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Chinese chemical Letters 2024年第5期35卷 161-165页

作者： Hang Chen chengzhi Cui Hebo Ye Hanxun Zou Lei You College of Environmental and Biological engineering Fujian Provincial Key Laboratory of Ecology-Toxicological Effects&Control for Emerging ContaminantsPutian UniversityPutian 351100China State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of chemistry and Material Science Fujian Normal UniversityFuzhou 350007China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Imine bonds are among the most explored building motifs in dynamic chemistry,polymers,and materials,and yet,their acid-resistance remains a longstanding *** we demonstrate a concept of internal protecting groups for improving the kinetic stability of dynamic imine bonds and *** examination of structure-reactivity relationship of a series of aldehydes/imines bearing a neighboring carboxyl allowed uncovering of required structural features for dynamically masking imine bonds with cyclic *** studies indicated that noncovalent interactions along with sterics control the ringchain equilibrium and the stability of imine *** incorporation of internal protecting groups into imine polymers further enabled their controlled stability in acidic ***,a combination of dynamic covalent network and coordination supramolecular network provided a facile means for the modulation of luminescent and mechanical properties of *** strategies and results reported should be beneficial to molecular assemblies,dynamic polymers,biological delivery,and intelligent materials.

关键词： Dynamic covalent chemistry Internal protecting group Kinetic stability Imine bond Dynamic polymer

Constructing a stable interface on Ni-rich LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode via lactic acid-assisted engineering strategy

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Journal of Energy chemistry 2024年第3期90卷 412-422,I0010页

作者： Weijian Tang chengzhi Hu AFei Li Xiaoqin Huang Zhangxian Chen Jianhui Su Weixin Zhang Institute of Energy Hefei Comprehensive National Science CenterHefei 230031AnhuiChina School of chemistry and chemical engineering Hefei University of Technology and Anhui Key Laboratory of Controllable Chemical Reaction&Material Chemical EngineeringHefei 230009AnhuiChina School of Electrical engineering and Automation Hefei University of TechnologyHefei 230009AnhuiChina

Ni-rich layered oxides are potential cathode materials for next-generation high energy density Li-ion batteries due to their high capacity and low ***,the inherently unstable surface properties,including high levels of residual Li compounds,dissolution of transition metal cations,and parasitic side reactions,have not been effectively addressed,leading to significant degradation in their electrochemical *** this study,we propose a simple and effective lactic acid-assisted interface engineering strategy to regulate the surface chemistry and properties of Ni-rich LiNi_(0.8)Co_(0.1)Mr_(0.1)O_(2) *** novel surface treatment method successfully eliminates surface residual Li compounds,inhibits structural collapse,and mitigates cathode-electrolyte interface film *** a result,the lactic acidtreated LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) achieved a remarkable capacity retention of 91.7% after 100 cycles at 0.5 C(25℃) and outstanding rate capability of 149.5 mA h g^(-1) at 10 C,significantly outperforming the pristine ***,a pouch-type full cell incorporating the modified LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode demonstrates impressive long-term cycle life,retaining 81.5% of its capacity after 500 cycles at 1 *** importantly,the thermal stability of the modified cathode is also dramatically *** study offers a valuable surface modification strategy for enhancing the overall performance of Ni-rich cathode materials.

关键词： Residual Li Lactic acid Surface modification Carbon coating Layered cathode Ni-rich

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有机荧光染料在生物医学成像中的应用研究

化工管理 2024年第22期 97-99页

作者：袁诚挚华中科技大学化学与化工学院化学系湖北武汉430074

生物医学成像在疾病诊断和治疗中起着关键作用。荧光成像作为一种非侵入性、高分辨率的成像技术,被广泛应用于生物医学研究中。文章旨在探讨荧光强度、染料分布和光谱特性对荧光成像效果的影响,以优化生物医学成像的灵敏度和准确性。文... 详细信息

生物医学成像在疾病诊断和治疗中起着关键作用。荧光成像作为一种非侵入性、高分辨率的成像技术,被广泛应用于生物医学研究中。文章旨在探讨荧光强度、染料分布和光谱特性对荧光成像效果的影响,以优化生物医学成像的灵敏度和准确性。文章选择不同荧光染料进行实验,并分析其荧光强度、分布情况和光谱特性。结果表明,荧光强度直接影响成像图像的亮度和对比度,而染料在生物样本中的分布均匀性和特异性结合能力也对成像结果产生重要影响。此外,不同染料的光谱特性决定了其在特定波段内的成像效果。综合考虑荧光强度、染料分布和光谱特性等因素,可以优化染料的性能,提高生物医学成像的灵敏度和准确性。由此可见,在开展生物医学成像研究中,需要综合考虑染料的荧光强度、分布情况和光谱特性等因素,以优化染料的性能,并提高成像的灵敏度和准确性。文章为有机荧光染料在生物医学成像中的高精度应用提供了参考。

