinary knowledge,communicating with consumers,establishing regulatory frameworks specifically for fermentation-enabled wellness foods and functional fermented foods,are highlighted.

关键词： Fermented foods Microbial factories Bioactive Probiotics nutrients Processing technologies

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Towards human well-being through proper chewing and safe swallowing:multidisciplinary empowerment of food design

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Journal of Future Foods 2021年第1期1卷 1-24页

作者： Dongxiao Sun-waterhouse Wenyi Kang Changyang Ma geoffrey i.n.waterhouse national R&D Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China School of Chemical Sciences The University of AucklandPrivate Bag 92019AucklandNew Zealand

This review article provides an overview of the physiology and biomechanics of food oral processing,with a wider view towards the development of wellness foods that facilitate proper chewing and safe *** complexity of food oral processing is well recognized,involving food-mouth-gut-brain *** process requires precise coordination of chewing,oro-sensing,neural control,saliva secretion,bolus formation,swallowing and respiration,involving central and peripheral nervous systems,sensors and muscles of the oral cavity,pharynx,larynx and *** processing of an ingested food leads to its fragmentation,hydration,breakdown,transformation and reconstruction,and provides simultaneous oro-sensory perception and preliminary food digestion via mechanical fracture and chemical/enzymatic *** exists a complex food structure-property-processing relationship from the first bite of a food through to bolus formation for *** maximal deformability of a bolus is a key criterion for successful swallow-aided food *** structure is the main variable affecting food breakdown,food sensory perception and bolus *** research is needed to better understand the food structure-oral processing relationship,which guides the tailoring of foods/diets for individuals with chewing and swallowing difficulties to achieve balanced nutrition and an enjoyable eating experience.

关键词： Chewing Swallowing Food structure nutrition Health Eating experience

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Fe-n-C氧还原电催化剂中Fen_(4)位点微观环境的调节

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Science Bulletin 2022年第12期67卷 1264-1273,M0004页

作者：王青陆瑞虎杨予琪李玄泽陈广波尚露彭力山 Dongxiao Sun-waterhouse Bruce C.C.Cowie 孟祥敏赵焱张铁锐 geoffrey i.n.waterhouse School of Chemical Sciences The University of AucklandAuckland 1142New Zealand State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China iHuman institute ShanghaiTech UniversityShanghai 201210China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Australian Synchrotron 800 Blackburn Rd.ClaytonVictoria 3168Australia

Fe-n-C电催化剂,即Fen_(4)单原子位点负载于氮掺杂的碳载体上,是一种优良的氧还原催化剂,有望取代贵金属铂催化剂,应用于金属空气电池和燃料电池.目前,提高Fe-n-C材料氧还原性能的策略包括:(1)提高铁单原子活性位点的数目;(2)调节铁单... 详细信息

Fe-n-C电催化剂,即Fen_(4)单原子位点负载于氮掺杂的碳载体上,是一种优良的氧还原催化剂,有望取代贵金属铂催化剂,应用于金属空气电池和燃料电池.目前,提高Fe-n-C材料氧还原性能的策略包括:(1)提高铁单原子活性位点的数目;(2)调节铁单原子中心与含氧中间体的吸附能,从而提高本征活性.该工作报道了一种简单naCl熔盐煅烧Fe掺杂金属有机配合物前驱体(Fe-ZiF)的方法,可有效提高煅烧产物Fe-n-C催化剂中Fen_(4)单原子位点数量和本征活性.原位透射电子显微镜(TEM)实验结果表明:在高温煅烧过程中,naCl蒸发后沉积附着在Fe-ZiF颗粒表面,加速Fe-ZiF中配体的分解和锌中心的挥发,从而使煅烧产物中碳载体呈多孔结构,并改变Fe单原子位点的配位环境.X射线吸收谱进一步表明,该Fe-n-C催化剂中Fe单原子位点的Fe-n键变长,Fe的氧化态降低,从而有利于氧还原反应中间体的脱附.因此,针对碱性氧还原反应过程,该催化剂表现出比商业化铂碳催化剂更优异的性能,并可作为锌空气电池阴极催化剂,用于手机充电.

关键词： Fe-n-C Microenvironment Optimized Fen_4 site Oxygen reduction reaction Zinc-air battery

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