Inorganic Chemistry Communications (v.74, #C)

Contents List (iii-ix).

Selective detection of mercury ions using benzothiazole based colorimetric chemosensor by Bharath Kumar Momidi; Venkatadri Tekuri; Darshak R. Trivedi (1-5).
Three new receptors L1, L2 and L3 were designed and synthesized in a single pot synthesis. The synthesized receptors were characterized by 1H NMR, FT-IR and Mass spectrometry. The cation binding affinity was studied using colorimetric and UV–Vis spectral methods for the three receptors. Receptor L1 showed high selectivity with a significant color change from yellow to colorless (turn-off response) in the presence of Hg2 + ions over the other cations such as, Ni2 +, Cr3 +, Pb2 +, Cu2 +, Cd2 +, Co2 +, Zn2 +  and Fe2 + and the receptor L2, L3 did not show any color change or change in the absorption in UV–Vis spectral studies with Hg2 + ions and other tested metal ions, this may be due to lack of –OH group in receptor L2 and L3. The B-H Plot shown 1:1 complex between L1and Hg2 + ions.Display Omitted
Keywords: Chemosensors; Naked-eye detection and B-H Plot;

Synthesis, characterization and antibacterial properties of two POM-based supramolecular compounds with the natural active ingredient: (THB)3(H5PMo12O40) and (THB)3(H3PW12O40) by Yunan Zhang; Dajun Zhang; Jiayu Zhang; Yu Zhang; Lixin Liu; Xiangyu Zhang; Yanru Feng; Jingquan Sha; Yunjie Zhang; Chaoxing Wang; Yu Shen; Haixue Kuang (6-11).
Two supramolecular compounds of Keggin POMs supporting the natural active ingredient, (THB)3(H5PMo12O40) (1) and (THB)3(H3PW12O40) (2) (THB = tetrahydroberberine), have been synthesized and characterized by X-ray single-crystal diffraction, elemental analyses, IR, XRPD and TGA. A crystallization screening of a series of pH value and stoichiometric ratio combinations was performed in order to investigate the synthetic conditions of two compounds. Compound 1 was synthesized at pH = 1.5 and has a 3:7 stoichiometric ratio, in which THB molecules exist two configurations and link to polyanion via 14 H-bonds. Compound 2 was obtained at a relatively high pH (pH = 2.0) and has the same stoichiometric ratio as 1, in which THB molecules exist only one configuration and link to polyanion via 8 H-bonds. The discrepancies of pH values, and volumes and oxygen basicities of polyanions could significantly affect the number of H-bonds between POMs and THBs, and then the number of H-bonds may affect configurations of THB molecules. This result implicitly indicates that it is providing a new thought and method for chiral resolution of (±)-tetrahydroberberine. Additionally, two title compounds show advantages in terms of antibacterial properties against Staphylococcus aureus and Escherichia coli in comparison to their corresponding parent compounds.In this Graphical Abstract, POM-based supramolecular compounds with tetrahydroberberine (THB), (THB)3(H5PMo12O40) (1) and (THB)3(H3PW12O40) (2), have been synthesized. The discrepancies of pH values, and volumes and oxygen basicities of polyanions could significantly affect the number of hydrogen bonds between POMs and THB, and then the number of hydrogen bonds might have an effect on the configuration of THB molecules. This result implicitly indicates that it is providing a new thought and method for chiral resolution of (±)-THB. Furthermore, two compounds show advantages in terms of antibacterial properties against S. aureus and E. coli in comparison to their corresponding parent compounds.Display Omitted
Keywords: Organic-inorganic hybrid; Keggin polyoxometalates; Tetrahydroberberine; Antibacterial property;

