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1.
Three Zn(II) complexes, [Zn2(bpp)2(FNA)2]·H2O (1), [Zn(bpp)(FNA)]·H2O (2), and Zn2(bpp)2(FNA)2 (3) (bpp = 1,3-bi(4-pyridyl)propane, H2FNA = 4-nitrobenzene-1,2-dicarboxylic acid), were synthesized and characterized by single-crystal and powder X-ray diffraction methods, IR spectroscopy, TG analyses, elemental analyses, and fluorescent analysis. In 1, the Zn(II) ions are linked by FNA anions and bpp into 2-D layers. The Zn(II) ions in 2 are bridged by FNA anions into chiral chains, which are interlinked by bpp into 3-D metal–organic framework with (65·8) CdS topology. Complex 3 features 1-D zigzag chains, which are interconnected by bpp ligands to give a 3-D framework with (6·74·8)(64·7·8) topology. Complexes 2 and 3 exhibit significant ferroelectric behavior (for 2 remnant polarization Pr = 0.050 μC cm?2, coercive field Ec = 1.13 kV cm?1, saturation of the spontaneous polarization Ps = 0.239 μC cm?2; for 3 Pr = 0.192 μC cm?2, Ec = 4.64 kV cm?1, Ps = 0.298 μC cm?2). 相似文献
2.
Marcin Swiatkowski 《Journal of Coordination Chemistry》2017,70(4):642-675
The coordination compounds of group 12 halides with 2,2′-bipyridine (bpy) and 1,10-phenanthroline (phen), 2[CdF2(bpy)2]·7H2O (1), [ZnI(bpy)2]+·I3? (2), [CdI2(bpy)2] (3), [Cd(SiF6)H2O(phen)2]·[Cd(H2O)2(phen)2]2+·F–·0.5(SiF6)2–·9H2O (4), [Hg(phen)3]2+·(SiF6)2–·5H2O (5), [ZnBr2(phen)2] (6), 6[Zn(phen)3]2+·12Br–·26H2O (7) and [ZnI(phen)2]+·I– (8), have been synthesized and characterized by X-ray crystallography, IR spectroscopy, elemental and thermal analysis. Structural investigations revealed that metal?:?ligand stoichiometry in the inner coordination sphere is 1?:?2 or 1?:?3. A diversity of intra- and intermolecular interactions exists in structures of 1–8, including the rare halogen?halogen and halogen?π interactions. The thermal and spectroscopic properties were correlated with the molecular structures of 1–8. Structural review of all currently known coordination compounds of group 12 halides with bpy and phen is presented. 相似文献
3.
《Journal of Coordination Chemistry》2012,65(5):752-765
Three inorganic–organic hybrid materials based on Keggin-type polyoxometalates (POMs), [CuII2(phen)2(4,4′-bipy)(H4,4′-bipy)2(H2O)2][PMo12O40]2·2H2O (1), [CuII(phen)2(H4,4′bipy)][PW12O40]·H2O (2), and [CuII2(phen)2(4,4′-bipy)(BW12O40)(H2O)2](H24,4′-bipy)0.5·3H2O (3) (phen = 1,10-phenanthroline, 4,4′-bipy = 4,4′-bipyridine), were synthesized using different POMs in the hydrothermal conditions. Compounds 1–3 were characterized by single-crystal X-ray diffraction, IR spectra, elemental analyses, powder X-ray diffraction analyses, and thermogravimetric analyses. Compound 1 presents a two-dimensional (2-D) network containing the Keggin-type [PMo12O40]3? anion and dinuclear metal–organic units [CuII2(phen)2(4,4′-bipy)(H4,4′-bipy)2(H2O)2]3+. Compound 2 is a 2-D architecture constructed from a [PW12O40]3? and mononuclear metal–organic units [CuII(phen)2(H4,4′-bipy)]3+. In 3, the [BW12O40]5? anions link [CuII2(phen)2(4,4′-bipy)] units to form a one-dimensional (1-D) chain [CuII2(phen)2(4,4′-bipy)(BW12O40)(H2O)2]; the 1-D chain connects with protonated 4,4′-bipy ligands and lattice waters, yielding a 2-D layer. Fluorescence spectra, UV–vis spectra, and electrochemical properties of 1–3 have been investigated. 相似文献
4.
