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1.
Synthesis,Structure, and Fluorescent Properties of Lanthanide Complexes Based on 8‐Hydroxyquinoline‐7‐carboxylic Acid
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The lanthanide complex [Eu3(8‐HQCA)3(COOH)(OH)2(H2O)3]n · nH2O (8‐HQCA = 8‐hydroxyquinoline‐7‐carboxylic acid) was synthesized and characterized. Single‐crystal X‐ray diffraction shows that the trinuclear structures are linked by ligands to form 2D layers. The results of DFT calculation shows that energy can be transferred effectively from the ligand to EuIII ions. A series of heteronuclear complexes {[(Eu1–xYx)3(8‐HQCA)3(COOH) (OH)2(H2O)3]n · nH2O (x = 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8)} were synthesized and their luminescent properties were studied. The results showed that the doping of YIII ions could change the fluorescent intensity of the EuIII complex, but could not change their positions. 相似文献
2.
《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
3.
Three novel lanthanide coordination polymers {[Ce2(HOnic)4(Onic)2(H2O)2]·6H2O}n ( 1 ), {[Ln(HOnic)(Onic)‐ (H2O)5·(HOnicH)]·H2O}n [HOnicH=6‐hydroxynicotinic acid, Ln=Nd ( 2 ), Pr ( 3 )] have been synthesized and characterized by elemental analyses, IR spectrum and single crystal X‐ray diffraction. Structure analyses reveal that 1 features a 2D plane structure while compounds 2 and 3 possess a 1D chain‐like polymeric structure. TG analyses indicate that 1 exhibits higher thermostability than 2 and 3 , which was attributed to the layer polymeric structure of 1 . 相似文献
4.
B. Liu Y. Guo J. Wang L. J. Liu D. Wang L. Q. Zhang R. Xu X. D. Zhang 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(13):2225-2232
The interaction of BSA and FeIII complexes ([FeIII(gly)(H2O)4]2+, [FeIII(ida)(H2O)3]+, and [FeIII(nta)(H2O)2], gly—glyane, ida—iminodiacetic acid, nta—triglycolamic acid) as well as the sonocatalytic damage to BSA was studied by UV-vis
and fluorescence spectra. In addition, the influences of ultrasonic irradiation time and FeIII complex concentration were also examined on the sonocatalytic damage to BSA. The results showed that the fluorescence quenching
of BSA solution caused by the FeIII complexes belonged to the static quenching process. The BSA and FeIII complexes interacted with each other mainly through weak interaction and coordinate actions. The binding association constants
(K) and binding site numbers (n) were calculated. The results were as follows: K
1 = 0.5353 × 104 l mol−1 and n
1 = 0.9812 for [FeIII(gly)(H2O)4]2+, K
2 = 1.4285 × 104 l mol−1 and n
2 = 1.0899 for [FeIII(ida)(H2O)3, and K
3 = 0.4411 × 104 l mol−1 and n
3 = 0.9471 for [FeIII(nta)(H2O)2]. Otherwise, under ultrasonic irradiation the BSA were obviously damaged by the FeIII complexes. The damage degree rose up with the increase of ultrasonic irradiation time and FeIII complex concentration. And that, [FeIII(nta)(H2O)2] exhibited in a way higher sonocatalytic activity than [FeIII(gly)(H2O)4]2+ and [FeIII(ida)(H2O)3]+. 相似文献
5.
Yi‐Wen Chen Hai‐Xia Wei Xiu‐Guang Wang Prof. Dr. Dong‐Zhao Gao Ya‐Qiu Sun Guo‐Ying Zhang Yan‐Yan Xu 《无机化学与普通化学杂志》2012,638(9):1328-1334
Three new one‐dimensional (1D) chain metal–nitroxide complexes {[Cu(NIT4Py)2(suc)(H2O)] · 3H2O}n ( 1 ), {[Cd(NIT4Py)2(suc)(H2O)] · [Cd(NIT4Py)2(suc)(H2O)2] · 3H2O}n ( 2 ), and {[Zn(NIT4Py)(glu)(H2O)] · H2O}n ( 3 ) [NIT4Py = 2‐(4′‐pyridyl)‐4, 4, 5, 5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide, suc = succinate anion and glu = glutarate anion] were synthesized and structurally characterized. Single‐crystal X‐ray analyses indicate that the three complexes crystallize in neutral 1D chains in which the metal‐nitroxide units are linked by flexible dicarboxylate anions. The succinate anions only adopt trans configuration in complexes 1 and 2 , whereas the glutarate anion has gauche/anti conformation in complex 3 . Magnetic measurements show that complex 1 exhibits weak antiferromagnetic interactions between the copper ions and the nitroxides. 相似文献
6.
