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1.
Three coordination polymers, namely, {[Zn(L)(BPY)]·DMF·H2O}n (1), {[Zn(L)(TPY)]·0.5H2BDC·H2O}n (2), {[Cd(L)(H2O)2]·DMF}n (3), have been synthesized based on a rigid linear carboxylate ligand (H2L = 2′,5′-dimethoxy-[1,1′:4′,1″-terphenyl]-4,4″-dicarboxylic acid) and different lengths of pyridine ligands (TPY = 4,3′:5′,4″-terpyridine; BPY = 4,4′-bipyridine). These complexes have been characterized by single crystal X-ray diffraction, infrared spectroscopy, thermogravimetry, elemental analysis, and powder X-ray diffraction measurements. Complex 1 is a 6-connected 3-fold interpenetrating pcu net with point symbol {412 ∙ 63}, 2 and 3 can be simplified as 4-connected sql nets with point symbol {44 ∙ 62}. In addition, their photoluminescent properties are also investigated in detail. 相似文献
2.
《Inorganic chemistry communications》2008,11(11):1316-1319
Three solvent-induced pseudo-polymorphic bimetallic Zn–Nd complexes [ZnNdL(OAc)(NO3)2(DMF)] · solvate (solvate: MeCN (1), THF (2), EtOH (3); H2L = N,N′-bis(3-methoxy-salicylidene)phenylene-1,2-diamine) were obtained, and their solid NIR luminescence related to the packing structure from the intermolecular π–π interactions was discussed. 相似文献
3.
Tao Wei Shunsheng Zhao Weiyu Bi Xingqiang Lü Yani Hui Jirong Song Wai-Kwok Wong Richard A. Jones 《Inorganic chemistry communications》2009,12(12):1216-1219
With the Zn-Schiff-base [ZnL(Py)] from the simple Salen-type Schiff-base ligand H2L (H2L = N,N′-bis(salicylidene)ethylene-1,2-diamine) as the precursor, two co-crystallized heterometallic (Zn2Ln and ZnLn array) complexes [Zn2Ln(L)2(Py)2(NO3)2]·[ZnLn(L)(Py)(NO3)3(H2O)]·NO3·mMeOH·nS (Ln = Er(1), S = CH3CN, m = 2, n = 1 or Gd(2), S = H2O, m = 1, n = 3) were obtained by the further reaction with Ln(NO3)3·6H2O, respectively. The result of their photophysical properties shows the intramolecular effective energy transfer has been demonstrated in the Zn2Er and ZnEr arrayed complex 1, and the co-existence of different chromophores should be a potentially new way to the fine-tuning properties of NIR luminescence from Er3+ ions. 相似文献
4.
Based on the self-assembly of the asymmetric bis-Schiff-base ligand H2L (H2L = 4-((E)-(2-((E)-3,5-dibromo-2-hydroxybenzylideneamino)phenylimino)(phenyl)methyl-1-(4-chlorophenyl)-3-methyl-1H-pyrazol-5-ol) and Zn(OAc)2·2H2O, a new [Zn(L)] (1) was obtained and shown to efficiently catalyze the coupling of CHO (cyclohexene oxide) and CS2 (carbon disulfide) in activation with [PPN]Cl (PPN+ = bis(triphenylphosphoranyidene)-ammonium), n-Bu4NBr or n-Bu4NI, where both poly[thio]carbonates and cyclic [thio]carbonates were produced, and the strong O/S exchange afforded the limited formation of trithiocarbonate in the cyclic [thio]carbonate byproducts. 相似文献
5.
Through the copolymerization of a complex monomer [Zn(L)(4-vinyl-Py)Eu(TTA)3] (2; H2L = N,N′-bis(salicylidene)cyclohexane-1.2-diamine; 4-vinyl-Py = 4-vinyl-pyridine and HTTA = 2-thenoyltrifluoroacetonate) with MMA (methyl methacrylate), the first example of PMMA-supported and highly luminous (ФEuL = 63.1%) color-purity red-light metallopolymer poly(MMA-co-2) based on a tris-β-diketonate Zn2 +-Eu3 +-complex is obtained. 相似文献
6.