Xiao-Liang Zhao Peng Wang Pei-Pei Cui Kai Chen 《Journal of Coordination Chemistry》2014,67(23-24):3854-3862
Two ZnII complexes, [Zn2(L)2(DMF)(H2O)2]·DMF (1) and [Zn(L)(DEF)]·DEF (2), were synthesized by solvothermal reactions using 4,4′-(2,3,5,6-tetramethylbenzene1,4-diyl)dibenzoic acid (H2L) and Zn(NO3)2·6H2O in different solvents of DMF, ethanol, and water for 1 and N,N-diethylformamide (DEF) for 2. The L2? with different coordination modes connect [Zn2(COO)2] secondary building units (SBUs) to generate a wavy 2-D (4,4) network of 1 while in 2 there are paddlewheel [Zn2(COO)4] SBUs which are connected by L2? to form a planar 2-D (4,4) network. The 2-D layered structures show different stacking arrangements and are further linked by hydrogen bonding or C–H?π interactions to give 3-D architectures. The different structures and stacking arrangements of 1 and 2 result from different reaction solvents. Photoluminescence properties of the complexes were investigated. 相似文献
5.
《Journal of Coordination Chemistry》2012,65(13):2329-2341
Four coordination polymers, [Zn(o-bdc)(bth)0.5(H2O)] n (1), [Cd(o-bdc)(bth)0.5(H2O)] n (2), [Zn(m-bdc)(bth)] n (3), and [Cd(p-bdc)(bth)?·?(H2O)2] n (4) (where o-bdc?=?1,2-benzenedicarboxylate, m-bdc?=?1,3-benzenedicarboxylate, p-bdc?=?1,4-benzenedicarboxylate, and bth?=?1,6-bis(triazol)hexane), have been hydrothermally synthesized and structurally characterized. Both 1 and 2 are isostructural, featuring two binodal architectures: (63)(65·8) topology in terms of o-bdc and ZnII/CdII as three- and four-connected nodes. Complex 3 shows a 2-D (4,4) network with the Zn?···?Zn?···?Zn angle of 57.84°, whereas 4 exhibits planar 2-D (4,4) network. These 2-D networks of 3 and 4 are extended by supramolecular interactions, such as CH?···?π/π–π stacking and hydrogen-bonding into 3-D architecture. A structural comparison of these complexes demonstrates that the dicarboxylate building blocks with different dispositions of the carboxyl site play a key role in governing the coordination motifs as well as 3-D supramolecular lattices. Solid-state properties such as photoluminescence and thermal stabilities of 1–4 have also been studied. 相似文献
6.
《Journal of Coordination Chemistry》2012,65(9):1550-1561
Three polyoxometalate supramolecular assemblies based on rigid 2-(4-thiazolyl)benzimidazole (L) and two types of polytungstate anions, [CuII2Cl(L)4(PW12O40)]·3H2O (1), [CuII(L)2(H2O)]2[P2W18O62]·(HL)2·6H2O (2), and [ZnII(L)3]4[H(KPW12O40)3] (3), have been synthesized and characterized by single-crystal X-ray diffraction, elemental analyses, and IR spectra. Compound 1 contains binuclear copper clusters {Cu2L4Cl}3+ with Cl– as bridges. These binuclear clusters and [PW12O40]3– anions construct a supramolecular 2-D layer through hydrogen-bonding interactions. In 2, the [CuL2(H2O)]2+ subunits and Wells–Dawson anions build a 1-D supramolecular chain. In 3, the [PW12O40]3– anions are covalently linked by K+ to form an inorganic chain. These chains and discrete [ZnII(L)3]2+ subunits construct a 3-D supramolecular structure. The electrochemical and photocatalytic properties of 1–3 have been studied. 相似文献
7.
