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| 1 | Lanthanide NIR luminescence for telecommunications, bioanalyses and solar energy conversion显示文摘Present-day advanced technologies heavily rely on the exciting magnetic and spectroscopic properties of lanthanide ions. In particular, their ability to generate well-characterized and intense near-infrared (NIR) luminescence is exploited in any modern fiber-optic telecommunication network. In this feature article, we first summarize the whereabouts underlying the design of highly luminescent NIR molecular edifices and materials. We then focus on describing the main trends in three applications related to this spectral range: telecommunications, biosciences, and solar energy conversion. In telecommunications, efforts concentrate presently on getting easily processable polymer-based waveguide amplifiers. Upconversion nanophosphors emitting in the visible after NIR excitation are now ubiquitous in many bioanalyses while their application to bio-imaging is still in its early stages; however, highly sensitive NIR-NIR systems start to be at hand for both in vitro and in vivo imaging, as well as dual probes combining magnetic resonance and optical imaging. Finally, both silicon-based and dye-sensitized solar cells benefit from the downconversion and upconversion capabilities of lanthanide ions to harvest UV and NIR solar light and to boost the overall quantum efficiency of these next-generation devices. | Jean-Claude G. Bünzli Svetlana V. Eliseeva | 2010 | Journal of Rare Earths2010，28，6： | 22 |
| 2 | CHEMICAL CONSTITUENTS OF LONICERA MACRANTHOIDES HAND.-MAZZ Ⅰ.STRUCTURE OF MACRANTHOISIDE I显示文摘A new bisdesmosidic triterpene saponin,macranthoiside I,wasisolated from L.macranthoides.Its structure was determinedby chemical degradation and spectroscopic analysis. | Min CHEN Si Qi LUO Hui Ting LI Shanghai Institute of Pharmaceutical Industry Shanghai,200040 | 1990 | Chinese Chemical Letters1990，1，3： | 11 |
| 3 | Cytotoxicity evaluation and hepatoprotective potential of bioassay guided fractions from Feronia limmonia Linn leaf显示文摘Objective:To evaluate the cytotoxicity and hepatoprotective potentials of extracts,fractions or isolated compound from the leaves of Feronia limonia(F.limonia).Methods:Qualitative phytochemical analysis of extracts,fractions or compound was performed by means of thin layer chromatography and spectroscopic assays.The%purity of compound was measured by analytical HPLC.Extracts,fractions or compound have been individually evaluated for their cytotoxicity effects(10,20,100,250,500,750 and 1 000 μg/mL).Based on the inhibitory concentration(IC_(50)) obtained from the cell viability assay,graded concentrations of extracts,fractions or isolated compound were assessed(10,20,50,100,200 μg/mL) for its hepatoprotective potential against CCl_4-induced hepatotoxicity by monitoring activity levels of serum glutamatic pyruvatic transaminase(SGPT) and serum glutamic oxaloacetic transaminase(SGOT).Results:Results indicated that the methanol extract of F.limonia was non-toxic and hepatoprotective in nature as compared with the petroleum ether extract.The acetone fraction of methanolic extract also showed similar properties but the subsequent two fractions were cytotoxic.However,the pure compound isolated from the penultimate fraction of methanolic extract was non-toxic and hepatoprotective in nature.Biochemical investigations(SCOT,SCPT) further corroborated these cytological observations.Conclusions:It can be concluded from this study that F.limonia methanol extract,some fractions and pure isolated compound herein exhibit hepatoprotective activity.However,cytotoxicity recorded in the penultimate fraction and investigation of structural details of pure compound warrants further study. | Mahendra Jain Rakhee Kapadia Ravirajsinh N Jadeja Menaka C Thounaojam Ranjitsinh V Devkar SH Mishra | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，6： | 11 |
