共查询到20条相似文献,搜索用时 15 毫秒
1.
《Inorganica chimica acta》1986,123(1):35-40
The interaction between saccharose and manganese in different oxidation states was studied in alkaline media by polarographic, potentiometric, ESR spectroscopic and UV-Vis spectrophotometric methods. The results showed that stable manganese(II) and manganese(III) complexes and a complex of manganese(II,III) in a mixed oxidation state were formed with the composition [MnIIL(OH)2], [Mn2IIIL2(OH)8]2− and [MnIIMnIIIL2(OH)6]−, respectively. The manganese(II)-saccharose complex was shown to dimerize in alkaline media. The stability constants of the Mn(II,III) and Mn(III) complexes were determined. The oxidation of the manganese(II)-saccharose complex by a stoichiometric amount of K3 [FeCN]6 resulted in the formation of the manganese(III) and manganese(IV) complexes. However, oxidation by molecular oxygen only yielded the manganese(III) complex which reduced spontaneously in inert atmosphere to the mixed valence Mn(II,III) complex. The latter was able to be oxidized again by oxygen to the Mn(III) complex. This process proved to be reversible and could be repeated several times. 相似文献
2.
Bin Liu Ping Ping Shen Wei Shi Yu Guang Song Wei Li Zhou Nie Yang Liu 《Journal of biological inorganic chemistry》2006,11(5):626-632
The oxygen-evolving complex (OEC) of Mn-depleted photosystem II (PSII) can be reconstituted in the presence of exogenous Mn or a Mn complex under weak illumination, a process called photoactivation. Synthetic Mn complexes could provide a powerful system to analyze the assembly of the OEC. In this work, four mononuclear Mn complexes, [(terpy)2MnII(OOCH3)]·2H2O (where terpy is 2,2′:6′,2″-terpyridine), MnII(bzimpy)2, MnII(bp)2(CH3CH2OH)2 [where bzimpy is 2,6-bis(2-benzimidazol-2-yl)pyridine] and [MnIII(HL)(L)(py)(CH3OH)]CH3OH (where py is pyridine) were used in photoactivation experiments. Measurements of the photoreduction of 2,6-dichorophenolindophenol and oxygen evolution demonstrate that photoactivation is more efficient when Mn complexes are used instead of MnCl2 in reconstructed PSII preparations. The most efficient recoveries of oxygen evolution and electron transport activities are obtained from a complex, [MnIII(HL)(L)(py)(CH3OH)]CH3OH, that contains both imidazole and phenol groups. Its recovery of the rate of oxygen evolution is as high as 79% even in the absence of the 33-kDa peptide. The imidazole ligands of the Mn complex probably accelerate P
680
•+
reduction and consequently facilitate the process of photoactivation. Also, the strong intermolecular hydrogen bond probably facilitates interaction with the Mn-depleted PSII via reorganization of the hydrogen-bonding network, and therefore promotes the recovery of oxygen evolution and electron transport activities. 相似文献
3.
