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Portable fluorogenic probe for monitoring of volatile amine vapour and food spoilage

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chinese Chemical Letters 2024年第3期35卷 257-261页

作者： Jian-Hao Zhao Wen-Xing xu Bin Li Wei xu Wu-Kun Zhang Ming-Shuai Yuan hui-Zi Li qing-guo He xiang Ma Jian-Gong Cheng Yan-Yan fu State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of SciencesBeijing 100039China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

There are urgent needs of volatile amine gas sensors with high-performance in food quality control,disease monitoring and environmental ***-film fluorescent probe is suitable for amine vapour sensing due to its high sensitivity,high selectivity,and no polluting ***,a novel fluorescent probe based on indacenodithiophene structure withπconjugated system was designed and *** experimental results show that the films prepared by this material exhibit rapid and distinct fluorescence quenching after being exposed to saturated vapours of primary amine,secondary amine and tertiary amine represented by n-propylamine,diethylamine and trimethylamine,*** quenching of fluorescence is 84%,87%and 96%,respectively,within 10 *** detection mechanism of probe for primary amine is based on specific chemical reaction,while the detection mechanism for secondary amine and tertiary amine is intramolecular charge *** experiments show that the detection limit of the fluorescent probe for trimethylamine,an important marker of food spoilage,could reach 4.610 ***-site detection based on spoilage of small yellow croaker suggests the material possesses the potential for food freshness *** simple fluorogenic probe is an original approach to simplify real-time visual monitoring of volatile amine vapour.

关键词： Fluorescent probe Volatile amine Gas sensing Trimethylamine Food spoilage

Degradation behaviors of Nabumetone and its metabolite during UV/monochloramine process:Experimental and theoretical study

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Journal of Environmental sciences 2024年第8期142卷 103-114页

作者： xiang Tu Yunsong Bai qing fu Sheng Chang Kunfeng Zhang Yang Pan Ruiyang Xiao Yifu fu Qi Zhang State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Drinking Water Source ProtectionResearch Centre of Lake EnvironmentNational Engineering Laboratory for Lake Pollution Control and Ecological RestorationChinese Research Academy of Environmental SciencesBeijing 100012China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Institute of Environmental Engineering School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China School of Forestry Northeast Forestry UniversityHarbin 150040China

This study investigated degradation behaviors of a nonsteroidal anti-inflammatory drug Nabumetone(NMT)and its major metabolite 6-methoxy-2-naphthylacetic acid(MNA)in the coupling process of ultraviolet and monochloramine(UV/NH2Cl).The second-order rate constants of the contaminants reacting with reactive radicals(HO·,Cl·,Cl_(2)·-,and CO_(3)·^(-))were determined by laser flash photolysis ***·and Cl·contributed predominantly with 52.3%and 21.7%for NMT degradation and 60.8%and 22.3%for MNA *** presence of chlorides retarded the degradation of NMT,while promoted the destruction of MNA,which was ascribed to the photosensitization effects of MNA under UV *** functional theory(DFT)calculations revealed that radical adduct formation(RAF)was dominant pathway for both HO·and Cl·reacting with the contaminants,and hydrogen atom transfer(HAT)preferred to occur on side chains of NMT and *** reacted with NO_(2)·through single electron transfer(SET)with the second-order rate constant calculated to be 5.35×10^(7)(mol/L)^(-1)sec^(-1),and the contribution of NO_(2)·was predicted to be 13.0%of the total rate constant of NMT in pure water,which indicated that NO_(2)·played a nonnegligible role in the degradation of *** acute toxicity and developmental toxicity of NMT were enhanced after UV/NH_(2)Cl treatment,while those of MNA were *** transformation products of both NMT and MNA exhibited higher mutagenicity than their parent *** study provides a deep understanding of the mechanism of radical degradation of NMT and MNA in the treatment of UV/NH2Cl.

关键词： UV/NH_(2)Cl Reactive species Degradation kinetics Reaction mechanism Degradation products

Synthesis and Effect of Cation Binding on Photophysical Properties of 1,8-Anthraceno-18-Crown-5

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chinese Chemical Letters 1999年第12期10卷 0-0,0-0页

作者： Hua JIANG hui Jun xu Pei Jie XIA qing fu zhou(Laboratory of Photochemistry, Institute of photographic chemistry,chinese academy of sciences, beijing 100101) Laboratory of Photochemistry Institute of Photographic Chemistry Chinese Academy of Sciences Beijing 100101 China

A new type of anthracene crown ether 1, 8-anthraceno-18-crown-5 has been synthesizedand the photophysical properties upon complexation with alkali and alkaline-earth metal canonswere investigated. The fiuorescence quantum yield and lifetime are appreciably enhanced, and thestability constant Ks were determined by fluorometric titration. It was found that the magnitude ofKs is controlled by the size and charge density of the complexed canons.