| 4 | Spectroscopic Measurements of Physiological Elements in Microdialysis Samples from Rat Brain,Flowering Plum Fruit and Pea显示文摘IntroductionMicrodialysisisanimportantbioanalyticalsamplingtechnique,whichinvolvestheimplantationofasmallprobeofsemipermeablemembraneintothesubjecttobestudiedl.Themethodisminimallyinvasiveandverysuitableforstudyingparameterssuchasphysiologicalelement... | Hut Min MA Zhi Hua WANG Yi ZENG Hut Wan HAN Guo Quan LIU(Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080) | 1999 | Chinese Chemical Letters1999，10，3： | 8 |
| 5 | A new ent-atis-16-ene type diterpenol from Euphorbia sieboldiana显示文摘From the acetone extract of the root of Euphorbia sieboldiana,a new ent-atis-16-ene typediterpenol was isolated and its structure was demonstrated as ent-atis-16-ene-13 α-hydroxy-3,14-dione(1)based on the chemical as well as NMR and MS spectroscopic evidences,and finally confirmed by X-ray diffraction, | DING,Yi-Li JIA,Zhong-Jian WANG,Qi-Guang CHEN,Ji-Hong LIU,Yu-Ting Institute of Organic Chemistry,Lanzhou University,Lanzhou 730000 Department of Chemistry,Xingjiang University. | 1991 | Chinese Journal of Chemistry1991，9，2： | 5 |
| 6 | Physical properties and catalog of EW-type eclipsing binaries observed byLAMOST显示文摘EW-type eclipsing binaries(hereafter called EWs)are strong interacting systems in which both component stars usually fill their critical Roche lobes and share a common envelope.Numerous EWs were discovered by several deep photometric surveys and there were about 40 785 EW-type binary systems listed in the international variable star index(VSX)by 2017 March 13.7938 of them were observed with LAMOST by 2016 November 30 and their spectral types were identified.Stellar atmospheric parameters of 5363 EW-type binary stars were determined based on good spectroscopic observations.In the paper,those EWs are cataloged and their properties are analyzed.The distributions of orbital period(P),effective temperature(T),gravitational acceleration(log(g)),metallicity([Fe/H])and radial velocity(RV)are presented for these observed EW-type systems.It is shown that about 80.6% of sample stars have metallicity below zero,indicating that EW-type systems are old stellar populations.This is in agreement with the conclusion that EW binaries are formed from moderately close binaries through angular momentum loss via magnetic braking that takes a few hundred million to a few billion years.The unusually high metallicities of a few percent of EWs may be caused by contamination of material from the evolution of unseen neutron stars or black holes in the systems.The correlations between orbital period and effective temperature,gravitational acceleration and metallicity are presented and their scatters are mainly caused by(i)the presence of third bodies and(ii)sometimes wrongly determined periods.It is shown that some EWs contain evolved component stars and the physical properties of EWs mainly depend on their orbital periods.It is found that extremely short-period EWs may be older than their long-period cousins because they have lower metallicities.This reveals that they have a longer timescale of pre-contact evolution and their formation and evolution are mainly driven by angular momentum loss via magnetic braking. | Sheng-Bang Qian Jia-Jia He Jia Zhang Li-Ying Zhu Xiang-Dong Shi Er-Gang Zhao Xiao Zhou | 2017 | Research in Astronomy and Astrophysics2017，17，8： | 4 |
