Yan-Ping Ren

Trigonal bipyramidal Dy5 cluster exhibiting slow magnetic relaxation.

A pentanuclear dysprosium cluster, [Dy(5)(μ(3)-OH)(6)(Acc)(6)(H(2)O)(10)]·Cl(9)·24H(2)O (1), has been synthesized through the reaction of 1-amino-cyclohexanel-carboxylic acid (Acc) and DyCl(3)·5H(2)O. Crystal structural analysis reveals that the metal core of cluster 1 shows an unprecedented trigonal bipyramidal (TBP) geometry. Magnetic studies indicate that the Dy(5) cluster exhibits slow magnetic relaxation.

Ionothermal synthesis of 3d–4f and 4f layered anionic metal–organic frameworks

A La(III)–Co(II) heterometallic framework and a La(III)-based anionic layered architecture were prepared under ionothermal conditions.

Solvothermal Synthesis of Four Polyoxometalate-Based Coordination Polymers Including Diverse Ag(I)···π Interactions

Four 3D POM-based silver coordination polymers, namely, [Ag17(ptz)11(PW12O40)2]n (1), [Ag17(ptz)11(PMo12O40)2]n (2), [Ag12(ptz)6(CN)2(SiW12O40)]n (3), and [Ag19(ptz)8(H2ptz)(H3ptz)(AgP5W30O110)·7H2O]n (4), have been obtained by solvothermal reaction of AgNO3 and 5-phenyl-1H-tetrazole (Hptz) ligand in the presence of four types of polyoxometalates. Structural analysis shows that four types of Ag(I)···π interactions, m-η(1), m/p-η(2), o/m-η(2), and o/m/p-η(3), were observed in compounds 1-4, depending on the polyoxometalates used. The in situ generated CN(-) ion in compound 3 shows unprecedented mixed σ and π bonding modes, similar to the C2(2-) ion in well-studied silver acetylides. For 4, the Na(+) ion in the Preyssler heteropolyoxoanion, [NaP5W30O110](14-), was exchanged by Ag(I) under solvothermal conditions, generating a novel [AgP5W30O110](14-) anion. In addition, the photoluminescence behavior of 1-4 was also investigated.

Influence of reaction conditions on the channel shape of 3d-4f heterometallic metal–organic framework

Three structural kinds of 3d-4f metal–organic-frameworks (MOFs), {[Ln4(ox)3(Ni(IDA)2)3(H2O)6]}n·xnH2O (Type I: LnLa, Nd, Eu, Gd; IDA = iminodiacetate, ox = oxalate), {[Ln2 (ox)(Ni(IDA)2)2(H2O)2]}n·2nH2O (Type II: LnLa, Pr, Nd, Eu) and {[Dy2(ox)2Ni(IDA)2(H2O)2]}n·2nH2O (Type III), have been synthesized under hydrothermal condition. The crystal structures consist of Ln-oxalate tetramers for Type I, dimers for Type II and one-dimensional polymers for Type III bridged by the metalloligand [Ni(IDA)2]2−. While Type I contains a mixture of “Ln6Ni4-parallelogram” (A-Type) and “Ln6Ni2-parallelogram” (B-Type) channels, Type II and Type III contain only A-type and B-type channels, respectively. A fairly high stability of the MOFs is indicated by thermogravimetric analyses and reversible dehydration and rehydration of guest water molecules, which is confirmed by single crystal-to-single crystal transformation of 1 and 5.

Guest controlled coordination framework: syntheses, crystal structures and thermal properties of two three-dimensional structures of [Ce2(adipate)3(OH2)4]·6H2O and

Abstract Syntheses, crystal structures and thermal properties of two three-dimensional structures of [Ce2(adipate)3(OH2)4]·6H2O (1) and [ Ce 2 ( adipate ) 3 ( OH 2 ) 4 ]·4 H 2 O ·( adipic acid ) (2) were reported. Single-crystal structures show that the central cerium(III) atom in 1 is ennea-coordinated by two bidentate adipate ligands, three monodentate adipate ligands and two water molecules; while the central cerium(III) atom in 2 is 10-coordinated by three bidentate adipate ligands, two monodentate adipate ligands and two coordinated water molecules. The difference between 1 and 2 was discussed based on the crystal structures, which shows that guest molecule can adjust pore-size of coordination polymers.

