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Boosted solar water oxidation steered by atomically precise alloy nanocluster

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Chinese Chemical Letters 2025年第1期36卷 349-354页

作者： Xian Yan Huawei Xie Gao Wu Fang-Xing Xiao College of Materials Science and Engineering Fuzhou University(New Campus)Minhou 350108China department of forensic Science The Engineering Research CenterFujian Police CollegeFuzhou 350002China State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Atomically precise metal nanoclusters(NCs)have been deemed as a new generation of metal nanomaterials in the field of solar energy conversion due to their unique atomic stacking manner,quantum confinement effects,light-harvesting capability and multitude of active ***,wide-spread application of monometallic NCs is blocked by the ultrashort carrier lifespan,uncontrollable charge transport pathway,and light-induced poor stability,impeding the construction of robust and stable metal NC-based ***,we report the fabrication of stable alloy(Au_(1-x)Pt_(x))NCs photosystem,for which tailor-made negatively charged l-glutathione(GSH)-capped Au_(1-x)Pt_(x)NCs as the building blocks are controllably deposited on the Bi VO_(4)(BVO)by a self-assembly approach for steering enhanced light absorption and interfacial charge transfer over alloy NCs-based photoanodes(Au_(1-x)Pt_(x)/BVO).The self-assembled Au_(1-x)Pt_(x)/BVO composite photoanode exhibits the significantly enhanced photoelectrochemical water oxidation performances compared with pristine BVO and Au_(x)/BVO photoanodes,which is caused by the Pt atom doping into the Au_(x)NCs for elevating photosensitivity and boosting the *** synergy of Au and Pt atoms in alloy NCs protects the gold core from rapid oxidation,improving the photostability and accelerating the surface charge transfer *** work would significantly inspire ongoing interest in unlocking the charge transport characteristics of atomically precise alloy NCs for solar energy conversion.

关键词： Alloy nanoclusters Self-assembly Charge transport Photoanodes Photoelectrochemical water oxidation

Direct and rapid detection of serum amino acid and monoamine neurotransmitters to assist the diagnosis of panic disorder

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Science China chemistry 2025年第1期68卷 377-384页

作者： Shiwen Liu Xuerui Wan Meng Zhao Jiaqi Wang Weilan Wu Linlin You Yonggui Yuan Qian Xu Rong Gao Key Laboratory of Environmental Medicine Engineering Ministry of EducationSchool of Public HealthSoutheast UniversityNanjing 210009China Key Laboratory of Modern toxicology of Ministry of Education Department of Hygienic Analysis and DetectionSchool of Public HealthNanjing Medical UniversityNanjing 211166China department of Psychosomatics and Psychiatry Zhongda HospitalSchool of MedicineSoutheast UniversityNanjing 210009China

The measurement of amino acid and monoamine neurotransmitters(NTs)in serum plays a central role in the identification and monitoring of clinical panic disorder(PD).However,the strong polarity and chemical heterogeneity of NTs make direct extraction and rapid detection extremely ***,we developed a strategy that integrated solid phase extraction based on magnetic Fe_(3)O_(4)coated with polydopamine(Fe_(3)O_(4)@PDA)and direct analysis of mass spectrometry in real time(DART-MS)for quantification of 10 *** systematically investigated the optimal conditions of this strategy to achieve good accuracy and *** with existing magnetic solid phase extraction methods for NTs detection in biological samples,this strategy could adsorb more targets while having similar adsorption efficiencies,and the total process time was reduced by an average of 69.42%.We rapidly determined the metabolic abnormality of 6 types of NTs in the serum of PD patients and demonstrated their diagnostic *** addition,an outstanding feature of PD in which tryptophan was more metabolized by the KYN pathway and the 5-hydroxytryptamine pathway was inhibited could be elucidated by this *** results highlighted the potential ability of Fe_(3)O_(4)@PDA coupled with DART-MS to assist in the clinical diagnosis of PD.

