共查询到20条相似文献,搜索用时 31 毫秒
1.
《Journal of Coordination Chemistry》2012,65(18):3274-3286
Hydrothermal reactions of lanthanide chloride, phosphonoacetic acid (H2O3PCH2COOH), and water in the presence of HCl provide a series of lanthanide coordination polymers. FT-IR spectra confirm that there are three kinds of structures among seven complexes, {[Ln2(O3PCH2CO2)2(H2O)3]?·?H2O}∞ (type I) (Ln?=?LaIII for 1; PrIII for 2; NdIII for 3 and EuIII for 4), [Ln(O3PCH2CO2)(H2O)2]∞ (type II) (Ln?=?TbIII for 5), and [Ln(O3PCH2CO2)(H2O)2]∞ (type III) (Ln?=?HoIII for 6 and YbIII for 7). Complexes 1–5 show 2-D 4,4,5,5-connected (44?·?62)(45?·?6)(46?·?64)(48?·?62) topology networks and 2-D 4-connected (44?·?62) topology networks and then are further linked into 3-D supramolecular networks by hydrogen-bonding interactions; 6 and 7 both exhibit a 3-D 4-connected (42?·?63?·?8) topology with 1-D dumbbell-shaped channels. The results indicate infrared spectroscopy is in accord with the result of single-crystal X-ray analysis. 相似文献
2.
《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
3.
《Journal of Coordination Chemistry》2012,65(23):4185-4193
Five mixed-ligand coordination polymers, [Ln2(PTCP)2(m-BDC)3] n ?·?nH2O (Ln?=?Pr (1), Sm (2), Eu (3), Tb (4), Dy (5); m-BDC?=?1,3-benzenedicarboxylate; PTCP?=?2-phenyl-1H-1,3,7,8-tetraazacyclopenta[l]phenanthrene), were synthesized and characterized by IR spectra, elemental analyses, thermogravimetric analyses, single-crystal X-ray diffraction, and solid-state photoluminescent spectra. X-ray crystallographic analyses reveal that the five complexes are 1-D structures based on dinuclear [Ln2O12N4] units and further assembled into 3-D supramolecular networks by hydrogen bonds and π···π stacking interactions. The solids possess high thermal stabilities, with 3 and 4 exhibiting strong pure red and green characteristic emissions of Eu(III) and Tb(III) at room temperature. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(23):4184-4202
A series of new lanthanide coordination polymers has been synthesized and structurally characterized; [Ln4(TTHA)2(pzac)(H3O)2(H2O)]·5H2O (Ln = Pr (1a) and Nd (1b)), [Sm8(TTHA)4(pzac)0.5(H3O)(H2O)7.5]·4H2O (2), [Ln4(HTTHA)2(SO4)(H2O)4]·5H2O (Ln = Pr (3a) and Nd (3b)), where H6TTHA = 1,3,5-triazine-2,4,6-triamine hexaacetic acid, and H2pzac = 2,5-dioxo-piperazine-1,4-diacetic acid. The compounds feature 3-D frameworks comprising the deprotonated H6TTHA as the primary ligand and either the in situ generated pzac2? or sulfate as the secondary ligands. The influence of the deprotonated H6TTHA in directing the framework structures through preferential coordination modes and molecular conformation is described. The effect of the secondary ligands in increasing the compactness of the frameworks and in the alternation of the framework topologies based on the four-connected pts type is described. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(12):1303-1315
The reaction of α-[SiMo12O40]4? with trivalent cations Ln3+ and N-methyl-2-pyrrolidone leads to a series of complexes of formula [Ln(NMP)4(H2O) n ]H[SiMo12O40]?·?2NMP?·?mH2O [where Ln?=?La (1), Pr (2), Nd (3), Sm (4), Gd (5), n?=?4, Ln?=?Dy (6), Er (7), n?=?3. NMP?=?N-methyl-2-pyrrolidone]. The syntheses, X-ray crystal structures, IR, and ESR spectra and thermal properties of the complexes 1, 2, 4, 6, 7 have been reported previously. Here, we report X-ray crystal structures, IR, UV, ESR spectra and thermal properties of the complexes [Nd(NMP)4(H2O)4]H[SiMo12O40]?·?2NMP?·?1.5H2O (3), and [Gd(NMP)4(H2O)4]H[SiMo12O40]?·?2NMP?·?H2O (5). In addition, the electrochemical behaviour of this series of complexes in aqueous solution and aqueous-organic solution has been investigated and systematic comparisons have been made. All these complexes exhibit successive reduction process of the Mo atoms. 相似文献
6.
