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443 Aktuelle Fachpublikationen zum Thema temperature

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Proton‐Conducting Supramolecular Metallogels from the Lowest Molecular Weight Assembler Ligand: A Quote for Simplicity

07.06.2013 | Subhadeep Saha, Eva‐Maria Schön, Carlos Cativiela, David Díaz Díaz, Rahul Banerjee, Chemistry - A European Journal, 2013

Abstract Oxalic acid has been proven to be the lowest molecular weight organic ligand able to form robust supramolecular metallogel networks in the presence of metal salts. In particular, two novel multifunctional metallogels were readily prepared at room temperature by simple mixing of ...

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Class III Delocalization and Exciton Coupling in a Bimetallic Bis‐ligand Radical Complex

07.06.2013 | Tim J. Dunn, Linus Chiang, Caterina F. Ramogida, Khatera Hazin, Michael I. Webb, Michael J. Katz, Tim Storr, Chemistry - A European Journal, 2013

Abstract The geometric and electronic structure of an oxidized bimetallic Ni complex incorporating two redox‐active Schiff‐base ligands connected via a 1,2‐phenylene linker has been investigated and compared to a monomeric analogue. Information from UV/Vis/NIR spectroscopy, electron ...

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Facile and Rapid Oxidation Fabrication of BiOCl Hierarchical Nanostructures with Enhanced Photocatalytic Properties

04.06.2013 | Jinyan Xiong, Zhengbo Jiao, Gongxuan Lu, Wei Ren, Jinhua Ye, Yingpu Bi, Chemistry - A European Journal, 2013

Coming up flowers: Three‐dimensional (3D) flower‐like BiOCl hierarchical nanostructures (HNs) were fabricated by a facile and rapid in situ oxidation reaction between metallic Bi nanospheres and FeCl3 at room temperature (see scheme). These structures exhibit excellent photocatalytic ...

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Structure‐Dependent Electronic Nature of Star‐Shaped Oligothiophenes, Probed by Ensemble and Single‐Molecule Spectroscopy

04.06.2013 | Heejae Chung, Tomoyuki Narita, Jaesung Yang, Pyosang Kim, Masayoshi Takase, Masahiko Iyoda, Dongho Kim, Chemistry - A European Journal, 2013

Abstract We have investigated the photophysical properties of star‐shaped oligothiophenes with three terthiophene arms (meta to each other, S3) or six terthiophene arms (ortho‐, meta‐, and para‐arranged, S6) connected to an ethynylbenzene core to elucidate the relationship between their ...

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Enantiocontrolled Total Synthesis of (−)‐Mersicarpine

31.05.2013 | Yusuke Iwama, Kentaro Okano, Kenji Sugimoto, Hidetoshi Tokuyama, Chemistry - A European Journal, 2013

Abstract A racemic synthesis of mersicarpine (1) was achieved by the Mizoroki–Heck reaction and a DIBALH‐mediated reductive ring‐expansion reaction. Based on a first‐generation synthesis, a second‐generation enantiocontrolled total synthesis of (−)‐mersicarpine (1) was achieved by an ...

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Enthalpy–Entropy Compensation Combined with Cohesive Free‐Energy Densities for Tuning the Melting Temperatures of Cyanobiphenyl Derivatives

21.05.2013 | Thibault Dutronc, Emmanuel Terazzi, Laure Guénée, Kerry‐Lee Buchwalder, Aurore Spoerri, Daniel Emery, Jiri Mareda, S ..., Chemistry - A European Journal, 2013

Abstract This work illustrates how minor structural perturbations produced by methylation of 4′‐(dodecyloxy)‐4‐cyanobiphenyl leads to enthalpy–entropy compensation for their melting processes, a trend which can be analyzed within the frame of a simple intermolecular cohesive model. The ...

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Highly Active, Thermally Stable, Ethylene‐Polymerisation Pre‐Catalysts Based on Niobium/TantalumImine Systems

16.05.2013 | Carl Redshaw, Mark Walton, Lucy Clowes, David L. Hughes, Anna‐Marie Fuller, Yimin Chao, Alex Walton, Victor Sumerin, ..., Chemistry - A European Journal, 2013

Abstract The reactions of MCl5 or MOCl3 with imidazole‐based pro‐ligand L1H, 3,5‐tBu2‐2‐OH‐C6H2‐(4,5‐Ph2‐1H‐)imidazole, or oxazole‐based ligand L2H, 3,5‐tBu2‐2‐OH‐C6H2(1H‐phenanthro[9,10‐d])oxazole, following work‐up, afforded octahedral complexes [MX(L1, 2)], where MX=NbCl4 (L1, 1 a; L2, ...

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Chelation‐Assisted Cross‐Coupling of Anilines through In‐Situ Activation as Diazonium Salts with Boronic Acids under Ligand‐, Base‐, and Salt‐Free Conditions

16.05.2013 | Roxan Joncour, Nicolas Susperregui, Noël Pinaud, Karinne Miqueu, Eric Fouquet, Jean‐Marc Sotiropoulos, François‐Xavi ..., Chemistry - A European Journal, 2013

Abstract We describe the coupling of anilines with aryl boronic acids, under ligand‐, base‐, and salt‐free conditions at room temperature. This new reaction proceeds through the formation of an aryl palladium alkoxo complex, which allows the transmetalation step with aryl boronic acids ...

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Shape‐Persistent (Pt‐salphen)2 Phosphorescent Coordination Frameworks: Structural Insights and Selective Perturbations

16.05.2013 | Zhengqing Guo, Shek‐Man Yiu, Michael C. W. Chan, Chemistry - A European Journal, 2013

Abstract The development of molecular frameworks derived from binuclear platinum(II) aromatic Schiff base (salphen) complexes and their supramolecular chemistry have been undertaken. A series of axially rotating (Pt‐salphen)2 luminophores, tethered in a cofacial manner by a rigid linker ...

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Changes in the Structural Dimensionality of Selenidostannates in Ionic Liquids: Formation, Structures, Stability, and Photoconductivity

15.05.2013 | Yumei Lin, Dewang Xie, Werner Massa, Leonhard Mayrhofer, Sina Lippert, Benjamin Ewers, Alexey Chernikov, Martin Koch ..., Chemistry - A European Journal, 2013

Abstract In situ transformations of selenidostannate frameworks in ionic liquids (ILs) were initiated by treatment of the starting phase K2[Sn2Se5] and the consecutive reaction products by means of temperature increase and/or amine addition. Along the reaction pathway, the framework ...

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