http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Jaglicic, Z. (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Safaei, E.,Naghdi, N.,Jaglicic, Z.,Pevec, A.,Lee, Y.I. Pergamon Press 2017 Polyhedron Vol.122 No.-
<P>An ethylene diamine derivative of a bis(phenol)diamine ligand (H2L) was synthesized via the Mannich reaction and subsequent ring cleavage of the produced imidazoline ring (H2LIm), and then it was characterized by H-1 NMR and IR spectroscopies and CHN analysis. The iron(III) complex (FeLCI) of this ligand was synthesized and characterized by IR, UV-Vis, X-ray and magnetic susceptibility studies. X-ray analysis reveals that in FeLCl the iron(III) center has a distorted square pyramidal coordination sphere and is surrounded by a chlorine atom, two amine nitrogen and two phenolate oxygen atoms of the ligand. Variable-temperature magnetic susceptibility measurements indicate that FeLCI is a paramagnetic high spin iron(III) complex. It shows weak antiferromagnetic interactions through N-H center dot center dot center dot Cl intermolecular interactions. The ligand-centered electrochemical oxidation of this complex, due to the oxidation of phenolate group to phenoxyl radicals, as well as the electrochemical metal-centered reduction of the ferric ion to the ferrous ion were investigated. In addition, the efficient cleavage by oxygenation of 3,5-di-tertbutyl-catechol with FeLCI in the presence of dioxygen was observed. (C) 2016 Elsevier Ltd. All rights reserved.</P>
-
Hassan Hajifatheali,Ebrahim Ahmadi,Andrzej Wojtczak,Zvonko Jaglicic 한국고분자학회 2015 Macromolecular Research Vol.23 No.11
This study is a report on atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) using a ligand, N-methylbis[2-(dodecylthio)ethyl]amine (SNS), which is tridentate ligand with mixed donor atoms. This ligand was synthesized in a simple way and at a low cost and was used to prepare a Cu catalyst complex (Cu/ SNS) during the process of polymerization. The effects of various factors such as different molar ratios (100, 300, and 700 [monomer]:[initiator]) and cuprous halides (Br and Cl) on the polymerization of this ligand were investigated. The resulting catalyst complex mediated a living polymerization of MMA, yielding polymers with controlled molecular weights and narrow molecular weight distributions (1.09 < PDI < 1.4). The Highest PDI values were observed in the polymerization of the 700 molar ratio. The ligand, catalyst crystals formed at the end of polymerization, and synthesized polymers were characterized via UV-VIS, FTIR, CV, NMR, and GPC spectroscopy and single crystal X-ray crystallography as appropriate. The X-ray results for catalyst crystals showed that the catalyst was the deactivator (CuII Br2/SNS) of the ATRP equation and existed as a mononuclear catalyst complex.
-
Ultrasmall iron oxide nanoparticles: Magnetic and NMR relaxometric properties
Branka Babic-Stojic,Vukoman Jokanovic,Dusan Milivojevic,Miroslav Pozek,Zvonko Jaglicic,Darko Makovec,Natasa Jovic Orsini,Mirjana Markovic,Katarina Arsikin,Verica Paunovic 한국물리학회 2018 Current Applied Physics Vol.18 No.2
Ultrasmall iron oxide (USPIO) nanoparticles, with diameter mostly less than 3 nm dispersed in an organic carrier fluid were synthesized by polyol route. The evolution of ZFC-FC magnetization curves with temperature, as well as the shift of the ac susceptibility peaks upon changing the frequency, reveal that the nanoparticles in the fluid are non-interacting and superparamagnetic with the blocking temperature TB ~10 K. The M€ossbauer spectra analysis proposed the core/shell structure of the nanoparticles consisting of stoichiometric g-Fe2O3 core and non-stoichiometric shell. The nanoparticle surface layer has a great influence on their properties which is principally manifested in significant reduction of the magnetization and in a large increase in magnetic anisotropy. Magnetic moments do not saturate in fields up to 5 T, even at the lowest measured temperature, T ¼ 5 K. The average magnetic particle diameter is changed from 1.3 to 1.8 nm with increasing magnetic field from 0 to 5 T which is noticeably smaller than the particle sizes measured by TEM. The estimated effective magnetic anisotropy constant value, Keff ¼ 2 105 J/m3, is two orders of magnitude higher than in the bulk maghemite. Measurements of the longitudinal and transverse NMR relaxivity parameters on water diluted nanoparticle dispersions at 1.5 T gave the values r1 ¼ 0.028 mmol1 s1, r2 ¼ 0.050 mmol1 s1 and their ratio r2/r1 ¼ 1.8. Continuous increase of the T1-weighted MRI signal intensity with increasing Fe concentration in the nanoparticle dispersions was observed which makes this ferrofluid to behave as a positive T1 contrast agent.
-
Safaei, E.,Hajikhanmirzaei, L.,Alavi, S.,Lee, Y.I.,Wojtczak, A.,Jaglicic, Z. Pergamon Press 2016 Polyhedron Vol.118 No.-
<P>Two mononuclear manganese(III) complexes of bis(phenol) diamine ligands (H2LNEX) and 2,3,4,5-tetrabromocatechol (TBC), MnLNEX(TBC), were synthesized as models for enzyme-catechol adducts of the intradiol Fe-dependent catechol dioxygenases. X-ray analysis of the complexes has revealed that the manganese center in the model compounds has a distorted octahedral coordination sphere and is surrounded by the L-NEX ligand and two oxygen atoms of TBC. The phenolate moieties of MnLNEX(TBC) were electrochemically oxidized to phenoxyl radicals. Consistent with the electrochemical results, quantum chemical calculations showed that the HOMO and LUMO levels on both complexes are on the phenolate moieties. The paramagnetic properties of the manganese(III) center of the complexes have been investigated by magnetic susceptibility measurements. H2LNEX/MnCl2 showed quite good enzyme-mimicking reactivity. It utilized molecular oxygen in carrying out the cleavage of di-tert-butyl catechol at room temperature. To the best of our knowledge this is the second report where a manganese complex can perform oxygenase and not oxidase activity. (C) 2016 Elsevier Ltd. All rights reserved.</P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
