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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/28740978/synthesis-and-photo-electro-catalytic-properties-of-a-3d-pomof-material-based-on-an-interpenetrated-copper-coordination-polymer-linked-by-in-situ-dual-ligands-and-dawson-type-phosphotungstates
#1
Ling-Yu Fan, Kai Yu, Jing-Hua Lv, He Zhang, Zhan-Hua Su, Lu Wang, Chun-Mei Wang, Bai-Bin Zhou
A novel 3D polyoxometalate metal organic framework (POMOF), [{CuCu (H2O)5(pzc)10(pz)6}{P2W18O62}2]·4H2O (1) (Hpzc = pyrazine-2-carboxylic acid, pz = pyrazine) has been hydrothermally synthesized and characterized by IR, TG, XRD, UV-vis and elemental analyses. In compound 1, the pzc and pz ligands are generated through in situ transformation from pyrazine-2,3-dicarboxylic acid (pzdc) to remove one or two CO2 molecules. The ligands with four coordination modes connect nine crystallographically independent Cu atoms to form a super-big circle unit...
July 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737821/structure-and-reactivity-of-ru-ii-terpy-n-n-cl-cl-complexes-consequences-for-biological-applications
#2
Marta Chrzanowska, Anna Katafias, Olga Impert, Anna Kozakiewicz, Andrzej Surdykowski, Paulina Brzozowska, Alicja Franke, Achim Zahl, Ralph Puchta, Rudi van Eldik
The crystal structures of [Ru(II)(terpy)(bipy)Cl]Cl·2H2O and [Ru(II)(terpy)(en)Cl]Cl·3H2O, where terpy = 2,2':6',2''-terpyridine, bipy = 2,2'-bipyridine and en = ethylenediamine, were determined and compared to the structure of the complexes in solution obtained by multi-nuclear NMR spectroscopy in DMSOd-6 as a solvent. In aqueous solution, both chlorido complexes aquate fully to the corresponding aqua complexes, viz. [Ru(II)(terpy)(bipy)(H2O)](2+) and [Ru(II)(terpy)(en)(H2O)](2+), within ca. 2 h and ca. 2 min at 37 °C, respectively...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737819/insertion-reactions-of-small-unsaturated-molecules-in-the-n-b-bonds-of-boron-guanidinates
#3
Alberto Ramos, Antonio Antiñolo, Fernando Carrillo-Hermosilla, Rafael Fernández-Galán, María Del Pilar Montero-Rama, Elena Villaseñor, Antonio Rodríguez-Diéguez, Daniel García-Vivó
We report here 1,1- and 1,2-insertion reactions of small unsaturated molecules in the N-B bonds of two boron guanidinates, (Me2N)C(N(i)Pr)2BCy2 (1) and {(i)Pr(H)N}C(N(i)Pr){N(p-(t)Bu-C6H4)}BCy2 (2), and two bisboron guanidinates(2-), {(i)Pr(BCy2)N}C(N(i)Pr){N(p-(t)Bu-C6H4)}BCy2 (3) and {(i)Pr(C8H14B)N}C(N(i)Pr){N(p-Me-C6H4)}BC8H14 (4), the latter being prepared for the first time by double deprotonation of the corresponding guanidine with the 9-borabicyclo[3.3.1]nonane dimer, (H-BC8H14)2. Compounds 1-4 easily insert aromatic isonitriles, XylNC (Xyl = 2,6-Me2-C6H3) and (p-MeO-C6H4)NC, to give the expected diazaboroles 5-12, some of them being structurally characterised by X-ray diffraction...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737818/di-vs-tetra-substituted-quinonediimines-a-drastic-effect-on-coordination-chemistry
#4
Lucien Lavaud, Zhongrui Chen, Mourad Elhabiri, Denis Jacquemin, Gabriel Canard, Olivier Siri
We describe the first isolation of N,N'-disubstituted benzoquinonediimines (QDIs) 2 which revealed drastically different properties compared to N,N',N'',N'''-tetrasubstituted QDIs 1 due to the absence of N-substituents in the "upper part" of the molecule. Three major differences could be highlighted thanks to the present joint experimental and theoretical investigation: (1) the metalation with different metal precursors revealed a specific behaviour in coordination chemistry giving access to novel complexes with unprecedented stoichiometry and remarkable absorption properties...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737814/synthesis-and-characterization-of-1-diphenylphosphino-1-isocyanoferrocene-an-organometallic-ligand-combining-two-different-soft-donor-moieties-and-its-group-11-metal-complexes
#5
Karel Škoch, Ivana Císařová, Jiří Schulz, Ulrich Siemeling, Petr Štěpnička