Kenji Nomiya Kuniaki Onodera Ken Tsukagoshi Kouhei Shimada Akira Yoshizawa Tada-aki Itoyanagi Akiyoshi Sugie Shinichiro Tsuruta Ryo Sato Noriko Chikaraishi Kasuga 《Inorganica chimica acta》2009,362(1):43-55
Metal-oxygen bonding complexes (M = MgII, MnII, NiII, MoVI, WVI, PdII, SbIII, BiIII, FeIII, TiIV, KI, BaII, ZrIV and HfIV) with a hinokitiol (Hhino; 2-hydroxy-4-isopropylcyclohepta-2,4,6-trienone or β-thujaplicin) ligand, which has two unequivalent oxygen donor atoms, were synthesized and characterized by elemental analysis, TG/DTA, FT-IR and solution (1H and 13C) NMR spectroscopy. Single-crystal X-ray structure analysis revealed various molecular structures for the complexes, which were classified into several families of family, i.e. type A [MII(hino)2(L)]2 (M = MgII, MnII, NiII; L = EtOH or MeOH), with a dimeric structure consisting of one bridging hino− anion, one chelating hino− anion and one alcohol or water molecule, type B, with the octahedral, cis-dioxo, bis-chelate complexes cis-[MVIO2(hino)2] (M = MoVI, WVI), type C, with square planar complex [MII(hino)2] (M = PdII), type D, with tris-chelate, 7-coordinate complexes with one inert electron pair [MIII(hino)3] (M = SbIII, BiIII), type D′, with the bis-chelate, pseudo-6-coordinate complexes with one inert electron pair [MIII(hino)2X] (M = SbIII, X = Br), type E, with tris-chelate, 6-coordinate complexes with Δ and Λ isomers [MIII(hino)3] (M = FeIII), type E′ of bis-chelate, 6-coordinate complex [MIV(hino)2X2] (M = TiIV, X = Cl), type F, with water-soluble alkali metal salts [MI(hino)] (M = KI), and type H, with tetrakis-chelate, 8-coordinate complexes [MIV(hino)4](M = ZrIV, HfIV). These structural features were compared with those of metal complexes with a related ligand, tropolone (Htrop). The antimicrobial activities of these complexes, evaluated in terms of minimum inhibitory concentration (MIC; μg mL−1) in two systems, were compared to elucidate the relationship between structure and antimicrobial activity. 相似文献
4.
Wen-Feng Liaw Chung-Hung HsiehShie-Ming Peng Gene-Hsiang Lee 《Inorganica chimica acta》2002,332(1):153-159
The SS bond-activation of diorganyl disulfide by the anionic metal carbonyl fragment [Mn(CO)5]− gives rise to an extensive chemistry. Oxidative decarbonylation addition of 2,2′-dithiobis(pyridine-N-oxide) to [Mn(CO)5]−, followed by chelation and metal-center oxidation, led to the formation of [MnII(SC5H4NO)3]− (1). The effective magnetic moment in solid state by SQUID magnetometer was 5.88 μB for complex 1, which is consistent with the MnII having a high-spin d5 electronic configuration in an octahedral ligand field. The average Mn(II)S, SC and NO bond lengths of 2.581(1), 1.692(4) and 1.326(4) Å, respectively, indicate that the negative charge of the bidentate 1-oxo-2-thiopyridinato [SC5H4NO]− ligand in complex 1 is mainly localized on the oxygen atom. The results are consistent with thiolate-donor [SC5H4NO]− stabilization of the lower oxidation state of manganese (Mn(I)), while the O,S-chelating [SC5H4NO]− ligand enhances the stability of manganese in the higher oxidation state (Mn(II)). Activation of SS bond as well as OH bond of 2,2′-dithiosalicylic acid by [Mn(CO)5]− yielded [(CO)3Mn(μ-SC6H4C(O)O)2Mn(CO)3]2− (4). Oxidative addition of bis(o-benzamidophenyl) disulfide to [Mn(CO)5]− resulted in the formation of cis-[Mn(CO)4(SR)2]− (R=C6H4NHCOPh) which was employed as a chelating metallo ligand to synthesize heterotrinuclear [(CO)3Mn(μ-SR)3Co(μ-SR)3Mn(CO)3]− (8) possessing a homoleptic hexathiolatocobalt(III) core. 相似文献
5.
The two isostructural anions, [CeIII(α-PW11O39)2]11− and [CeIV(α-PW11O39)2]10−, both composed of CeIII/IV sandwiched by two mono-lacunary Keggin units [α-PW11O39]7−, were isolated as dimethylammonium salts and structurally characterized by single-crystal X-ray diffraction analysis. The structures of the [CeIII/IV(α-PW11O39)2]11−/10− anions exhibit two enantiomers d- and l-forms due to C2 (2) symmetry from the square-antiprismatic coordination of the central CeIII/IVO8 polyhedron. The CeIII compound crystallizes in achiral space group P21/n, while the CeIV analog in chiral space group P21 shows spontaneous resolution without any chiral auxiliaries. The correlation between the ionic radius of the central metal (M) and twist angle of the two mono-lacunary units was studied for a series of [M(α-PW11O39)2]n− (M = CeIII/IV, EuIII, ZrIV, HfIV) anions and explained in terms of steric repulsion between the O atoms in the mono-lacunary units. 相似文献
6.