关键词：生物医学成像荧光强度染料分布光谱特性灵敏度准确性

Arsenic species in electronic cigarettes:Determination and potential health risk

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Journal of Environmental Sciences 2020年第5期32卷 168-176页

作者： Qingqing Liu chengzhi Huang XChris Le Chongqing Key Laboratory of Biomedical Analysis(Southwest University) Chongqing Science&Technology CommissionCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China College of Resources and Environment Southwest UniversityChongqing400715China Key Laboratory of Luminescent and Real-Time Analytical System Chongqing Science and Technology BureauCollege of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China Department of Laboratory Medicine and Pathology Faculty of Medicine and DentistryUniversity of Alberta10102 Clinical Sciences BuildingEdmontonAlberta T6G 2G3Canada

Human exposure to contaminants from electronic cigarettes(e-cigarettes)and the associated health effects are poorly *** has been no report on the speciation of arsenic in e-liquid(solution used for e-cigarettes)and *** report here determination of arsenic species in e-liquids and aerosols generated from vaping the *** e-liquid samples of major brands,purchased from local and online stores in Canada and China,were analyzed for arsenic species using high-performance liquid chromatography and inductively coupled plasma mass *** condensed from vaping the eliquids were also analyzed and compared for arsenic *** arsenic species were detected,including inorganic arsenate(iAsⅤ),arsenite(iAsⅢ),monomethylarsonic acid(MMA),and three new arsenic species not reported *** e-liquids,iAsⅢwas detected in 59%,iAsⅤin 94%,and MMA in 47%of the *** the condensate of aerosols from vaping the e-liquids,iAsⅢwas detected in 100%,iAsv in 88%,and MMA in 13%of the *** arsenic species were predominant in e-liquids and aerosols of *** concentration of iAsⅢin the condensate of aerosols(median 3.27μg/kg)was significantly higher than that in the e-liquid(median 1.08μg/kg)*** concentration of inorganic arsenic in the vaping air was approximately 3.4μg/m3,which approaches to the permissible exposure limit(10μg/m3)set by the United States Occupational Safety and Health Administration(OSHA).According to the Environmental Protection Agency’s unit risk factor(4.3×10-3 perμg/m3)for inhalation exposure to inorganic arsenic in the air,the estimated excess lung cancer risk from lifetime exposure to inorganic arsenic in the ecigarette vaping air(3.4μg/m3),assuming e-cigarette vaping at 1%of the time,is as high as1.5×*** results raise health concerns over the exposure to arsenic from electronic cigarettes.

关键词： Electronic cigarettes E-liquid E-cigarette aerosol Arsenic speciation Inhalation exposure Metals Lung cancer risk

Current diagnostic and therapeutic strategies for COVID-19

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Journal of Pharmaceutical Analysis 2021年第2期11卷 129-137页

作者： Binbin Chen Mengli Liu chengzhi Huang College of chemistry and chemical engineering Southwest UniversityChongqing400715China School of chemistry&Molecular engineering East China University of Science and TechnologyShanghai200237China Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationSouthwest UniversityChongqing400715China Key Laboratory of Luminescence and Real-Time Analytical System Chongqing Science and Technology BureauCollege of Pharmaceutical ScienceSouthwest UniversityChongqing400715China

The outbreak and spread of novel coronavirus disease 2019(COVID-19) with pandemic features, which is caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2), have greatly threatened global public health. Given the perniciousness of COVID-19 pandemic, acquiring a deeper understanding of this viral illness is critical for the development of new vaccines and therapeutic options. In this review, we introduce the systematic evolution of coronaviruses and the structural characteristics of SARS-CoV-2. We also summarize the current diagnostic tools and therapeutic strategies for COVID-19.

关键词： Diagnosis Treatment COVID-19 Coronavirus SARS-CoV-2

Single scattering particles based analytical techniques

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Chinese Science Bulletin 2013年第18期58卷 1969-1979页

作者： LIU Yue HUANG chengzhi Education Ministry Key Laboratory on Luminescence and Real-Time Analysis School of Chemistry and Chemical EngineeringSouthwest University College of Pharmaceutical Science Southwest University

Single scattering particles,especially noble metal(plasmonic) nanoparticles,based analytical techniques are attractive recently and becoming the research focus of the light scattering analytical *** this mini review,we summarize the single scattering particles based analytical techniques in the past decade including single scattering particles counting,single plasmonic nanoparticles sensing,and single plasmonic nanoparticles tracking/*** emphasize the discussion on the single plasmonic nanoparticles sensing that combines with dark-field microscopy and resonant Rayleigh scattering spectroscopy.