Dinuclear iron(III) complexes, [(phenO)Fe(SO4)]2·2CH3OH (1) and [(bpmapO)Fe(NO3)]2(NO3)2·3CH3OH (2) have been prepared by the reaction of phenOH/bpmapOH and FeSO4·7H2O/Fe(NO3)3·9H2O in methanol, respectively (phenOH = N-(2-pyridylmethyl)-N′-(2-hydroxyethyl)ethylenediamine, bpmapOH = N-(bis(2-pyridylmethyl)amino)-2-methylpropan-2-ol). Both complexes are ethoxy-bridged dinuclear species and the iron(III) ions in 1 and 2 have distorted octahedral geometries. Both complexes show strong antiferromagnetic interactions through the bridged ethoxy groups within the dimeric units. 相似文献
7.
Based on the doping of red-light-emitting 2 ([Zn(L)(4-vinyl-Py)Eu(TTA)3]; H2L = N,N′-bis(salicylidene)cyclohexane-1,2-diamine, 4-vinyl-Py = 4-vinyl-pyridine, HTTA = 2-thenoyltrifluoroacetonate) and cyan-light-emitting 4 ([Zn(L)(4-vinyl-Py)Tb(BA)3]; HBA = 1-phenyl-1,3-butanedione) in PMMA, hybrid materials of 2@4@PMMA with improved physical properties including color-tunable for white-light (CIE coordinate 0.373, 0.319) were obtained. 相似文献
8.
Synthesis,characterisation and cryomagnetic studies of a novel homonuclear Nd(III) Schiff base dimer
《Inorganic chemistry communications》2007,10(4):489-493
A novel homodinuclear complex [NdIII(L)(NO3)]2 (1) has been synthesised [H2L = N1,N3- bis(salicylideneimino)diethylenetriamine, a pentadentate Schiff base with N3O2 donor set] and characterised with spectroscopic and micro-analytical techniques. Single crystal X-ray diffraction study reveals a centrosymmetric binuclear neutral entity [space group, P21/n; a = 12.911(5); b = 11.938(5); c = 13.960(5) Å; Z = 4] where Nd(III) metal centers are bridged together by two phenoxo oxygen atoms each coming from the two ligands. The most interesting fact is that two similar “salen” moieties of each ligand are behaving completely different in their coordination. In the doubly deprotonated ligand (L2−), one phenoxo oxygen is mono coordinated to the metal, whereas its immediate neighbour on the other end bridges the two Nd(III) centers. The distance between the Nd(III) centers is found to be 3.884(3) Å. Temperature dependence (2–300 K) magnetic susceptibility study suggests the presence of an antiferromagnetic interaction operating via two phenoxo bridges. 相似文献
9.
Wei-Yu Bi Xing-Qiang Lü Wen-Li Chai Tao Wei Ji-Rong Song Shun-Sheng Zhao Wai-Kwok Wong 《Inorganic chemistry communications》2009,12(3):267-271
With the hetero-binuclear Zn–Nd complex from the ethylene- or phenylene-linkered Salen-type Schiff-base ligand as the building block, further self-assembly of the unsymmetrical exo-dentate IN? (IN? = isonicotinic) anion gave a 2D layer polymeric [ZnL1Nd(IN)(NO3)2]n (1) (H2L1 = N,N′-bis(3-methoxy-salicylidene)ethylene-1,2-diamine) or a discrete binuclear [ZnL2Nd(IN)(NO3)2(DMF] (2) (H2L2 = N,N′-bis(3-methoxy-salicylidene)phenylene-1,2-diamine) complex, respectively. The change of linker flexibility of two Salen-type Schiff-base ligands (H2L1 and H2L2) resulted in the difference of structures and NIR luminescent properties of their mixed-ligands complexes. 相似文献
10.
A new luminescent Zn(II) coordination polymer, namely [Zn4(L)2(μ4-O)(H2O)2(DMF)]n (1 H3L = biphenyl-3,4,5-tricarboxylic acid, DMF = N,N′-dimethyl formamide) has been synthesized by combining the H3L ligand with Zn(II) salts under solvothermal conditions. Single-crystal X-ray diffraction analysis reveals that 1 features μ4-oxygen-bridged tetrahedral {Zn4O} clusters as building subunits, which are further bridged by L3 − ligands into a complicated three-dimensional (3D) architecture. Topological analysis reveals that it can be reduced into a (3, 6)-connected topological network with the schläfli symbol of {4 · 62}2{42 · 69 · 84}. In addition, the luminescent property of 1 was also investigated in the solid state at room temperature. 相似文献
11.