关键词： neurotransmitters panic disorder magnetic solid phase extraction direct analysis of mass spectrometry in real time

Cerbera odollam fruit extracts enhance anti-cancer activity of sorafenib in HCT116 and HepG2 cells

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Chinese Herbal Medicines 2025年第1期17卷 108-126页

作者： Supawadee Parhira Orakot Simanurak Khemmachat Pansooksan Julintorn Somran Apirath Wangteeraprasert Zhihong Jiang Liping Bai Pranee Nangngam Dumrongsak Pekthong Piyarat Srisawang department of Pharmaceutical Technology Faculty of Pharmaceutical Sciences Naresuan University Center of Excellence for Innovation in chemistry Naresuan University Center of Excellence for Environmental Health and toxicology Faculty of Pharmaceutical Sciences Naresuan University department of Physiology Faculty of Medical Science Naresuan University department of Pharmaceutical chemistry and Pharmacognosy Faculty of Pharmaceutical Sciences Naresuan University department of Pathology Faculty of Medicine Naresuan University department of Medicine Faculty of Medicine Naresuan University State Key Laboratory of Quality Research in Chinese Medicine Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious Disease Macau Institute for Applied Research in Medicine and Health Macau University of Science and Technology department of Biology Faculty of Science Naresuan University department of Pharmacy Practice Faculty of Pharmaceutical Sciences Naresuan University Center of Excellence in Medical Biotechnology Faculty of Medical Science Naresuan University

Objective:While higher therapeutic doses of toxic cardiac glycosides derived from Cerbera odollam are frequently employed in cases of suicide or homicide,ongoing research is investigating the potential anticancer properties of low-concentration extracts obtained from the fruits of *** present study aimed to determine the enhanced anticancer effects and minimize potential side effects of combining extracts from *** fruits from Thailand with sorafenib against HCT116 and HepG2 ***:The dried powder of fresh green fruits of *** was fractionated,and its phytochemical contents,including total cardiac glycosides,phenolics,flavonoids,and triterpenoids,were *** cytotoxic effects of these fractions were evaluated against HCT116 and HepG2 cells using the MTT *** fractions showing the most significant response in HCT116 and HepG2 cells were subsequently combined with sorafenib to examine their synergistic *** induction,cell cycle progression,and mitochondrial membrane potential（MMP） were then *** underlying mechanism of the apoptotic effect was further investigated by analyzing reactive oxygen species（ROS） generation and the expression levels of antioxidant ***:Phytochemical analysis showed that ***-ethyl acetate fraction（COEtOAc） was rich in cardiac glycosides,phenolics,and flavonoids,while the dichloromethane fraction（CODCM） contained high levels of triterpenoids and *** 24 h treatment,HCT116 showed the most significant response to COEtOAc,while HepG2 responded well to CODCM with IC50values of（42.04±16.94） μg/mL and（123.75±14.21） μg/m L,***,COEtOAc（20 μg/mL） or CODCM（30 μg/mL）,both administered at sub-IC50concentrations,were combined with sorafenib at 6 μmol/L for HCT116 cells and2 μmol/L for HepG2 cells,incubated for 24 *** combination resulted in a significant suppression in cell viability by approximately 50%.The combination of treatments marked

关键词： apoptosis Cerbera odollam Gaertn. HCT116 HepG2 reactive oxygen species sorafenib

Current status of hair analysis in forensic toxicology in China

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forensic Sciences Research 2021年第4期6卷 240-249页

作者： Hui Yan Ping Xiang Min Shen department of forensic toxicology academy of Forensic scienceshanghai Key Laboratory of Forensic Medicineshanghaichina

Hair analysis has been mainly used to document drug use history in abusers,drug-facilitated crime cases,doping control analysis and postmortem toxicology in the fields of forensic toxicology,clinical toxicology,and doping *** analysis has also gained more attention in the last 30 years in *** technology has been promoted as more research has appeared concerning hair analysis,and consensus has been sought among forensic toxicologists regarding aspects such as hair decontamination treatment,detection of abused substances in hair,segmental hair analysis and interpretation of analytical ***,there are still some limitations in the estimation of drug intake time and frequency by segmental hair analysis due to the different growth cycles evident within a bundle of hairs,the drug incorporation mechanism and sampling *** and imaging mass spectrometry(iMS)technology based on a single hair may be a good choice to estimate drug intake time more *** of hair root samples may also be used to document acute poisoning in postmortem toxicology,and the analysis of the hair shaft can document long-term use of drugs depending on the length of the hair being evaluated.

