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439 Newest Publications in chemical communication

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Furosemide's one little hydrogen atom: NMR crystallography structure verification of powdered molecular organics

04-May-2016 | Cory M. Widdifield; Harry Robson; Paul Hodgkinson, Chemical Communication, 2016

The potential of NMR crystallography to verify molecular crystal structures deposited in structural databases is evaluated, with two structures of the pharmaceutical furosemide serving as examples. While the structures differ in the placement of one H atom, using this approach, we verify one of ...

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A robust and luminescent covalent organic framework as a highly sensitive and selective sensor for detection of Cu2+ ion

27-Apr-2016 | Xiaoming Liu; Zhongping Li; Yuwei Zhang; Hong Xia; Ying Mu, Chemical Communication, 2016

A hydrogen bond assisted azine-linked covalent organic framework, COF-JLU3 was synthesized under solvothermal conditions. Combing excellent crystallinity, porosity, stability and luminescence, it can be first COF as fluorescent sensor for toxic metal ions, and exhibited a highly sensitivity and ...

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Iridium-catalysed ortho-H/D and -H/T Exchange under Basic Conditions: C-H Activation of Unprotected Tetrazoles

26-Apr-2016 | W J Kerr; David M Lindsay; Marc Reid; Jens Atzrodt; Volker Derdau; Patrick Rojahn; Remo Weck, Chemical Communication, 2016

The first examples of selective ortho-directed C-H activation with unprotected 2-aryltetrazoles are described. A new base-assisted protocol for iridium (I) hydrogen isotope exchange catalysis allows access to ortho-deuterated and tritiated tetrazoles, including the tetrazole-containing ...

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Tetrahedral Cage Complex with Planar Vertices: Selective Synthesis of Pt4L6 Cage Complexes Involving Hydrogen Bonds Driven by Halide Binding

26-Apr-2016 | Masaki Ito; Masato Iseki; masumi Itazaki; Hiroshi Nakazawa, Chemical Communication, 2016

The reaction of Fe(η-C5H4NHC(O)PPh2)2 (L) with PtX2(PPh3)2 selectively formed cage-shaped complexes formulated as [(PtX)4(L)6]X4∙CHCl3 (X = Cl, Br), in which the four square-planar Pt fragments were situated at each vertex and the six Ls were located in each side of a tetrahedral framework and ...

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An optimal hydrogen-bond surrogate for [small alpha]-helices

19-Apr-2016 | Stephen T. Joy; Paramjit S. Arora, Chemical Communication, 2016

Substitution of a main chain i → i + 4 hydrogen bond with a covalent bond can nucleate and stabilize the α-helical conformation in peptides. Herein we describe the potential of different alkene isosteres to mimic intramolecular hydrogen bonds and stabilize α-helices in diverse peptide sequences.

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Supramolecular organic networks assembled from quadruple hydrogen-bonding motifs

19-Apr-2016 | huang xue; Yan-Chao Zhao; Bao-Hang Han, Chemical Communication, 2016

We prepared a rigid triptycene derivative with three 2-ureido-4[1H]-pyrimidinone terminals, which was employed to construct hydrogen-bonded organic polymer (HOP-1). The supramolecuar organic polymer HOP-1 is permannently porous, exhibting outstanding sorption selectivity towards carbon dioxide ...

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Co/CoO nanoparticles immobilized on Co–N-doped carbon as trifunctional electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions

14-Apr-2016 | Xian Zhang; Rongrong Liu; Yipeng Zang; Guoqiang Liu; Guozhong Wang; Yunxia Zhang; Haimin Zhang; Huijun Zhao, Chemical Communication, 2016

Co/CoO nanoparticles immobilized on Co–N-doped carbon were successfully developed using shrimp-shell derived N-doped carbon nanodots as precursors by a combined approach of polymerization and pyrolysis, as electrocatalysts exhibiting trifunctional catalytic activities toward oxygen reduction, ...

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Dye-sensitized photocatalytic hydrogen production: distinct activity in a glucose derivative of a phenothiazine dye

13-Apr-2016 | N. Manfredi; B. Cecconi; V. Calabrese; A. Minotti; F. Peri; R. Ruffo; M. Monai; I. Romero-Ocaña; T. Montini; P. Forn ..., Chemical Communication, 2016

A thiophene-based donor–acceptor phenothiazine dye has been functionalized with a peripheral glucose unit (PTZ-GLU) to bust its affinity to water and enhance dye-sensitized photogeneration of hydrogen. Compared to the corresponding alkyl derivative (PTZ-ALK), as well as the common hydrophilic ...

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Exploiting the Interactions of Aromatic Units for Folding and Assembly in Aqueous Environments

13-Apr-2016 | Brian Aki Ikkanda; Brent Iverson, Chemical Communication, 2016

A variety of non-covalent interactions (including hydrogen bonding, ionic interactions, metal coordination and desolvation/solvation) have been utilized to organize oligomers into well-defined structures. Herein is described a survey of aromatic foldamers that capitalize on electrostatic ...

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Re-engineering a NiFe hydrogenase to increase the H2 production bias while maintaining native levels of O2 tolerance

06-Apr-2016 | Lindsey Flanagan; John Wright; Maxie Roessler; James WB Moir; Alison Parkin, Chemical Communication, 2016

Naturally occurring oxygen tolerant NiFe membrane bound hydrogenases have a conserved catalytic bias towards hydrogen oxidation which limits their technological value. We present an Escherichia coli Hyd-1 amino acid exchange that apparently causes the catalytic rate of H2 production to double but ...

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