A novel salen type dinuclear dysprosium complex e.g., [Dy2(H2L)(acac)6]·4CH3OH (1) [H2L = N,N′-(1.3-propylene)bis(3-methoxysalicylideneimine) has been isolated by reactions of Dy(acac)3·H2O (acac = acetylacetonate) with salen type (H2L), respectively. X-ray crystallographic analyses reveal that asymmetric Dy(III) ions for 1 was bridged by one ligand displaying bicapped trigonal prism coordination geometry. Magnetic measurement shows that complex 1 exhibit slow relaxations under zero dc field. The presence of two magnetic relaxations in complex 1 is associated with the presence of minute differences in bond lengths around Dy(III) center. 相似文献
12.
Through doping or grafting of a new ZnNd Schiff-base complex monomer [Zn(L)(4-vinyl-Py)Nd(NO3)3] (2; H2L = N,N′-bis(3-methoxy-salicylidene)phenylene-1,2-diamine; 4-vinyl-Py = 4-vinyl-pyridine) into PMMA (poly(methyl methacrylate)), two kinds of hybrid materials 2@PMMA and Poly(2-co-MMA) with significantly improved physical properties including good Nd3 +-centered near-infrared (NIR) luminescence were obtained. Especially the single-nodal ZnNd-grafted Poly(2-co-MMA) soluble in organic solvents exhibits the high sensitization efficiency (ηsens = ΦNdL/ΦNdNd = 81%) even at a high feed molar ratio up to 1:50. 相似文献
13.
Three coordination polymers based on multidentate N-donor ligands and polycarboxylate anions, namely, [Co3(4,4′-tmbpt)4(btc)2]·9.5H2O (1), [Ag4(4,4′-tmbpt)(btec)(H2O)2]·H2O (2) and [Zn(4,4′-tmbpt)(btec)0.5(H2O)]·0.5H2O (3) (4,4′-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(4-pyridyl)-1,2,4-triazole, H3btc = 1,3,5-benzenetricarboxylic acid, and H4btec = 1,2,4,5-benzenetetracarboxylic acid) have been prepared under hydrothermal condition. Compound 1 displays a 3D (3,6,8)-connected framework with (4·62)(44·610·8)(414·612·82) topology. Compound 2 is a 3D (4,5,8)-connected framework with (43·62·8)(43·65·82)(48·62)(410·610·88) topology. Compound 3 exhibits a 2D → 3D polythreading architecture. The photoluminescent spectra indicate that at room temperature, compounds 2 and 3 emit green and blue luminescence, respectively. 相似文献
14.
Through the single-nodal copolymerization of MMA (methyl methacrylate) and a vinyl-containing complex monomer [Zn(L)(4-vinyl-Py)Nd(NO3)3] (2; H2L = N,N′-bis(3-methoxy-salicylidene)ethylene-1,2-diamine; 4-vinyl-Py = 4-vinyl-pyridine) with the both 1π-π* and 3π-π* sensitizing approach to Nd3 + ion, the Zn2 +-Nd3 +-containing metallopolymer Poly(MMA-co-2) exhibits good physical properties including an attractive Nd3 +-centered NIR sensitization efficiency (ΦLNd = 1.22% and η = ΦLNd/ΦNdNd = 82%). 相似文献
15.
《Inorganic chemistry communications》2008,11(11):1371-1374
Reaction of a flexible pyridinecarboxamide ligand N,N′-[(2,3,5,6-tetrafluoro-1,4-phenylene) bis(methylene)]bis(pyridine-4-carboxamide) (H2tfpbbp) with CuII chloride or perchlorate affords two coordination polymers {[Cu(H2tfpbbp)(tfpbbp)(H2O)] · 2DMF · 4H2O}n (1) and {[Cu(H2tfpbbp)2(ClO4)2] · 3H2O}n (2). Both complexes have 2-D (4,4) layered networks extended by the exo-bidentate bridging ligands, which however consist of distinct [Cu–ligand]4 meshes owing to the conformational difference of ligands. Their spectroscopic, thermal, and fluorescence properties have also been investigated. 相似文献
16.
