共查询到19条相似文献,搜索用时 187 毫秒
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稀土—邻菲罗啉—氟尿嘧啶三元配合物的合成及表征 总被引:4,自引:0,他引:4
合成了七种稀土硝酸盐-邻菲罗啉-氟尿嘧啶的三元固体配合物。分子进行了元素分析,摩尔电导率的测定和红外光谱,热重,差热分析的研究,确证配合物的化学式「Ln(phen)2(Fu)(NO3)」(NO3)2(Ln=Y,La,Ce,Nd,Sm,Gd,No)。此外,对La的三元配合物进行了^12C核磁共振谱的测定,并通过体外癌细胞瘤株抑制率的试验,表明配合物有明显的抗肿瘤效果。 相似文献
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合成了三个稀土-二笨甲酰甲烷-三辛基氧化膦三元配合物Ln(DBM)_3·TOPO(Ln=Y、Eu、Er)。用红外光谱、紫外光谱及差热—热重谱对其进行了表征,同时还研究了Eu(DBM)_3·H_2O(A)和Eu(DBM)_3·TOPO(B)在固态下及CHCl_3溶液中的荧光光谱和荧光寿命,结果表明在CHCl_3溶液中,B的荧光强度为A的48倍,其荧光寿命分别为(149±10)μs和(86±10)μs。另外对这些化合物在空气/水界面的单分子膜行为也进行了研究。 相似文献
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稀土组氨酸配合物的合成和性质研究 总被引:1,自引:0,他引:1
本文合成了十二个稀土与L-组氨酸(L-His)的固体配合物,元素分析结果表明配合物的组成为Ln(His)3(NO3)32H2O(Ln=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Er,Tm)。并通过配合物的IR、UV、H-NMR、TG-DTA、磁化率及在水中的摩尔电导等的研究,表征了这些配合物的物理化学性质,结果表明稀土组氨配合物中配体通过羟基氧原子与镧系离子配位。 相似文献
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D—葡萄糖与氯化稀土配合物的合成及红外光谱研究 总被引:4,自引:0,他引:4
以非水溶剂为介质合成了D-葡萄糖,氯化稀土,吡啶的混配多元配合物,并进行了元素分析和红外光谱测定。研究结果表明,D-葡萄糖和溶剂吡啶同时参与了配位,该配合物的组成为:Ln(C6H12O6)(C5H5N)Cl3(Ln=La,Ce,Pr,Nd,Sm等)。本文还对配合物的可能结构进行了讨论。 相似文献
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三价轻希土—PMBP—路易斯碱三元配合物的合成及其性质的研究 总被引:1,自引:2,他引:1
合成了1—苯基—3—甲基—4—苯甲酰基—吡唑啉酮—5(PMBP)和路易斯碱的三价轻希土三元配合物LnA_3·L(A=Pmbp~-;L=C_2H_5OH时,Ln=La、Pr、Sm、对Gd为GdA_3·(C_2H_5OH)_(0·25);L=Phen(邻菲罗啉)时,Ln=Pr-Gd,L=TBPO(三丁基氧化膦)时,Ln=La、Pr—Gd)。测定了它们的摩尔电导值、热谱、红外光谱、可见—紫外光谱、荧光光谱和质子核磁共振谱。观察到热稳定性次序为LnA_3·Phen>LnA_3·TBPO。从同类型配合物系列的热效应值、LnA_3·Phen型配合物的合成难易程度及其紫外最大吸收波长的移动可观察到镧系收缩现象。 相似文献
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希土离子-pmap-吡啶氧化物混配配合物的制备及性质研究 总被引:1,自引:0,他引:1
合成了Ce(pmap)_4·2H_2O(pmap=1苯基-3 甲基-4-乙酰基-吡唑酮-5);Ln(pmap)_3·2H_2O·xC_2H_5OH(Ln=La-Nd,x=1;Ln=Sm,Eu-Lu,x=0)以及Ln(pmap)_3·L·H_2O(Ln=La-Lu;L=pyno, 3picno,4picno)等固体配合物,并对它们进行了热谱、电导、红外和可见——紫外光谱等的测试工作。观察到镧系收缩;吡啶氧化物上甲基的取代位置对混配配合物热稳定性的影响;Pr~(3 ),Nd~(3 ),Ho~(3 ),Er~(3 )离子配合物在可见区有超灵敏跃迁现象;从XPS光谱知不同希土离子结合能的对数值与原子序数间有直线关系。 相似文献
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Yu. A. Bryleva T. E. Kokina L. A. Glinskaya E. M. Uskov M. I. Rakhmanova A. V. Alekseev S. V. Larionov 《Russian Journal of Coordination Chemistry》2012,38(11):687-695
Heteroligand complexes Ln(L)(iso-Bu2PS2)2(NO3) (Ln = Sm, Tb, Dy; L = Phen, 2,2??-Bipy) (I?CVI) are synthesized. The structure of Dy(Phen)(iso-Bu2PS2)2(NO3) (III) is determined from the data of X-ray structure analysis. The crystal structure of complex III is based on discrete mononuclear molecules in which the Dy atom has distorted dodecahedral coordination (polyhedron N2O2S4). The ligands Phen, iso-Bu2PS 2 ? and NO 3 ? are bidentate-cyclic. According to the X-ray diffraction analysis data, complexes I and II are isostructural to compound III. Complexes I?CVI have photoluminescence in the visible spectral range. The photoluminescence spectra of solid samples of compounds I?CVI exhibit bands corresponding to the radiative electron transitions of the Sm3+, Tb3+, and Dy3+ ions. Among the studied compounds I?CVI, the Tb(III) complexes are characterized by the most intense photoluminescence. 相似文献