关键词： Crown ether photophysical property canon-binding.

SYNTHESIS AND CRYSTAL STRUCTURE OF 4,5-DIBROMO-o-OXYLYL-17-CROWN-5

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chinese Chemical Letters 1996年第8期7卷 699-700页

作者： guo chang xiong qing fu zhou hui Jun xu(Institute of photographic chemistry, chemistry, Academia Sinica, beijing 100101) Institute of photographic chemistry Academia Sinica Beijing 100101

The title compound [C16H22Br2O5] (3), was synthesized and characterized by H-1-NMR, MS and elemental analysis. Pale yellow prism crystallized from anhydrous ethanol solution was investigated by X-ray structural analysis. Crystal data: orthorhombic system space group Pbca, Mr=454.2, a=17.664(4)Angstrom b=8.625(2)Angstrom, c=24.269(5)Angstrom, z=8, Dc=1.632g/cm(3), F(000)=1776. The structure was solved by direct methods and refined to final R=0.0362, Rw=0.0357 for 1029 observed reflections with F>6.0 sigma(F).

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Quenching of zinc phthalocyanine excited states by viologen surfactant assemblies——The influence of microenvironment

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chinese Journal of chemistry 1993年第2期11卷 120-125页

作者： LIU,Ji-xiang zhou,qing-fu xu,hui-Jun Institute of Photoyraphic chemistry,chinese academy of sciences,beijing 100101 Institute of photographic chemistry Chinese Academy of Sciences Beijing 100101

A series of functional surfactants of N-alkyl-N'-butyl viologens has been synthesized. The quenching of excited singlet and triplet states of zinc phthalocyanine was studied in DMSO and in mixed micelles containing the functional surfactant as one and cationic cetyl trimethylam- monium bromide(CTAB),anionic sodium dodecylsulfate(SDS)and neutral TX-100 surfactant as the other *** quenching and laser photolysis studies indicate that the functional surfactants are solubilized at different sites in micelles,the process depends on chain length and exerts great influence on the quenching of zinc phthalocyanine excited states.

关键词： CTAB nm Quenching of zinc phthalocyanine excited states by viologen surfactant assemblies The influence of microenvironment

Photoinduced　Intramolecular　Electron　Transfer　in　an　Oblique　Zinc　Phthalocyanine－Viologen　Linked　System

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chinese Chemical Letters 1996年第10期7卷 931-934页

作者： Hong Jian TIAN qing fu zhou hui Jun xu(Institute of photographic chemistry. Academia Sinica. beijing 100101) Institute of photographic chemistry Academia Sinica Beijing 100101

The spectroscopic properties and photoinduced electron transfer process have been studied in zinc phthalocyanine-viologen system with bisphenol A (ZnPcAV2+). It was found that the excited singlet state of zinc phthalocyanine moiety is quenched and the fluorescence lifetime is reduced by the linked viologen. Nanosecond laser photolysis studies showed that intramolecular quenching of the excited triplet state of zinc phthalocyanine moiety by the attached viologen occurred giving reduced viologen radical ion (V+) that survived over 50 μs.

关键词： Electron Intramolecular

Photoinduced intramolecular electron transfer and charge separation in zinc phthalocyanine-viologen linked system

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chinese Journal of chemistry 1995年第1期13卷 33-39页

作者： SHEN, Shu-Yin LIU, Ji-xiang zhou, qing-fu xu, hui-juninstitute of photographic chemistry, chinese academy of sciences,beijing 100101, chinaTakanae, N. Kuriyama, Y. Sakurai, H. Tokumaru, Y. Department of chemistry, University of Tsukuba, Ibaraki,305 Japan Institute of photographic chemistry Chinese Academy of Sciences Beijing 100101 China Department of chemistry University of Tsukuba Ibaraki 305 Japan

Photoinduced electron transfer and charge separation processes in zinc phthalocya-nine-viologen linked system have been studied and the distance effect of donor/acceptor on electron transfer reaction is discussed. It is indicated that the fluorescence from the zinc phthalocyanine moiety is appreciably quenched and the life-time of singlet excited state is reduced by the pendant viologen. Time-resolved transient absorption spectra measurements show that intramolecular quenching of the triplet state of zinc phthalocyanine by the attached viologen results in charge separation giving reduced viologen radical alive for a rather long period with hundred microsecond duration. The effect of the carbon chain length on the electron transfer rate constant and charge separation efficiency suggests that upon excitation, the zinc phthalocyanine and viologen groups tend to take closer conformation with the increase of the carbon chain examined. The rate constant for the intramolecular electron transfer ket with n = 3 to 10 is in the order of 104 s-1 and increases.

关键词： Photoinduced electron transfer phthalocyanine viologen.