Single-molecule magnet behavior in a tetranuclear cyano-bridged FeIII 2NiII 2 cluster by Cheng-Qi Jiao; Wen-Jing Jiang; Wen Wen; Yi Ren; Jia-Liang Wang; Tao Liu; Cheng He (12-15).
A tetranuclear cyanide-bridged FeIII 2NiII 2 cluster [FeIII(Tp)(CN)3]2NiII 2(4, 4′-dibromo-2, 2′-bpy)4·2ClO4 (1) (Tp = hydrotris(pyrazolyl)borate) was synthesized. Magnetic measurements indicated that this compound displayed single-molecule magnet behavior with the pre-exponential factor of τ 0  = 1.79(8) × 10− 10  s and the relaxation energy barrier of Δ/k B  = 65.1(9) K.A tetranuclear cyanide-bridged FeIII 2NiII 2 cluster [FeIII(Tp)(CN)3]2NiII 2(4, 4′-dibromo-2, 2′-bpy)4·2ClO4 (1) (Tp = hydrotris(pyrazolyl)borate) was synthesized. Magnetic measurements indicated that this compound displayed single-molecule magnet behavior.Display Omitted
Keywords: Cyanide; Tetranuclear structure; Ferromagnetic interactions; Single-molecule magnets;

Three transition metal cluster-based coordination polymers based on 1,4-naphthalenedicarboxylate and pyridine ligands by Guo-Dong Zou; Xin-Xin Huo; Xiao-Chen Yu; Lin Tang; Bo Zhang; Xiao-Ying Huang (16-21).
Three new cluster-based coordination polymers (CPs), namely, [Co2(1,4-NDC)2(py)2(H2O)] (1), [pyH]4[Ni6.5(1,4-NDC)8(OH)(py)4(H2O)3]∙H2O (2) and Zn4(1,4-NDC)3(OH)2(py)2 (3) (1,4-NDCH2  = 1,4-Naphthalenedicarboxylic acid, py = pyridine) have been hydrothermally synthesized and structurally characterized. Compound 1 is constructed from the tetranuclear clusters of [Co4(COOR)8(H2O)2]; while compound 2 contains trinuclear [Ni3(COOR)8(H2O)2]2− or tetranuclear [Ni4(COOR)8(OH)2]2− units owning to the disorder of metal ions. Both compounds feature three-dimensional (3D) structures with the eight-connected bcu networks. Compound 3 is the first 1,4-NDCH2-based 3D CP based on the rarely octanuclear [Zn8(μ 3-OH)4(COOR)12] clusters with the six-connected pcu net. The three compounds are all constructed from the NDC2− and py ligands but their structures are quite different, revealing the significance of metal ions in the structural modulation of CPs. In addition, the thermal stabilities of the three compounds were investigated.Three cluster-based coordination polymers (CPs) have been hydrothermally synthesized and structurally characterized. This work not only reveals the significance of the metal ions in the structure modulation of CPs, but also provides guidance for the design and construction of novel cluster-based CPs.Display Omitted
Keywords: Coordination polymer; Transition metal cluster; Structural modulation; Hydrothermal synthesis;

Amino(-NH2) functionalized zirconium metal-organic framework UiO-66 were synthesized in household microwave oven. The structural properties and morphology of the obtained UiO-66-NH2 nanoparticles were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). UiO-66-NH2 sensor show high selectivity and sensitivity toward Cu2 + over other tested metal ions. In addition, the possible sensing mechanism is also discussed.UiO-66-NH2 nanoparticles have been facilely synthesized under microwave irradiation, and the obtained nanoparticles exhibited strong solid-state fluorescence and were used as sensor for Cu2 + detection.Display Omitted
Keywords: UiO-66-NH2; Metal-organic framework; Fluorescence; Microwave-assisted synthesis; Cu2 +;  Sensor;

Synthesis, structural characterization, opto-electrical properties of Ir(III) complexes with imidazolium-based carbene ligands by Rui Liu; Senqiang Zhu; Hong Shi; Jinyang Hu; Mingliang Shu; Jinfang Liu; Hongjun Zhu (26-30).
A series of Ir(III) complexes with N–heterocyclic carbenes (NHC) ligands (13) were synthesized and characterized. The opto-electrical properties of these complexes were investigated spectroscopically, electrochemically and theoretically. All complexes exhibit ligand-based 1 π,π* transitions in the UV region, 1MLCT absorption in the UV region, and weak low energy 3 π, π* transition in visible region. These complexes all exhibit blue phosphorescence at both room temperature and 77 K, which is dominated by 3 π,π* character. DFT calculation results indicate their lowest unoccupied molecular orbitals (LUMO) from − 0.47 to − 0.33 eV and the highest occupied molecular orbitals (HOMO) from − 4.97 to − 5.33 eV. The opto-electrical properties can be influenced drastically by NHC ligands, which would be useful for rational design of optical functional materials.Three N-heterocyclic carbenes (NHC) Ir(III) complexes were synthesized and their structural, photophysical and electrochemical properties were investigated. Their good electrochemical stability and structure-property correlations could be potential utilized in rational design of optical functional materials.Display Omitted
Keywords: Ir(III) complexes; N-heterocyclic carbenes; Photophysical property; Electrochemistry; DFT;