Yajie Yin Dou Li Yangqing Wang Zhonghui Xu Guojing Xu Ziqiang Zhao 《Geomicrobiology journal》2019,36(4):317-325
In this study, we report a bacterium, Achromobacter sp. TY3-4, capable of concurrently removing Mn (II) and Cr (VI) under oxic condition. TY3-4 reduced as much as 2.31?mM of Cr (VI) to Cr (III) in 70?h, and oxidized as much as 20?mM of Mn(II) to Mn oxides in 80?h. When 0.58?mM Cr (VI) and 10?mM Mn(II) were present together, both Cr(VI) and Mn(II) were completely removed by TY3-4 and the generated precipitates are MnIIIOOH, MnIII,IV3O4, MnIVO2 and CrIII(OH)3. Experiments also show that both biosroption and bioreduction of Mn(II) are the driving forces for Mn(II) removal, whereas bioreduction of Cr(VI) is the driving force for Cr(VI) removal. On the basis of these results, a possible reaction was proposed that TY3-4 concurrently reduces Cr(VI) and oxidizes Mn(II). This study is fundamental for Mn and Cr cycles. The strain shows potential for practical application. 相似文献
7.
Four MnIII quadridentate Schiff-base compounds have been prepared and structurally characterized: [Mn(salpn)(CH3OH)2]BPh4 (1), [Mn2(salpn)2(N3)2] (2), [Mn2(salpn)2(NCS)2] (3), [Mn2(salpn)2(H2O)2](H2O)(ClO4)2 (4) (salpn = N,N′-(1,2-propylene)-bis-(salicylideneiminate)). Among them, 1 is a discrete MnIII monomeric complex with a square-bipyramidal geometry. Complexes 2, 3 and 4 form the similar phenolate-bridged out-of-plane dimers. Magnetic susceptibility studies reveal that 2, 3 and 4 all exhibit ferromagnetic intra-dimer coupling between MnIII ions. 相似文献
8.
Diego Moreno Claudia Palopoli Sandra Signorella 《Journal of inorganic biochemistry》2010,104(5):496-502
Two new MnIII complexes Na[Mn(5-SO3-salpnOH)(H2O)] ⋅ 5H2O (1) and Na[Mn(5-SO3-salpn)(MeOH)] ⋅ 4H2O (2) (5-SO3-salpnOH = 1,3-bis(5-sulphonatosalicylidenamino)propan-2-ol, 5-SO3-salpn = 1,3-bis(5-sulphonatosalicylidenamino)propane) have been prepared and characterized. Electrospray ionization-mass spectrometry, UV-visible and 1H NMR spectroscopic studies showed that the two complexes exist in solution as monoanions [Mn(5-SO3-salpn(OH))(solvent)2]−, with the ligand bound to MnIII through the two phenolato-O and two imino-N atoms located in the equatorial plane. The E1/2 of the MnIII/MnII couple (−47.11 (1) and −77.80 mV (2) vs. Ag/AgCl) allows these complexes to efficiently catalyze the dismutation of , with catalytic rate constants 2.4 × 106 (1) and 3.6 × 106 (2) M−1 s−1, and IC50 values of 1.14 (1) and 0.77 (2) μM, obtained through the nitro blue tetrazolium photoreduction inhibition superoxide dismutase assay, in aqueous solution of pH 7.8. The two complexes are also able to disproportionate up to 250 equivalents of H2O2 in aqueous solution of pH 8.0, with initial turnover rates of 178 (1) and 25.2 (2) mM H2O2 min−1 mM−1 catalyst−1. Their dual superoxide dismutase/catalase activity renders these compounds particularly attractive as catalytic antioxidants. 相似文献
9.