《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
7.
《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
8.
以乙酰丙酮为共配体的稀土配合物与2-羟基苯取代的自由基配体进行反应得到2个新颖的稀土-自由基配合物[Ln2(acac)4(NIT-PhO)2](Ln=Tb(1),Y(2);acac=乙酰丙酮,NIT-PhOH=2-(2''-hydroxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide)。2个配合物的结构相同,均是通过2个自由基配体上的羟基氧原子桥联2个稀土离子构成双核结构。直流磁化率的研究表明配合物2具有弱的反铁磁性质。 相似文献
9.
《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
10.
《Journal of Coordination Chemistry》2012,65(6):1084-1093
Six phenoxo-bridged tetradentate salophen heterotrinuclear Zn2Ln complexes, [Ln(ZnL)2(NO3)3(CH3OH)2]·CH3OH·CH2Cl2 [Ln?=?Pr (1), Nd (2)] and [Ln(ZnL)2(NO3)3(CH3OH)]·CH3OH·CH2Cl2 [Ln?=?Eu (3), Ho (4), Er (5), and Yb (6)], have been isolated from reactions of N,N′-bis(salicylidene)-1,2-(phenylene-diamine) with Ln(NO3)36H2O and Zn(OAc)22H2O. X-ray diffraction analysis reveals that 1–6 are isomorphic with phenoxo-bridged, sandwich-like {Zn2Ln} core. Near infrared (NIR) luminescence spectra show that 6 exhibits typical emission of Yb3+ upon excitation at the ligand-centered absorption band at 357?nm. 相似文献
11.
《Journal of Coordination Chemistry》2012,65(17):2796-2803
Direct reaction of pyridine-3,5-dicarboxylic acid (H2PDA) and oxalic acid (H2ox) with Ln(ClO4)3 · nH2O under hydrothermal conditions gave three 3-D coordination networks, [Ln(PDA)(ox)0.5(H2O)2] · H2O [Ln = La(1), Nd(2), and Eu(3)]. The complexes were characterized by elemental analysis (EA), X-ray single-crystal diffraction, infrared spectroscopy (IR), and thermogravimetric analysis (TGA). Single crystal X-ray diffractions shows that the compounds are isomorphous and have 3-D framework structures, in which pyridine-3,5-dicarboxylates (PDA2?) link lanthanides to give 2-D layers, which are further fabricated into a 3-D network via bis-bidentate oxalate bridging. Luminescence of 3 is investigated. 相似文献
12.
以3,3'',5,5''-四-(羧基苯基)联苯为配体(H4L),与镧系金属Ln(Ⅲ)盐反应,自组装形成了5个具有三维孔洞结构的镧系金属-有机框架材料:{[Ln3L2(H2O)7]·(OH)·10DMA}n(Ln=Gd (1a); Ln=Ho(2a), {[Ln3L2(H2O)3]·(OH)·mDMA}n (Ln=Er,m=10(1b); Ln=Yb, m=9(2b); Ln=Lu, m=10(3b))。单晶X射线衍射分析表明,这些MOFs属于2种系列的类质同晶化合物,分别属于正交晶系Ccca空间群和单斜晶系C2/c空间群。有机小分子溶剂交换荧光研究发现,2b对小分子二氯甲烷和甲苯荧光有增强效应,表现出良好的荧光探测功能。 相似文献
13.
