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Chemical Communications: Chem Comm

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https://www.readbyqxmd.com/read/30028459/self-assembly-of-conformationally-flexible-molecules-under-2d-confinement-structural-analysis-from-computer-simulations
#1
Damian Nieckarz, Paweł Szabelski
Monte Carlo simulations were used to decipher the individual role of tripod molecular conformers in the surface-confined metal-organic self-assembly. Our calculations revealed the extent of structural heterogeneity introduced by the different conformers.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30028458/diastereoselective-self-assembly-of-bisheptahelicene-on-cu-111
#2
Anaïs Mairena, Manfred Parschau, Johannes Seibel, Martin Wienke, Daniel Rentsch, Andreas Terfort, Karl-Heinz Ernst
Stereochemical effects during two-dimensional crystallization of bisheptahelicene diastereomers on a Cu(111) surface have been studied with scanning tunnelling microscopy. The (M,M)- and (P,P)-enantiomers crystallize into a monolayer racemate lattice, whereas the (M,P)-diastereomers aggregate into their own monolayer phase.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30028456/controlling-the-phase-and-morphology-of-amorphous-se-nanoparticles-their-prolonged-stabilization-and-anticancer-efficacy
#3
Apurav Guleria, Snigdha Chakraborty, Suman Neogy, Dharmendra K Maurya, Soumyakanti Adhikari
Applications of amorphous Se nanoparticles (NPs) are limited due to their meticulous synthetic procedures and rapid phase transformation leading to low stability. A highly facile one-pot green method is being reported, wherein apart from tuning the morphology and the phase of the Se NPs, their stabilization could be prolonged to months as compared to a few minutes-to-days, known hitherto.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30028455/correction-an-efficient-and-recyclable-ionic-diphosphine-based-ir-catalyst-for-hydroaminomethylation-of-olefins-with-h-2-o-as-the-hydrogen-source
#4
Huan Liu, Da Yang, Dong-Liang Wang, Peng Wang, Yong Lu, Giang Vo-Thanh, Ye Liu
Correction for 'An efficient and recyclable ionic diphosphine-based Ir-catalyst for hydroaminomethylation of olefins with H2O as the hydrogen source' by Huan Liu et al., Chem. Commun., 2018, 54, 7979-7982.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30028454/detection-of-a-transient-fe-v-o-oh-species-involved-in-olefin-oxidation-by-a-bio-inspired-non-haem-iron-catalyst
#5
Shuangning Xu, Jedidiah J Veach, Williamson N Oloo, Kevin C Peters, Junyi Wang, Richard H Perry, Lawrence Que
The Fe(TPA) (TPA = tris(pyridyl-2-methyl)amine) class of non-haem Fe catalysts is proposed to carry out selective hydrocarbon oxidations through the generation of high-valent iron species. Using ambient mass spectrometry, we obtain direct evidence for the formation of an FeV(O)(OH) species under catalytic conditions. In addition, 18O-labelling suggests that this FeV(O)(OH) species serves as the active oxidant in hydrocarbon oxidation catalysis.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027965/1-2-diarylation-of-alkenes-with-aryldiazonium-salts-and-arenes-enabled-by-visible-light-photoredox-catalysis
#6
Xuan-Hui Ouyang, Jiang Cheng, Jin-Heng Li
A mild and general visible light photoredox catalysis-induced intermolecular three-component alkene 1,2-diarylation involving aryl C(sp2)-H functionalization is described. The key to controlling the chemoselectivity toward alkene 1,2-diarylation is the employment of a 2,2'-bipyridine base, thus allowing the formation of two new C(sp3)-C(sp2) bonds via aryl radical formation from aryldiazonium salts, addition across the C[double bond, length as m-dash]C bonds, and aryl C(sp2)-H functionalization cascades.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027963/two-dimensional-self-assembled-nanostructures-of-nucleobases-and-their-related-derivatives-on-au-111
#7
Yuanqi Ding, Xinyi Wang, Lei Xie, Xinyi Yao, Wei Xu
The construction of two-dimensional (2D) self-assembled nanostructures has been one of the considerably interesting areas of on-surface chemistry in the past few decades, and has benefited from the rapid development and improvement of scanning probe microscopy techniques. In this research field, many attempts have been made in the controllable fabrication of well-ordered and multifunctional surface nanostructures, which attracted interest because of the prospect for artificial design of functional molecular nanodevices...