PHOTOINDUCED INTRAMOLECULAR ELECTRON TRANSFER IN A NOVEL ZINC PHTHALOCYANINE-VIOLOGEN-FERROCENE TRIAD SYSTEM

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chinese Chemical Letters 1993年第4期4卷 339-342页

作者： Ji xiang LIU qing fu zhou hui Jun xu Institute of photographic chemistry,Academia Sinica,P.O.Box 772,beijing 100101

A novel triad system zinc phthalocyanine-viologen-ferrocene has been *** intramolecular electron transfer in the new triad system was investigated by fluorescence quenching experiment and nanosecond flash photolysis technique,giving a final long-living charge- separated state.A mechanism of two-step charge separation was suggested.

关键词： PHOTOINDUCED INTRAMOLECULAR ELECTRON TRANSFER IN A NOVEL ZINC PHTHALOCYANINE-VIOLOGEN-FERROCENE TRIAD SYSTEM DHF

Effect and Safety of Herbal Medicine Foot Baths in Patients with Diabetic Peripheral Neuropathy:A Multicenter Double-Blind Randomized Controlled Trial

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chinese Journal of Integrative Medicine 2024年第3期30卷 195-202页

作者： HUANG Hao-yue LIN Yu-ping WEI Hua fu Yu zhou Yue-hong FANG Zhao-hui QIU Xiao-tang WANG Mei LI qing-bo LI Shan-shan WANG Shi-dong DAI Fang LIU Zhen-jie ZHAO Ling WEN Jian-xuan WU Li-yan ZENG hui-yan ZHANG Jin-ming LU Qi-yun HE Liu SONG Wei SUN Lu LUO Lu-lu HE Jia-li XIE Wen-wen LIANG qing-shun HUANG Yuan ZHU Sheng-ling LONG Jie-er GAO Zhi-juan WEN Ze-huai LI Chun-ji OUYANG Wen-wei LI Geng WU Ming-hui LI An-xiang HUANG Jin-zhu Sanjoy K Paul TANG Xian-yu FAN Guan-jie Department of Endocrinology Guangdong Provincial Hospital of Chinese MedicineGuangzhou510120China The Second Clinical College of Guangzhou University of chinese Medicine Guangzhou510120China Department of Endocrinology The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou510120China Guangdong Provincial academy of chinese Medical sciences Guangzhou510120China Department of Endocrinology The First Affiliated Hospital of Henan University of Chinese MedicineZhengzhou450000China Department of Endocrinology Liuyang Hospital of Chinese MedicineChangsha410000China Department of Endocrinology The First Affiliated Hospital of Anhui University of Chinese MedicineHefei230000China Department of Endocrinology Hainan Provincial Hospital of Traditional Chinese MedicineHaikou570100China Department of Endocrinology The Affiliated Hospital of Liaoning University of Traditional Chinese MedicineShenyang110000China Department of Geriatric Luoyang No.1 Hospital of Traditional Chinese MedicineLuoyangHenan Province471000China Department of Endocrinology The Second Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550000China Department of Endocrinology Beijing University of Chinese Medicine Affiliated Dongzhimen HospitalBeijing100000China Department of Endocrinology The First Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang550000China Melbourne EpiCentre The University of Melbourne and Melbourne HealthMelbourne3013Australia

Objective:To evaluate the effect and safety of foot baths with Tangbi Waixi Decoction(TW)in treating patients with diabetic peripheral neuropathy(DPN).Methods:It is a multicenter double-blinded randomized controlled *** with DPN were recruited between November 18,2016 and May 30,2018 from 8 hospitals in *** patients received basic treatments for glycemic *** received foot baths with TW herbal granules either 66.9 g(intervention group)or 6.69 g(control group)for 30 min once a day for 2 weeks and followed by a 2-week rest,as a therapeutic *** the Toronto Clinical Scoring System total score(TCSS-TS)6 points,the patients received a total of 3 therapeutic courses(for 12 weeks)and were followed up for 12 *** primary outcome was change in TCSS-TS score at 12 and 24 *** outcomes included changes in bilateral motor nerve conduction velocity(MNCV)and sensory nerve conduction velocity(SNCV)of the median and common peroneal *** was also ***:Totally 632 patients were enrolled,and 317 and 315 were randomized to the intervention and control groups,*** the 12-week intervention,patients in both groups showed significant declines in TCSSTS scores,and significant increases in MNCV and SNCV of the median and common peroneal nerves compared with pre-treatment(P0.05),and no serious adverse event was related with ***:Treatment of TW foot baths was safe and significantly benefitted patients with DPN.A low dose of TW appeared to be more effective than a high dose.(Registry *** CTR-IOR-16009331)

关键词： diabetic peripheral neuropathy herbal medicine foot baths chinese medicine randomized controlled trial Tangbi Waixi Decoction