关键词：散射粒子技术基础共振瑞利散射光谱纳米粒子暗场显微镜粒子计数成像分析

Development of nitrogen and sulfur-doped carbon dots for cellular imaging

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Journal of Pharmaceutical Analysis 2019年第2期9卷 127-132页

作者： Hui Liu Yue Zhang chengzhi Huang Key Laboratory of Luminescent and Real-Time Analytical chemistry (Southwest University) Ministry of EducationCollege of Pharmaceutical SciencesSouthwest University Chongqing Key Laboratory of Biomedical Analysis (Southwest University) Chongqing Science & Technology CommissionCollege of Chemistry and Chemical EngineeringSouthwest University

Heteroatom-doped carbon dots(CDs) have attracted extensive interest because of their improved electronic and fluorescence properties with heteroatom doping. In this study, a new synthetic method for nitrogen(N) and sulfur(S)-doped CDs was developed via a hydrothermal method using methionine and citric acid as raw materials. The as-prepared CDs exhibit excellent optical properties and good biocompatibility. The spherical N,S-doped CDs have an average diameter of 5 nm. They consist of C, O, N and S, and take on excellent water solubility due to the hydroxyl and carboxyl, amino groups on the *** CDs have a photoluminescence quantum yield of 13.8% using quinine sulfate as a reference; the average fluorescence lifetime of the CDs was 3.67 ns. The CDs solution present good photoluminescence properties, and the maximum excitation wavelength and emission wavelength locate at 330 nm and405 nm, respectively. In addition, their fluorescence intensity almost does not change under the conditions of acid, alkali, and high salt, which indicated their anti-photobleaching property and good light stability. Based on the good biocompatibility and strong fluorescence emission of the CDs, they can be used as fluorescent imaging reagents.

关键词： N,S-doped carbon dots Fluorescent reagent Cellular imaging

Investigations on the amalgamation of gold nanorods by iodine and the detection of tetracycline

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Science China chemistry 2009年第2期52卷 188-195页

作者： Jian Wang Hao Wu chengzhi Huang 1. Key Laboratory of Luminescence and Real-Time Analysis of Ministry of Education College of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China

The morphological transformation process of gold nanorods (Au-NRs) resulting from the reaction between tetracycline and iodine was monitored by the plasmon resonance absorption (PRA) spectra and the scanning electron microscope (SEM) images. It was found that iodine could fuse Au-NRs into sphericity with the lower aspect ratio and blue shift of the longitudinal PRA band. It was found, however, that the presence of tetracycline, since it can react with I2, decreases the effective concentration of I2 and its fusion effect on Au-NRs. As a result, the longitudinal PRA of Au-NRs shifts to longer wavelength linearly with increasing the concentration of tetracycline. With that, tetracycline can be detected in the range of 5.0×10∮5- 5.0×10−4 mol·L−1, with a limit of determination (LOD) of 2.4×10−6 mol·L−1 (3σ). Most foreign substances in the samples did not interfere in the detection, and tetracycline in the synthetic samples could be detected with the recovery in the range of 92.8%–107.2%, and RSD lower than 4.3%. The concentration of tetracycline in milk detected with standard addition method was so low that it accorded with the safety regulation.

关键词： gold nanorods iodine tetracycline hydrochloride plasmon resonance absorption

Multi-walled carbon nanotubes based catalyst plasmon resonance light scattering analysis of tetracycline hydrochloride

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Science China chemistry 2008年第9期51卷 866-871页

作者： HU Po HUANG chengzhi ZHANG Li College of chemistry and chemical engineering MOE Key Laboratory on Luminescence and Real-Time AnalysisSouthwest Uni-versityChongqing 400715China

It was found that multi-walled carbon nanotubes (MWNTs) could catalyze the redox reaction between chlorauric acid (HAuCl4) and reductive drugs such as tetracycline hydrochloride (TC), producing gold nanoparticles (Au NPs). By measuring the plasmon resonance light scattering (PRLS) signals of the resulting Au NPs, tetracycline hydrochloride can be detected simply and rapidly with a linear range of 4―26 μmol/L, a correlated coefficient (r ) of 0.9955, and a limit of detection (3σ) of 6.0 nmol/L. This method has been successfully applied to the detection of tetracycline hydrochloride tablets in clinic with the recovery of 101.9% and that of fresh urine samples with the recovery of 98.3%―102.0%.

关键词： MWNTs chlorauric acid tetracycline hydrochloride plasmon resonance light scattering