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027958/a-novel-design-of-a-polynuclear-co-delivery-system-for-safe-and-efficient-cancer-therapy
#8
Lei Xing, Jia-Liang Zhang, Tian-Jiao Zhou, Yu-Jing He, Peng-Fei Cui, Jia-Hui Gong, Minjie Sun, Jin-Jian Lu, Zhangjian Huang, Liang Jin, Hu-Lin Jiang
We report a novel and easy-to-fabricate polynuclear nanoparticle based on the collaborative re-assembly of nanoparticles as a robust chemogene co-delivery platform. Specifically, the polynuclear nanoparticle carrying DOX and siBcl-2 exerts remarkable co-delivery efficiency, increases tumour cell apoptosis and inhibits tumour cell proliferation in vitro and in vivo.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027954/complexation-of-asymmetric-diborenes-with-magnesium-bromide
#9
Wei Lu, Rei Kinjo
The synthesis of neutral Mg complexes of asymmetric diborenes is reported. X-ray diffraction analysis reveals that the Mg center is unsymmetrically coordinated to the B2 units of diborenes. Theoretical calculations manifest the donation of electrons from the π-type orbitals of diborenes to an empty orbital of Mg.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027953/rational-design-of-atomically-dispersed-nickel-active-sites-in-%C3%AE-mo-2-c-for-the-hydrogen-evolution-reaction-at-all-ph-values
#10
Ting Ouyang, An-Na Chen, Zhen-Zhao He, Zhao-Qing Liu, Yexiang Tong
Atomically dispersed Ni species on β-Mo2C (Ni/β-Mo2C) is designed and synthesized through a simple thermal treatment process. Benefitting from the synergistic effect between Ni species and β-Mo2C, Ni/β-Mo2C exhibits high activities for the HER at all pH values.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027952/insights-into-%C3%AE-ketoacyl-chain-recognition-for-%C3%AE-ketoacyl-acp-utilizing-ahl-synthases
#11
Mila Nhu Lam, Dastagiri Dudekula, Bri Durham, Noah Collingwood, Eric C Brown, Rajesh Nagarajan
Beta-ketoacyl-ACP utilizing enzymes in fatty acid, polyketide and acyl-homoserine lactone biosynthetic pathways are important targets for developing antimicrobial, anticancer and antiparasitic compounds. Published reports on successful isolation of beta-ketoacyl-ACPs in a laboratory remain scarce to date and thus most beta-ketoacyl-ACP utilizing enzymes are routinely characterized using small molecule substrates in lieu of the bonafide 3-oxoacyl-ACPs. We report the systematic investigation into the electronic, geometric and spatial aspects of beta-ketoacyl-chain recognition to develop 3-oxoacyl-ACP substrate mimics for two beta-ketoacyl-ACP utilizing quorum signal synthases...
