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58.469 Aktuelle Fachpublikationen zum Thema temperature

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Supramolecular hydrogels derived from cyclic amino acids and their applications in the synthesis of Pt and Ir nanocrystals

21.10.2014 | Chuanqing Kang; Lanlan Wang; Zheng Bian; Haiquan Guo; Xiaoye Ma; Xuepeng Qiu; Lianxun Gao, Chemical Communication, 2014

New simple hydrogelators containing the structural features of cyclic amino acids were investigated for water gelation through H-bonds from carboxylic acids and amino groups, showing for the first time the use of a single amino acid as a hydrogelator. The hydrogels were used for the synthesis of ...

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Practical synthesis of pyrazoles via a copper-catalyzed relay oxidation strategy

21.10.2014 | Xiaodong Tang; Liangbin Huang; Jidan Yang; Yanli Xu; Wanqing Wu; Huanfeng Jiang, Chemical Communication, 2014

Various 1,3- and 1,3,4-substituted pyrazoles are smoothly formed via copper-catalyzed cascade reactions of oxime acetates, amines and aldehydes. This relay oxidative process involves copper-promoted N–O bond cleavage and C–C/C–N/N–N bond formations to furnish pyrazolines, and sequential Cu–O2 ...

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Hydrogen bonded-extended lanthanide coordination polymers decorated with 2,3-thiophenedicarboxylate and oxalate: synthesis, structures, and properties

21.10.2014 | zhaohao li; Li-Ping Xue; Li-Li Shang; bangtun zhao; jian kan; Weiping Su, CrystEngComm, 2014

Five new lanthanide coordination polymers, {[Ln2(tdc)2(C2O4)(H2O)4]•(H2O)}n (Ln = Nd (1), Eu (2), Gd (3), Tb (4), Ho (5); H2tdc = 2,3-thiophenedicarboxylic acid), have been synthesized by hydrothermal reactions of H2tdc, sodium oxalate and corresponding lanthanide nitrate. Crystallographic data ...

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Phosphine Complexes of Lone Pair Bearing Lewis Acceptors

21.10.2014 | Saurabh Chitnis; Neil Burford, Dalton Transactions, 2014

An overview of the synthesis, structures and reaction chemistry of coordination complexes featuring an acceptor with at least one lone pair and at least one phosphine donor is presented. One or more examples of complexes have been structurally-characterized for the majority of p-block elements ...

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RhIII-catalyzed dual directing group assisted sterically hindered C–H bond activation: a unique route to meta and ortho substituted benzofurans

21.10.2014 | Chien-Hung Yeh; Wei-Chen Chen; Parthasarathy Gandeepan; Ya-Chun Hong; Cheng-Hung Shih; Chien-Hong Cheng, Organic & Biomolecular Chemistry, 2014

A new strategy for the synthesis of highly substituted benzofurans from meta-substituted hydroxybenzenes and alkynes via a rhodium(iii)-catalyzed activation of a sterically hindered C–H bond is demonstrated. A possible mechanism involving dual directing group assisted ortho C–H bond activation is ...

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Green synthesis of peptide-templated fluorescent copper nanoclusters for temperature sensing and cellular imaging

21.10.2014 | Hong Huang; hua Li; Ai-Jun Wang; Shuxian zhong; Keming Fang; Jiu-Ju Feng, Analyst, 2014

A simple and green approach was developed for preparation of fluorescent Cu nanoclusters (NCs) using artificial peptide CLEDNN as a template. The as-synthesized Cu NCs exhibited high fluorescence quantum yield (7.3%) and good stability, along with excitation and temperature dependent fluorescent ...

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Synthesis and characterisation of lanthanide-hydroporphyrin dyads

21.10.2014 | Ruisheng Xiong; Julien Andres; Kira Scheffler; Eszter Borbas, Dalton Transactions, 2014

Fluorescence spectroscopy is in many ways the ideal tool for the interrogation of complex biological systems, as it is non-invasive, sensitive, and offers high spatiotemporal resolution. For biomedical imaging luminescent probes absorbing and emitting in the red-to-near infrared (NIR) region are ...

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Novel D-glucosamine-derived pyridyl-triazole@palladium catalyst for solvent-free Mizoroki-Heck reactions and its application in the synthesis of Axitinib

21.10.2014 | Chao Shen; Hongyun Shen; Ming Yang; Chengcai Xia; pengfei zhang, Green Chemistry, 2014

A green method for the synthesis of D-glucosamine-derived triazole@palladium catalyst has been described. The synthesized catalyst containing a 2-pyridyl-1,2,3-triazole ligand was prepared via a click route in high yield and was explored in Heck cross-coupling reactions between different aryl ...

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Synthesis, Characterization, and Physical Properties of a Poly(acrylamide-co-4-cyanobiphenyl-4[prime or minute]-oxyundecylacrylate)

21.10.2014 | Tahseen Kamal; Soo-Young Park, New Journal of Chemistry, 2014

A series of copolymers containing 4-cyanobiphenyl-4′-oxyundecylacrylate (LC11) as hydrophobic liquid crystal (LC) units and acrylamide (AAm) as hydrophilic units were synthesized by free radical polymerization. 1H NMR spectra of the copolymers confirmed the successful copolymerization. The ...

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A cheap and facile route to synthesize monodisperse magnetic nanocrystals and application as MRI agent

21.10.2014 | guixin yang; fei he; ruichan lv; shili gai; Ziyong Cheng; yunlu dai; piaoping yang, Dalton Transactions, 2014

A facile solution-based thermal decomposition strategy, using very cheap polyisobutene succimide (PIBSI) and paraffin oil as surfactant and solvent, has been developed for the controllable synthesis of magnetic MnFe2O4 and CoFe2O4 nanocrystals (NCs) with high dispersibility, uniform shape, and ...

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