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1.
制备了以3-((4,6-二甲基-2-嘧啶基)硫代)-丙酸(HL)和菲咯啉(Phen)为配体的2个三元稀土配合物[Eu(L)3(Phen)]2·2H2O(1)和[Tb(L)3(Phen)]2·2H2O(2),并对其结构进行了表征。单晶X射线衍射分析表明它们是同构的。2个稀土离子(Ln)由4个羧酸配体桥接,形成二聚体排列。其余2个羧酸配体和Phen以双齿螯合方式与Ln配位。Ln的配位数为9,具有扭曲的单端方形反棱柱配位多面体构型。固态光致发光测试表明,这2种配合物都显示了金属中心的特征发射带。 相似文献
2.
制备了以3-((4,6-二甲基-2-嘧啶基)硫代)-丙酸(HL)和菲咯啉(Phen)为配体的2个三元稀土配合物[Eu(L)3(Phen)]2·2H2O(1)和[Tb(L)3(Phen)]2·2H2O(2),并对其结构进行了表征。单晶X射线衍射分析表明它们是同构的。2个稀土离子(Ln)由4个羧酸配体桥接,形成二聚体排列。其余2个羧酸配体和Phen以双齿螯合方式与Ln配位。Ln的配位数为9,具有扭曲的单端方形反棱柱配位多面体构型。固态光致发光测试表明,这2种配合物都显示了金属中心的特征发射带。 相似文献
3.
由水热法合成了2个微孔镧系超分子配合物[Ln(CCA)(OH)(phen)(H2O)]n·n(phen)·nH2O(Ln=Yb,1;Er,2;H2CCA=2-羧基肉桂酸;phen=1,10-菲啰啉),并用元素分析、IR及X-射线单晶衍射对其进行了表征。晶体结构研究表明,2个配合物都是由配体2-羧基肉桂酸连接而形成的一维双链结构,该链状结构通过氢键和π-π堆积作用扩展为具有微孔结构的超分子。1,10-菲啰啉在微孔结构的形成过程中起到了模板剂的作用。 相似文献
4.
《Journal of Coordination Chemistry》2012,65(3):424-430
Four 2-D coordination polymers Ln2(phen)2(C5H6O4)3 [Ln?=?Pr(1), Eu(2), Er(3), Yb(4), phen?=?1,10-phenanthroline] were obtained via hydrothermal reactions and determined by X-ray diffraction analysis. The crystal structure data reveal that these complexes are isostructural. In the asymmetric unit, the two Ln(III) ions are nine-coordinate and have similar coordination environments. The Ln(III) ions are built into 2-D layers by three different coordination modes of glutarate. The resulting 2-D layer forms 3-D supramolecular architecture by two types of π···π stacking interactions. All the complexes were characterized by IR spectra and thermogravimetric analysis, and the emission spectrum shows that Eu2(phen)2(C5H6O4)3 possesses strong luminescence. 相似文献
5.
O. V. Konnik V. F. Shul’gin S. V. Abkhairova S. B. Meshkova E. B. Rusanov V. V. Minin 《Russian Journal of Coordination Chemistry》2014,40(1):28-33
Complexes of the general formula LnL3 · Phen (Ln = Nd, Sm, Eu, Gd, Tb, Dy, and Yb; HL = 4-formyl-3-methyl-1-phenylpyrazol-5-one, Phen = 1,10-phenanthroline) were obtained and examined by IR spectroscopy and thermogravimetry. The structure of the complex TbL3 · Phen was studied by X-ray diffraction. The coordination polyhedron of terbium is a distorted square antiprism made up of six O atoms of three 4-formylpyrazol-5-one anions and two N atoms of the 1,10-phenanthroline molecule. Polycrystalline samples of the complexes studied show emission in the spectral ranges characteristic of Ln(III). 相似文献
6.
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
7.
I. V. Kalinovskaya I. A. Tkachenko A. G. Mirochnik V. E. Karasev V. Ya. Kavun 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(8):1452-1454
The luminescence and magnetic properties of mixed-ligand europium trifluoroacetates with nitrogen- and phosphorus-containing
neutral ligands [Eu(TFA)3 · 3H2O]2 and Eu(TFA)3 · 2D · nH2O were studied (here TFA is the trifluoroacetic acid anion, and D is Phen (1,10-phenanthroline), n = 1; DMF (dimethylformamide), n = 1; or TPPO (triphenylphosphine oxide), n = 3). The molar magnetic susceptibility increased in the series of complex compounds Eu(TFA)3 · 2Phen · H2O < [Eu(TFA)3 · 3H2O]2 < Eu(TFA)3 · 2DMF · H2O < Eu(TFA)3 · 2TPPO · 3H2O. Correlations were found between the luminescent and magnetic characteristics of the complex compounds. 相似文献
8.