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027951/unexpected-reactivity-of-cyclic-perfluorinated-iodanes-with-electrophiles
#12
Stefan Gruber, Simon M Ametamey, Roger Schibli
We have found that cyclic perfluorinated iodanes react with electrophiles (E+ = Br, Cl, F, I) to afford perfluorinated E-RF compounds. This reactivity is unexpected since cyclic perfluorinated iodanes are considered as electrophilic reagents that normally react with nucleophiles (e.g. Nu- = SR, OR) to afford Nu-RF products. The utility of this new transformation is demonstrated for a [18F]CF3CF2-containing compound which was prepared from [18F]XeF2 obtained from cyclotron produced [18F]fluoride.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027944/a-biosensor-based-on-a-3d-dna-walking-machine-network-and-distance-controlled-electrochemiluminescence-energy-transfer-for-ultrasensitive-detection-of-tenascin-c-and-lead-ions
#13
Zi-Qi Xu, Pu Zhang, Ya-Qin Chai, Hai-Jun Wang, Ruo Yuan
An electrochemiluminescence biosensor was proposed based on distance-controlled energy transfer and a 3D-DNA walking machine network to significantly improve mass transport and offer an ultrasensitive and controllable strategy for the detection of different types of target.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027197/uracil-grafted-imine-based-covalent-organic-framework-for-nucleobase-recognition
#14
Sergio Royuela, Eduardo García-Garrido, Miguel Martín Arroyo, María J Mancheño, María M Ramos, David González-Rodríguez, Álvaro Somoza, Félix Zamora, José L Segura
An imine-based covalent organic framework (COF) decorated in its cavities with uracil groups has shown selective recognition towards adenine in water. These results show how the confinement of the base-pair inside the COF's pores allows a remarkable selective recognition in aqueous media.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027190/correction-heparin-induced-tau-filaments-are-structurally-heterogeneous-and-differ-from-alzheimer-s-disease-filaments
#15
Yann Fichou, Michael Vigers, Andrew K Goring, Neil A Eschmann, Songi Han
Correction for 'Heparin-induced tau filaments are structurally heterogeneous and differ from Alzheimer's disease filaments' by Yann Fichou et al., Chem. Commun., 2018, 54, 4573-4576.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30027188/a-molecular-regulation-strategy-towards-low-voltage-driven-multi-degree-of-freedom-ipmc-catheters
#16
Chao Lu, Lei Zhao, Yimin Hu, Wei Chen
A multi degree of freedom ionic polymer-metal composite (IPMC) active catheter with controllable bending ability (from micrometer to millimeter level) under a low voltage (∼1.0 V) was developed. And its actuation properties were enhanced effectively through a molecular-regulation strategy.
July 20, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30024583/csp-3-h-bond-functionalization-of-amines-via-tunable-iminium-ions-divergent-synthesis-of-trifluoromethylated-arylamines
#17
Lou Shi, Mingshan Wang, Ling Pan, Yifei Li, Qun Liu
A series of tunable iminium ions, generated in situ by the condensation of 4-trifluoromethyl-p-quinols with cyclic amines, can lead to the divergent synthesis of trifluoromethylated arylamines in a single step via redox-neutral isomerization. The direct α- and β-functionalization of saturated amines can be achieved regioselectively under mild conditions.
July 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30024578/chiral-supramolecular-coordination-cages-as-high-performance-inhibitors-against-amyloid-%C3%AE-aggregation
#18
Ling-Yu Bao, Si-Jia Hao, Sai-Fei Xi, Xiaodong Yan, Hai-Xia Zhang, Rui Shen, Zhi-Guo Gu
Four pairs of chiral supramolecular coordination cages were facilely synthesized, and they could efficiently inhibit amyloid-β (Aβ) aggregation with a high inhibition rate of 0.64-0.86. This research provides a new perspective on the design of chiral Aβ inhibitors using supramolecular metal-organic cages.
July 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30023996/novel-d-a-d-based-near-infrared-probes-for-the-detection-of-%C3%AE-amyloid-and-tau-fibrils-in-alzheimer-s-disease
#19
Yuying Li, Kan Wang, Kaixiang Zhou, Wentao Guo, Bin Dai, Yi Liang, Jiapei Dai, Mengchao Cui
Novel D-π-A-π-D probes were investigated for the detection of Aβ plaques and NFTs. The probes displayed remarkable optical properties, and DADNIR-2 possessed high affinity towards Tau and Aβ aggregates (Kd = 0.41 nM and 1.04 nM, respectively) with certain selectivity. DADNIR-2 could penetrate the BBB and label Aβ plaques in vivo.
July 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30023992/supramolecular-nanoparticles-based-on-%C3%AE-cd-modified-hyaluronic-acid-for-dna-encapsulation-and-controlled-release
#20
Yang Yang, Xin Jia, Ying-Ming Zhang, Nan Li, Yu Liu
Supramolecular nanoparticles composed of doubly positively charged adamantane (ADA2+) and β-CD modified hyaluronic acid (HACD) were constructed. When the ester group in ADA2+ was hydrolyzed to a carboxyl group, the quaternary ammonium chain with a positive charge in ADA2+ converted to a "zwitterionic" structure, and the controlled binding and release of pDNA was realized.
July 19, 2018: Chemical Communications: Chem Comm
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