The development of a practical synthesis of 1'-(diphenylphosphino)-1-aminoferrocene (2) and its P-borane adduct (2B) allowed the facile preparation of 1'-(diphenylphosphino)-1-isocyanoferrocene (1). This compound combining two specific soft-donor moieties was studied as a ligand for univalent Group 11 metal ions. The reactions of 1 with AgCl at 1 : 1 and 2 : 1 molar ratios only led to the coordination polymer [Ag2(μ-Cl)2(μ(P,C)-1)]n (6), while those with Ag[SbF6] provided the dimer [Ag2(Me2CO-κO)2(μ(P,C)-1)2][SbF6]2 and the quadruply-bridged disilver complex [Ag2(μ(P,C)-1)4][SbF6]2 (8), respectively...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737813/the-synthesis-of-cuymnzal1-zox-mixed-oxide-as-a-low-temperature-nh3-scr-catalyst-with-enhanced-catalytic-performance
#6
Qinghua Yan, Sining Chen, Lei Qiu, Yanshan Gao, Dermot O'Hare, Qiang Wang
A new type of low-temperature selective catalytic reduction (SCR) catalyst, CuyMnzAl1-zOx, derived from layered double hydroxides is presented in this contribution. By tuning the Cu/Mn/Al ratio, the optimal catalyst Cu2Mn0.5Al0.5Ox resulted in a NOx conversion of 91.2% at 150 °C, which is much higher than that of all other control catalysts, Cu2AlOx (71.1%), Cu-Mn/γ-Al2O3 (65.23%), and Mn/γ-Al2O3 (59.32%). All samples were characterized in detail using various physico-chemical techniques including XRD, BET, FTIR, TEM, H2-TPR, NH3-TPD, and XPS analyses, and the results revealed that the superior catalytic performance of the Cu2Mn0...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737807/npy-binds-with-heme-to-form-a-npy-heme-complex-enhancing-peroxidase-activity-in-free-heme-and-promoting-npy-nitration-and-inactivation
#7
Huixian Ye, Zhen Yang, Hailing Li, Zhonghong Gao
Neuropeptide Y (NPY) is a member of the pancreatic peptide family of neuropeptides that play a crucial role in numerous central and peripheral nervous system responses. Recently, it has been shown that NPY protects cells against neurotoxic damage from β-amyloid peptides (Aβ) in Alzheimer's disease (AD). Heme is a common factor linking several metabolic perturbations in AD and altered heme metabolism has been shown to be related to the pathologies of AD. Thus, heme may have a chance to act on NPY and potentially counteract its function...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737801/optical-properties-and-mechanofluorochromism-of-new-bodipy-dyes-based-on-the-pyridine-pyrimidine-hybrid-structure
#8
Yi Liu, Jicheng Duan, Fen Qi, Dan Tian, Xiaoqing Wang, Zhipeng Liu, Wei Huang
A new family of BODIPY dyes (PPB1-4) based on the pyridine-pyrimidine hybrid structure has been synthesized. These dyes show high cyan fluorescence in hexane with quantum yields (Φf) ranging from 0.33 to 0.90. Interestingly, moderate fluorescence of PPB1-4 is observed in the solid state (Φf, 0.11-0.26). X-ray structure analysis demonstrates that H-aggregation should be responsible for the red-shifted and quenched emission in the solid state. Moreover, PPB1-4 show high contrast and reversible mechanochromic fluorescence based on the proposed mechanism of mechanical stimuli triggered dimer dissolution and formation...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737800/c-h-addition-reactivity-of-2-phenylpyridine-and-2-2-bipyridine-with-pentaphenylborole
#9
Venkata A K Adiraju, Caleb D Martin
The reactions of pentaphenylborole with pyridines with a pendent aryl group in the 2-position, specifically 2-phenylpyridine and 2,2'-bipyridine, readily afforded adducts. Upon thermolysis, the adducts converted to ortho C-H addition products with the two substituents introduced onto the diene on the boracyclic carbon atoms adjacent to boron in a syn fashion. Photolysis of the syn 2-phenypyridine product led to isomerization to the anti conformer which did not readily occur for the 2,2'-bipyridine complex. Such C-H bond reactivity is uncommon for main group elements and provides insight into methodologies to access boron frameworks...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737797/cation-distribution-dependent-magnetic-properties-in-cocr2-xfexo4-x-0-1-to-0-5-exafs-m%C3%A3-ssbauer-and-magnetic-measurements
#10
D Kumar, A Banerjee, A Mahmoud, Chandana Rath