Reversible solid-state structural transformation of sodium(I) coordination polymer nanorods, prepared by sonochemical procedure, to organosilver coordination polymer nanosheets has been observed upon liquid assisted mechanochemical reaction of compound [Na2(1,5-nds)(H2O)2]n (1), [1,5-H2nds = 1,5-naphthalenedisulfonic acid] with AgNO3. During this conversion, two coordinated H2O molecules were removed from 1 and substituted with two carbon atoms from 1,5-nds2 ligand in 2. Thus organosilver coordination polymer of 2 was formed during this conversion and distorted trigonal-bipyramidal coordination geometry in 1 with NaO5 coordination sphere was converted to distorted tetrahedral geometry in 2 (regarding the C=C group as one donor) with AgO3C2 coordination sphere.Display Omitted
Keywords: Solid-state conversion; Organosilver; Nanorods; Nanosheets; Coordination polymer;

A 2-(2′-hydroxyphenyl)quinazolin-4(3H)-one derived enaminone (QA) has been developed as a fluorescent probe. In PBS buffered (10 mM, pH = 7.4) water solution, QA displays high selectivity to Pd2 + over other metal ions with a complete fluorescence quenching at 538 nm. Probe QA interacts with Pd2 + through a 1:1 binding stoichiometry with a detection limit of 4.85 × 10− 7  M. Potential applications of QA for Pd2 + detection in real water samples and living cell imaging were also investigated.A 2-(2′-hydroxyphenyl)quinazolin-4(3H)-one derived enaminone (QA) as fluorescent probe for Pd2 + in water solution (PBS 10 mM, pH = 7.4) has been developed.Display Omitted
Keywords: Pd2 + recognition; Quinazolin-4(3H)-one; Enaminone; Cell imaging;

Synthesis of oxygen deficient BiOI for photocatalytic degradation of methyl orange by Zhizhong Chen; Jianxiang Liao; Yuxin Chen; Jingcheng Zhang; Wenjie Fan; Yongchao Huang (39-41).
Oxygen defects are introduced into BiOI by a simple glycerol treatment. This deficient BiOI demonstrated 3.5 times higher photocatalytic performance than the untreated BiOI nanosheets for methyl orange (MO) degradation under visible light irradiation. Moreover, the deficient BiOI nanosheets have excellent cycling stability. The improved efficiency can be ascribed to the significantly enhanced separation efficiency of photogenerated and utilized more solar light.Display Omitted
Keywords: Bismuth oxyiodide; Photocatalysis; Oxygen defects; Visible light; Methyl orange;

