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596 Aktuelle Fachpublikationen zum Thema temperature

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Stabilization of a Bimolecular Triplex by 3′‐S‐Phosphorothiolate Modifications: An NMR and UV Thermal Melting Investigation

20.03.2015 | Kathryn Evans, Inder Bhamra, Richard T. Wheelhouse, John R. P. Arnold, Richard Cosstick, Julie Fisher, Chemistry - A European Journal, 2015

Abstract Triplexes formed from oligonucleic acids are key to a number of biological processes. They have attracted attention as molecular biology tools and as a result of their relevance in novel therapeutic strategies. The recognition properties of single‐stranded nucleic acids are also ...


Synthesis of One‐Dimensional Schiff Base Polymers that Contain an Oligothiophene Building Block on the Graphite Surface

16.03.2015 | Xiu‐Ling Sun, Li‐Xia Fan, Yong‐Jing Yang, Zongxia Guo, Wei Quan Tian, Shengbin Lei, Chemistry - A European Journal, 2015

Abstract Surface‐mediated Schiff base coupling reactions between oligothiophenes equipped with an aldehyde group and aromatic diamines were investigated on highly oriented pyrolytic graphite (HOPG) by means of scanning tunneling microscopy (STM) under ambient conditions. To investigate the ...


Synthesis of Cu3Sn Alloy Nanocrystals through Sequential Reduction Induced by Gradual Increase of the Reaction Temperature

16.03.2015 | Sanghun Cho, Dong‐Hun Shin, Zhenxing Yin, Chaedong Lee, Si Yun Park, Jeeyoung Yoo, Yuanzhe Piao, Youn Sang Kim, Chemistry - A European Journal, 2015

Abstract Cu3Sn alloy nanocrystals are synthesized by sequential reduction of Cu and Sn precursors through a gradual increase of the reaction temperature. By transmission electron microscopy (TEM), energy‐dispersive X‐ray spectroscopy (EDS), UV/Vis spectroscopy, and X‐ray diffraction (XRD) ...


Amending the Anisotropy Barrier and Luminescence Behavior of Heterometallic Trinuclear Linear [MIILnIIIMII] (LnIII=Gd, Tb, Dy; MII=Mg/Zn) Complexes by Change from Divalent Paramagnetic to Diamagnetic Metal Ions

13.03.2015 | Sourav Das, K. S. Bejoymohandas, Atanu Dey, Sourav Biswas, M. L. P. Reddy, Roser Morales, Eliseo Ruiz, Silvia Titos‐ ..., Chemistry - A European Journal, 2015

Abstract The sequential reaction of a multisite coordinating compartmental ligand [2‐(2‐hydroxy‐3‐(hydroxymethyl)‐5‐methylbenzylideneamino)‐2‐methylpropane‐1,3‐diol] (LH4) with appropriate lanthanide salts followed by the addition of [Mg(NO3)2]⋅6 H2O or [Zn(NO3)2]⋅6 H2O in a 4:1:2 ...


Push–Pull Buta‐1,2,3‐trienes: Exceptionally Low Rotational Barriers of Cumulenic CC Bonds and Proacetylenic Reactivity

12.03.2015 | Przemyslaw Gawel, Yi‐Lin Wu, Aaron D. Finke, Nils Trapp, Michal Zalibera, Corinne Boudon, Jean‐Paul Gisselbrecht, W. ..., Chemistry - A European Journal, 2015

Abstract A variety of asymmetrically donor–acceptor‐substituted [3]cumulenes (buta‐1,2,3‐trienes) were synthesized by developed procedures. The activation barriers to rotation ΔG≠ were measured by variable temperature NMR spectroscopy and found to be as low as 11.8 kcal mol−1, in the range of ...


Hydrogen‐Bond Mediated Aglycone Delivery (HAD): A Highly Stereoselective Synthesis of 1,2‐cis α‐D‐Glucosides from Common Glycosyl Donors in the Presence of Bromine

12.03.2015 | Jagodige P. Yasomanee, Alexei V. Demchenko, Chemistry - A European Journal, 2015

Abstract Described herein is the expansion of the picoloyl protecting‐group assisted H‐bond mediated aglycone delivery (HAD) method recently introduced by our laboratory. At first it was noticed that high α‐stereoselectivity is only obtained with S‐ethyl glycosyl donors and only in the ...


Hydroamination Reactions of Alkynes with ortho‐Substituted Anilines in Ball Mills: Synthesis of Benzannulated N‐Heterocycles by a Cascade Reaction

12.03.2015 | Maik Weiße, Markus Zille, Katharina Jacob, Robert Schmidt, Achim Stolle, Chemistry - A European Journal, 2015

Abstract It was demonstrated that ortho‐substituted anilines are prone to undergo hydroamination reactions with diethyl acetylenedicarboxylate in a planetary ball mill. A sequential coupling of the intermolecular hydroamination reaction with intramolecular ring closure was utilized for the ...


Frontispiece: Solvent‐free Liquid Crystals and Liquids from DNA

12.03.2015 | Kai Liu, Min Shuai, Dong Chen, Michael Tuchband, Jennifer Y. Gerasimov, Juanjuan Su, Qing Liu, Wojciech Zajaczkowski ..., Chemistry - A European Journal, 2015

Solvent‐free DNA Fluid Systems In the Communication on page 4898 ff., A. Herrmann, N. A. Clark et al. present a simple strategy for producing solvent‐free DNA liquid crystals and liquids by electrostatic complexation of DNA with cationic surfactants. Stable smectic and modulated smectic liquid ...


Intermolecular Asymmetric Carboesterification of Alkenes by Using Chiral Amine Auxiliaries under O2: Synthesis of Enantioenriched α‐Methylene‐γ‐Lactones through Chloropalladation of Alkynes

11.03.2015 | Zhenming Zhang, Wanqing Wu, Jianhua Liao, Jianxiao Li, Huanfeng Jiang, Chemistry - A European Journal, 2015

Abstract Herein, the first example of chloropalladation‐initiated asymmetric intermolecular carboesterification of alkenes with alkynes by using chiral amine auxiliaries is reported. The use of (1S,2S)‐N1,N1‐dimethylcyclohexane‐1,2‐diamine auxiliaries is essential for providing ...


Homo‐ and Heteronuclear Compounds with a Symmetrical Bis‐hydrazone Ligand: Synthesis, Structural Studies, and Luminescent Properties

11.03.2015 | Sabina Rodríguez‐Hermida, Ana B. Lago, Rosa Carballo, Oscar Fabelo, Ezequiel M. Vázquez‐López, Chemistry - A European Journal, 2015

Abstract Nine new coordination compounds have been synthesized by the reaction of salts of bivalent metal ions (a=ZnII, b=CuII, c=NiII, d=CoII) with the bis(benzoylhydrazone) derivative of 4,6‐diacetylresorcinol (H4L). Three kinds of complexes have been obtained: homodinuclear compounds ...


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