关键词： forensic sciences forensic toxicology hair analysis black hair drug abuse microsampling imaging mass spectrometry

A Comparative Study on the Corrosion Performance of Ni_(47)Ti_(49)Co_4 and Ni_(51)Ti_(49) Shape Memory Alloys in Simulated Saliva Solution for Dental Applications

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Acta Metallurgica Sinica(English Letters) 2016年第11期29卷 1001-1010页

作者： Rasha A.Ahmed chemistry department Faculty of Science Taif University forensic chemistry Laboratories Medico Legal DepartmentMinistry of Justice

In this study, the corrosion behavior of Ni47Ti49Co4 shape memory alloy（SMA） was investigated in simulated saliva solution with the binary alloy Ni（51）Ti49 as a reference. The surface morphology and the chemical composition of the oxide films were characterized by scanning electron microscopy and X-ray photoelectron spectroscopy before and after immersion in the test solutions, respectively. The results showed that the ternary alloy was less affected by the test solution,owning to the formation of passive layer composed mainly of the oxides of titanium and cobalt in several oxidation *** voltammetry, electrochemical impedance spectroscopy and potentiodynamic polarization measurements affirmed that the passive oxide film significantly improved the corrosion resistance of Ni47Ti49Co4 SMAs as demonstrated by the smaller corrosion current density, larger resistance and smaller capacitance. Consequently, alloying with cobalt, which has paramount importance in enhancing the passive layer, expands the use of Ni47Ti49Co4 SMAs in dental work as new nitinol alloys with high corrosion resistances.

关键词： Ni47Ti49Co4 Shape memory alloy (SMA) Corrosion Artificial saliva X-ray photoelectronspectroscopy (XPS)

Impact of smoking cannabidiol (CBD)-rich marijuana on driving ability

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forensic Sciences Research 2021年第4期6卷 195-207页

作者： Tim J.Gelmi Wolfgang Weinmann Matthias Pfäffli department of forensic toxicology and chemistry institute of Forensic MedicineUniversity of BernBernswitzerland Graduate school for cellular and Biomedical sciences(GcB) University of BernBernswitzerland department of Traffic sciences institute of Forensic MedicineUniversity of BernBernswitzerland

To investigate effects of smoking cannabidiol(CBD)-rich marijuana on driving ability and determine free CBD andΔ9-tetrahydrocannabinol(THC)concentrations in capillary blood samples,a randomised,double-blind,placebo-controlled,two-way crossover pilot study was conducted with 33 *** smoked a joint containing 500 mg of tobacco and either 500 mg of CBD-rich marijuana(16.6%total CBD;0.9%total THC)or 500 mg of a placebo substance,then performed three different dimensions of the Vienna Test System TRAFFIC examining reaction time,behaviour under stress,and concentration *** further assessment of participants’fitness to drive,three tests of balance and coordination were evaluated and vital signs(blood pressure and pulse)were *** blood spot samples of capillary blood were taken after smoking and after completion of the tests to determine the cannabinoid concentrations(CBD,THC and THC-metabolites).The results revealed no significant differences between the effects of smoking CBD-rich marijuana and placebo on reaction time,motor time,behaviour under stress,or concentration *** free CBD and THC concentrations in capillary blood were detected shortly after smoking,ranging between 2.6-440.0 ng/mL and 6.7-102.0 ng/mL,*** 45 min,capillary blood concentrations had already declined and were in the range of 1.9-135.0 ng/mL(free CBD)and 0.9-38.0 ng/mL(free THC).Although the observed levels of free THC concentrations have been reported to cause symptoms of impairment in previous studies in which THC-rich marijuana was smoked,no signs of impairment were found in the current *** finding suggests that higher CBD concentrations cause a negative allosteric effect in the endocannabinoid system,preventing the formation of such ***,it is recommended that consumers refrain from driving for several hours after smoking CBD-rich marijuana,as legal THC concentration limits may be exceeded.

关键词： forensic sciences forensic toxicology cannabidiol driving while impaired road safety driving assessment

Segmental hair analysis for flunitrazepam and 7-aminoflunitrazepam in users:a comparison to existing literature

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forensic Sciences Research 2022年第2期7卷 299-307页

作者： Yue Zhuo Ping Xiang Jingjie Wu Xin Wang department of forensic Medicine Guizhou Medical UniversityGuiyangChina department of forensic toxicology Academy of Forensic ScienceShanghai Key Laboratory of Forensic MedicineShanghaiChina Institute of forensic Medicine Guizhou Police CollegeGuiyangChina