A series of mononuclear manganese(III) complexes of formulae [Mn(L)(X)(H2O)] (1-13) and [Mn(L)(X)] (14-17) (X = ClO4, F, Cl, Br, I, NCS, N3), derived from the Schiff bases of 5-bromosalicylaldehyde and different types of diamine (1,2-diaminoethane, 1,2-diaminopropane, 1,3-diaminopropane and 1,4-diaminobutane), have been synthesized and characterized by the combination of IR, UV-Vis spectroscopies, cyclic voltammetry and by X-ray crystallography. The redox properties of all the manganese(III) complexes show grossly identical features consisting of a reversible or quasireversible MnIII/MnII reduction. Besides MnIII/MnII reduction, the complexes 4, 5, 10, 13 and 16 also show reversible or quasireversible MnIII/MnIV oxidation. A linear correlation has been found for the complexes 5, 7, 11 and 13 [Mn(L2)(X)(H2O)] (X = F, Cl, Br, I) when E1/2 [MnIII/MnII] is plotted against Mulliken electronegativities (χM). The effect of the flexibility of the ligand on redox potential has been studied. It has been observed that the manganese(II) state is stabilized with increasing flexibility of the ligand environment. The crystal structure of 6 shows an octahedral geometry. 相似文献
10.
Ram A. Lal Samhita Bhaumik Mahesh K. Singh Sanjesh Choudhury Arvind Kumar 《Inorganica chimica acta》2006,359(10):3105-3110
The binuclear manganese (IV) [Mn2(Hsal)4(OH)4] (H2sal = salicylic acid) complex has been obtained from a complex reaction mixture in methanol consisting of Mn(II)(OAc)2 · 4H2O, GS ( a reagent obtained by refluxing glycine and salicylaldehyde in 1:1 molar ratio in methanol), monosodium salicylate and pyridine. The compound contains a distorted octahedral MnO6 coordination unit of potential importance to high oxidation state manganese bimolecules. 相似文献
11.
A series of carboxylate-bridged manganese(III) complexes derived from Schiff bases obtained by the condensation of salicylaldehyde or 5-bromo-salicylaldehyde and different types of diamine have been synthesized and characterized and, in the case of [Mn2(L1)2(μ-ClCH2COO)](ClO4) (1), the structure has been obtained by X-ray crystallography. The structure of 1 consists of two manganese atoms separated by 5.487(3) Å and bridged by a carboxylate anion. This dinuclear structural unit is linked by bridging phenoxy oxygens to adjacent dinuclear units to produce a one-dimensional chain. Cyclic voltammograms of all the compounds exhibit grossly similar features consisting of a reversible or quasi-reversible MnIII/MnII reduction and a MnIII/MnIV oxidation. It has been observed that bromo-substitution stabilizes the lower oxidation state in the MnIII/MnII couple and destabilizes the higher oxidation state in the MnIII/MnIV couple. Variable temperature magnetic susceptibility measurements of 1 show a weak antiferromagnetic interaction. The magnetic behavior is satisfactorily modeled by inclusion of zero-field splitting and an intermolecular interaction component. 相似文献
12.