Two isonicotinate-bridging lanthanide substituted phosphotungstate hybrids by Yanyan Li; Yajie Liu; Peijun Gong; Xuemeng Tian; Jie Luo; Junwei Zhao (42-47).
Two organic–inorganic hybrid isonicotinate-bridging lanthanide substituted phosphotungstates [H2N(CH3)2]8[Ln(H2O) (INA)(α-HPW11O39)]2·14H2O (Ln = HoШ for 1, ErШ for 2) (HINA = isonicotinic acid) have been obtained by reaction of the Na9[α-PW9O34]·16H2O precursor, Ln(NO3)3·6H2O, C2H7N·HCl and HINA in aqueous solution and structurally characterized by elemental analyses, IR spectra, single-crystal X-ray diffraction and thermogravimetric analysis. Isostructural 1 and 2 consist of one inorganic–organic hybrid dimeric {[Ln(H2O)(INA)(α-HPW11O39)]2}8 − core constituted by two symmetrically mono-Ln substituted Keggin subunits [Ln(H2O)(INA)(α-HPW11O39)]4 − bridged by two INA ligands in the (η2,μ-1,1) fashion. Intriguingly, adjacent hybrid dimeric {[Ln(H2O)(INA)(α-HPW11O39)]2}8 − cores can be extended into a 2-D supramolecular layer via hydrogen bonding interactions. To our knowledge, 1 and 2 represent the first isonicotinate-bridging dimeric mono-lanthanide substituted phosphotungstates. Furthermore, the solid-state fluorescence properties and lifetime decay behaviors of 1 and 2 in visible and near-infrared regions have also been investigated in detail.Two organic–inorganic hybrid isonicotinate-bridging lanthanide substituted phosphotungstates were successfully synthesized and their solid-state fluorescence properties were also investigated.Display Omitted
Keywords: Organic–inorganic hybrid; Phosphotungstate; Photoluminescence; Isonicotinate;

A cobblestone-like dodecanuclear cobalt phosphonate by Ye Xu; Ming Chen; Jing Huang; Xiaoyan Tang; Wenyu Yin; Yunsheng Ma; Rongxin Yuan (48-51).
A cobblestone-like dodecanuclear cobalt cluster was synthesized based on a bulky phosphonate ligand. Magnetic study shows that antiferromagnetic interactions are mediated between the metal ions.Display Omitted

Synthesis of a series of benzazaboroles as selective fluorescent receptors for iodide by Rui Zhang; Yun-Di Zhang; Li-Xia Wang; Chun-Hua Ge; Zhi-Yan Ma; Jin-Peng Miao; Xiang-Dong Zhang (52-57).
In this paper, four benzazaborole type receptors were synthesized by a one-pot reaction of between 2-formylphenylboronic acid and a primary amine in the presence of diethyl phosphite and tested as fluorescent receptors for iodide. All compounds were characterized by IR, 1H NMR, MS, UV and FL techniques. The crystal structures of three of these compounds were obtained by X-ray crystallographic study. These receptors exhibit strong fluorescence intensity in a phosphate buffer solution and their fluorescence can be quenched with added iodide. Under optimized conditions, the newly synthesized fluorescent sensor can selectively detect iodide ion. A linear response in the Stern-Volmer plot within a total concentration range of 0.02 mM to 0.1 mM was observed, indicating a highly efficient fluorescent quenching as a result of the interaction between iodide and the benzazaborole receptors. Interestingly, when an ozone (O3) atmosphere was introduced to the solid powder containing the receptor quenched by iodide, the fluorescence intensity of the system could be partially restored. Theoretical calculations based on DFT were carried out for the complex of receptor 2 and iodide in order to understand the effect of the receptor-bound-iodide anion on the emission spectra of the receptor.The benzazaborole receptors exhibited an “on-off-on” switch during the detection of iodide and O3 with high selectivity.Display Omitted
Keywords: Benzazaborole; Iodide; Fluorescence; Ozone; DFT calculations;

Herein, we report on the syntheses, crystal structures, and optical properties of two new selenidostannates, namely, [Emim]5[Sn3Se7]2Cl (1, Emim = 1-ethyl-3-methylimidazolium) and [Bzmim]2[Sn3Se7] (2, Bzmim = 1-benzyl-3-methylimidazolium). The ionic liquids (ILs) of [Emim]Cl with a short ethyl chain and [Bzmim]Cl with a bulky substituent benzyl group were used in the syntheses of compounds 1 and 2, respectively. Although both the structures feature an anionic lamellar [Sn3Se7] n 2n layer, the packing of the layers are dramatically different; such structural diversity may be ascribed to the difference of structure-directing cations incorporated in between the layers, that is [(Emim)3Cl]2+ aggregates in 1 and bulky [Bzmim]+ in 2, respectively.Two new selenidostannates with different packing of layered [Sn3Se7] n 2n- were obtained directed by aggregated cationic complex of [(Emim)3Cl]2 + and imidazolium cation, respectively.Display Omitted
Keywords: Ionic liquids; Crystal structure; Selenidostannate; Aggregated cations;