《Journal of Coordination Chemistry》2012,65(17):3133-3146
Two unsymmetric bis-aroyl-hydrazines, N′-(2-hydroxybenzoyl)isonicotinohydrazide (L1) and N′-(2-hydroxybenzoyl)nicotinohydrazide (L2), were synthesized through reactions of salicyl hydrazide with isonicotinoyl chloride and nicotinoyl chloride, respectively. Reactions of metal salts with L1 or L2 gave three new complexes, [Cd(L1)2(SCN)2] n (1), [Zn(L1)2Cl2]?·?H2O (2), and [Zn(L2)2Cl2] (3). Complex 1 features a 1-D double-chain structure built by SCN– bridging six-coordinate CdII centers while 2 and 3 are mononuclear ZnII complexes. In 1–3, isomeric ligands L1 and L2 coordinate with metal ions in a terminal coordination mode. Ligands L1 and L2 through O–H···N and N–H···O hydrogen-bonding interactions in 1–3 are crucial for the structure extension into 3-D supramolecular structures of 1 and 2, or 2-D sheet of 3. Complexes 1–3 emit interesting blue-green luminescence. Thermal behaviors of 1–3 as well as the specific rotation of 2 were also investigated. 相似文献
8.
《Journal of Coordination Chemistry》2012,65(16):2719-2727
Three new transition metal complexes, [FeII(H2O)6][(C9H7NO3)2FeII] · H2O (1), H[K(H2O)3][(C9H7NO3)2CoII] · H2O (2), and [CoII(H2O)6][(C9H7NO3)2CoII] · H2O (3), with salicylideneglycine have been synthesized and characterized by elemental analysis, IR spectra, UV-Vis spectroscopy, and X-ray crystallography. The structure analyses indicate that the tridentate salicylideneglycine binds through aliphatic nitrogen, phenoxy, and carboxylic oxygen in the anion. There are many inter- and intra-molecular hydrogen bonds among lattice water, the anion, and the cation to form a 3-D network. The thermogravimetric analyses and the quantum chemistry calculations of compounds 1, 2, and 3 are also discussed. 相似文献
9.
《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
10.
《Journal of Coordination Chemistry》2012,65(4):721-729
Four CuII and CoII complexes–[Cu(L1)Cl2(H2O)]3/2H2O · 1/2EtOH, [Cu(L1)2Cl2]6H2O, [Co(L1)Cl2]3H2O · EtOH, and [Co2(L1)(H2O)Cl4]1.5H2O · EtOH (L1 = 2,4,6-tri(2-pyridyl)-1,3,5-triazine; TPT)–were synthesized by conventional chemical method and used to synthesize another four metal complexes–[Cu(L1)I2(H2O)]6H2O, [Cu(L1)2I2]6H2O, [Co(L1)I(H2O)2]I · 2H2O, and [Co2(L1)I4(H2O)3]–using tribochemical reaction, by grinding it with KI. Substitution of chloride by iodide occurred, but no reduction for CuII or oxidation of CoII. Oxidation of CoII to CoIII complexes was only observed on the dissolution of CoII complexes in d6-DMSO in air while warming. The isolated solid complexes (CuII and CoII) have been characterized by elemental analyses, conductivities, spectral (IR, UV-Vis, 1H-NMR), thermal measurements (TGA), and magnetic measurements. The values of molar conductivities suggest non-electrolytes in DMF. The metal complexes are paramagnetic. IR spectra indicate that TPT is tridentate coordinating via the two pyridyl nitrogens and one triazine nitrogen forming two five-membered rings around the metal in M : L complexes and bidentate via one triazine nitrogen and one pyridyl nitrogen in ML2 complexes. In binuclear complexes, L is tridentate toward one CoII and bidentate toward the second CoII in [Co2(L1)Cl4]2.5H2O · EtOH and [Co2(L1)I4(H2O)3]. Electronic spectra and magnetic measurements suggest a distorted-octahedral around CuII and high-spin octahedral and square-pyramidal geometry around CoII. 相似文献
11.
