氮氧自由基-锌配合物[Zn(NIT3Py)2Cl2]的合成、结构和磁行为

A Zn(Ⅱ) complex with nitronyl nitroxide radicals [Zn(NIT3Py)₂Cl₂] (1) (NIT3Py=2-(3′-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction crystal structure determination method. The complex has a mononuclear-metal structure in which each Zn(Ⅱ) ion adopts a distorted tetrahedral geometry and is coordinated by two Cl^- anions and two pyridyl-N atoms from two NIT3Py radical ligands. The magnetic measurements show the weak antiferromagnetic interaction between the nitroxide radicals through the diamagnetic Zn(Ⅱ) ion. CCDC: 292363.     

A Novel 3D Heterobimetallic Cyano-bridged Coor- dination Polymer {(NH_4)_2[Cd(H_2O)Fe(CN)_6]}_n:Synthesis and Crystal Structure

A novel heterobimetallic coordination polymer, {(NH4)2[Cd(H2O)Fe(CN)6]}n 1, has been synthesized by using the slow diffusion method and structurally characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. The crystal crystallizes in the monoclinic system, space group P21/n, a = 7.4202(16), b = 14.939(3), c = 10.868(2) A and ? = 91.660(3)A. For 1, five CN groups of Fe(CN)6]4- are involved in bridging. The polymer displays a 3D open microporous framework with 5-connected uninodal(46.64) topology.     

Ag2CO3/Bi2O2CO3光催化剂的p-n异质结构筑及活性研究

采用先后沉淀法制备了Ag₂CO₃/Bi₂O₂CO₃(BOC)复合光催化剂. 扫描电子显微镜和透射电子显微镜表征结果表明, 尺寸为8.0~18.5 nm的Ag₂CO₃颗粒均匀分散于BOC纳米片表面. 两种半导体之间所形成的良好p-n异质界面效应拓宽了BOC的光吸收范围, 并有效促进了光生电子-空穴对的分离. Ag₂CO₃/BOC复合光催化剂的催化活性明显提高, 其中Ag₂CO₃含量(质量分数)为0.62%时活性最佳, 降解罗丹明B的速率常数为纯BOC的2.8倍. 结合催化过程中的活性物种研究和两种半导体的相对能带位置, 提出了p-n异质界面空间电荷层的形成以及载流子分离和迁移机制.     

Syntheses and Crystal Structures of Two Cadmium(Ⅱ) Compounds Linked by N,N-Bis(3-pyridylmethyl)amine

Two cadmium(Ⅱ) compounds linked by a flexible dipyridyl ligand {[Cd2(Hbpma) Cl5(H2O)]·2H2O}n 1 and [Cd(Hbpma)Cl(H2O)2]2·2SO4·3H2O 2 (bpma = N,N-bis(3-pyridylmethyl)amine) have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P with a = 9.5612(6), b = 11.3401(7), c = 11.5069(12), α = 112.8540(10), β = 106.5330(10), γ = 101.6680(10)°, V = 1030.77(14)3, C12H20Cd2Cl5N3O3, Mr = 656.36, Z = 2, Dc = 2.115 g/cm3, μ(MoKα) = 2.727 mm-1, F(000) = 636, S = 1.059, the final R = 0.0319 and wR = 0.0822 for 3443 observed reflections (I > 2σ(I)). For complex 2, it belongs to triclinic, space group P with a = 10.9487(4), b = 11.4197(4), c = 15.4288(5), α = 94.7470(10), β = 104.1000(10), γ = 104.42°, V = 1790.76(11)3, C24H42Cd2Cl2N6O15S2, Mr = 1014.46, Z = 2, Dc = 1.881 g/cm3, μ(MoKα) = 1.529 mm-1, F(000) = 1020, S = 1.050, the final R = 0.0178 and wR = 0.0451 for 6026 observed reflections (I > 2σ(I)). Complex 1 is found to have tetranuclear Cd(Ⅱ) clusters which are bridged by the protonated bpma ligands leading to one-dimensional coordination polymers, whereas complex 2 consists of binuclear Cd(Ⅱ) structures linked by the protonated bpma ligands. Both complexes are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions.     