In this report, we have examined the evolution of the structure and rich magnetic transitions such as a paramagnetic to ferrimagnetic phase transition at the Curie temperature (TC), spiral ordering temperature (TS) and lock-in temperature (TL) observed in the CoCr2O4 spinel multiferroic after substituting Fe. The crystal structure, microstructure and cation distribution among the tetrahedral (A) and octahedral (B) sites in the spinel lattice are characterised by X-ray diffraction, transmission electron microscopy, Extended X-ray Absorption Fine Structure (EXAFS) and Mössbauer spectroscopy...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737787/coming-full-circle-constructing-a-gd6-wheel-dimer-by-dimer-and-the-importance-of-spin-topology
#11
Thomas N Hooper, Stuart K Langley, Silvia Gómez-Coca, Giulia Lorusso, Eliseo Ruiz, Keith S Murray, Marco Evangelisti, Euan K Brechin
The syntheses, structures, magnetic and thermodynamic properties of three related triethanolamine-based Gd(III) complexes are described. The smallest, a dimer ([Gd2]), can be viewed as the subunit from which the two larger complexes, a linear tetramer ([Gd2]2) and a cyclic hexamer ([Gd2]3), are composed by further deprotonation of the triethanolamine ligand. In all cases, nearest neighbour magnetic ions are weakly correlated by antiferromagnetic isotropic exchange, whose strength does not change significantly from one complex to another; J ranging from -0...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737785/how-to-obtain-pt-iv-complexes-suitable-for-conjugation-to-nanovectors-from-the-oxidation-of-ptcl-terpyridine
#12
E Gabano, E Perin, C Fielden, J A Platts, A Gallina, B Rangone, M Ravera
Oxidation of [Pt((II))Cl(terpy)](+) (terpy = 2,2':6',2''-terpyridine) has been attempted with several oxidizing agents and under different experimental conditions in order to obtain a Pt(iv) complex suitable for the conjugation to nanovectors to be used in drug delivery targeting for anticancer therapy. The best compromise in terms of yield and purity of the final complex was obtained by microwave-assisted reaction at 70 °C in 50% aqueous H2O2 for 2 h. Under these conditions the quantitative formation of [Pt((IV))Cl(OH)2(terpy)](+) was observed...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731122/ligand-effect-on-the-rhodium-porphyrin-catalyzed-hydrogenation-of-2-2-paracyclophane-with-water-key-bimetallic-hydrogenation
#13
Chun Meng Tam, Ching Tat To, Kin Shing Chan
Rhodium porphyrin catalyzed hydrogenation of the aliphatic carbon-carbon σ-bond of [2.2]paracyclophane with water has been examined with a variety of tetraarylporphyrins and axial ligands. Mechanistic investigations show that Rh(III)(ttp)H, which can be derived from the reaction of [Rh(II)(ttp)]2 with water without a sacrificial reductant, plays an important role in promoting bimetallic reductive elimination to give the hydrogenation product.
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731114/ru-ii-pta-and-mpta-complexes-with-n2-donor-ligands-bipyridyl-and-phenanthroline-and-their-antiproliferative-activities-on-human-multiple-myeloma-cell-lines
#14
Aleksandra Wołoszyn, Claudio Pettinari, Riccardo Pettinari, Gretta Veronica Badillo Patzmay, Anna Kwiecień, Giulio Lupidi, Massimo Nabissi, Giorgio Santoni, Piotr Smoleński
A series of novel ruthenium(ii) 2,2'-bipyridyl (bpy) and 1,10-phenanthroline (phen) derivatives containing PTA (1,3,5-triaza-7-phosphaadamantane) or mPTA (N-methyl-1,3,5-triaza-7-phosphaadamantane cation) have been synthesized and fully characterized. Three types of complexes have been obtained, neutral [Ru(N-N)(PTA)2Cl2] (1, N-N = bpy and 4, N-N = phen), monocationic [Ru(N-N)(PTA)3Cl][Cl] (2, N-N = bpy and 5, N-N = phen) and dicationic [Ru(N-N)(mPTA)Cl2][BF4]2 (3, N-N = bpy and 6, N-N = phen). The solid-state structures of four complexes have been determined by single-crystal X-ray diffraction...
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731108/manganese-mediated-synthesis-of-an-nhc-core-non-symmetric-pincer-ligand-and-evaluation-of-its-coordination-properties
#15
Dmitry A Valyaev, Jérémy Willot, Loïc P Mangin, Davit Zargarian, Noël Lugan
The alkylation of N-(2-pyridyl)imidazole by the Mn(I) methylene-phosphonium complex [Cp(CO)2Mn(η(2)-P,C-Ph2P[double bond, length as m-dash]C(H)Ph)]BF4 offers a straightforward route to a tridentate pro-ligand featuring an NHC core and phosphine/pyridine arms. The ability of this PĈN ligand to coordinate in a pincer mode was recognized in Rh(I), Rh(III), and Ni(II) complexes.
