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542 Aktuelle Fachpublikationen zum Thema temperature

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Solution Polymeric Optical Temperature Sensors with Long‐Term Memory Function Powered by Supramolecular Chemistry

20.11.2014 | Victor R. de la Rosa, Richard Hoogenboom, Chemistry - A European Journal, 2014

Abstract A poly[(2‐ethyl‐2‐oxazoline)‐ran‐(2‐nonyl‐2‐oxazoline)] copolymer in combination with hydroxypropylated cyclodextrins has been demonstrated to lead to a supramolecular self‐assembly process that results in the formation of kinetically trapped thermoresponsive nanoparticles. Selection ...


Fluorescence Enhancement of Covalently Linked 1‐Cyano‐1,2‐Diphenylethene Chromophores with Naphthalene‐1,8‐diyl Linker Units: Analysis Based on Kinetic Constants

20.11.2014 | Takashi Hirose, Yohei Tsunoi, Yuya Fujimori, Kenji Matsuda, Chemistry - A European Journal, 2014

Abstract The fluorescence enhancement effect of covalently fixed fluorescent chromophores has been investigated by means of kinetic analysis of decay rate constants and theoretical calculations. Derivatives of 1‐cyano‐1,2‐diphenylethene dimer have a distorted cyclic structure when both ends ...


A Route to Stereochemically Pure Benzyllithium Reagents by Stereocontrolled Epimerisation

18.11.2014 | Stephan G. Koller, Ulrike Kroesen, Carsten Strohmann, Chemistry - A European Journal, 2014

Abstract Alkyllithium compounds are not generally stable at room temperature, therefore strategies were established to overcome this limitation. We present a systematic approach to obtain a stereochemically enriched benzyllithium compound, starting with the simple addition of a chiral ...


Room‐Temperature Synthesis of Cu2−xE (E=S, Se) Nanotubes with Hierarchical Architecture as High‐Performance Counter Electrodes of Quantum‐Dot‐Sensitized Solar Cells

14.11.2014 | Xin Qi Chen, Zhen Li, Yang Bai, Qiao Sun, Lian Zhou Wang, Shi Xue Dou, Chemistry - A European Journal, 2014

Abstract Copper chalcogenide nanostructures (e.g. one‐ dimensional nanotubes) have been the focus of interest because of their unique properties and great potential in various applications. Their current fabrications mainly rely on high‐temperature or complicated processes. Here, with the ...


Nanopatterned Superlattices in Self‐Assembled C2‐Symmetric Oligodimethylsiloxane‐Based Benzene‐1,3,5‐Tricarboxamides

14.11.2014 | Miguel García‐Iglesias, Bas F. M. de Waal, Isja de Feijter, Anja R. A. Palmans, E. W. Meijer, Chemistry - A European Journal, 2014

Abstract The synthesis of C3‐ and C2‐symmetric benzene‐1,3,5‐tricarboxamides (BTAs) containing well‐defined oligodimethylsiloxane (oDMS) and/or alkyl side chains has been carried out. The influence of the bulkiness of the oDMS chains in the aggregation behavior of dilute solutions of the ...


A Regioselective Synthesis of Benzopinacolones through Aerobic Dehydrogenative α‐Arylation of the Tertiary sp3 CH Bond of 1,1‐Diphenylketones with Aromatic and Heteroaromatic Compounds

13.11.2014 | Nagnath Yadav More, Masilamani Jeganmohan, Chemistry - A European Journal, 2014

Abstract A regioselective synthesis of symmetrical and unsymmetrical benzopinacolones through aerobic dehydrogenative α‐arylation at the tertiary sp3 CH bond of substituted 1,1‐diphenylketones with aromatic and heteroaromatic compounds, in the presence of K2S2O8 in CF3COOH at room ...


Multiple‐Stimulus‐Responsive Supramolecular Gels of Two Components and Dual Chiroptical Switches

13.11.2014 | Wangen Miao, Long Qin, Dong Yang, Xue Jin, Minghua Liu, Chemistry - A European Journal, 2014

Abstract A new class of L‐glutamic gelators, LG12(CH2)nCOOH, containing different lengths of methylene spacer were synthesized. It was found that the gelation ability of these compounds themselves was very weak. However, when another compound, p‐xylylenediamine (XEA), was introduced, the ...


An Integrated Imaging Probe Design: The Synthesis of 99mTc/Re‐Containing Macrocyclic Peptide Scaffolds

11.11.2014 | Jennifer L. Hickey, Emily J. Simpson, Jinqiang Hou, Leonard G. Luyt, Chemistry - A European Journal, 2014

Abstract β‐Sheets account for over 30 % of all secondary structural conformations found in proteins. The intramolecular hydrogen bonding that exists between the two peptide strands is imperative in maintaining this secondary structure. With the proper design, cyclic peptides may act as ...


Stereo‐ and Regioselective Phyllobilane Oxidation in Leaf Homogenates of the Peace Lily (Spathiphyllum wallisii): Hypothetical Endogenous Path to Yellow Chlorophyll Catabolites

07.11.2014 | Clemens Vergeiner, Markus Ulrich, Chengjie Li, Xiujun Liu, Thomas Müller, Bernhard Kräutler, Chemistry - A European Journal, 2014

Abstract In senescent leaves, chlorophyll typically is broken down to colorless and essentially photo‐inactive phyllobilanes, which are linear tetrapyrroles classified as “nonfluorescent” chlorophyll catabolites (NCCs) and dioxobilane‐type NCCs (DNCCs). In homogenates of senescent leaves of ...


Aggregation‐Induced Emission Rotors: Rational Design and Tunable Stimuli Response

07.11.2014 | Jie Li, Yang Zhang, Ju Mei, Jacky W. Y. Lam, Jianhua Hao, Ben Zhong Tang, Chemistry - A European Journal, 2014

Abstract A novel molecular design strategy is provided to rationally tune the stimuli response of luminescent materials with aggregation‐induced emission (AIE) characteristics. A series of new AIE‐active molecules (AIE rotors) are prepared by covalently linking different numbers of ...


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