| 7 | New seco-dibenzocyclooctadiene lignans with nitric oxide production inhibitory activity from the roots of Kadsura longipedunculata显示文摘Four new seco-dibenzocyclooctadiene lignans,kadlongilignans A-D(1-4),consisting of a rare 6,7-seco-(1),two 15,16-seco-(2 and 3) and a 9,10-seco-dibenzocyclooctadiene(4) lignans,were isolated from the roots of Kadsura longipedunculata.Their structures were elucidated by spectroscopic analysis,including extensive NM R,MS and ECD(electronic circular dichroism) spectra.Compounds 3 and 4 exhibited potent inhibitory activities against NO(nitric oxide) production of LPS(lipopolysaccharide)-induced murine macrophages with the inhibition rates of 36.3% and 26.9%,respectively. | Xinzhu Qi Jiabao Liu Jiabao Chen Qi Hou Shuai Li | 2020 | Chinese Chemical Letters2020，31，2： | 4 |
| 8 | A new dammarane-type triterpene saponin from Gynostemma pentaphyllum显示文摘One new dammarane-type triterpene saponin, named (20S)-3β,20,21-trihydroxydammar-24-ene 3-O[α-L- rhamnopyranosyl-(1→2)][β-D-xylopyranosyl(l→3)]-β-D-glucopyranoside (1), was isolated from the aerial parts of Gynostemma pentaphyllum (Thunb.) Makino. Its structural elucidation was accomplished mainly on the basis of the interrelation of spectroscopic methods, such as IR, HR-TOF-MS, NMR. | Lin | 2010 | Chinese Chemical Letters2010，21，6： | 4 |
| 9 | HETEROPHYLLIN-A AND B,TWO CYCLOPEPTIDES,FROM THE ROOTS OF PSEUDOSTELLARIA HETEROPHYLLA显示文摘Two cyclopeptides,heterophyllin A and B,have been isolated from the rootsof Pseudostellaria heterophylla.Their structures were elucidated by chemical,spectroscopic,and enzymatic methods. | Ning Hua TAN Shou Xun ZHAO a Department of Phytochemistry,China Pharmaceutical University,Nanjing,210009 Jun ZHOU Hong Jie ZHANG De Zu WANG Chang Xiang CHEN Xiao Zhu LIU b Laboratory of Phytochemistry,Kunming Institute of Botany,Academia Sinica,Kunming,650204 | 1992 | Chinese Chemical Letters1992，3，8： | 4 |
| 10 | Intense upconversion luminescence of Er^(3+)/Yb^(3+) codoped oxyfluoride borosilicate glass ceramics containing Ba_2GdF_7 nanocrystals显示文摘Er3+/Yb3+-codoped transparent oxyfluoride borosilicate glass ceramics containing Ba2GdF7 nanocrystals were prepared and spectroscopic properties of rare earth ions were investigated. Fluoride nanocrystals Ba2GdF7 were successfully precipitated in glass matrix, which was confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) results. In comparison with the as-made precursor, significant enhancement of upconversion luminescence was observed in the Er3+/Yb3+ codoped oxyfluoride glass ceramics, which may be due to the variation of coordination environment around Er3+ and Yb3+ ions after crystallization. The transition mechanisms of the green and red upconversion luminescence were ascribed to a two-photon process, and that of the blue upconversion luminescence was a three-photon process. | 赵士龙 徐时清 邓德刚 樊先平 | 2010 | Journal of Rare Earths2010，28，6： | 3 |
| 11 | Valence Bond Study of Dissociation Behavior and Spectroscopic Constants for the Ground States of LiF and NaF显示文摘IntroductionThealkalihalidediatomicmoleculesprovideatypicalcurvecrosingproblem[1].Theoutstandingnonadiabaticbehaviorofthechem... | CAO Ze xing ** , WU Wei and ZHANG Qian er (Department of Chemistry, State Key Laboratory for Physical Chemistry of the Surface Science, and Institute of Physical Chemistry, Xiamen University, Xiamen, 361005) | 1998 | Chemical Research in Chinese Universities1998，14，3： | 3 |