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731099/novel-phosphorescent-cationic-iridium-iii-complexes-with-o-carboranylation-on-the-ancillary-n-n-ligand
#16
Xiang Li, Yongheng Yin, Hong Yan, Changsheng Lu, Qiang Zhao
A novel series of heteroleptic iridium complexes with 2-phenyl-pyridine as a main ligand and carborane-functionalized 2,2'-bipyridine as an ancillary ligand were synthesized, and characterized as [Ir(ppy)2(By)]PF6 (where ppy is 2-phenyl-pyridine, By is 5-(2-R-Cb)-2,2'-bipyridine, R = H (2a), CH3 (2b), Ph (2c), iPr (2d) and iBu (2e), or By is 4-(2-R-Cb)-2,2'-bipyridine while R = H (3a), CH3 (3b), Ph (3c), iPr (3d) and iBu (3e), Cb = o-carboran-1-yl). The R groups and the substitution sites of carborane on the pyridine ring have caused differences in the emission properties of these complexes...
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731092/a-ni-p-nico-ldh-core-shell-nanorod-decorated-nickel-foam-with-enhanced-areal-specific-capacitance-for-high-performance-supercapacitors
#17
Jiale Xing, Jing Du, Xuan Zhang, Yubo Shao, Ting Zhang, Cailing Xu
Recently, transition metal-based nanomaterials have played a key role in the applications of supercapacitors. In this study, nickel phosphide (Ni-P) was simply combined with NiCo LDH via facile phosphorization of Ni foam and subsequent electrodeposition to form core-shell nanorod arrays on the Ni foam; the Ni-P@NiCo LDH was then directly used for a pseudocapacitive electrode. Owing to the splendid synergistic effect between Ni-P and NiCo LDH nanosheets as well as the hierarchical structure of 1D nanorods, 2D nanosheets, and 3D Ni foam, the hybrid electrode exhibited significantly enhanced electrochemical performances...
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731090/octahedral-yb-iii-complexes-embedded-in-co-iii-cn-6-bridged-coordination-chains-combining-sensitized-near-infrared-fluorescence-with-slow-magnetic-relaxation
#18
Szymon Chorazy, Michał Rams, Junhao Wang, Barbara Sieklucka, Shin-Ichi Ohkoshi
Ytterbium (3+) ions combined with 3-pyridone and hexacyanido-cobaltate(iii) anions in a concentrated aqueous solution produce cyanido-bridged {[Yb(III)(3-pyridone)2(H2O)2][Co(III)(CN)6]} (1) chains. The resulting Yb(III) complexes of an elongated octahedral geometry reveal two coexisting functionalities: a field-induced slow magnetic relaxation with an energy barrier of ΔE/kB = 45(1) K at Hdc = 1 kOe, and an Yb(III)-centered near-infrared fluorescence in the 950-1100 nm range sensitized by 3-pyridone and [Co(III)(CN)6](3-)...
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731087/chiral-two-bladed-ml2-metallamacrocycles-design-structures-and-solution-behavior
#19
Hannah Soudry, Christophe Desmarets, Geoffrey Gontard, Tiffany Edgington, Andrew L Cooksy, Hani Amouri
Chiral two bladed complexes of [Co(L)2][BF4]2 (1) and [Zn(L)2][BF4]2 (2) containing an atropoisomeric semi-rigid bidentate ligand L were synthesized and characterized. They are obtained as homochiral species but in a racemic mixture via a ligand self-sorting mechanism. These enantiomers can be differentiated in solution using optically active anions.
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28731081/metal-mediated-reactions-between-dialkylcyanamides-and-acetamidoxime-generate-unusual-nitrosoguanidinate-nickel-ii-complexes
#20
Zarina M Bikbaeva, Alexander S Novikov, Vitalii V Suslonov, Nadezhda A Bokach, Vadim Yu Kukushkin
The nitrosoguanidinate complexes [Ni{NH[double bond, length as m-dash]C(NR2)NN(O)}2] (R2 = Me21, (CH2)4O 2, (CH2)43, (CH2)54, (Me)Ph 5, Ph26, (p-MeC6H4)27) were obtained in low-to-moderate (12-26%) yields but reproducible yields in an unexpected metal-mediated reaction in MeOH between the nickel salt NiCl2·2H2O, N,N-disubstituted cyanamides NCNR2, and the amidoxime MeC([double bond, length as m-dash]NOH)NH2. These complexes were formed along with a spectrum of cyanamide-oxime coupling products. The IR and X-ray data indicate the delocalization within the NNO and NCN systems of the nitrosoguanidinate ligand...
July 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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