《无机化学与普通化学杂志》2018,644(11):504-511
The coordination polymers (CPs), [Ni(L)(H2O)4]n ( 1 ), [Co(HL)2(H2O)2]n ( 2 ), {[Cu(L)(H2O)3] · H2O}n ( 3 ), [Mn(L)(H2O)2]n ( 4 ), [Cd(L)(H2O)2]n ( 5 ), and {[Zn2(L)2] · H2O}n ( 6 ), were solvothermally synthesized by employing the imidazol‐carboxyl bifunctional ligand 4‐(1H‐imidazol‐1‐yl) phthalic acid (H2L). Single‐crystal X‐ray diffraction indicated that the L2–/HL– ligands display various coordination modes with different metal ions in 1 – 6 . Complexes 1 and 2 show one‐dimensional (1D) chain structures, whereas complexes 3 – 6 show 2D layered structures. The magnetic properties of these complexes were investigated. Complexes 1 and 3 indicate weak ferromagnetic interactions, whereas complexes 2 and 4 demonstrate antiferromagnetic interactions. In addition, luminescence properties of 5 and 6 were measured and studied in detail. 相似文献
7.
Four 3D lanthanide organic frameworks from potassium pyrazine‐2, 3, 5, 6‐tetracarboxylate (K4pztc) or potassium pyridine‐2, 3, 5, 6‐tetracarboxylate (K4pdtc), namely, {[KEu(pztc)(H2O)2] · H2O}n ( 1 ), {[KTb(pztc)(H2O)2] · 1.25H2O}n ( 2 ), {[KLn(pdtc)(H2O)] · H2O}n [Ln = Gd ( 3 ), Ho ( 4 )], were synthesized by reaction of the corresponding lanthanide oxides with K4pztc or K4pdtc in presence of HCl under hydrothermal conditions, and characterized by elemental analysis, TGA, IR and fluorescence spectroscopy as well as X‐ray diffraction. In complexes 1 and 2 , the dodecadentate chelator pztc4– links four LnIII ions and four KI ions. The coordination mode of the pztc4– ligand is reported for the first time herein. Complexes 3 and 4 are isostructural with earlier reported Nd, Dy, Er complexes. Moreover, the EuIII and TbIII complexes exhibit the characteristic luminescence. 相似文献
8.
Three new complexes constructed by 1‐adamantaneacetic acid (HL), [Zn2L4]n ( 1 ), [MnL2(4,4′‐bipy)(H2O)2]n· 2n(HL) ( 2 ) and MnL2(2,2'‐bipy)(H2O)2 ( 3 ), have been hydrothermally synthesized. X‐ray single crystal diffraction analyses reveal that both 1 and 2 are infinite 1D chains along b axis. 2 and 3 have an octahedral coordination and show the supramolecular structures which are formed on the basis of the connectivity of intermolecular hydrogen bonds. The deprotonated L? ligands coordinate the M(II) atoms with many coordination modes in the title complexes. 相似文献
9.
Two new nickel(II) complexes, [Ni(4, 4′‐bpy)(H2O)4]n · n(cpp) · 0.5nH2O ( 1 ) and [Ni(cpp)(4, 4′‐bpy)(H2O)2]n ( 2 ) [4, 4′‐bpy = 4, 4′‐bipyridine, H2cpp = 3‐(4‐carboxyphenyl)propionic acid] were synthesized and characterized by single‐crystal X‐ray diffraction, elemental analysis, IR spectroscopy, and thermal analysis. In complex 1 , NiII ions are bridged by 4, 4′‐bpy into 1D chains, and cpp ligands are not involved in the coordination, whereas in complex 2 , cpp ligands adopt a bis(monodentate) mode and link NiII ions into 2D (4, 4) grids with the help of 4, 4′‐bpy ligands. Triple interpenetration occurs, which results in the formation of a complicated 3D network. The difference in the structures of the two complexes can be attributed to the different reaction temperatures and bases. 相似文献
10.
《无机化学与普通化学杂志》2018,644(5):301-307
Investigating the coordination chemistry of H2CDA (4‐oxo‐1,4‐dihydro‐2,6‐pyridinedicarboxylic acid) with rare earth salts Ln(NO3)3 under hydrothermal conditions, structure transformation phenomenon was observed. The ligand, H2CDA charged to its position isomer, enol type structure, H3CAM (4‐hydroxypyridine‐2,6‐dicarboxylic acid). Six new lanthanide(III) coordination polymers with the formulas [Ln(CAM)(H2O)3]n [Ln = La ( 1 ), Pr, ( 2 )] and {[Ln(CAM)(H2O)3] · H2O}n [Ln = Nd, ( 3 ), Sm, ( 4 ), Eu, ( 5 ), Y, ( 6 )] were synthesized and characterized. The X‐ray structure analyses show two kinds of coordination structures. The complexes 1 and 2 and 3 – 6 are isostructural. Complexes 1 and 2 crystallize in the monoclinic C2/c space group, whereas 3 – 6 crystallize in the monoclinic system with space group P21/n. In the two kinds of structures, H3CAM displays two different coordination modes. The SmIII and EuIII complexes exhibit the corresponding characteristic luminescence in the visible region at an excitation of 376 nm. 相似文献
11.