《Inorganica chimica acta》2006,359(5):1619-1626
The reaction of 1,4-dimethyl-1,4,7-triazacyclononane (L-Me2) with MnCl2 · 4H2O in acetonitrile gives, in the presence of sodium formate, hydrogen peroxide, triethylamine and KPF6, the dinuclear Mn(III)–Mn(IV) complex cation [(L-Me2)2Mn2(O)2(OOCH)]2+ (1) which crystallises as the hexafluorophosphate salt.The analogous reaction with sodium benzoate, however, yields the dinuclear Mn(III)–Mn(III) complex cation [(L-Me2)2Mn2(O)(OOCC6H5)2]2+ (2), isolated also as the hexafluorophosphate salt.In the case of sodium acetate, both cations, the Mn(III)–Mn(IV) complex [(L-Me2)2Mn2(O)2(OOCCH3)]2+ (3) and the known Mn(III)–Mn(III) complex [(L-Me2)2Mn2(O)(OOCCH3)2]2+ (4) are available, depending upon the molar ratio.The single-crystal X-ray structure analyses show for the green crystals of [1][PF6]1.5[Cl]0.5 · 1.5 H2O and [3][PF6]2 · (CH3)2CO, a Mn–Mn distance of 2.620(2) and 2.628(4) Å, respectively, while for the red-violet crystal of [4][PF6]2, a Mn–Mn distance of 3.1416(8) Å is observed.All four compounds show catalytic activity for the oxidation of isopropanol with hydrogen peroxide in water and in acetonitrile to give acetone in the presence of oxalic or ascorbic acid as co-catalysts. 相似文献
13.
《Inorganica chimica acta》2004,357(1):25-32
Two compounds H[Mn(cyclam)(pyridine-2,6-dicarboxylate)2] · H2O (1) and [MnIII(cyclam)Cl2]ClO4 (2) (where cyclam=1,4,8,11-tetraazacyclotetradecane) have been synthesized and structurally characterized. The complex 1 crystallizes in the monoclinic space group P2(1)/c with a=11.4328(11), b=14.4275(14), c=8.5782(9) Å, , Z=2, R=0.0453. Complex 1 is octahedral in which [Mn(cyclam)]3+ unit occupies the basal plane having two pyridine-2,6-dicarboxylate anions in the axial positions. Molecular packing of the crystal is dominated by string of molecules along the b-axis. The strings are held together by extensive intermolecular hydrogen bonds involving N-H ? O, N-H ? N and O-H ? O which impart it an infinite 1D chain. Complex 2 on the other hand crystallizes in the space group P212121 (No. 19) of the orthorhombic system. Mn(III) ions occupy the center of a distorted octahedron and two chloride ions occupy the axial positions. The packing diagram of 2 reveals that the complex is percholrate-bridged hydrogen bonded 1D chain along a-axis. Cyclic voltammogram of complex 1 shows a reduction wave at −0.25 V coupled to an oxidation wave at −0.05 V versus SCE in aqueous solution. The complex 2 is characterized by an irreversible reduction wave at −0.11 V versus SCE and is identical to that observed for [MnIII(cyclam)Cl2]Cl · 5H2O. The magnetic measurements in the temperature range 1.9-300 K have been carried out for complex 1 which exhibits a very weak ferromagnetic interaction at low temperature. Complex 2 shows room temperature magnetic moment value of 4.92 BM consistent with the high spin d4 electronic configuration. 相似文献
14.
Sophie Romain Marius Retegan Allan G. Blackman Marie-Noëlle Collomb 《Inorganica chimica acta》2011,374(1):187-196
To complete the elucidation of the electrochemical properties of MnII-bis(terpyridine) complexes in CH3CN and evaluate the influence of the bulkiness of the terpy substituents, the oxidation processes of [MnII(L)2]2+ (L = terpy for 2,2′:6′,2″-terpyridine, pTol-terpy for 4′-(4-methylphenyl)-2,2′:6′,2″-terpyridine and tBu3-terpy for 4,4′,4″-tri-tert-butyl-2,2′:6′,2″-terpyridine) have been investigated in aqueous (1 M) CH3CN solution. In this medium, exhaustive oxidations at 1.10-1.20 V versus Ag/Ag+ release two electrons per molecule of initial complex and lead to clean dimerization processes with the quantitative formation of the oxo-bridged binuclear [Mn2IVO2(L)2(H2O)2]4+ complex for L = tBu3-terpy and of the tetranuclear [Mn4IVO5(L)4(H2O)2]6+ complexes for L = terpy and pTol-terpy. The formation of the tetranuclear complex with the tBu3-terpy derivative is prevented by the steric hindrance induced by the bulkiness of the tert-butyl groups, as confirmed by molecular mechanics calculations, as well as by their strong electron-donating properties. All these electrogenerated multinuclear complexes have been fully characterized in solution by UV-vis and electron paramagnetic resonance (EPR) spectroscopy. A markedly improved chemical synthesis of [Mn4IVO5(terpy)4(H2O)2]6+ is also reported. 相似文献
15.
