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Novel fluorescent chemosensor for Ag^+ based on coumarin fluorophore

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Chinese Chemical Letters 2008年第8期19卷 977-980页

作者： mao xiang wang xiang ming meng man zhou zhu qing xiang guo Department of Chemistry University of Science and Technology of China Hefei 230026 China

A novel chemosensor 1 （CS1） bearing one coumarin and two carbodithioate groups was synthesized and its fluorescent sensing behavior toward metal ions was investigated. Ag^＋ addition to a CH3COCH3/H2O （3：7, v：v） solution of CS1 gave a significantly quenched fluorescence. Other ions including Pb^2＋, Zn^2＋, Cu^2＋, Ca^2＋, Cd^2＋, Co^2＋, Mg^2＋, Mn^2＋, Hg^2＋, Ag^＋, Ni^2＋ induced no or much smaller spectral changes. This constitutes an ON-OFF Ag^＋-selective fluorescent chemosensor.

关键词： Ag^+ chemosensor Fluorescence PET Coumarin

A novel highly selective fluorescent chemosensor for Hg(Ⅱ) in fully aqueous media

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Chinese Chemical Letters 2007年第10期18卷 1209-1212页

作者： xiang ming meng man zhou zhu qing xiang guo Department of Chemistry University of Science and Technology of China Hefei 230026 China

A novel fluorescent Hg^2＋ chemosensor based on dithia-dioxa-monoaza crown ether was synthesized in four steps from inexpensive starting materials. This new sensor exhibited very strong fluorescence response to Hg^2＋... 详细信息

关键词： Hg^2+ sensor Fluorescence PET Fluorescein Selectivity

The Electron Transfer Reaction between ρ-Nitrobenzoates and β-N, N-Dimethylaminonaphthalene

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Chinese Chemical Letters 2003年第2期14卷 159-162页

作者： Yong Hui wang man zhou zhu Tao LIU qing xiang guo Department of Chemistry University of Science and Technology of ChinaHefei 230026

A few of p-nitrobenzoates were synthesized, and the electron transfer of them with b-N, N-dimethylaminonaphthalene (Dman) in methanol solution was studied. Steady-state fluore-scence results showed the cyclodextrin moiety in p-nitrobenzoyl-b-cyclodextrin would block the electron transfer pathway from Dman compared with other electron acceptors, thus, reduced the electron transfer efficiency.

关键词： Electron transfer β-cyclodextrin naphthalene derivatives fluorescence.

Design and Synthesis of Lipids Bearing Nucleosides as Gene Vectors

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Chinese Chemical Letters 2001年第9期12卷 779-782页

作者： man zhou zhu Qi Hua WU qing xiang guo Department of Chemistry University of Science and Technology of ChinaHefei 230026

Some novel lipids bearing nucleosides were designed and synthesized as gene vectors, and the structures of these compounds were characterized by UV, IR, 1HNMR, 13CNMR and elemental analysis.

关键词： Gene vector lipid nucleoside synthesis

Photoinduced Electron Transfer Between Mono-6-p-nitrobenzoyl-β- cyclodextrin and Adamantanamine-Cn-Co/Ni-porphyrins

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Chinese Journal of Chemical Physics 2006年第4期19卷 329-334页

作者： guo-tao Wen man-zhou zhu Hui-yuan Hu xiang-ming meng zhuo wang qing-xiang guo Department of Chemistry University of Science and Technology of China Hefei 230025 China Provincial Key Laboratory of Research on Wastewater Treatment Technology Anhui Academy of Environmental Science Research Hefei 230051 China

Two series monot ailed porphyrins, Cobalt-5- {4- [ω- （1-adamant aneamino） alkyloxy] phenyl }- 10,15,20-triphenyl porphyrinate （CoPCnA, n=4,5,6） and Nickel-5-{4-[ω-（1-adamantaneamino）alkyloxy]phenyl}-10,15.20- triphenyl porphyrinate （NiPCnA, n=4,5,6）, were synthesized, in which the porphyrin moiety was connected to l-adamantanamine via a flexible hydrocarbon chain. The fluorescence quenching between these donor substrates and mono-6-p-nitrobenzoyl-β-cyclodextrin （NBCD） was studied in detail. Distinct fluorescence quenching occured in these supramolecular systems. This quenching was attributed to the photoinduced electron transfer （PET） inside the supramolecular assembly between the porphyrin donors and cyclodextrin acceptors. Detailed Stern-Volmer constants were measured and they were partitioned into dynamic Stern- Volmer quenching constants and static binding constants. It was demonstrated that the PET interaction between the porphyrin subunits and NBCD is indeed effective.