Sequential detection of copper(II) and cyanide by a simple colorimetric chemosensor by Ji Hye Kang; Seong Youl Lee; Hye Mi Ahn; Cheal Kim (62-65).
A simple colorimetric receptor 1 based on the combination of N-(5-nitro-2-pyridyl)-1,2-ethanediamine and 4-(diethylamino)-2-hydroxybenzaldehyde was synthesized for the sequential detection of Cu2 + and CN. The receptor 1 showed a distinct color change toward Cu2 + from colorless to yellow. The detection limit of 1 for Cu2 + (0.88 μM) was much lower than the World Health Organization guideline (31.5 μM) as the maximum allowable copper concentration in drinking water. In addition, 1-Cu2 + complex could be used to detect cyanide by showing a color change from yellow to colorless, indicating the recovery of 1 from 1-Cu2 +. Furthermore, the sensing mechanism of 1 for Cu2 + was supported by theoretical calculations.Display Omitted
Keywords: Colorimetric chemosensor; Sequential detection; Copper; Cyanide; Theoretical calculations;

Characterization and magnetic properties of two novel copper(II) coordination polymers prepared by different synthetic techniques by Miroslav Almáši; Vladimír Zeleňák; Adriana Zeleňáková; Zuzana Vargová; Ivana Císařová (66-71).
Two novel ternary Cu(II) coordination polymers with formulas {[Cu(μ2-AZPY)(H2BTC)2]}n (1) and {[Cu(μ2-AZPY)(μ2-HBTC)(H2O)]·AZPY}n (2) (AZPY – trans-4,4′-azobis(pyridine), BTC – benzene-1,3,5-tricarboxylate) have been synthesized using the solvothermal or diffusion techniques, respectively. Compounds were characterized by single crystal X-ray diffraction, thermogravimetry, infrared spectroscopy, elemental analysis and AAS. Removal of water and AZPY from the framework of 2 was investigated by wide-angle X-ray scattering measurements during in-situ heating. A magnetic study showed on antiferromagnetic coupling in 1 and 2 and magnetic properties may be influenced by both crystal field (CF) and inter-molecular interactions. The effective magnetic moment decreases from the values μeff  = 4.97 μB for 1 and μeff  = 3.39 μB for 2 at T = 290 K to the values of μeff  = 1.41 μB for 1 and μeff  = 1.27 μB for 2 at T = 2 K. The origin of the observed behavior is discussed.Using the same building blocks (copper(II) nitrate trihydrate, 4,4′-azobis(pyridine) and benzene-1,3,5-tricarboxylic acid) but different synthetic procedures (solvothermal or diffusion techniques) two novel Cu(II) coordination polymers were synthesized and their magnetic properties were investigated.Display Omitted
Keywords: Copper(II); 4,4′-azobis(pyridine); Trimesate; Thermal analysis; Wide-angle X-ray scattering; Magnetism;

Alkali salts of organic-inorganic hybrid 3d-4f heterometallic containing derivatives of sandwich type germanotungstates: [{Cu2(1,10-phen)2(μ-CH3COO)2}Ln(α-GeW11O39)2]11 − [Ln = PrIII (1a), NdIII (2a), SmIII (3a), EuIII (4a), GdIII (5a); 1,10-phen = 1.10-phenanthroline] have been prepared in the aqueous potassium acetate buffer (pH 4.7) solution. All these compounds were synthesized following by one pot reaction procedure under mild reaction conditions. All compounds were isolated as mixed alkali sodium/potassium salts from the solution and used for further structural characterization by single crystal XRD, powder-XRD, FT-IR, liquid UV/vis, solid state photoluminescence spectroscopy and thermo-gravimetric analysis. FT-IR spectra and powder-XRD pattern suggest that all compounds (1a5a) are isomorphous. Further single crystal XRD analysis shows that all these compounds exhibit sandwich-type [Ln(α-GeW11O39)2]13 − structural feature in the polyoxoanions as the fundamental building block units, and the copper complexes coordinated with 1,10-phen and acetate ligands are coordinated to the terminal oxygen of the polyanion. The compounds 1a, 3a and 4a show good photoluminescence properties at room temperature. The compound 5a shows weak ferromagnetic behavior.Alkali salts of organic-inorganic hybrid of 3d-4f heterometallic germanotungstates: [{Cu2(1,10-phen)2(μ-CH3COO)2}Ln(α-GeW11O39)2]11 − [Ln = PrIII (1a), NdIII (2a), SmIII (3a), EuIII (4a), GdIII (5a); 1,10-phen = 1.10-phenanthroline] have been prepared under mild reaction conditions. All these compounds were well characterized with SC-XRD, FT-IR spectroscopy, powder-XRD, liquid UV/vis, solid state photoluminescence spectroscopy, elemental analysis and thermo-gravimetric analysis (TGA). The magnetic measurement for the Gd-POM was also studied.Display Omitted
Keywords: Polyoxometalates; Germanotungstates; Organic-inorganic hybrid; Single crystal XRD; Magnetism; Photoluminescence;