《Journal of Coordination Chemistry》2012,65(4):625-633
Three lanthanide coordination polymers, [Ln4(BDC)6(H2O)2] n (Ln = Er, 1; Ln = Tm, 2; BDC = 1,2-benzenedicarboxylate) and {[Nd2(BDC)(EDTA)(H2O)2] · 1.5H2O} n , 3, were prepared by hydrothermal synthesis and characterized by elemental analysis, IR spectra, as well as single-crystal X-ray diffraction. The isostructural coordination polymers 1 and 2 exhibit four different coordination modes, which are rarely found in one lanthanide complex. Complex 3 displays a 2-D wave-like network assembled by two polycarboxylate ligands. 相似文献
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10.
《Journal of Coordination Chemistry》2012,65(6):995-1005
Two complexes constructed from aromatic acid and N-heterocyclic ligands have been synthesized by hydrothermal reaction: [Pb(cipt)(NDC)]n (1) [cipt?=?2-(3-chlorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline, NDC?=?naphthalene-1,4-dicarboxylic acid] and [Pb(ipm)(BDC)2]n (2) [BDC?=?terephthalic acid, ipm?=?5-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)-2-methoxyphenol]. Single-crystal X-ray analysis shows that 1 exhibits an interesting arm-shaped chain structure. 1-D ladder chain structure is formed by N–H···O bonding interactions and further into a 2-D network by N–H···O hydrogen bonds and interchain π–π stacking interactions. Complex 2 shows a 2-D butterfly wings structure, which has been rarely reported. The structure in 2 has intermolecular N–H···O interactions, which help in construction of the 3-D framework. In 1, the coordination sphere of Pb(II) is hemi-directed, whereas the Pb(II) geometry in 2 is holo-directed. The solid-state fluorescence spectra of 1 and 2 are also investigated, as well as the ligands cipt and ipm. 相似文献
11.
《Journal of Coordination Chemistry》2012,65(17):2725-2734
Reactions of Ln(ClO4)3?·?6H2O (Ln=La(III), Eu(III), Nd(III)), 1,10-phenanthroline (phen) and phenoxyacetic acid (PA) or 2,4-dichlorophenoxyacetic acid (2,4-D) yield [La(PA)2 (phen)2]2(ClO4)2 (1), [Eu(2,4-D)2(phen)2]2(ClO4)2 (2) and [Nd(2,4-D)3(C2H5OH)] n (3). Compounds 1–3 are characterized by elemental analyses, IR, UV–Vis, ESI-MS spectra and TGA. 1 is also characterized by 1H and 13C NMR. Single crystal X-ray diffraction analyses reveal that 1 and 2 are binuclear, and 3 has a one-dimensional polymeric structure. The La(III), Eu(III) and Nd(III) are nine-coordinate with a distorted tricapped trigonal-prism geometry. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(9):1547-1559
AbstractCoordination polymers (CPs) of mixed-ligand lanthanide complexes [Ln2(1,3-pdta)(TPA)(H2O)2]n·nH2O [Ln?=?La, 1; Ce, 2; Pr, 3; Nd, 4] (1,3-H4pdta = 1,3-propanediaminetetraacetic acid; H2TPA?= terephthalic acid) were hydrothermally synthesized with flexible 1,3-pdta and rigid TPA ligands. Moreover, lanthanide propanediaminetetraacetates [Ln(1,3-Hpdta)(H2O)]2n·nH2TPA·xH2O [Ln?=?Sm, 5; Gd, 6] with multi-layered structures were also obtained. In 1–4, both 1,3-pdta and TPA coordinate with lanthanide ions through carboxyl oxygen and nitrogen atoms. In 5 and 6, only 1,3-Hpdta coordinates with the central lanthanide ion, where one nitrogen atom in 1,3-Hpdta is protonated, and TPAs are crystallized as H2TPA with the central multi-layered structures of [Ln(1,3-Hpdta)(H2O)]2n through very strong hydrogen bonds [2.504(4) Å]. Solid-state 13C NMR analysis of 1 revealed the coordination of carboxyl groups. However, the methylene groups of 1,3-pdta showed an obvious upfield shift, which can be attributed to the effects of the phenyl ring in TPA ligand. The successful synthesis of these mixed-ligand lanthanides provides a rational design of such lanthanide CPs with flexible and rigid ligands. 相似文献
13.
The syntheses and magnetic properties of a series of heterospin [LnIIICuII 4] pentanuclear complexes
《Journal of Coordination Chemistry》2012,65(7):1134-1142
Twelve oxamide-bridged Ln(III)–Cu(II) heteropentanuclear complexes Ln[Cu(PMoxd)]4(ClO4)3 · 5H2O (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, and PMoxd = the N,N′-Bi(α-pyridylmethyl)-oxamide dianion) and 12 oxamide-bridged Ln(III)–Cu(II) heteropentanuclear complexes with the formula of Ln[Cu(PEoxd)]4(ClO4)3 · 5H2O (PEoxd = the N,N′-Bi(α-pyridylethyl)-oxamide dianion) were synthesized and characterized. The magnetic properties of Gd[Cu(PMoxd)]4(ClO4)3 · 5H2O (7) and Gd[Cu(PEoxd)]4(ClO4)3 · 2H2O (19) show that there are ferromagnetic interactions between Gd(III) and Cu(II) in the complexes with J Cu–Gd = 1.38 cm?1 and J Cu–Gd = 1.00 cm?1, respectively. Fluorescent quenching phenomena for Eu[Cu(PMoxd)]4(ClO4)3 · 5H2O (6) and Tb[Cu(PMoxd)]4(ClO4)3 · 5H2O (8) were also observed. 相似文献
14.