With the monomer [Zn(L1)(H2O)] (1) complex in situ formed by the deprotonated hexadentate Salen-type Schiff-base ligand H2L1 (H2L1 = N,N′-bis(3-methoxy-salicylidene)cyclohexane-1,2-diamine) and Zn(NO3)2 as the precursor, series of the hetero-trinuclear ZnLn2 complexes [ZnLn2(L1)2(L2)(NO3)2Cl] (Ln = Nd, 2; Ln = Yb, 3; Ln = Er, 4 or Ln = Gd, 5) were obtained from the further reaction with LnCl3 (Ln = Nd, Yb Er or Gd) and the second o-vanillin (HL2) ligand, respectively. The photophysical properties of complexes 2–4 showed that the characteristic near-infrared (NIR) luminescence of Ln3 + ions with two emission centers and emissive lifetimes in microsecond ranges, was sensitized from the excited state (both 1LC and 3LC) of mixed H2L1–HL2 ligands. 相似文献
17.
《Inorganic chemistry communications》2005,8(8):746-750
Two new helical Cu(II) coordination polymers, [Cu(2,2′-bpy)(Hsgly)]Cl · 2H2O(H2sgly = N-(2-hydroxylbenzyl)glycine) (1) and [Cu(2,2′-bpy)(Hsala)](NO3) · 2H2O(H2sala = N-(2-hydroxylbenzyl)-l-alanine) (2) were synthesized. Single crystal X-ray diffraction analysis indicated that both complexes showed helical chains arrangement of Cu(II) centers bridged by carboxyl groups. The magnetic measurements showed complex 1 exhibited ferromagnetic interaction while there was no interaction between the Cu(II) centers in complex 2. 相似文献
18.
《Inorganic chemistry communications》2007,10(4):451-454
A zinc metal–organic framework [Zn(tfpbbp)(Ac)2]n (1) has been prepared by reacting N, N′-[(2,3,5,6-tetrafluoro-1,4-phenylene)bis(methylene)]bis(pyridine-4-carboxamide) (tfpbbp) with Zn(Ac)2 · 2H2O and characterized by single crystal X-ray diffraction and TGA analysis. Single crystal X-ray diffraction analysis indicates that in solid-state (1) is a 1-D zigzag chain, which further self-assembles into a 3-D supramolecular porous structure through hydrogen bonding interactions. The polymer (1) exhibits photoluminescent property at room temperature. 相似文献
19.
《Inorganic chemistry communications》2008,11(10):1155-1158
Two novel coordination polymers containing Cd(II) and Co(II) metals, connected via 1,1′-(2,2′-oxybis(ethane-2,1-diyl))bis(1H-imidazole) (L) ligand, have been synthesized. Compound [Cd(L)2(p-BDC)] · 2H2O (1) (p-BDC = 1,4-benzenedicarboxylate anion) is a three-dimensional interdigitated supramolecular architecture. Compound [Co(L)(BTCA)0.5] (2) (BTCA = 1,2,3,4-butanetetracarboxylate anion) possesses a unique (3,4)-connected 3D framework with (83)2(85 · 10) topology. 相似文献
20.
《Inorganic chemistry communications》2007,10(4):447-450
Hydrothermal reaction of nickel acetate with 3-phosphonopropionic acid and 4,4′-bipyridine resulted in two novel phosphonate compounds Ni(HO3PC2H4COO)(4,4′-bpy)(H2O) · 0.5(4,4′-bpy) (bpy = bipyridine) (I) and Ni(O3PC2H4COOH)(4,4′-bpy)(H2O)3 · H2O (II). Single-crystal X-ray studies reveal that self-assemblies between the ligands and metal ion result in layer (I) and chain (II) structures. Magnetic measurement of I indicate there are ferromagnetic couplings between adjacent Ni2+ ions (C = 1.29 cm3 mol−1 K and θ = 2.25 K). 相似文献