《Journal of Coordination Chemistry》2012,65(16-18):2714-2721
AbstractA series of heterometallic metal-organic frameworks (MOFs) employing pyridine-2,6-dicarboxylate and 1,10-phenanthroline as ligands have been synthesized hydrothermally. In isostructural compounds 1–3 [Ln(pydc)3Cu2(phen)4]·I·× H2O (Ln?=?La (1), Nd (2), Dy (3); x?=?6, 5, 5), the metalloligand [Ln(pydc)3] assembles with [Cu(phen)2] units to construct a dodecanuclear cluster via Cu–O bonds and π–π interactions. The clusters are further stacked into three-dimensional supramolecular frameworks with nano-sized cavities. In [La(Hpydc)(pydc)2Zn(phen)3]·3H2O (4), the metalloligand [Ln(Hpydc)(pydc)2] assembles with [Zn(phen)3] units to construct a tetranuclear cluster via electrostatic interaction and π–π interaction. This work reveals that the changes of lanthanide metalloligands and the coordination pattern of 3d transition centers would result in significant variation in the final structures. The thermal, optical, and electrochemical properties have been well investigated. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(15):2659-2668
Two lanthanide coordination polymers, [Tm2·(5-IPA)4·(2,2′-Hbipy)2]·3H2O (1, 5-H2IPA?=?5-hydroxyisophthalic acid, 2,2′-bipy?=?2,2′-bipyridine) and [Er·(5-HIPA)3·(4,4′-bipy)3·(H2O)2]·3H2O (2, 4,4′-bipy?=?4,4′-bipyridine), have formed by hydrothermal synthesis. Complex 1 exhibits a 2-D coordination network containing parallelepiped-shaped voids occupied by guest 2′2-bipy molecules. Complex 2 possesses a 1-D linear chain structure. The 1-D chains are linked by 4,4′-bipy molecules to form a 3-D supramolecular framework. IR spectroscopy, elemental analysis, and thermogravimetric analysis were also investigated. 相似文献
15.
《Journal of Coordination Chemistry》2012,65(10):1800-1813
Four lanthanide complexes with two tri-protonated hexacarboxylic acids [1,2,3,4,5,6-cyclohexane-hexacarboxylic acid (H6chhc) and mellitic acid (H6Mel)], [Pr(H3chhc)(DMF)3(H2O)]·H2O (1), Nd(H3chhc)(DMF)3 (2), [Er(H2O)8]·(H3Mel)·9(H2O) (3), and [Yb(H2O)8]·(H3Mel)·8.5(H2O) (4), have been synthesized in solution at room temperature and characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. The crystal structures of 1 and 2 are made up of a (44, 62) 2-D network extended infinitely parallel to the (1?0?0) plane. The H3chhc3? anions assume a cis-e,a,e,a,e,a-conformation with the central ring in chair-shaped configuration. In 3 and 4, the H3Mel3? as counter ions are interconnected by hydrogen bonds to form 2-D organic supramolecular layers. The coordination modes and abilities of H6chhc and mellitic acid are discussed and compared. The luminescences of 1–4 have been investigated. 相似文献
16.
以3,3’,5,5’-四-(羧基苯基)联苯为配体(H4L),与镧系金属Ln(Ⅲ)盐反应,自组装形成了5个具有三维孔洞结构的镧系金属-有机框架材料:{[Ln3L2(H2O)7]·(OH)·10DMA}n(Ln=Gd(1a);Ln=Ho(2a),{[Ln3L2(H2O)3]·(OH)·mDMA}n(Ln=Er,m=10(1b);Ln=Yb,m=9(2b);Ln=Lu,m=10(3b))。单晶X射线衍射分析表明,这些MOFs属于2种系列的类质同晶化合物,分别属于正交晶系Ccca空间群和单斜晶系C2/c空间群。有机小分子溶剂交换荧光研究发现,2b对小分子二氯甲烷和甲苯荧光有增强效应,表现出良好的荧光探测功能。 相似文献
17.
《Journal of Coordination Chemistry》2012,65(3):509-519
Four coordination polymers of the bidentate ligand 2,2′-dimethyl-4,4′-bipyridine-N,N′-dioxide (L), [La(L)(NO3)3(H2O)] n (1), {[Gd2(L)3(NO3)6]·6H2O} n (2), {[Sm(L)2(H2O)4]·3ClO4·2L·4H2O} n (3) and {[Nd(L)2(H2O)4]·3ClO4·2L·4H2O} n (4) have been synthesized by the diffusing solvent mixture method. Results of X-ray diffraction analysis reveal that 1, with a Ln/L stoichiometry of 1:1, displays a rare 3-D three-fold interpenetrating diamondoid framework, while 2 has a Ln/L stoichiometry of 1:1.5 and exhibits a polycatenane network with a {82,10} topology and large channels accommodated by water. Complexes 3 and 4, with Ln/L stoichiometry of 1:2, have 3-D two-fold interpenetrating diamondoid structures and large voids. Nonlinear optical property of 2 and luminescence of 3 were also investigated. 相似文献
18.
