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Highly luminescent europium and terbium complexes based on succinimide and N-hydroxysuccinimide

Journal of Rare Earths 2012年第5期30卷 401-407页

作者： Corneliu Sergiu Stan Ioan Rosca daniel sutiman Marius Sebastian Secula Faculty of Chemical Engineering and Environmental Protection Gheorghe Asachi Technical University of Iasi73 D.Mangeron700050IasiRomania

The preparation of two highly luminescent europium（Ill） and terbium（Ill） complexes with succinimide （SI） and N-hydroxysuccinimide （NHSI） were reported, which were further investigated through elemental chemical analysis, thermal analysis, FT-IR, powder X-ray diffraction, SEM and fluorescence spectroscopy. Data collected through these analysis revealed the formation of the Eu（III） and Th（III） complexes with the above mentioned ligands at a metal to ligand （M：L） molar ratio of 1：3. Interesting conclusions regarding the effi- cient sensitization through the coordination site of the lanthanide luminescent centers were retained from the photoluminescent spectra inves- tigation. Strong luminescence emission was observed in case of Eu（III）-SI and Tb（III）-NHSI complexes while the corresponding Eu（III）-NHSI and Tb（III）-SI complexes exhibited no photo luminescent properties. Newly obtained luminescent lanthanide complexes may be of particular interest for various applications in optoelectronics.

关键词： lanthanide complex succinimide N-hydroxysuccinimide luminescence rare earths

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Electrochemical behaviour of Ti alloys containing Mo and Ta as β-stabilizer elements for dental application

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Transactions of Nonferrous Metals Society of China 2013年第12期23卷 3829-3836页

作者： daniel MARECI Romeu CHELARIU Georgiana BOLAT Adrian CAILEAN Viorel GRANCEA daniel sutiman Faculty of Chemical Engineering and Environmental Protection "Gheorghe Asachi" Technical University of Iasi Faculty of Materials Science and Engineering "Gheorghe Asachi" Technical University of Iasi

Corrosion behaviour of the studied Ti12Mo and Ti60Ta alloys with the same Mo equivalent values （12%, mass fraction） together with the currently used metallic biomaterials Cp-Ti were investigated for dental applications. The electrochemical properties of the samples were examined using electrochemical techniques： such as open-circuit potential, potentiodynamic polarization curves and electrochemical impedance spectroscopy （EIS）, in two electrochemical media of artificial saliva and fluoridated artificial saliva （0.1%fluoride ions, F-） at 37 °C. Fluoride is commonly included in toothpastes, odontological gels and dental rinses to prevent dental caries and relieve dental sensitivity. The passive behaviour for all the titanium samples is observed for both solutions. The Ti60Ta alloy appears to possess superior corrosion resistance than the Ti12Mo and Cp-Ti in both electrochemical media.

关键词： Ti12Mo Ti60Ta Cp-Ti open-circuit potential potentiodynamic polarization electrochemical impedance spectroscopy

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