Yilma Gultneh Yohannes T. Tesema Bijan Ahvazi Teshome B. Yisgedu Ray J. Butcher 《Inorganica chimica acta》2006,359(14):4463-4469
The synthesis, structure and characterization of the dinuclear Mn(II) complex [Mn2(LO)(μ-OAc)2](ClO4) (1) where LOH = 2,6-bis{bis(2-(2-pyridyl)ethyl)aminomethyl)}-4-methylphenol are reported. The reaction of Mn(ClO4)2 · 6H2O with the dinucleating ligand LOH and H3CCOONa in the presence of NEt3 in dry, degassed methanol and under an argon atmosphere, yields 1 as a colorless powder. The crystal structure of 1, determined by X-ray diffraction methods, shows a dinuclear Mn(II) complex in which two Mn(II) ions, each in six-coordinate approximate octahedral coordination, are bridged by the phenolate oxygen of LO− and by two acetate ions in a syn,syn-1,3-bridging mode. The Mn-Mn distance is 3.557(1) Å and Mn-Ophenolate-Mn angle is 112.50(9)°. Cyclic voltammetry of 1 in acetonitrile solution shows a quasi-reversible wave at E1/2 = 0.65 V, for the Mn2(II,II)/Mn2(II,III) redox process, and an irreversible oxidation peak at Ep,c = 1.22 V versus Ag/AgCl for the Mn2(II,III) to Mn2(III,III) oxidation process. Controlled potential electrolysis of 1 in acetonitrile solution at 0.85 V (versus Ag/AgCl) takes up 1 F of charge per mole of 1 to yield a brown solution of the Mn2(II,III) state of the complex, which, however, is unstable and reverts back to the Mn2(II,II) state in solution at room temperature. Least square fitting of the variable temperature magnetic susceptibility measurements on powdered sample of 1 is obtained with g = 1.888, J = −2.75 cm−1, Par = 0.008, TIP = 0. The low −J value and the room temperature calculated magnetic moment of the complex (5.30 BM per Mn(II)), which is less than the spin-only moment of Mn(II), show that the two Mn(II) ions are weakly antiferromagnetically coupled. 相似文献
16.
Monika Moszner 《Inorganica chimica acta》2004,357(12):3613-3620
The decaaqua-di-rhodium(II) cation has been found to be an interesting starting material in the preparation of dioxygen complexes with different N-donor ligands. Treatment of aqueous HClO4 solution of [Rh2(H2O)10]4+ with NH4OH/NH3, py and/or en results in water exchange and the formation of corresponding [Rh2II(H2O)10−m(base)n(OH)m](4−m)+ derivatives. Reaction of the latter with dioxygen afforded superoxo and/or peroxo complexes, depending on reaction conditions: [Rh2III(O2 −)(NH3)8(OH)2](ClO4)3 (1), [Rh2III(O2 −)(NH3)8(OH)(H2O)](ClO4)4 (2), [Rh2III(O2 2−)(NH3)10](ClO4)4 · 6H2O (3), [Rh2III(O2 −)(py)8(H2O)2](ClO4)5 (4), [Rh2III(O2 2−)(en)4(H2O)2](ClO4)4 (5) and [Rh2III(O2 −)(en)4(H2O)2](ClO4)5 (6). All the obtained complexes were characterized by elemental analysis, mass spectrometry, UV-Vis, IR and ESR spectroscopies and magnetic measurements. 相似文献
17.