Six heterometallic Zn(II) coordination polymers, Zn(H2O)3(FNA) (1), [NH4]2[Zn(H2O)2(FNA)2] (2), [ZnNa2(FNA)2]·3H2O (3), [ZnK2(FNA)2]·H2O (4), [ZnRb2(FNA)2]·2H2O (5) and [ZnMg(FNA)2]·4H2O (6) (H2FNA = 4-nitrobenzene-1,2-dicarboxylic acid), were synthesised by introducing different alkali/alkaline earth (AeI/AeII) metals. These complexes exhibit diverse structures with the different AeI/AeII metals used and distinct ligand coordination modes the ions provide. For 1 and 2, the Zn(II) centres with distorted octahedra are connected by FNA to form 1-D chain structures. The Zn(II) centres in 3–6 with distorted tetrahedra are linked by FNA to form 2-D anionic grid layers. For 3–5, these 2-D anionic grid layers are connected by alkali metal (Na, K and Rb) with the O–AeI–O connectivity to exhibit 3-D framework structures, while 6 features a 2-D Zn–Mg network. Luminescence properties of 1–6 have been investigated. 相似文献
19.
Zi-Xin Zhu Dan Luo Cheng Liu Dong-Ning Liu Yu-Mei Xiao 《Journal of Coordination Chemistry》2019,72(22-24):3526-3543
AbstractThe hydrothermal reaction of Ln(NO3)3·6H2O with H2tyia (H2tyia = 5-(triazol-1-yl) isophthalic acid) afforded the lanthanide organic frameworks (Ln-MOFs), [Eu2(tyia)3(H2O)3]n (1) and {[Ln2(tyia)3·(H2O)3]· 3H2O}n (Ln?=?Tb 2, Dy 3, Sm 4, Gd 5, and Nd 6). Compounds were characterized by routine methods: PXRD, elemental analysis, solid-state luminescence properties analysis, TGA, FT-IR, and single-crystal X-ray crystallography. In this work, the luminescent properties of 2, 4, 5, and 6 and the responsiveness of various chemical components contained in urine were investigated. These MOFs detect 1-naphthol (1-N), urinary thiodiglycolic acid (TDGA), uric acid (UA), and hippuric acid (HA), which are the final metabolites of carbaryl, vinyl chloride monomers, purine, and toluene, respectively. These new Ln-MOFs offer the potential for biomarkers or metabolic sensors and show excellent selective and sensitive luminescence detection of 1-N, TDGA, UA, and HA. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(22):4032-4051
Ten new complexes, [Cu2(L1)(NO3)2]·2H2O (1), [Cu4(L1)2]·4ClO4·H2O (2), [Cu2(L1)(H2O)2]·(adipate) (3), [Cu6(L1)2(m-bdc)4]·2DMF·5H2O (4), [Cu2(L1)(Hbtc)]·5H2O (5), [Cu2(L1)(H2O)2]·(ntc)·3H2O (6), [Co2(L2)]·[Co(MeOH)4(H2O)2] (7), [Co3(L2)(EtOH)(H2O)] (8), [Ni6(L2)2(H2O)4]·H2O (9) and [Zn4(L2)(OAc)2]·0.5H2O (10), have been synthesized. 1 displays a [Cu2(L1)(NO3)2] monomolecular structure. 2 shows a supramolecular chain including [Cu2L1]2+. In 3, two Cu(II) ions are connected by L1 to form a [Cu2(L1)(H2O)2]2+ cation. In 4, the m-bdc anions bridge Cu(II) ions and L1 anions to form a layer. Both 5 and 6 display 3-D supramolecular structures. 7 consists of both [Co2L2]2? and [Co(MeOH)4(H2O)2]2+ units. 8 and 9 show infinite chain structures. In 10, Zn(II) dimers are linked by L2 to generate a 3-D framework. The magnetic properties for 4 and 8 and the luminescent property for 10 have been studied. 相似文献