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S. P. Chen S. L. Gao X. W. Yang Q. Z. Shi 《Russian Journal of Coordination Chemistry》2007,33(3):222-229
Thirteen solid ternary complexes Ln(Pdc)3(Phen) (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu;) have been synthesized in absolute ethanol by rare-earth
element chloride low hydrate reacting with the mixed ligands of ammonium pyrrolidinedithiocarbamate (APdc) and 1,10-phenanthroline
· H2O (o-Phen · H2O) in the ordinary laboratory atmosphere without any cautions against moisture or air sensitivity. IR spectra of the complexes
showed that the Ln3+ ion was coordinated with six sulfur atoms of three Pdc− and two nitrogen atoms of o-Phen · H2O. It was assumed that the coordination number of Ln3+ is eight. The constant-volume combustion energies of the complexes, Δc
U, were determined by a precise rotate-bomb calorimeter at 298.15 K. Their standard molar enthalpies of combustion, Δc
H
m
o
, and standard molar enthalpies of formation, Δf
H
m
o
were calculated.
The text was submitted by the authors in English. 相似文献
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I. V. Kalinovskaya V. V. Kon’shin V. E. Karasev E. N. Chernykh 《Russian Journal of Inorganic Chemistry》2011,56(2):273-275
The ligand substitution in Eu(AA)3 · Phen-CDCl3-TFA systems, where AA is acetylacetone, Phen is 1,10-phenanthroline, and TFA is trifluoroacetic acid was studied at various
molar ratios (m) of competing ligands (m = TFA/AA) using NMR (1H, 19F) and luminescence spectroscopy. The formation of mixed Eu(AA)2(TFA) · Phen and Eu(AA)(TFA)2 · Phen complexes in the resultant solutions was attested. The luminescence spectra were studied. The competitive capacity
of TFA was ascertained to be higher than that of AA. Depending on the m value, the substitution of acido ligands was shown to occur successively according equations Eu(AA)3 · Phen + (TFA)
n
= Eu(AA)3 − n
(TFA)
n
· Phen + (AA)
n
(n = 1, 2, 3). 相似文献
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Microwave synthesis and characterization of europium complexes with cinnamic acid and phenanthroline
We report here the synthesis and characterization of a host of Eu(Phen)L3 with cinnamic acid (C6H5CH = CHCOOH, HL) and phenanthroline (Phen), and employing microwave radiation, where the microwave radiation is used just
for the uniform heating of the reaction mixture. Its IR absorption spectra, scanning electron microscopy (SEM), and fluorescence
spectra were studied. The results show that the particles of Eu(Phen)L3 phosphors are basically spherical in shape, with good dispersing. The mean particle size is 1–2 μm. The excitation spectrum
is a broad band and the main peak is at 320.0 nm. Moreover, excitation peak at 396.0 nm was found in the excitation spectrum.