由水热法合成了2个微孔镧系超分子配合物[Ln(CCA)(OH)(phen)(H2O)]n·n(phen)·nH2O(Ln=Yb, 1;Er, 2;H2CCA=2-羧基肉桂酸;phen=1, 10-菲啰啉), 并用元素分析、IR及X-射线单晶衍射对其进行了表征。晶体结构研究表明, 2个配合物都是由配体2-羧基肉桂酸连接而形成的一维双链结构, 该链状结构通过氢键和π-π堆积作用扩展为具有微孔结构的超分子。1, 10-菲啰啉在微孔结构的形成过程中起到了模板剂的作用。 相似文献
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17.
Dr. Dmitry M. Lyubov Tatyana V. Mahrova Anton V. Cherkasov Prof. Georgy K. Fukin Prof. Yury V. Fedorov Prof. Alexander A. Trifonov 《欧洲无机化学杂志》2023,26(25):e202300292
We report the synthesis of Ln3+ nitrate [Ln(Tpm)(NO3)3] ⋅ MeCN (Ln=Yb ( 1Yb ), Eu ( 1Eu )) and chloride [Yb(Tpm)Cl3] ⋅ 2MeCN ( 2Yb ), [Eu(Tpm)Cl2(μ-Cl)]2 ( 2Eu ) complexes coordinated by neutral tripodal tris(3,5-dimethylpyrazolyl)methane (Tpm). The crystal structures of 1Ln and 2Ln were established by single crystal X-ray diffraction, while for 1Yb high resolution experiment was performed. Nitrate complexes 1Ln are isomorphous and both adopt mononuclear structure. Chloride 2Yb is monomeric, while Eu3+ analogue 2Eu adopts a binuclear structure due to two μ2-bridging chloride ligands. The typical lanthanide luminescence was observed for europium complexes ( 1Eu and 2Eu ) as well as for terbium and dysprosium analogues ([Ln(Tpm)(NO3)3] ⋅ MeCN, Ln=Tb ( 1Tb ), Dy ( 1Dy ); [Ln(Tpm)Cl3] ⋅ 2MeCN, Ln=Tb ( 2Tb ), Dy ( 2Dy )). 相似文献
18.
《Journal of Coordination Chemistry》2012,65(5):797-807
Two new complexes {[Eu(2, 4-DFBA)3 · (H2O)2] · H2O} n (1) and [Eu(2-BrBA)3 · H2O] n (2) (2, 4-DFBA = 2, 4-difluorobenzoate, 2-BrBA = 2-bromobenzoate) have been synthesized and characterized by single crystal X-ray diffraction. 1 has a 1-D chain structure, in which Eu(III) ions are bridged by single COO? groups and a 2-D supramolecular network is formed by hydrogen bond interactions. In 1, each Eu(III) is eight-coordinate with six oxygens from four 2,4-DFBA ligands and two waters. 2 has a 1-D chain structure, in which Eu(III) ions are bridged by bridging-chelating-bridging COO? groups. In 2, each Eu(III) ion is nine-coordinate with eight oxygens from five 2-BrBA ligands and one water. The two complexes exhibit intense luminescence at room temperature. The 5D0 → 7F j (j = 0–4) transition emissions of Eu(III) have been observed. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(11):1720-1729
Two new coordination polymers, {Ln2(hqda)3(H2O)4·6H2O}n (H2hqda = hydroquinone-O,O′-diacetic acid, Ln = Dy, 1; Ho, 2), were prepared and characterized by elemental analysis, IR spectroscopy, TG-DTA, fluorescence spectroscopy, and single-crystal X-ray diffraction. The two complexes are isomorphous with similar crystal structures. In 1 and 2, each Ln(III) ion is nine coordinate with seven oxygen atoms from hqda ligands and two oxygen atoms from water molecules. Two adjacent Ln(III) ions are bridged by–COO? groups from hqda ligands in bidentate-bridging and chelating-bridging modes. These building blocks cross link through –OOCCH2OC6H4OCH2COO? spacers to form a 2–D network structure. The adjacent 2-D layers are further interlinked by hydrogen bonds to form a 3-D supermolecular structure. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(17):2755-2763
We have synthesized four coordination polymers with two different nitrogen containing organic ligands and different lanthanide metal ions, under hydrothermal condition. [{Ln2(bpdc)3(H2O)2}] n (Ln = Dy (1), Sm (2)) (bpdc = 2,2-bipyridine-3,3-dicarboxylic acid) are isostructural, with 2-D supramolecular layer structure composed from 1-D chains. Like 1 and 2, [{Ln(pzda)2(H2O)2} · 4H2O] n (Ln = Dy (3), Nd (4)) (pzda = pyrazine-2,6-dicarboxylic acid) are also isostructural with 1-D chain-like structures. The photoluminescence of 2 is studied. 相似文献