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Journal of Rare Earths 2006年第3期24卷 275-275页

作者： Ma Ruixia Wang Ruifen Wang Shuping Zhang Jianjun College of Chemistry and Materival Science Hebei Normal University Shijiazhuang 050016 China Experimental Center Hebei Normal University Shijiazhuang 050016 China

Seven ternary Eu （m） complexes were synthesized with aromatic carboxylic acid （benzoic acid, phenylacetic acid, phenylpropionic acid and cinnamic acid） as the first ligand and 1,10-phenanthro- line or 2,2＇-dipyridyl as the second ligand. The ternary Eu（ Ⅲ ） complexes were characterized by elemental analysis, IR and TG-DTG methods. In these complexes, the Eu （Ⅲ） ions are bonded to the oxygen atoms of carboxylate and the nitrogen atoms of neutral ligands. Four complexes whose second ligand is 1,10- phenanthrolin have fine thermal stability. Excitation and luminescence spectra of the tide complexes reveal that the fluorescence of the complexes in which 1,10- phenanthrolin as the second ligand are more intensive than those complexes in which 2, 2＇-dipyridyl as the second ligand. The order of the strongest emission peak of seven ternary complexes is： Eu（β-PPA）3phen 〉 Eu（BA）3phen 〉 Eu（PLA）3phen 〉 Eu（BA）3bipy 〉 Eu （ PEA）3bipy 〉 Eu （ CA ）3phen · H2O 〉 Eu （ CA ）3bipy （BA ： benzoic ; PEA ： phenylacetic ; β-PPA ：

关键词： aromatic carboxylic acid europium ternary complex thermal decomposition fluorescence spectra rare earths

Separation of aromatic carboxylic acids in IC and the Study on the Relationship Between Retention Behavior and Electrostatic Potential

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Chinese Journal of Structural Chemistry 2010年第4期29卷 641-646页

作者：王艳花韩小江陈雪松李立朱岩 College of Biology and Environment Engineering Zhejiang Shuren University Department of Chemistry Zhejiang University

A method has been developed for separation of 20 kinds of aromatic carboxylic acid using anion-exchange chromatography. A Dionex IonPac AS9-HC guard column （250mm×2mm） was used with a 9mmol/L sodium carbonate solution containing 50% （v/v） acetonitrile as eluent. A set of retention time data has been obtained using a conductivity detector DS6. Furthermore, geometrical optimization and electrostatic potential calculation of 20 kinds of aromatic carboxylic acid have been performed at the HF/6-31G＊ level of theory. A number of statistically-based parameters derived from molecular surface electrostatic potential have been obtained. Linear relationship between retention time and structural parameters has been established by multiple regression method. The result shows that parameters derived from electrostatic potential Vs ＋, Vs -, П together with the dipole moment μ can be well used to express the quantitative structure-retention time of this kind of aromatic carboxylic acid. Good predictive capability has also been demonstrated. The result has provided a framework which further proves the general applicability of this electrostatic potential parameter set to a great extent,and with which the ion chromatographic adsorption mechanism can be investigated.

关键词： Ion chromatography Retention time QSRR molecular electrostatic potential aromatic carboxylic acid

Synthesis and photoluminescent performance of novel europium(Ⅲ) carboxylates with heterocyclic ancillary ligands

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Rare Metals 2022年第4期41卷 1342-1352页

作者： Priyanka Dhankhar Rekha Devi Sushma Devi Sangeeta Chahar Mandeep Dalal V.B.Taxak S.P.Khatkar Priti Boora Department of Chemistry Maharshi Dayanand UniversityRohtak 124001India

