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22.067 Aktuelle Fachpublikationen in Chemical Communication

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Copper-Catalyzed Cyclization of 2-Cyanobenzaldehydes and 2-Isocyanoacetates: an Efficient Strategy for the Synthesis of Substituted 1-Aminoisoquinolines

03.07.2018 | Wen Bao; Jun-Qi Wang; Xuetao Xu; Bang-Hong Zhang; Wei-Ting Liu; Lin-Sheng Lei; Huan Liang; Kun Zhang; Shao-Hua Wang, Chemical Communication, 2018

A Cu(acac)2-catalyzed cyclization reaction of 2-cyanobenzaldehydes with 2-isocyanoacetates has been successfully developed providing an efficient strategy for the synthesis of substituted 1-aminoisoquinoline. The reaction proceeds smoothly under mild conditions with high efficiency, and might ...

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A Lithium ion/Oxygen Hybrid Battery with High-Energy and High-Power

03.07.2018 | Shijia Mu; Ding Zhu; Ruixue Zhang; Kaifang Zhang; Zhendong Ding; Yungui Chen, Chemical Communication, 2018

A novel lithium ion/oxygen hybrid battery system is proposed to use the advantages and minimize the disadvantages of both lithium-ion battery (LIB) and lithium-oxygen battery (LOB). In it, LOB-part plays the extended-range and high-power-output roles. While using the discharge-priority of ...

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Kinetic barriers to [small alpha]-synuclein protofilament formation and conversion into mature fibrils

03.07.2018 | James W. P. Brown; Georg Meisl; Tuomas P. J. Knowles; Alexander K. Buell; Christopher M. Dobson; Céline Galvagnion, Chemical Communication, 2018

Oligomeric and protofibrillar aggregates that are populated along the pathway of amyloid fibril formation appear generally to be more toxic than the mature fibrillar state. In particular, α-synuclein, the protein associated with Parkinson's disease, forms kinetically trapped protofibrils in the ...

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Directed Assembly of Fullerene on Modified Au(111) Electrodes

03.07.2018 | Zhen-Feng Cai; Wei-long Dong; Ting Chen; Huijuan Yan; Dong Wang; Wei Xu; Li-jun Wan, Chemical Communication, 2018

Here we show a conceptual approach to realize the scanning probe based induced-assembly of fullerene (C60) molecules on top of a buffer organic adlayer at room temperature in solution environment. The realization of spatially-defined C60 assembly is attributed to modulation of substrate-molecular ...

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Charge effects regulate reversible CO2 reduction catalysis

03.07.2018 | Jacob B. Geri; Joanna L. Ciatti; Nathaniel K. Szymczak, Chemical Communication, 2018

Modular but geometrically constrained ligands were used to investigate the impact of key ligand design parameters (charge and bite angle) on CO2 hydrogenation and formic acid dehydrogenation activity. These studies yielded an optimized catalyst that achieved over 118 000 turnovers in CO2 ...

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Rapid access to RNA resonances by proton-detected solid-state NMR at >100 kHz MAS

03.07.2018 | Alexander Marchanka; Jan Stanek; Guido Pintacuda; Teresa Carlomagno, Chemical Communication, 2018

Fast (>100 kHz) magic angle spinning (MAS) Nuclear Magnetic Resonance (NMR) allows to combine the high sensitivity of proton detection with the absence of an intrinsic molecular weight limit in solid-state NMR. This technique enables observing for the first time narrow 1H NMR resonances for an ...

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Periodic and nonperiodic chiral self-assembled networks from 1,3,5-benzenetricarboxylic acid on Ag(111)

03.07.2018 | Joshua Lipton-Duffin; Maryam Abyazisani; Jennifer MacLeod, Chemical Communication, 2018

Surface-catalyzed reactions provide a versatile route to synthesizing new 2D materials. Here, we show that the statistical nature of an activated reaction can lead to a diversity of intermolecular bonding motifs through partially-reacted molecules. With increasing annealing, we observe different ...

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Fast, low-cost preparation of hackmanite minerals with reversible photochromic behavior using a microwave-assisted structure-conversion method

03.07.2018 | José M. Carvalho; Isabella Norrbo; Rômulo A. Ando; Hermi F. Brito; Márcia C. A. Fantini; Mika Lastusaari, Chemical Communication, 2018

A microwave-assisted structure-conversion (MASC) method was used to obtain photochromic hackmanites (M,Na)8Al6Si6O24(Cl,S)2 (M: Li, Na, and K) in a fast (12 to 20 min) one-step process. Structural conversion from Zeolite A to hackmanite minerals has been proven to be very effective through an ...

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Stereoselective synthesis of 3-spiropiperidino indolenines via SN2-type ring opening of activated aziridines with 1H-indoles/Pd-catalyzed spirocyclization with propargyl carbonates

03.07.2018 | Sajan Pradhan; Chandan Kumar Shahi; Aditya Bhattacharyya; Manas K. Ghorai, Chemical Communication, 2018

3-Spiropiperidino indolenines have been synthesized via novel Lewis acid-catalyzed SN2-type ring opening of activated aziridines with 1H-indoles followed by Pd-catalyzed dearomative spirocyclization with propargyl carbonates in up to 88% yields. The step and pot-economic transformation comprises ...

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Spontaneous separation of on-surface synthesized tris-helicenes into two-dimensional homochiral domains

03.07.2018 | Jingyi Li; Kévin Martin; Narcis Avarvari; Christian Wäckerlin; Karl-Heinz Ernst, Chemical Communication, 2018

The on-surface Ullmann coupling of 2,3-dibromo[4]helicene molecules is studied on Au(111) and Cu(111) surfaces. Bis-helicene and tris-helicene are identified with scanning tunnelling microscopy and X-ray photoelectron spectroscopy as reaction products. The produced star-shaped tris-helicenes ...

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