| 12 | Isolation, properties and spatial site analysis of γ subunits of B-phycoerythrin and R-phycoerythrin显示文摘Polysiphonia urceolata R phycoerythrin and Porphyridium cruentum B phycoerythrin were degraded with proteinaseK, and then the nearly native γ subunits were isolated from the reaction mixture. The process of degradation of phycoerythrin with proteinaseK showed that the γ subunit is located in the central cavity of (αβ) 6 hexamer of phycoerythrin. Comparative analysis of the spectra of the native phycoerythrin, the phycoerythrin at pH 12 and the isolated γ subunit showed that the absorption peaks of phycoerythrobilins on α or β subunit are at 535 nm (or 545 nm) and 565 nm, the fluorescence emission maximum at 580 nm; the absorption peak of phycoerythrobilins on the isolated γ subunit is at 589 nm, the fluorescence emission peak at 620 nm which overlaps the absorption maximum of C phycocyanin and perhaps contributes to the energy transfer with high efficiency between phycoerythrin and phycocyanin in phycobilisome; the absorption maximum of phycourobilin on the isolated γ subunit is at 498 nm, which is the same as that in native phycoerythrin, and the fluorescence emission maximum at 575 nm. | 王广策 周百成 曾呈奎 | 1998 | Science China(Life Sciences)1998，41，1： | 3 |
| 13 | Raman spectroscopic characteristics of microcosmic and photosensitive damage on space structure of liposomes sensitized by hypocrellin and its derivatives显示文摘Raman spectroscopic characteristics of microcosmic and photosensitive damage on space structure of DPPC liposomes sensitized by hypocrellin and its derivatives are obvious. The trans conformation decreased and the gauche conformation increased. The longitudinal order_parameter in chains and the lateral order_parameter between chains decreased in different degrees. The lateral packing became loose. Photodamage on the liposomes sensitized by 5 Br hypocrellin B was stronger than that by hypocrellins A and B. | 许以明 张志义 张伟 | 1998 | Science China(Life Sciences)1998，41，5： | 3 |
| 14 | Identification and characterization of three new flavonoids from Rhododendron dauricum显示文摘The present study was designed to determine the major chemical constituents of the leaves of Rhododendron dauricum L. Compounds were isolated and purified by various chromatographic methods, and their structures were elucidated by physicochemical properties and spectral data. The present study identified two new C-methyl flavanones, 5, 7, 3', 5'-tetrahydroxy-6, 8-di-C-methyl flavanone(1) and 5, 4'-dihydroxy-8-C-methylflavanone-7-O-β-D-glucopyranoside(2), and one new flavonoid glycoside, quercetin-3-O-β-D-(6''-O-cinnamoyl)-galactoside(3), along with seven known compounds, including syzalterin(4), poriolin(5), farrerol-7-O-β-D-glucopyranoside(6), myrciacetin(7), quercetin-3-O-β-D-(6-p-hydroxy-benzoyl)-galactoside(8), quercetin-3-O-β-D-(6-p-coumaroyl)-galactoside(9), and 5, 7, 3', 5'-tetrahydroxyl flavanone(10). Compounds 1-3 were determined to be new flavonoids; compounds 4-6 were isolated from this species for the first time; and compounds 7-10 were reported for the first time from this genus. | LOU Xin-Wei LIN Qing-Hua ZHANG Guan-Yu LIU Wen-Yuan FENG Feng QU Wei | 2015 | Chinese Journal of Natural Medicines2015，13，8： | 2 |
| 15 | Interaction of repaglinide with bovine serum albumin:Spectroscopic and molecular docking approaches显示文摘Repaglinide (RPG) regulates the amount of glucose by stimulating the pancreas to release insulin in the blood. In view of its biological importance, we have examined the interaction between RPG and a model protein, bovine serum albumin (BSA) employing various spectroscopic, electrochemical and molecular docking methods. Fluorescence spectra of BSA were recorded in the presence and absence of RPG in phosphate buffer of pH 7.4. Fluorescence intensity of BSA was decreased upon the addition of increased concentrations of RPG, indicating the interaction between RPG and BSA. Stern-Volmer quenching analysis results revealed that RPG quenched the intensity of BSA through dynamic quenching mechanism. This was further confirmed from the time-resolved fluorescence measurements. The