Y. H. Li Z. G. Ma B. Yuan B. B. Ding X. Z. Li L. N. Zhu 《Russian Journal of Coordination Chemistry》2016,42(8):546-556
A new macrocyclic oxamido-nickle(II) complex Na2NiL was synthesized. L denotes the doubly deprotonated forms of (13Z, 19Z)-16-methyl-6,7-dioxo-5,6,7,8-tetrahydrotriben-zo[b,f,l][1,4,8,11]tetraazacyclotetradecine- 13,20-dicarboxylate. Based on the complex ligand Ni(L2–), two heterometallic complexes [Ca2(NiL)2(H2O)8] · 10H2O (I) and [Co(NiL)2(H2O)2][Co(H2O)6] · 2.8H2O (II) were prepared. X-ray single crystal analyses (CCDC nos. 914618 (I), 914616 (II)) revealed that [Ca2(NiL)2(H2O)8] in I is a molecular box and the trinuclear complex anion [Co(NiL)2(H2O)2]2–in II is centrosymmetric. Thermogravimetric analyses showed that I exhibited moderately good stability and Co(II) catalyzed the thermal decomposition of II. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(15):2497-2510
Reactions of fresh M(OH)2 (M = Zn2+, Cd2+) precipitate and (RS)-2-methylglutaric acid (H2MGL), 2,2′-bipyridine (bipy), or 1,10-phenanthroline (phen) in aqueous solution at 50°C afforded four new metal–organic complexes [Zn2(bipy)2(H2O)2(MGL)2] (1), [Zn2(phen)2(H2O)(MGL)2] (2), [Cd(bipy)(H2O)(MGL)] · 3H2O (3), and [Cd(phen)(H2O)(MGL)] · 2H2O (4), which were characterized by single crystal X-ray diffraction, IR spectra, TG/DTA analysis as well as fluorescence spectra. In 1, the [Zn(bipy)(H2O)]2+ moieties are linked by R- and S-2-methylglutarate anions to build up the centrosymmetric dinuclear [Zn2(bipy)2(H2O)2(MGL)2] molecules. In 2, the 1-D ribbon-like chains [Zn2(phen)2(H2O)(MGL)2] n can be visualized as from centrosymmetric dinuclear [Zn2(phen)2(H2O)2(MGL)2] units sharing common aqua ligands. Both 3 and 4 exhibit 1-D chains resulting from [Cd(bipy)(H2O)]2+ and [Cd(phen)(H2O)]2+, respectively, bridged alternately by R- and S-2-methylglutarate anions in bis-chelating fashion. The intermolecular and interchain π···π stacking interactions form supramolecular assemblies in 1 and 1-D chains in 2–4 into 2-D layers. The hydrogen bonded lattice H2O molecules are sandwiched between 2-D layers in 3 and 4. Fluorescence spectra of 1–4 exhibit LLCT π → π* transitions. 相似文献
13.
《Journal of Coordination Chemistry》2012,65(16):2877-2892
A series of transition metal (Zn, Cu, Mn) complexes with chelidamic acid (2,6-dicarboxy-4-hydroxypyridine, H3CAM) and 4,4′-bipyridine (bipy), [Zn2(bipy)Cl2] n (1), {[Zn2(HCAM)(H2CAM)2]?·?(bipy)?·?3.5H2O} n (2), [Mn3(HCAM)3(H2O)7]?·?(bipy)?·?3H2O (3), [Mn2(HCAM)2(bipy)?·?(H2O)2]?·?4H2O (4), [Cu2(HCAM)2(bipy)?·?(H2O)2]?·?4H2O (5), and Cu2(HCAM)2(bipy)?·?(H2O)2 (6), have been synthesized by hydrothermal or solution methods and characterized by single-crystal X-ray diffraction. The structural analyses reveal that 1 exhibits a zigzag chain of Zn(II), Cl?, and 4,4′-bipyridine. In 2, a 1-D polymeric [Zn2(HCAM)(H2CAM)2] n chain and a discrete 4,4′-bipyridine assemble into a 2-D supramolecular network via H-bonds. Complex 3 consists of asymmetric units of Mn3(HCAM)3(H2O)7 that are linked by hydrogen bonds to form a 2-D H-bonded network. Complexes 4–6 are isomorphous and possess discrete structures. The photoluminescent properties of 1–6 at room temperature were studied. 相似文献
14.