Crystal structure and magnetic properties of di-copper and di-zinc complexes with di-2-pyridyl ketone oxime by Barry L. Westcott; Guy Crundwell; Michael Remesic; Kevin Knopf; Kiyoshi Chandler; Jonathan McMaster; E. Stephen Davies (79-81).
The heteroyclic ligand di-2-pyridyl ketone oxime (dpko) was reacted with MBr2·xH2O (M = Cu, Zn), affording several novel complexes. [Cu2(dpko)2Br4][CuBr4] and Zn(dpko)Br2 complexes are analogs of previously reported chloride complexes, and both are structurally and spectroscopically similar to the chloride analogs, [Cu2(dpko)2Cl4]Cl2 and Zn(dpko)Cl2; however, [Cu2(dpko)2Br4][CuBr4] crystallizes as the [CuBr4]2 − salt, while Zn(dpko)X2 exhibits a previously unreported disorder at the oxime site, which we now believe to also found to be present in the Zn(dpko)Cl2 analog. We also present EPR data for both [Cu2(dpko)2Br4][CuBr4] and [Cu2(dpko)2Cl4]Cl2.Display Omitted
Keywords: Di-2-pyridyl ketone oxime; Metal dimers;

Synthesis and structural characterization of two complex tantalum(V) siloxides by Sophie Ehle; Volker Lorenz; Phil Liebing; Liane Hilfert; Frank T. Edelmann (82-85).
The reaction of tantalum(V) ethoxide, Ta(OEt)5, with 1 equiv. of 1,1,3,3-tetraphenyl-disiloxane-1,3-diol, (HO)SiPh2OSi-Ph2(OH) (1), afforded the dinuclear tantalum(V) disiloxanediolate complex [{μ-(Ph2OSiO)2O}Ta(OEt)2(μ-OEt)]2 (3). Similarly, Ta(OEt)5 reacted with the incompletely condensed silsesquioxane precursor Cy7Si7O9(OH)3 (2, Cy = cyclohexyl) in a 1:1 molar ratio to afford the dinuclear tantalasilsesquioxane derivative [Cy7Si7O12Ta(OEt)(μ-OEt)]2 (4) in 80% yield. Both new complexes were structurally characterized by single-crystal X-ray diffraction studies.The facile preparation and structural characterization of two new complex tantalum(V) siloxides, [{μ-(Ph2OSiO)2O}Ta(OEt)2(μ-OEt)]2 (3) and [Cy7Si7O12Ta(OEt)(μ-OEt)]2 (4), are reported.Display Omitted
Keywords: Tantalum; Disiloxanediolate; Silsesquioxane; Metallasilsesquioxane; X-ray structure;

