Chem. Commun.

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N-Heterocyclic carbene-catalyzed enantioselective synthesis of functionalized cyclopentenes via [small alpha],[small beta]-unsaturated acyl azoliums

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14539-14542
DOI: 10.1039/C4CC07433E, CommunicationSantigopal Mondal, Santhivardhana Reddy Yetra, Atanu Patra, Sunita S. Kunte, Rajesh G. Gonnade, Akkattu T. Biju
Highly enantioselective NHC-organocatalyzed synthesis of functionalized cyclopentenes by the reaction of modified enals with malonic ester derivatives having a [gamma]-benzoyl group is reported.
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Synthesis of hierarchical zeolites using an inexpensive mono-quaternary ammonium surfactant as mesoporogen

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14658-14661
DOI: 10.1039/C4CC06267A, CommunicationXiaochun Zhu, Roderigh Rohling, Georgy Filonenko, Brahim Mezari, Jan P. Hofmann, Shunsuke Asahina, Emiel J. M. Hensen
The use of N-methylpiperidine as the head group in amphiphilic surfactants renders a cheap and effective method to synthesize mesoporous zeolites.
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Chitosan improves stability of carbon nanotube biocathodes for glucose biofuel cells

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14535-14538
DOI: 10.1039/C4CC04862H, CommunicationSarra El Ichi, Abdelkader Zebda, Awatef Laaroussi, Nadege Reverdy-Bruas, Didier Chaussy, Mohamed Naceur Belgacem, Philippe Cinquin, Donald K. Martin
We demonstrate a novel combined chitosan-carbon-nanotube-enzyme biocathode with a fibrous microstructure that improves the performance by creating a protective microenvironment, preventing the loss of the electrocatalytic activity of the enzyme, and providing good oxygen diffusion.
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Direct enantiospecific substitution of primary [small alpha]-aminoalkylferrocenes via Lewis acid-catalyzed C-N bond cleavage

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14531-14534
DOI: 10.1039/C4CC07196D, CommunicationMeng-Guang Zhou, Wen-Zhao Zhang, Shi-Kai Tian
Unprecedented nucleophilic substitution of primary [small alpha]-aminoalkylferrocenes has been developed in an enantiospecific fashion yielding ammonia as the sole byproduct.
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A solvent-free Diels-Alder reaction of graphite into functionalized graphene nanosheets

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14651-14653
DOI: 10.1039/C4CC07173E, CommunicationJeong-Min Seo, Jong-Beom Baek
A solvent-free Diels-Alder reaction between graphite as a diene and a typical dienophile, maleic anhydride or maleimide is developed. The functionalization of graphite with dienophiles is efficient enough for delamination of graphitic layers into graphene nanosheets upon dispersion in a polar solvent.
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Long wavelength optical control of glutamate receptor ion channels using a tetra-ortho-substituted azobenzene derivative

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14613-14615
DOI: 10.1039/C4CC06612J, CommunicationA. Rullo, A. Reiner, A. Reiter, D. Trauner, E. Y. Isacoff, G. A. Woolley
Tetra-ortho-chloro substitution shifts the optical switching of azobenzene modified glutamate receptors into the red.
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Photo-induced charge recombination kinetics in MAPbI3-xClx perovskite-like solar cells using low band-gap polymers as hole conductors

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14566-14569
DOI: 10.1039/C4CC06338D, CommunicationJose Manuel Marin-Beloqui, Javier Perez Hernandez, Emilio Palomares
We measured the charge recombination kinetics using transient photovoltage (TPV) and laser transient absorption spectroscopy (L-TAS) in MAPbI3-xClx perovskite solar cells using low band gap polymers as hole transport materials (HTMs).
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A LiFSI-LiTFSI binary-salt electrolyte to achieve high capacity and cycle stability for a Li-S battery

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14647-14650
DOI: 10.1039/C4CC06666A, CommunicationJ. J. Hu, G. K. Long, S. Liu, G. R. Li, X. P. Gao
A high capacity and stable cycle performance of the sulfur-based composite are realized in the LiFSI-LiTFSI binary-salt electrolyte, accompanied simultaneously by the homogeneous lithium deposition on the anode.
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Cobalt-containing layered or zeolitic silicates as photocatalysts for hydrogen generation

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14643-14646
DOI: 10.1039/C4CC05931J, CommunicationStefan Neatu, Marta Puche, Vicente Fornes, Hermenegildo Garcia
Co grafted or included in a silicate host is active for the overall water splitting.
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Chemically-induced redox switching of a metalloprotein reveals thermodynamic and kinetic heterogeneity, one molecule at a time

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14523-14526
DOI: 10.1039/C4CC06334A, CommunicationNamik Akkilic, Fenna van der Grient, Muhammad Kamran, Nusrat J. M. Sanghamitra
FRET-based detection of individual azurin-Cy5 molecules shows an on (reduction)-off (oxidation) fluorescence switching, reveals the redox parameters.
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An ESR and DFT study of hydration of the 2[prime or minute]-deoxyuridine-5-yl radical: a possible hydroxyl radical intermediate