《Journal of Coordination Chemistry》2012,65(11):1849-1858
Two new CdII complexes, [Cd(L)2(CH3OH)2]∞ (1) and [Cd(L)2(pyz)(H2O)]∞ (2), have been prepared by the reaction of xanthene-9-carboxylic acid (HL) and Cd(ClO4)2·6H2O in the presence or absence of pyz co-ligand (L?=?xanthene-9-carboxylate and pyz?=?pyrazine). Their structures were determined by single-crystal X-ray diffraction. Complex 1 possesses a 1-D zigzag chain structure, whereas 2 has a 1-D linear chain that is further assembled into a 2-D network, and then an overall 3-D framework by inter-chain O–H?···?O hydrogen bonds and C–H?···?π supramolecular interactions. Both 1 and 2 are photoluminescent and their emission properties are closely related to their intrinsic structures. 相似文献
15.
[Hg2(L1)2I4] (1), [Cd2(L1)2I4] (2), {[Cd(L1)2(SO4)(H2O)]·4H2O}n (3), {[Zn2(L2)2(Cl)4]·0.5H2O} (4), {[Cu2(L2)2(SO4)2(H2O)4]·2.5H2O} (5), and {[Cd(L2)2(SO4)(H2O)]·3H2O}n (6), based on N–(3–picolyl)–N′–(3–pyridyl)urea (L1) or N–(4–picolyl)–N′–(3–pyridyl)urea (L2), have been synthesized and characterized by elemental analyses, IR spectra, single-crystal and powder X-ray diffraction, and thermogravimetric analyses. Complexes 1 and 2 are isomorphous and feature similar rectangular metal organic loops, which were further extended into 2-D supramolecular structures through hydrogen bonds. Complex 3 possesses a 2-D sql sheet, and the channels between the neighboring sheets are filled with lattice water molecules, which formed a 1-D water tape. Complex 4 also exhibits a rectangular metal organic loop and a 3-D supramolecular structure with the help of hydrogen bonding interactions. Complex 5 also possesses a metal organic loop, and the water molecules interacted with sulfates, constructing a 1-D water–sulfate tube. Complex 6 features a 1-D loop polymeric chain. Moreover, the solid state luminescences of 1–4 and 6 have been investigated. 相似文献
16.
O. Chiobenika P. Bourosh V. Lozan O. Bologa I. Bulkhak B. Wicher Yu. Simonov 《Russian Journal of Inorganic Chemistry》2011,56(7):1050-1059
New cobalt trans-dioximate complexes with isoniconinamide have been synthesized: [CoII(DmgH)2(Inia)2] (I), [CoIII(DmgH)2(Inia)2][PF6] · 1.5H2O (II), [CoIII(NioxH)2 (Inia)2][PF6] · H2O · CH3OH (III), and [CoIIICl(DmgH)2(Inia)] · H2O (IV), where DmgH− and NioxH− are the dimeth-ylglyoxime and 1,2-cyclohexanedionedioxime monoanions, respectively; Inia is the isonicotinamide molecule.
The structures of compounds I–IV have been determined by X-ray crystallography. In I–IV, Co(II) or Co(III) has an octahedral environment with the pseudomacrocyclic (DioxH−)2 moiety (DioxH− is the dioximate monoanion) in the equatorial plane. The latter is stabilized by O-H…O hydrogen bonds. The isonicotinamide
molecules in all four complexes are monodentately bound to the metal ion through the heterocyclic nitrogen atom. 相似文献
17.