The emission spectrum shows that Eu(Phen)L3 has narrow emission peaks. The emission peaks are ascribed to Eu3+ ions transition from 5
D
J
(J = 0) to 7
F
J
(J = 1, 2, 4). However, the strongest main emission peak locates at 614.0 nm, which corresponds to the electric dipole transition
of Eu3+(5
D
0 → 7
F
2)
The article is published in the original. 相似文献
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Morito Komiya Yuuki Nishikido Yasuhiro Umebayashi Shin-ichi Ishiguro 《Journal of solution chemistry》2002,31(11):931-946
Formation thermodynamics of binary and ternary lanthanide(III) (Ln = La, Ce, Nd, Eu, Gd, Dy, Tm, Lu) complexes with 1,10-phenanthroline (phen) and the chloride ion have been studied by titration calorimetry and spectrophotometry in N,N-dimethyl-formamide (DMF) containing 0.2 mol-dm–3 (C2H5)4NClO4 as a constant ionic medium at 25°C. In the binary system with 1,10-phenanthroline, the Ln(phen)3+ complex is formed for all the lanthanide(III) ions examined. The reaction enthalpy and entropy values for the formation of Ln(phen)3+ decrease in the order La > Ce > Nd, then increase in the order Nd < Eu < Gd < Dy, and again decrease in the order Dy > Tm > Lu. The variation is explained in terms of the coordination structure of Ln(phen)3+ that changes from eight to seven coordination with decreasing ionic radius of the metal ion. In the ternary Ln3+-Cl–-phen system, the formation of LnCl(phen)2+, LnCl2(phen)+, and LnCl3(phen) was established for cerium(III), neodymium(III), and thulium(III), and their formation constants, enthalpies, and entropies were obtained. The enthalpy and entropy values are also discussed from the structural point of view. 相似文献
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The 1:1, 1:2 and 1:3 interactions of lanthanon (III) isopropoxide with monofunctional bidentate Schiff bases as salicylidene-o-toluidine (SOTH) and salicylidene-p-p-toluidine (SPTH) have been investigated. The resulting products Ln(OPr1)2(SB), Ln(OPr1)(SB)2 and Ln(SB)3 (where Ln=Pr, Nd and Sm and SB1? is the anion of the corresponding Schiff base) have been isolated in almost quantitative yields. The infrared spectra of these compounds have been recorded and plausible structures suggested. 相似文献
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Kalinovskaya I. V. Karasev V. E. Zadorozhnaya A. N. Lifar L. I. 《Russian Journal of Coordination Chemistry》2001,27(7):516-519
Europium and terbium mixed-ligand complexes with cinnamic acid of composition Ln(Cin)3· nD · xH2O, where Ln = Eu3+or Tb3+, Cin is a cinnamate ion (C6H5CH=CHCOO–), D = 1,10-phenantroline, 2,2"-dipyridyl, benzotriazole (n= 2, x= 0), triphenylphosphine oxide (n= 1, x= 2), or H2O (n= 0 or 1, x= 0), were synthesized. The compounds were characterized by elemental analysis, IR and luminescence spectroscopy. The Stark structure of the 5
D
0–7
F
j(j= 0, 1, 2) electronic transitions in the low-temperature luminescence spectra of europium complexes was analyzed. IR study has revealed a bidentate coordination of the cinnamate ion in the compounds. 相似文献