Yoshimasa Hoshino Motoki Eto Yasuhiko Yukawa Akira Endo G.P Satô 《Inorganica chimica acta》2004,357(2):600-604
Two mononuclear mixed-ligand ruthenium(III) complexes with oxalate dianion (ox2−) and acetylacetonate ion (2,4-pentanedionate, acac−), K2[Ru(ox)2(acac)] (1) and K[Ru(ox)(acac)2] (2), were prepared as a candidate for a building block. In fact, reaction of complex 2 with manganese(II) sulfate gave a heterometallic tetranuclear complex, TBA[MnII{(μ-ox)RuIII(acac)2}3] (5) in the presence of tetrabutylammonium (TBA) bromide. The 1H NMR, UV-Vis, selected IR and FAB mass spectral data of these complexes are presented. Both mixed-ligand ruthenium(III) complexes gave a Nernstian one-electron reduction step in 0.1 mol dm−3 Na2SO4 aqueous solution on a mercury electrode at 25 °C. Comparison of observed reversible half-wave potentials with calculated values for a series of [Ru(ox)n(acac)3 − n]n− (n=0-3) complexes by using Lever’s ligand electrochemical parameters is presented. 相似文献
18.
Barbara J Keller Steven O Dunham Edwin H Abbott Eric S Peterson 《Inorganica chimica acta》2004,357(3):853-858
The reaction between [PtII(Ox)2]2− and an appropriate oxidant resulted in the formation of the dimeric unbridged platinum complex [{PtIII(Ox)2 }2]2− where (Ox) is oxalate. This complex was moderately stable under ambient conditions and was studied via a variety of NMR and spectrophotometric techniques. Reaction of the [{PtIII(Ox)2}2]2− complex with [PtII(Ox)2]2− in the presence of H+ lead to the formation of a series of longer platinum oligomers with non-integral oxidation states, culminating in the formation of partially oxidized platinum polymers of general formula [{Pt(Ox)2}n]n−. The concentration of H+ was an important factor leading to higher oligomers and the approximate number of protons associated with each oligomer was determined. The analogous [{PtIII(Mal)2}2]2− complex, where (Mal) is the malonate anion, was also synthesized and studied but was shown to be significantly less stable. 相似文献
19.
Thengarai S. Venkatakrishnan Carine Duhayon Nayanmoni Gogoi Jean-Pascal Sutter 《Inorganica chimica acta》2011,372(1):403-406
The self assembly of [FeIII(L)]Cl2ClO4 (L = pentadentate macrocyclic ligand) with octacyano metallates [MIV(CN)8]4− (M = Mo, W) leads to bimetallic cyano-bridged 2-D coordination polymers of formula [{Fe(L)}3{M(CN)8}2]Cl·xH2O with M = Mo (2), or W (3). The structure of the tungsten analogue has been established by single crystal X-ray diffraction. The magnetic properties for both Mo and W derivative are reported. 相似文献
20.
By employing the common precursor Na3[Fe(CN)5(NH3)]·3H2O in a new synthetic approach, the azidopentacyanoferrate(III) ion has been isolated and structurally characterized as (Ph4As)2[Na(H2O)4][Fe(CN)5(N3)] 1. In order to confirm its building block ability, compound 1 has been reacted with the mononuclear complex [Mn(valphen)(H2O)2]ClO4 (H2valphen represents the Schiff base resulting from the condensation of o-vanillin with 1,2-phenylenediamine in a 2:1 M ratio) to afford the new MnIII-FeIII heterometallic system [Mn(valphen)(H2O)2]2[(H2O)(valphen)Mn(μ-CN)Fe(CN)4(N3)]·8H2O 2. The crystal structure of compound 2 reveals a supramolecular assembly generated by [(H2O)(valphen)Mn(μ-CN)Fe(CN)4(N3)]2− dianions and discrete [Mn(valphen)(H2O)2]+ counterions. The dynamic magnetic measurements of compound 2 point to a slow relaxation of the magnetization. 相似文献