Heterometallic Trinuclear Ni2Zn and Ni2Mn Complexes of Macrocyclic Oxamide: Synthesis and Crystal Structures

Two novel heterometallic trinuclear complexes of macrocyclic oxamide [Mn(NiL)2(HBTC)H2O] (1) and [Zn(NiL)2(HBTC)H2O] (2) (NiL, H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien, H3BTC = 1,3,5-benzenetricarboxylic acid) have been solvothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. For 1, the crystals crystallize in the monoclinic system, space group P21/c with a = 11.3595(5), b = 23.1498(11), c = 17.2558(8) and =101.2530(10)°. For 2, the crystals crystallize in the monoclinic system, space group P21/c with a = 11.5214(8), b = 20.6566(14), c = 18.4126(13)  and = 92.6770(10)°. The structures of 1 and 2 have oxamido-bridged trinuclear [NiⅡ2MⅡ] units and consist of two-dimensional supramolecular architectures formed by strong O-H…O intermolecular hydrogen bonds.     

可见光响应型Bi2WO6光催化剂

Bi₂WO₆作为一种新型半导体光催化剂,具有较窄的带隙宽度和特殊的层状结构,因而显示出良好的可见光催化性能。本文综述了围绕提高Bi₂WO₆的光催化活性和实用性而开展的相关研究成果,包括:纳米结构Bi₂WO₆材料;分级超结构Bi₂WO₆材料;Bi₂WO₆光催化剂的系列修饰改性,如金属氧化物复合、碳烯和金属单质的表面沉积,以及金属离子和非金属离子的掺杂等。此外,还从回收角度综述了Bi₂WO₆的固定化技术。最后对Bi₂WO₆光催化剂的发展趋势进行了展望,强调对Bi₂WO₆进行带隙调控,并加强对其异质结构界面状态的研究,通过理论计算可深入理解光催化机制,以从制备入手指导现有催化剂的改良和设计新型光催化剂。     

大环草酰胺配合物CuC33H28Cl2N4O3的合成和晶体结构(英)

A novel macrocyclic oxamide complex CuL (L=C₃₃H₂₈Cl₂N₄O₃) has been synthesized and characterized by elemental analysis, IR spectrum, UV-Visible spectrum and single crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P2₁/n. The lattice parameters are: a=0.848 8(3) nm, b=1.904 9(7) nm, c=1.868 1(7) nm, β=92.794 (6)° and V=3.016 8(19) nm³, Z=4. The results show that the coordination geometry around copper(Ⅱ) in the complex is aberrant tetragonal-plane. CCDC: 265601.     

Synthesis,Crystal Structure and Magnetic Property of a New Cd（Ⅱ） Complex with Four Nitronyl Nitroxide Radicals

A new Cd(Ⅱ) complex with four nitronyl nitroxide radicals [Cd(NIT4Py)4Cl2](NIT4Py = 2-(4'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in triclinic,space group P1 with a = 7.2441(4),b = 13.6964(8),c = 13.7354(8) ,α = 89.8610(10),β = 77.9180(10),γ = 87.2250(10)°,V = 1331.01(13) 3,C48H64CdCl2N12O8,Mr = 1120.41,Z = 1,Dc = 1.398 g/cm3,μ(MoKα) = 0.573 mm-1,F(000) = 582,S = 1.043,the final R = 0.0257 and wR = 0.0641 for 4333 observed reflections(I > 2σ(I)).The title complex exists in the mononuclear-metal structures,in which each Cd(Ⅱ) ion adopts a distorted octahedral geometry and is coordinated by two Cl-anions and four pyridyl-N atoms from four NIT4Py ligands.The magnetic measurements show weak antiferromagnetic interactions between the nitroxide radicals.     

两个以大环草酰胺为主配体的多核铜及镍配合物的合成及晶体结构

本文利用大环草酰胺与2,2′-联吡啶、间苯二甲酸共配设计并合成了2个同多核配合物[Cu₂L(2,2′-bipy)(H₂O)(ClO₄)]ClO₄ (1)和[Ni₃L₂(ipt)(H₂O)]H₂O (2)(ipt=isophthalic acid,H₂L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-diene),并利用单晶X-射线结构分析、红外对该配合物进行了结构表征,研究了其荧光性质。结构分析表明,配合物1为单斜晶系,空间群为P2₁/n,a=1.413 1(17) nm,b=1.091 7(13) nm,c=2.325 4(19) nm,β=119.35(5)°,Z=4。配合物2为单斜晶系,空间群为P2₁/c,a=1.159 7(2) nm,b=2.059 9(4) nm,c=1.847 7(4) nm,β=90.788(3)°,Z=4。配合物1和2分别是通过草酰胺桥联的双核、三核配合物,并通过氢键分别构成三维、二维超分子结构。