A series of chiral two‐dimensional lanthanide coordination polymers, [Ln2(L)3(H2O)6]n·n/3H2O [Ln=Nd ( 1a , 1b ), Sm ( 2 ), Eu ( 3 ), Tb ( 4 ), Dy (5 ), Ho ( 6 ), Er ( 7 ); H2L=2,2‐dihydroxylmalonic acid], have been hydrothermally synthesized by using dihydroxyfumaric acid as a source of polydentate O‐donor ligands. The luminescence behaviors of 3 and 4 have been investigated, and they exhibit strong red and green fluorescence in the visible region respectively. 相似文献
12.
Novel Copper(II) Thiodibenzoic Acid Coordination Polymers by in situ Extrusion of Sulfur from 2,2′‐Dithiodibenzoic Acid and the Unique Oxidation of Disulfide to Sulfate
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Salma B. Moosun Lisa H. Blair Simon J. Coles Sabina J. Laulloo Minu G. Bhowon 《无机化学与普通化学杂志》2015,641(5):890-895
Slow diffusion reaction of 2,2′‐dithiodibenzoic acid (dtdb) with CuCl2 in the presence of N‐donor ligands results in the formation of different coordination polymers where both S–S and C–S scission and oxidation of S is observed. X‐ray diffraction analysis of [Cu(tdb)(phen)(H2O)]2 · 2H2O.2DMF] ( 1 ), [Cu(tdb)(py)2(H2O)]2 ( 3 ), and [Cu(tdb)(bipy)(H2O)]2 · 0.5H2O ( 4 ) (tdb = thiodibenzoic acid, phen = phenanthroline, py = pyridine, bipy = 2,2′‐bipyridine) show that the metal ions are coordinated to the carboxylate oxygen atoms of the in situ generated tdb ligand in a monodenate fashion. In [Cu(phen)(SO4)2(H2O)2]n ( 2 ) and [Cu(bipy)(SO4)2(H2O)2]n ( 5 ), the sulfur is oxidized to sulfate ions prior to coordination with the metal. Complex 1 has a dimeric structure with π–π interactions between the phen ligands, whereas 3 and 4 form 1D polymeric chains. 相似文献
13.
Two new isostructural lanthanide metal‐organic frameworks were synthesized using lanthanide oxides and 3,3,4,4‐benzophenonetetracarboxylic acid (H4BPTC), namely, [Ln(BPTC)(H2O)2.5] [Ln = Eu ( 1 ), Gd ( 2 )] under hydrothermal conditions. 1 and 2 revealed porous three‐dimensional structures, possessing a binodal 4, 8‐connected flu network defined by dinuclear building units. 1 and 2 were characterized by powder X‐ray diffraction (PXRD), thermogravimetric analysis (TG), infrared radiation (IR), and photoluminescence (PL) spectra. Furthermore, 1 exhibits red‐light emission under UV light irradiation and the sharp light can be easily observed by naked eyes. 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
15.
Five new transition metal complexes [Cu(HL)2(H2O)2] ( 1 ), [Cu(HL)2(phen)] ( 2 ), [Cu(HL)2(H2O)]2(4,4′‐bipy) ( 3 ), [Zn(HL)2(H2O)2]·(4,4′‐bipy) ( 4 ), [Ag(HL)(4,4′‐bipy)]n ( 5 ), (H2L=5‐chloro‐1‐phenyl‐1H‐pyrazole‐3,4‐dicarboxylic acid, phen=1,10‐phenanthroline; 4,4′‐bipy=4,4′‐bipyridine) have been synthesized and characterized. Complexes 1 , 2 and 4 exhibit monomeric structures, 3 shows a dinuclear structure, 5 displays 1D chain structure, and all extend to 3D supramolecular network via rich hydrogen bonds. Complexes 1 , 2 , 3 , 5 comprise single helical chains, while complex 4 generates quadruple‐stranded helical chains. Furthermore, the antibacterial activities of the titled complexes against bacterial species, three Gram positive bacteria (Staphylococcus aureus, Bacillus subtilis and Candida albicans) and two Gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa) were studied and compared to the activities of free ligands by using the microdilution method. 相似文献
16.
