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Alkyl linker effects on the coordination topology of ditopic di(2-pyridylmethyl)amine carboxylate ligands with ZnII and CuII perchlorates: polymers vs macrocycles

26-Mar-2015 | Kiattipoom Rodpun; Allan G. Blackman; Michael G. Gardiner; Eng Wui Tan; Carla J. Meledandri; Nigel T. Lucas, CrystEngComm, 2015

A series of ditopic ω-di(2-pyridylmethyl)amine carboxylic acid ligands incorporating a range of n-alkyl linkers (CnCOOH, n = 3–5, 7, 10 and 11) have been synthesised. Solution phase studies showed a 1 [ ] : [ ] 1 coordination stoichiometry between the ligands and M(ClO4)2·6H2O (M = ZnII or CuII) ...

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Evidence of Amine–CO2 Interactions in Two Pillared‐Layer MOFs Probed by X‐Ray Crystallography

20-Mar-2015 | Xiao‐Li Hu, Qi‐Han Gong, Rong‐Lin Zhong, Xin‐Long Wang, Chao Qin, Hao Wang, Jing Li, Kui‐Zhan Shao, Zhong‐Min Su, Chemistry - A European Journal, 2015

Abstract Two pillared‐layer metal–organic frameworks (MOFs; PMOF‐55 and NH2‐PMOF‐55) based on 1,2,4‐triazole and terephthalic acid (bdc)/NH2‐bdc ligands were assembled and display framework stabilities, to a certain degree, in both acid/alkaline solutions and toward water. They exhibit high ...

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A new two‐dimensional anionic cadmium(II) polymer constructed through thiocyanate coordination bridges

19-Mar-2015 | Hui‐Ting Wang, Xiao‐Li Wang, Acta Crystallographica Section C, 2015

A new cadmium–thiocyanate complex, poly[4‐(dimethylamino)pyridin‐1‐ium [di‐μ‐thiocyanato‐κ2N:S;κ2S:N‐thiocyanato‐κN‐cadmium(II)]], {(C7H11N2)[Cd(NCS)3]}n, was synthesized by the reaction of cadmium thiocyanate and 4‐(dimethylamino)pyridine hydrochloride in aqueous solution. In the crystal ...

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Aptamer-Based Sensing of β-Casomorphin-7

10-Mar-2015 | Abhishek Parashar; Yudhishthir S. Rajput; Rajan Sharma, Journal of Agricultural and Food Chemistry, 2015

β-Casomorphin-7 (BCM-7), a seven amino acid peptide, is released during digestion of β-casein A1 variant of milk which is speculated to be associated with certain diseases. Fifteen ssDNA aptamers having high affinity toward BCM-7 were identified from a 72 nt long random library after ten rounds ...

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Molecular Model of Hemoglobin N from Mycobacterium tuberculosis Bound to Lipid Bilayers: A Combined Spectroscopic and Computational Study

10-Mar-2015 | Jean-François Rhéault; Ève Gagné; Michel Guertin; Guillaume Lamoureux; Michèle Auger; Patrick Lagüe, Biochemistry, 2015

A singular aspect of the 2-on-2 hemoglobin structures of groups I and II is the presence of tunnels linking the protein surface to the distal heme pocket, supporting the storage and the diffusion of small apolar ligands to/from the buried active site. As the solubility of apolar ligands is ...

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Fast and Tunable Synthesis of ZrO2 Nanocrystals: Mechanistic Insights into Precursor Dependence

09-Mar-2015 | Katrien De Keukeleere; Jonathan De Roo; Petra Lommens; José C. Martins; Pascal Van Der Voort; Isabel Van Driessche, Inorganic Chemistry, 2015

In this work, ZrO2 nanocrystals (NCs) are synthesized via a solvothermal treatment in benzyl alcohol, which is an established method for the synthesis of many metal oxide nanocrystals. We found that the use of microwave heating allows for a reduction in reaction time from 2 days in the autoclave ...

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Hydrogen Bond, π–π, and CH–π Interactions Governing the Supramolecular Assembly of Some Hydrazone Ligands and Their MnII Complexes – Structural and Theoretical Interpretation

05-Mar-2015 | Dipali Sadhukhan, Monami Maiti, Guillaume Pilet, Antonio Bauzá, Antonio Frontera, Samiran Mitra, European Journal of Inorganic Chemistry, 2015

Abstract The hydrazone Schiff base ligands (E)‐N′‐(2‐hydroxybenzylidene)acetohydrazide (HL1) and (E)‐N′‐(2,3‐dihydroxybenzylidene)acetohydrazide (H2L2) with a functional group variation in the aromatic moiety have been synthesized. The ligands have been used to synthesize the following MnII ...

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Photoinduced Isomerization-Driven Structural Transformation Between Decanuclear and Octadecanuclear Gold(I) Sulfido Clusters

05-Mar-2015 | Liao-Yuan Yao; Vivian Wing-Wah Yam, Journal of the American Chemical Society, 2015

Upon photoirradiation, isomerization of the ligands, 1,2-bis(diphenylphosphino)ethene (dppee) from the cis to the trans form in polynuclear gold(I) sulfido clusters, led to the structural transformation of the decagold(I) cluster to the octadecagold(I) cluster. Both polynuclear μ3-sulfido gold(I) ...

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The Challenge of Deciphering Linkage Isomers in Mixtures of Oligomeric Complexes Derived from 9‐Methyladenine and trans‐(NH3)2PtII Units

03-Mar-2015 | Susana Ibáñez, Béla Mihály , Pablo J. Sanz Miguel, Dirk Steinborn, Irene Pretzer, Wolf Hiller, Bernhard Lippert, Chemistry - A European Journal, 2015

Abstract Metal coordination to N9‐substituted adenines, such as the model nucleobase 9‐methyladenine (9MeA), under neutral or weakly acidic pH conditions in water preferably occurs at N1 and/or N7. This leads, not only to mononuclear linkage isomers with N1 or N7 binding, but also to species ...

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Synthesis, structure, and properties of a dialumane supported by pyrazolate ligands

01-Mar-2015 | Christopher J. Snyder; Peter Zavalij; Kit Bowen; Hansgeorg Schnöckel; Bryan Eichhorn, Dalton Transactions, 2015

The dialumane [Al2][Na(Ph2pz)3]2 (1) has been prepared by the reaction of Na(Ph2pz) with a metastable solution of AlCl. The structure of 1 contains two hydrotris(pyrazolyl)borate-like Na(Ph2pz)32− moieties that are coordinated to each Al atom of the dialumane in a κ2,κ1-N,N,N fashion and several ...

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