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14605-14608
DOI: 10.1039/C4CC07089E, CommunicationLidia Chomicz, Alex Petrovici, Ian Archbold, Amitava Adhikary, Anil Kumar, Michael D. Sevilla, Janusz Rak
An ESR and DFT study demonstrates a simple reaction between the uridine-5-yl radical and H2O resulting in the genotoxic hydroxyl radical.
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An organocatalytic domino Michael-alkylation reaction: highly enantioselective construction of spiro-cyclopentanoneoxindoles and tetronic acid scaffolds

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14601-14604
DOI: 10.1039/C4CC05207B, CommunicationJing Zhou, Qi-Lin Wang, Lin Peng, Fang Tian, Xiao-Ying Xu, Li-Xin Wang
An asymmetric domino reaction of methyleneindolinones and [gamma]-halogenated [small beta]-ketoesters is developed to give spiro-cyclopentanoneoxindoles and tetronic acid derivatives with excellent enantioselectivites.
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Deciphering the origin of cooperative catalysis by dirhodium acetate and chiral spiro phosphoric acid in an asymmetric amination reaction

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14639-14642
DOI: 10.1039/C4CC05202A, CommunicationHemanta K. Kisan, Raghavan B. Sunoj
The transition state for enantioselective protonation by chiral phosphoric acid enjoys a cooperative stabilization offered by the dirhodium catalyst.
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A highly selective long-wavelength fluorescent probe for the detection of human carboxylesterase 2 and its biomedical applications

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14519-14522
DOI: 10.1039/C4CC06642A, CommunicationLei Feng, Zhao-Ming Liu, Liang Xu, Xia Lv, Jing Ning, Jie Hou, Guang-Bo Ge, Jing-Nan Cui, Ling Yang
A highly selective long-wavelength fluorescent probe for the detection of human carboxylesterase 2 (hCE2) has been developed and well characterized. The probe can be used for measuring the real activities of hCE2 in complex biological systems.
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Dopamine-assisted one-pot synthesis of zinc ferrite-embedded porous carbon nanospheres for ultrafast and stable lithium ion batteries

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14597-14600
DOI: 10.1039/C4CC07350A, CommunicationXiayin Yao, Chenyang Zhao, Junhua Kong, Huiqing Wu, Dan Zhou, Xuehong Lu
ZnFe2O4-embedded polydopamine-derived carbon (ZnFe2O4@CPDA) nanospheres are synthesized by in situ polymerization followed by carbonization and shown to be promising anode materials for lithium-ion batteries with excellent rate capability and cycling stability.
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Cyclization of alkynoic acids in water in the presence of a vesicular self-assembled amphiphilic pincer palladium complex catalyst

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14516-14518
DOI: 10.1039/C4CC07015A, CommunicationGo Hamasaka, Yasuhiro Uozumi
Alkynoic acids were cyclized in the presence of a vesicular palladium-based catalyst in water to give the corresponding lactones.
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Quantum-dot-tagged photonic crystal beads for multiplex detection of tumor markers

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14589-14592
DOI: 10.1039/C4CC07019D, CommunicationJuan Li, Huan Wang, Shujun Dong, Peizhi Zhu, Guowang Diao, Zhanjun Yang
Novel quantum-dot-tagged photonic crystal beads (PCBs) were fabricated for multiplex detection of tumor markers via self-assembly of quantum-dot-embedded polystyrene nanospheres into PCBs.
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New magnetic frameworks of [(CuF2(H2O)2)x(pyz)]

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14504-14507
DOI: 10.1039/C4CC06696K, CommunicationA. Lanza, C. Fiolka, M. Fisch, N. Casati, M. Skoulatos, C. Ruegg, K. W. Kramer, Piero Macchi
The magnetic exchange in mono- or bi-layer Cu-based coordination polymers is tuned by pressure.
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Synchronized synthesis of Pd@C-RGO carbocatalyst for improved anode and cathode performance for direct ethylene glycol fuel cell

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14623-14626
DOI: 10.1039/C4CC06879C, CommunicationRamanujam Kannan, Ae Rhan Kim, Kee Suk Nahm, Hong-Ki Lee, Dong Jin Yoo
The simultaneous formation of a carbocatalyst composed of 5 nm sized flower-shaped Pd nanoparticles assembled on carbon-reduced graphene oxide (Pd@C-RGO) is reported via the solid state process between 1 and 2 minutes followed by microwave irradiation and exhibits improved electrocatalytic performance for the oxidation of ethylene glycol.
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Facile synthesis of spinel CuCo2O4 nanocrystals as high-performance cathode catalysts for rechargeable Li-air batteries

29 October, 2014 - 15:54

Chem. Commun., 2014, 50,14635-14638
DOI: 10.1039/C4CC04682J, CommunicationYing Liu, Lu-Jie Cao, Chen-Wei Cao, Man Wang, Kwan-Lan Leung, Shan-Shan Zeng, T. F. Hung, C. Y. Chung, Zhou-Guang Lu
CuCo2O4 nanoparticles have been synthesized by a simple and low-cost urea combustion method and characterized as bifunctional catalysts for non-aqueous Li-air batteries.
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