嘧啶衍生物乳清酸作为一种生物小分子较少应用到金属-有机配合物的合成中。我们应用乳清酸与过渡金属盐反应,通过溶剂热方法合成了3个新颖的配合物:{[Cu(HOr)2]·2NH2(CH3)2}n(R-1)、[Co2(HOr)2(bipy)(H2O)6]·2H2O(R-2)和{[Ni2(HOr)2(1,3-dpp)2(H2O)2][Ni(HOr)(1,3-dpp)(H2O)]2·(1,3-dpp)·2H2O}n(R-3)(H3Or=orotic acid,bipy=4,4''-bipyridine,1,3-dpp=1,3-di(4-pyridyl)propane)。应用X射线单晶衍射、元素分析、红外衍射、热重分析等对配合物进行了结构分析和表征。X射线单晶衍射分析表明:R-1是具有2D层结构的单核配合物,R-2为简单的单分子配合物,R-3则是由层和链组成的复杂三明治结构。这3个配合物均能通过分子间的氢键作用连接成三维的框架结构。 相似文献
17.
Synthesis,Structures, and Luminescent Properties of Three Alkaline Earth Metal‐based MOFs Assembled from 3‐(3‐Carboxyphenoxy) Phthalic Acid Ligand
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Three two‐dimensional (2D) coordination complexes, namely [Ca2(HL)2(H2O)5]n · 2nH2O ( 1 ), [Sr(HL)(H2O)3]n · nH2O ( 2 ), and [Ba(HL)(H2O)3]n · nH2O ( 3 ) [H3L = 3‐(3‐carboxy‐phenoxy) phthalic acid], were synthesized by using the ligand H3L and alkaline earth metals. Structural analysis reveals that the structures of complexes 1 – 3 can be described as 2D networks with the point (Schälfli) symbol for net: {312 · 414 · 52} topology. Additionally, the thermal stability and solid‐state luminescent properties of compounds 1 – 3 were investigated at room temperature. The quantum yield (QY) of compound 2 is 10.75 %, which is much higher than the QY of the free H3L ligand (QYH3L < 1 %). 相似文献
18.
Prof. Dr. Ji‐Jiang Wang Jun‐Fang Lv Pei‐Xiang Cao Prof. Dr. Mei‐Li Zhang Lou‐Jun Gao Lei Lv Yi‐Xia Ren Xiang‐Yang Hou 《无机化学与普通化学杂志》2011,637(11):1585-1589
Two new coordination polymers, {[Cd2(btc)(2,2′‐bpy)2] · H2O}n ( 1 ) and [Zn2(btc)(2,2′‐bpy)(H2O)]n ( 2 ) (H4btc = biphenyl‐2,2′,4,4′‐tetracarboxylic acid, 2,2′‐bpy = 2,2′‐bipyridine), were synthesized hydrothermally under similar conditions and characterized by elemental analysis, IR spectra, TGA, and single‐crystal X‐ray diffraction analysis. In complexes 1 and 2 , the (btc)4– ligand acts as connectors to link metal ions to give a 2D bilayer network of 1 and a 3D metal‐organic framework of 2 , respectively. The differences in the structures are induced by diverging coordination modes of the (btc)4– ligand, which can be attributed to the difference metal ions in sizes. The results indicate that metal ions have significant effects on the formation and structures of the final complexes. Additionally, the fluorescent properties of the two complexes were also studied in the solid state at room temperature. 相似文献
19.
Ling‐Zhi Zhao Yuan‐Yuan Tian Ying‐Xin Gong Xiao‐Ting Huang Fen Zhang Jian‐Xiong Rong Xia Cai Wen‐Tao Li Rong‐Hua Zeng Dong‐Sheng Lu 《无机化学与普通化学杂志》2014,640(1):147-152
Two 2D 4d‐4f heterometallic coordination polymers, [LnAg(Py26DC)2(H2O)3] · 3H2O [Ln = Nd ( 1 ), La ( 2 ); H2Py26DC = pyridine‐2,6‐dicarboxylic acid], and one 2D lanthanide homometallic coordination polymer, [Ln(Py25DC)(ox)0.5(H2O)2] [Ln = Tm ( 3 ); H2Py25DC = pyridine‐2,5‐dicarboxylic acid; ox = oxalate], were synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, and single‐crystal X‐ray diffraction analysis. Both complexes 1 and 2 are isostructural and exhibit 3‐connected 2D heterometallic layer structures with the Schläfli symbol of (82 · 10), whereas complex 3 represents an extended 2D homometallic network structure with (4,4) topology. 相似文献
20.
One new 3D La‐Ag coordination compound formulated as [La2Ag3(IN)6(OAC)(H2O)3][NO3]2 · 2H2O ( 1 ) (HIN = isonicotinic acid; HOAC = acetic acid) was synthesized. The structure represents an interesting 3D open framework that is built upon 2D lanthanide layers and [Ag(IN)2]+ linkers. The triple helical [La(IN)2(H2O)]n chain and zigzag [LaIN(OAC)]n chain are found in the 2D La‐IN layers. Channels are also found in the framework of 1 , owing to shape‐controlled synthesis templated by the free NO3– ions and water molecules. 相似文献