A rare twofold interpenetrating NbO mixed-ligand mesomeric network from two individual heterochiral 3D frameworks by Gui-Lin Wen; Dao-Fu Liu; Yong-Hong Chen; Yi-Jun Wei; Qi-Yong Zhu; Xiao-Ling Wang; Mai Xu; Ying Yao; Lu-Fang Ma (86-89).
A novel 3D NbO metal-organic framework, [Cd2(pam)2(bpt)2(H2O)]n·0.68nH2O (1) (H2pam = pamoic acid and bpt = 2,5-bis(4-pyridyl)-1,3,4-thiadiazole), has been synthesized by the structural cooperation of well-chosen flexible aromatic acid and rigid bipyridyl ligand. The rare severely distorted mixed-ligand mesomeric networks accommodate two individual heterochiral frameworks interpenetrating with each other. The bulk materials of 1 display excellent fluorescent properties.Display Omitted
Keywords: NbO topology; Mixed-ligand; Twofold interpenetrating; Heterochiral frameworks; Fluorescence;

The complex Pt(II)(PPh3)2(C6O6) was prepared by the reaction of Ag2C6O6 with cis-Pt(PPh3)2Cl2 in acetonitrile. Pt(PPh3)2(C6O6) is characterized by a lowest-energy IL (rhodizonate) excited state. The complex shows an IL fluorescence, but is also photoactive. The photolysis leads to the conversion of rhodizonate to croconate in the coordinated state: Pt(II)(PPh3)2(C6O6) → Pt(II)(PPh3)2(C5O5) + CO.Display Omitted
Keywords: Platinum(II); Rhodizonate; Photoluminescence; Photochemistry;

Syntheses, structures and magnetic properties of two Dy6 clusters based on polydentate ligands with a new topological motif by Jia-Ping Tong; Feng Shao; Ming-Guang Chen; Ya-Na Tong; Jia-Jia Zhuang; Xue-Jun Xu; Jun Tao; Lan-Sun Zheng (93-97).
Two novel analogous Dy6 complexes were synthesized in low-temperature reactions and characterized via X-ray crystallographic and magnetic measurements. Structural analysis revealed the resulting complexes form a new topological motif for hexanuclear dysprosium clusters. Magnetic studies indicated the two complexes are both ferromagnetic interactions and exhibit magnetization relaxation behavior.Two novel analogous Dy6 complexes were synthesized in low-temperature reactions and characterized via X-ray crystallographic and magnetic measurements. Structural analysis revealed the resulting complexes form a new topological motif for hexanuclear dysprosium clusters. Magnetic studies indicated the two complexes are both ferromagnetic interactions and exhibit magnetization relaxation behavior.Display Omitted
Keywords: Dysprosium(III); Clusters; Topological motif; Magnetic relaxation properties;

A two-dimensional metal-organic framework composed of paddle-wheel cobalt clusters with permanent porosity by Stephen Charles King; Hailong Wang; Hadi D. Arman; Banglin Chen (98-101).
A cobalt(II)-organic framework, [Co2(TPEC)(DMA)2]·(DMA)3 (1) (H2TPEC = 1,1,2,2-tetra(4-(4-carboxyl-phenyl)benzenyl)ethene; DMA =  N,N′’-dimethylacetamide), was synthesized and characterized by single crystal diffraction analysis. The structure shows a two-dimensional (2D) sheet composed of paddle-wheel Co2(COO)4 clusters linking TPEC ligands. The permanent porosity was established for the activated phase and gas sorption isotherms acquired.A two-dimensional cobalt(II)-organic framework has been synthesized and characterized by single crystal diffraction analysis. In addition, the permanent porosity has been established for the activated phase, and gas sorption isotherms acquired.Display Omitted

Exciting high symmetric 24-nuclear copper cluster with excellent selective adsorption capacity for cationic dyes by Hong-bin Liu; Xiao-min Tao; Hui Li; Rui Lv; Xin Liu; Wen Gu (102-105).
The carbon-carbon double bond functionalized 24-nuclear copper cluster was successfully synthesized. The cluster can capture an impressive quantity of dyes, such as RhB (rhodamineB), MB (methylene blue) and CV (crystal violet). By the interaction between double bond and ions, the complex can selective separate cationic dyes from aqueous solution effectively.An exciting high symmetric 24-nuclear copper cluster was synthesized successfully via hydrothermal reaction. By the interaction of double bond and ions, the complex can selective separate cationic dyes from aqueous solution effectively.Display Omitted
Keywords: Copper cluster; Double bond; Adsorption; Dyes; Selective separate;