关键词： Photoinduced electron transfer Host-guest complex Cyclodextrin Supramolecular system Fluorescence quenching

Photoinduced Electron Transfer in Host-Guest Complexes of Naphthalene Derivatives with p-NBCD and m-NBCD

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Chinese Chemical Letters 2006年第3期17卷 333-336页

作者： Hui Yuan HU man zhou zhu Zhi Ping ZHANG guo Tao WEN qing xiang guo Department of Chemistry University of Science and Technology of China Hefei 230026

A number of naphthalene derivatives containing adamantanamine binding moiety and an （CH2）. （n = 2, 3, 4, 5, 6） spacer were prepared as electron donor. A supramolecular assembly was fabricated by the inclusion complexation of the donor substrates with the host molecules, mono-6-O-p-nitrobenzoyl-β-cyclodextrin （p-NBCD） and mono-6-O-m-nitrobenzoyl-β-cyclodextrin （m-NBCD）, in water. The fluorescence quenching in these systems was studied and detailed Stern-Volmer constants were measured. It revealed that an efficient photoinduced electron transfers （PET） between the naphthalene donors and the cyclodextrin acceptors occurred.

关键词： Cyclodextrin fluorescence quenching photoinduced electron transfer supramolecule.

Photoinduced Electron Transfer in Dumbbell-type Fullerene Dyad

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Chinese Journal of Chemical Physics 2006年第5期19卷 433-437页

作者： Hui-yuan Hu man-zhou zhu Zhi-ping Zhang guo-tao Wen Yao Fu qing-xiang guo Department of Chemistry University of Science and Technology of China Hefei 230026 China

1,3-Dipolar cycloaddition of DTE-azomethine ylides （DTE： dithienyl-ethene） to C60 in refluxed toluene was used to synthesize novel dumbbell-type fullerene dimer 1. For the sake of comparison, the monoadduct 2 were also synthesized. The molecular geometries of these two compounds were determined by theoretical calculations with HF-3/21G method. UV-Vis and fluorescence experiments were carried out in solvents with different polarity at the room temperature. All the results indicated the existence of a photoinduced intramolecular electron transfer process between the donor and acceptor moieties.

关键词： Fullerene Photophysical properties Photoinduced intramolecular electron transfer

Fluorescence Enhancement of Polyamine Derivatives of 1,8-Naphthalimide with Transition Metal Ions

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Chinese Journal of Chemical Physics 2006年第6期19卷 506-510页

作者：文国涛朱满洲王卓孟祥明胡惠媛郭庆祥中国科学技术大学化学系合肥230026 安徽省环境科学研究院安徽省污水处理技术研究重点实验室合肥230061

A series of fluorescent chemosensors 1-3 were synthesized to detect transition metal ions. At the room temperature, fluorescence intensities of these chemosensors in acetonitrile without transition metal ions were found to be very weak, due to the process of the efficient intramolecular photoinduced electron transfer （PET）. However, after addition of the transition metal ions, the chemoscnsor 1-3 exhibits obvious fluorescence enhancement. Moreover, the intensity of the fluorescence emission of chemosensors increases significantly in the presence of Zn^2＋ and Cd^2＋. The fluorescent chemosensors with different polyamine as receptors show diverse affinity abilities to the transition metal ions and signal the receptor-metal ion interaction by the intensity change of fluorescence emission.

关键词： Transition metal ion 1 8-naphthalimide Photoinduced electron transfer Fluorescence enhancement Fluorescent chemosensor

PandaX: a liquid xenon dark matter experiment at CJPL

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Science China(Physics,Mechanics & Astronomy) 2014年第8期57卷 1476-1494页

作者： CAO XiGuang CHEN Xun CHEN YunHua CUI xiangYi FANG Deqing FU ChangBo GIBONI Karl L. GONG HaoWei guo guoDong HE ming HU Jie HUANG XingTao JI xiangDong JU YongLin LI ShaoLi LIN qing LIU HuaXuan LIU JiangLai LIU xiang LORENZON Wolfgang MA YuGang mao YaJun NI KaiXuan PUSHKIN Kirill REN xiangxiang SCHUBNELL Michael SHEN manBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg wang HongWei wang Jiming wang meng wang Xuming wang zhou WEI YueHuan WU ShiYong XIAO mengJiao XIAO xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li zhou XiaoPeng zhu ZhongHua Shanghai Institute of Applied Physics The Institute of Nuclear and Particle Physics Astronomy and Cosmology (INPAC) and Department of Physics and AstronomyShanghai Jiao Tong University Yalong River Hydropower Development Company Ltd. School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University School of Physics Peking University Department of Physics University of Maryland College Park MD 20742 USA School of Mechanical Engineering Shanghai Jiao Tong University Department of Physics University of Michigan Ann Arbor MI 48109 USA

PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay *** central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton *** experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,*** detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional *** this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.

关键词： dark matter liquid xenon detector underground experiment time projection chamber