金属醇盐配合物与纳米钛酸铅的制备

在C[(Bu4)Br]=0．03mol／L的乙醇溶液中，保持温度50℃电解钛片4h，40℃电解铅片2h，每隔30min；0．1mL乙酰丙酮，制得铅、钛金属醇盐PbTi(OCH2CH3)(6-y)(acac)y，采用红外、拉曼光谱等测试技术对纳米PbTiO3前驱体进行了表征。前驱体中含有乙酰丙酮基团(acac^-)。凝胶经乙醇洗涤、真空干燥24h后，700℃煅烧2h制得纳米PbTiO3粉体。采用X-射线衍射、电子透射技术等手段对纳米PbTiO3进行了表征，干凝胶粒径为10nm，纳米PbTiO3粒径为10-15nm。     

Syntheses and Crystal Structures of Two Inorganic–Organic Hybrid Frameworks Constructed from Pyridine-2,5-Dicarboxylic Acid

Two novel inorganic–organic hybrid frameworks of [Co(2,5-pydc)(4,4′-bipyo)_0.5(H₂O)₃ · 3H₂O] _n (1) and [Cu_1.5Gd(2,5-pydc)₃(2,2′-bipyo)(H₂O)₄ · 2H₂O] _n (2) (2,5-pydc = pyridine-2,5-dicarboxylic acid; 4,4′-bipyo = 4,4′-bipyridine-N,N′-dioxide; 2,2′-bipyo = 2,2′-bipyridine-N,N′-dioxide) were prepared. Both compounds have been characterized by the elemental analyses, IR spectra, TG analysis and the single crystal diffraction. The salient structural feature for both compounds 1 and 2 is that the 1D chain and the mononuclear fragment are connected by strong hydrogen bond interactions to form 2D structure.     

An easy entry to novel early–late oligonuclear transition metal complexes containing π-conjugated systems

Heterotrinuclear Ti–Cu–Ru (5) and heterotetranuclear Ti–Cu–Pt–Fe (7) containing complexes are accessible by using {[Ti](CC^tBu)₂}CuMe (1) ([Ti]=(η⁵-C₅H₄SiMe₃)₂Ti) as key molecule; in 5 and 7, the corresponding early and late transition metal atoms are linked by π-conjugated organic moieties.     

Laser-induced heterometallic phase deposition from solutions of supramolecular complexes

Heterometallic (Au–Cu) phase precipitation on the surface of soda-lime glass as a result of laser-induced chemical liquid phase deposition (LCLD) is demonstrated for the first time. The precipitation of heterometallic structures was carried out under Ar⁺ laser irradiation from the solutions of supramolecular complexes. Energy dispersive X-ray (EDX) analysis showed that the deposits consist of both Au and Cu. Morphology of the deposited structures was found to be dependent on the used solvents: delocalized sparse surface structures in the case of the dichloromethane solution, close packed nanoparticles for the dimethyl formamide and homogeneous phase with nano-pores for the acetone solution. In accordance to the SEM photos and scan EDX analysis the homogeneous heterometallic phase with fixed Au/Cu ratio was achieved for the acetone solution of supramolecular complex. The observed formation of the heterometallic phase was explained by the laser-initiated intramolecular reduction process of the supramolecular metal core.     

The production of flower-like NiFe2O4 superstructures consisting of nanosheets via the thermolysis of a heterometallic oxo-centered trinuclear complex

Flower-like NiFe₂O₄ superstructures consisting of nanosheets have been successfully synthesized by direct thermolysis of a heterometallic oxo-centered trinuclear complex [NiFe₂O(CH₃COO)₆(H₂O)₃·2H₂O] (NiFe-HOTC) at 400 °C for 6 h in a horizontal tube furnace. The composition and structure of the products were investigated by X-ray diffraction (XRD) and infrared spectra (IR). XRD analysis revealed a pure ferrite phase with high crystallinity. Morphological investigation by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed NiFe₂O₄ flowers with average diameter varying from 0.5 to 3 μm consist of nanosheets with average edge length in the range of 60-300 nm and thickness of about 30 nm. Furthermore, energy dispersive X-ray analysis (EDX) demonstrated that the atom ration of Ni, Fe and O is 1:2:4. In addition, magnetic measurements showed that the obtained flower-like NiFe₂O₄ are ferromagnetic at room temperature.     

A 3D Gd–Ag coordination polymer constructed from pyridine-3,5-dicarboxylic acid: Synthesis, crystal structure and magnetic properties

A novel heterometallic coordination polymer, [AgGd(PDC)₂]·2H₂O (1) (H₂PDC = pyridine-3,5-dicarboxylic acid), have been synthesized under hydrothermal conditions, and characterized by elemental analysis, IR, thermogravimetric analysis and single-crystal X-ray diffraction. Complex 1 features an unusual three-dimensional network structure in which infinite gadolinium-carboxylate chains are linked by [Ag(PDC)₂]³⁻ metalloligands to form a mixed-metal coordination network. Moreover, the luminescent properties and magnetic properties of 1 have also been investigated.     

The syntheses of 3d–3d mixed heterometallic coordination polymers with magnetic properties

Novel 3d–3d heterometallic metal-organic frameworks, [M(ox)(bipy)] (1, M = Co and Zn; 2, M = Co and Cd; ox = oxalate, bipy = 4,4-bipyridine), have been synthesized by using two bidentate ligands under hydrothermal conditions. The Co(II) and Zn(II) ions in 1, and Co(II) and Cd(II) in 2 are location disordered, with a molar ratio of 0.72:0.28, and 0.96:0.04, respectively. The co-existence of the two metal ions in the structures makes them more thermally stable than previously reported homometallic polymers of Co(II) or Zn(II) ions. Compound 1 exhibits weaker antiferromagnetism than the pure Co(II) complex owing to the incorporation of Zn(II).     

A 3D 3d-4f Heterometallic Coordination Polymer: Synthesis,Crystal Structure and Properties

Abstract  A three-dimensional heterometallic coordination polymer formulated as Sm₂Zn₂(BIPA)₅(H₂O)₂ (1) (H₂BIPA = 5-bromoisophthalic acid) was synthesized by hydrothermal reaction of H₂BIPA with Sm₂O₃ and Zn(NO₃)₂. Complex 1 shows an 8-connected (3⁶.4¹⁸.5³.6) topological network. The thermal analysis of complex 1 has been measured and discussed. Additionally, the photoluminescent property of complex 1 was investigated. Graphical Abstract  An intriguing feature of complex 1 is a 3D eight-connected framework of 3⁶.4¹⁸.5³.6 topology.