Two Triazole-Based Metal–Organic Frameworks Constructed from Nanosized Cu20 and Cu30 Wheels

Two metal-organic frameworks constructed from nanosized Cu(20) and Cu(30) wheels have been obtained under hydrothermal conditions based on 1,2,3-triazole and 1-H-1,2,3-benzotriazole, respectively. Crystal structure analysis shows that their differences in the size and nuclearity of Cu(20) and Cu(30) wheels are attributed to the steric effect of ligands.

A unique three-dimensional coordination polymer constructed from 4,4 '-biphenyldicarboxylate and zinc(II)

Abstract Zinc(II) coordination polymer [Zn(bpdc)]n (bpdc=4,4′-biphenyldicarboxylate) (1) with a unique entanglement PtS structure was synthesized by hydrothermal reaction of zinc nitrate and 4,4-biphenyldicarboxylic acid in aqueous sodium hydroxide solution.

The influence of water on dielectric property in cocrystal compound of [orotic acid][melamine]·H2O

An organic cocrystal compound consisting of melamine, orotic acid and water molecules was synthesized under hydrothermal conditions. Investigation of its temperature- and frequency-dependent dielectric behaviors reveals that the fluctuation of hydrogen atoms of water molecules between the layers plays a key role in its dielectric anomaly.

Three Giant Lanthanide Clusters Ln37 (Ln = Gd, Tb, and Eu) Featuring A Double-Cage Structure

Three homometallic high-nuclearity clusters, formulated as [(CO3)2@Ln37(LH3)8(CH3COO)21(CO3)12(μ3-OH)41(μ2-H2O)5(H2O)40]·(ClO4)21·(H2O)100 (abbreviated as Ln37, Ln = Gd (1); Tb (2); Eu (3), LH3 = 1,2,3-cyclohexanetriol) and featuring a double cage-like structure, were obtained through the reaction of 1,2,3-cyclohexanetriol, acetate ligand, and Ln(ClO4)3. The largest odd-numbered lanthanide cluster Gd37 exhibits an entropy change (-ΔSm) of 38.7 J kg-1 K-1.

Anion-Dependent Assembly of Heterometallic 3d–4f Clusters Based on a Lacunary Polyoxometalate

A series of heterometallic 3d-4f clusters, formulated as Na17[Ln3(H2O)5NiII(H2O)3(Sb4O4)(SbW9O33)3(NiIIW6O24)(WO2)3(CH3COO)]·(H2O)65 [abbreviated as Ln3Ni2, where Ln = La3+ (1), Pr3+ (2), and Nd3+ (3)], K5Na11[Ln3(H2O)3NiII3(H2O)6(SbW9O33)3(WO4)(CO3)]·(H2O)40 [abbreviated as Ln3Ni3, where Ln = La3+ (4), Pr3+ (5), and Nd3+ (6)], and K3Na27[Ln3NiII9(μ3-OH)9(SbW9O33)2(PW9O34)3(CH3COO)3]·(H2O)80 [abbreviated as Ln3Ni9, where Ln = Dy3+ (7) and Er3+ (8)], were obtained through the reaction of the lacunary {SbW9O33} precursor with Ln(NO3)3·6H2O and NiCl2·6H2O in a NaAc/HAc buffer in the presence of different anions. Single-crystal X-ray structure analysis revealed that compounds 1-3 possessed tetrameric architectures featuring three Keggin-type {SbW9O33} and one Anderson-type {NiIIW6O24} building blocks encapsulating one {Sb4O4} cluster, three WO2 units, three Ln3+ metal ions, and two Ni2+ metal ions. Compounds 4-6 displayed cyclic trimeric aggregates of three {SbW9O33} units enveloping one CO32--templated trinuclear [Ln3(CO3)]7+ and one WO42--templated [NiII3(WO4)]+ unit. Compounds 7 and 8 exhibited unique pentameric architectures that featured three 3d-4f cubane clusters of {LnNi3(μ3-OH)3} capped by two {SbW9O33} and three {PW9O34} building blocks. Interestingly, the structural regulation of the heterometallic 3d-4f clusters in the polyoxometalate systems with trimers, tetramers, and pentamers was realized by introducing different anions.