《Journal of Coordination Chemistry》2012,65(24):4375-4388
Four new fpa-metal complexes, [Co(fpa)2(H2O)2] (1), [Cu(fpa)2(H2O)] (2), [Zn2(fpa)4(bpp)2] n (3), and {[Zn(bpy)(H2O)4]?·?2(fpa)} n (4), have been synthesized and fully characterized by elemental analyses, IR spectroscopy, single-crystal X-ray diffraction, and thermogravimetric analysis (TGA), (Hfpa?=?2,2-difluoro-2-(pyridine-2-yl)acetate, bpp?=?1,3-bis(4-pyridyl)propane, bpy?=?4,4′-bipyridine). X-ray diffraction analyses reveal that 1 and 2 with 0-D structures are both extended into 3-D supramolecular networks through hydrogen bonds and π···π interactions. Complex 3 with chiral centers possesses a 1-D structure constructed by two kinds of bpp molecules and four kinds of fpa? molecules with different conformations, with bbp and fpa? bridging and capped ligands, respectively. In 4, bpy links [Zn(H2O)4]2+ into a 1-D polymeric cationic chain and uncoordinated fpa? compensates the framework charge. The results of TGA reveal that fpa? decomposes through two processes. Both 3 and 4 show strong fluorescence in the solid state at room temperature. 相似文献
18.
《Journal of Coordination Chemistry》2012,65(23):3810-3818
Two supramolecular compounds based on tungstoferrate [FeW12O40]5?, [FeII(2,2′-bipy)3]2[HFeW12O40] · 5H2O (1), and [Hpy]2[4,4′-H2bipy]6(H3O)[FeW12O40]3 · 11H2O (2) (py = pyridine, bipy = bipyridine) were synthesized hydrothermally and characterized structurally. The hydrogen bonds between polyoxoanions and water and the edge-to-face π–π interaction between [FeII(2,2′-bipy)3]2+ with a shortest C–C distance of 3.513 Å are the main forces to construct the 3-D architecture of 1. In 2, a 3-D supramolecular architecture is assembled by the tungstoferrate anions, protonated 4,4′-bipy cations, and water through hydrogen bonding. The variable-temperature magnetic susceptibilities indicate that 1 is paramagnetic with μ eff corresponding to one Fe(III) with spin-only contribution, showing that Fe in the coordination cations has a +II oxidation number and low spin state. 相似文献
19.
《Journal of Coordination Chemistry》2012,65(24):4201-4214
Reaction of 2-methyl-imidazole-4,5-dicarboxylic acid (H3MIDC) with different salts (Zn and Mn) has led to three new H n MIDC–metal complexes varying from zero- to two-dimensional structures under hydrothermal and solvothermal conditions. The complex [Zn(H2MIDC)2(H2O)2] (1) is a 0-D complex constructed by H2MIDC? and Zn centers and the complex [Mn(HMIDC)(H2O)2]?·?H2O (2) is a polymeric 1-D chiral chain constructed by HMIDC2? and Mn centers connected into a 3-D supramolecular framework with a 1-D channel. The complex [Zn3(MIDC)2(H2O)2(DMF)2]?·?0.5H2O (3) shows a 2-D puckered structure composed of MIDC3? and Zn. The differences of the three complexes demonstrate that reaction solvent and temperature have important effects on the structure of these complexes. Complex 3 shows strong fluorescence in the solid state at room temperature. 相似文献
20.
《Journal of Coordination Chemistry》2012,65(21):3708-3720
Seven coordination compounds based on 1,1′-(1,4-butanediyl)bis(3-carboxyl-2-oxidopyridinium), [CoNa(L)1.5(C2H5OH)3] (1), [Zn(L)(OH)2]?·?4H2O (2), [Co(L)(OH)2]?·?2H2O (3), [Co(L)(H2O)] (4), [Zn(L)(H2O)] (5), [Ni(L)(H2O)] (6), and [Mn(L)(H2O)] (7), have been synthesized and crystal structures have been determined by single-crystal X-ray diffraction. Compound 1 exhibits a 0-D molecular structure. Compound 2 shows a 1-D “Z” chain structure. Neighboring chains are further linked by hydrogen-bonding interactions into a 2-D supramolecular layer. Compound 3 features a 1-D “Z” chain structure. The chains are further extended into a 2-D supramolecular structure by hydrogen-bonding interactions. Compounds 4–7 are isomorphous and display 2-D (44)-SQL networks. These compounds are further characterized by infrared spectra, elemental analyses, and X-ray powder diffraction. The luminescent properties of the compounds were also investigated. 相似文献