The availability of more quantitative data on flunitrazepam(FLU)and 7-aminoflunitrazepam(7AF)would aid in obtaining a better understanding of the interpretation of FLU concentrations in human *** purpose of this study was to provide concentrations of FLU and 7AF in hair segments of 22 FLU *** data regarding hair concentrations of FLU and 7AF from various types of cases were also reviewed to give a comprehensive overview of the comparability of different *** to six 1 cm segments of scalp hair from 22 FLU users were analyzed by a liquid chromatography–tandem mass spectrometry(LC–MS/MS)*** and its metabolite were confirmed in the hair segments from all *** of FLU and 7AF in the segments ranged from 0.01–0.16 ng/mg(median of 0.03)and 0.01–0.34 ng/mg(median of 0.09),*** cases had FLU and 7AF distributions along the hair segments that were suggestive of repeated drug use.A summary of the published concentrations gives valuable data and can assist forensic investigators in their estimations of drug use history and patterns.

关键词： forensic sciences forensic toxicology segmental hair analysis flunitrazepam 7-aminoflunitrazepam liquid chromatography-tandem mass spectrometry

Quantitative Structure-retention Relationship Study on the GC-MS Retention Time of Illicit Drugs

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Chinese Journal of Structural chemistry 2010年第12期29卷 1879-1885页

作者：夏彬彬王彦吉杨瑞琴张晓昀 department of forensic Science Chinese People's PublicSecurity University department of chemistry Lanzhou University

A quantitative structure-retention relationship（QSRR） study has been carried out on the gas chromatograph-mass spectrometry（GC-MS） system retention time（RT） of two sets of illicit drugs by using molecular structural *** method（HM） was utilized to construct the linear *** models with low standard errors and high correlation coefficients were obtained（R2=0.9873,F=390.18 for data set 1 and R2=0.9881,F=749.13 for data set 2）.The results of leave-one-out cross validation showed good predictive ability of these proposed models（R c2v= 0.9812 and R c2v= 0.9824,respectively）.Each molecular descriptor in the two models was disputed to unfold the relationship between the molecular structures and RT.

关键词： QSRR GC-MS heuristic method illicit drugs retention time

Methylated and thiolated arsenic species for environmental and health research——A review on synthesis and characterization

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Journal of Environmental Sciences 2016年第11期28卷 7-27页

作者： William R.Cullen Qingqing Liu Xiufen Lu Anthony McKnight-Whitford Hanyong Peng Aleksandra Popowich Xiaowen Yan Qi Zhang Michael Fricke Hongsui Sun X.Chris Le department of chemistry University of British Columbia Division of Analytical and Environmental toxicology Department of Laboratory Medicine and Pathology University of Alberta department of chemistry University of Alberta

Hundreds of millions of people around the world are exposed to elevated concentrations of inorganic and organic arsenic compounds, increasing the risk of a wide range of health effects. Studies of the environmental fate and human health effects of arsenic require authentic arsenic compounds. We summarize here the synthesis and characterization of more than a dozen methylated and thiolated arsenic compounds that are not commercially available. We discuss the methods of synthesis for the following14 trivalent（Ⅲ） and pentavalent（） arsenic compounds： monomethylarsonous acid（MMA~Ⅲ）, dicysteinylmethyldithioarsenite（MMA~Ⅲ（Cys）_2）, monomethylarsonic acid（MMA~Ⅴ）,monomethylmonothioarsonic acid（MMMTAⅤ） or monothio-MMA~Ⅴ, monomethyldithioarsonic acid（MMDTA~Ⅴ） or dithio-MMA~Ⅴ, monomethyltrithioarsonate（MMTTA~Ⅴ） or trithio-MMA~Ⅴ,dimethylarsinous acid（DMA~Ⅲ）, dimethylarsino-glutathione（DMA~Ⅲ（SG））, dimethylarsinic acid（DMA~Ⅴ）, dimethylmonothioarsinic acid（DMMTA~Ⅴ） or monothio-DMAⅤ, dimethyldithioarsinic acid（DMDTA~Ⅴ） or dithio-DMA~Ⅴ, trimethylarsine oxide（TMAO~Ⅴ）, arsenobetaine（AsB）, and an arsenicin-A model compound. We have reviewed and compared the available methods,synthesized the arsenic compounds in our laboratories, and provided characterization information. On the basis of reaction yield, ease of synthesis and purification of product, safety considerations, and our experience, we recommend a method for the synthesis of each of these arsenic compounds.

关键词： Arsenic standards Speciation analysis Arsenic metabolites Sulphur-containing arsenic species Synthetic chemistry of arsenic Pentavalent and trivalent methylarsenicals