Five novel europium(Ⅲ)complexes with 2-[4-(dibutylamino)-2-hydroxybenzoyl]benzoic acid(DAHB)as primary ligand and bathophenanthroline(batho),2,2’-bipyridyl(bipy),5,6-dimethyl-1,10-phenanthroline(dmph),1,10-phenanthroline(phen)as ancillary ligands were syn-thesized via solution precipitation *** structural formulae of synthesized complexes were speculated to be Eu(DABH)_(3)·2H_(2)O(C1),Eu(DABH)_(3)·batho(C2),Eu(DABH)_(3)·bipy(C3),Eu(DABH)_(3)·dmph(C4)and Eu(DABH)_(3)·phen(C5)by elemental analysis,infrared spectroscopy and proton nuclear magnetic resonance spec-troscopy(^(1)H-NMR).The photoluminescent properties and thermal stability of the complexes were investigated by photoluminescent spectroscopy and thermogravimetric analysis(TG-DTG),*** Commission Inter-nationale de I’Eclairage(CIE)color coordinates,Judd–Ofelt intensity parameter(Ω_(2)),total quantum yield,intrinsic quantum efficiency and energy transfer dynamics of com-plexes were also *** excitation spectra of com-plexes are extended up to visible *** complexes exhibit characteristic photoemission of Eu^(3+)metal ion with high color purity in red region attributed to efficient energy transfer from ligand to metal *** replacement of water molecules from coordination sphere of europium ion by ancillary ligands results in enhancement of luminescent properties of the C2–C5 complexes,indicating that ancillary ligands act as additional light harvesting centers in sensiti-zation *** thermal studies show that these complexes are suitable for meeting the requirement of temperature for fabrication of OLEDs devices.

关键词： Photoluminescence Europium Sensitization aromatic carboxylic acid Energy transfer dynamics

Functionalized Metal-organic Frameworks for White Light Emission and Highly Sensitive Sensing of PA and Fe^(3+)/Al^(3+)

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Chinese Journal of Structural Chemistry 2022年第3期41卷 30-39,I0007页

作者： HUANG Jing-Jing ZHAO Dan YIN Guo-Jie Luoyang Institute of Science and Technology Luoyang 471023China

Three isomorphic Ln-MOFs[Ln(bcbob)(H_(2)O)(DMF)](Ln=Tb for 1,Eu for 2,Gd for 3;DMF=N,N-dimethylformamide)have been constructed from a semi-rigid V-shaped organic linker 3,5-bis((4'-carboxyl-benzyl)oxy)benzoilate acid(H3bcbob)under solvothermal conditions.X-ray single-crystal diffraction analysis re-veals that they exhibit a two-dimensional(2D)layered *** 1~3 show the characteristic green and red emissions of Ln^(3+)and blue emission arising from the organic ligand,*** on their photo-luminescence properties,the white-light emitting materials 4 and 5 with longer fluorescence lifetime(ms grade)and higher quantum yield(e.g.40.61%for 4)are ***,1 exhibits good sensing ability on ni-troaromatic compounds,especially for picric acid(PA).In addition,1 is still a highly selective sensing material for Fe^(3+)and Al^(3+).

关键词： lanthanide organic frameworks aromatic carboxylic acid fluorescence doping chemical sensingdiiron

Selective adsorption behaviors of guest molecules COR in the hexamer host networks at liquid/solid interface

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Chinese Chemical Letters 2021年第3期32卷 1077-1080页

作者： Xiaokang Li Jianqiao Li Chunyu Ma Chen Chen Siqi Zhang Bin Tu Wubiao Duan Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Department of Chemistry School of ScienceBeijing Jiaotong UniversityBeijing 100044China Center of Materials Science and Optoelectonics Engineering University of Chinese Academy of SciencesBeijing 100049China

Here,the selective adsorption behaviors of guest molecule COR in two hexamer host grids were investigated by means of scanning tunnelling microscope(STM).The assembled structures of small functional organic molecules TTBTA and TATBA were thermodynamically ***,the introduction of the guest molecule COR destroyed the original hexamer structure of TTBTA and combined with it to form a new triangular host-guest *** from TTBTA,the introduction of the guest molecule COR did not affect the six-membered ring structure of ***,the co-assembly structure of TTBTA/TATBA/COR was established and the guest molecule COR showed preferential adsorption to the TATBA host *** functional theory(DFT)calculations had been performed to disclose the mechanism of the involved assemblies.

关键词： Scanning probemicroscopy(STM) Selective adsorption Host-guest chemistry Supramolecular chemistry aromatic carboxylic acid