binding constant as calculated from the spectroscopic and voltammetric results was observed to be in the order of 104M-1 at 298 K, suggesting the moderate binding affinity between RPG and BSA. Competitive experimental results revealed that the primary binding site for RPG on BSA was site II. Absorption and circular dichroism studies indicated the changes in the secondary structure of BSA upon its interaction with RPG. Molecular simulation studies pointed out that RPG was bound to BSA in the hydrophobic pocket of site II. | Suma K.Pawar Seetharamappa Jaldappagari | 2019 | Journal of Pharmaceutical Analysis2019，9，4： | 2 |
| 16 | NEW SESQUITERPENES FROM LIGULARIA VEITCHIANA显示文摘Two new eremophilane derivatives and one new nor-sesquiterpene were isolated fromLigularia veitchiana.Their structures were elucidated by spectroscopic methods and 2D-NMR tech-niques and shown to be 1β,10β-epoxy-6β-(2′—semialdehyde acetal hydroxymethylacryloyloxy)-8β-ethoxy-eremophil-7(11)-en-12,8α-olide(1),1β-hydroxy-Δ~6,Δ~9-8-oxo-eremophil-(12)-oic-acid(2)and 1β-hydroxy-Δ~6,Δ~9-8-oxo-11-nor-11-hydroxy-eremophiladiene(3). | Yu ZHAO Zhong Jian JIA Institute of Organic Chemistry,State Key Laboratory of Applied Organic Chemistry at Lanzhou University,Lanzhou 730000. | 1993 | Chinese Chemical Letters1993，4，4： | 2 |
| 17 | 高温高压下NaCl-H_2O体系的Raman光谱分析:一种新的流体包裹体盐度测定方法显示文摘利用水热金刚石压腔研究了高温高压下0.0%、5.0%、10.0%和20.0%的NaCl-H_2O体系的Raman光谱,研究结果发现:对于盐度一定的NaCl-H_2O体系,当压力不变时,水的Raman伸缩谱峰的波数变化量△v_((O-H))随温度的升高而不断增加;当压力不同时,△v_((O-H))随温度的变化关系(偏移斜率S)不受压力的影响,而只与盐度相关。利用该性质可以用来确定流体包襄体的盐度(W),其计算公式如下:W=123.25S^2-128.11S+32.40,误差为0.46%。 | 杨玉萍 郑海飞 张立飞 刘曦 邓松涛 | 2009 | 岩石学报2009，25，8： | 2 |
| 18 | ISOLATION, STRUCTURE ELUCIDATION AND SYNTHESIS OF A NEW PRENYLATED FLAVONOL, MAACKIAFLAVONOL, FROM MAACKIA TENUIFOLIA显示文摘A new prenylated flavonol, maackiaflavonol, was isolated from the ethanol extract of the roots of Maackia tenuifolia. Its structure was elucidated as 7-hydrox-8-prenylflavonol by means of spectroscopic analysis (UV, IR, MS, NMR and 1H-1H COSY) and confirmed by total synthesis. | Jian Hua SHEN, Lan WANG and Bing Nan ZHOU State Key Laboratory for New Drug Research, Shanghai Institute of Materia Medica, Academia Sinica, Shanghai 200031 | 1991 | Chinese Chemical Letters1991，2，8： | 2 |
| 19 | Synthesis and spectroscopic properties of rare earth picrate complexes with a new dinaphthalenelamide显示文摘The new ligand N-benzyl-2-{2'-[(benzyl-ethyl-carbamoyl)-methoxy]-dinaphthalene-2-yloxy}-N-ethyl-acetamide(L) and its complexes of rare earth picrates were synthesized.The complexes were characterized by elemental analysis,IR,UV-vis spectra and conductivity measurements.The fluorescence properties of the europium complex in solid state and CHCl3,ethyl acetone,acetonitrile and DMF were investigated.Under the excitation,the europium complex exhibited characteristic emissions of europium.The lowest triplet state energy level of the ligand indicated that the triplet state energy level of the ligand matched better to the resonance level of Eu(Ⅲ) than Tb(Ⅲ) ion. | 杨天林 张晶晶 高敏 杨金会 | 2010 | Journal of Rare Earths2010，28，S1： | 2 |
| 20 | ISOLATION AND STRUCTURES OF FOUR CYCLODIPEPTIDES显示文摘Three novel interesting polychlorinated cyclodipeptides,designated dyssmideA(1),B(2),C(3)and a known compound,2,3-dihydrodyeamide C(4)were isolated fromthe sponge Dysidea sp.Their structures were elucidated by spectroscopic methods. | Jing Yu SU~* Yong Li ZHONG Long Mei ZENG Department of Chemistry,Zhongshan University,Guangzhou,510275Wei SHEN Qi Wen WANG State Key Laboratory of Bio-organic and Natural Products Chemistry,Shanghai Institute of Organic Chemistry,Shanghai 200032 | 1993 | Chinese Chemical Letters1993，4，2： | 2 |
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