Chem. Commun.

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Lewis base mediated halogenation/semipinacol rearrangement of diazo compounds: new access to [small alpha]-halo-quaternary ketones

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9773-9775
DOI: 10.1039/C4CC04154B, CommunicationHaibin Mao, Zhongkai Tang, Hongwen Hu, Yixiang Cheng, Wen-Hua Zheng, Chengjian Zhu
A novel halogenation/semipinacol rearrangement of [small alpha]-diazo alcohol catalyzed by Lewis base has been developed through a carbene-free mechanism.
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Enoyl acyl carrier protein reductase (FabI) catalyzed asymmetric reduction of the C[double bond, length as m-dash]C double bond of [small alpha],[small beta]-unsaturated ketones: preparation of (R)-2-alkyl-cyclopentanones

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9729-9732
DOI: 10.1039/C4CC04150J, CommunicationJi Liu, Jinchuan Wu, Zhi Li
Enoyl-ACP reductase (FabI), a non-OYE type of 'ene'-reductase, catalyzed the asymmetric reduction of several 2-alkylidenecyclopentanones giving (R)-2-alkylcyclopentanones in high ee.
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An activatable, polarity dependent, dual-luminescent imaging agent with a long luminescence lifetime

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9733-9736
DOI: 10.1039/C4CC04015E, CommunicationMarcus T. M. Rood, Maria Oikonomou, Tessa Buckle, Marcel Raspe, Yasuteru Urano, Kees Jalink, Aldrik H. Velders, Fijs W. B. van Leeuwen
A combination of two quenching interactions was incorporated in a new activatable imaging agent. Partial and total activation of luminescence can be achieved, as well as luminescence lifetime imaging.
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Sensitive detection of microRNA by chronocoulometry and rolling circle amplification on a gold electrode

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9704-9706
DOI: 10.1039/C4CC03330B, CommunicationBo Yao, Yichen Liu, Miyuki Tabata, Huangtianzhi Zhu, Yuji Miyahara
An integrated gold electrode fabricated on a polystyrene substrate was developed for quantitative detection of nucleic acids by rolling circle amplification and chronocoulometry.
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"Suspended" Pt nanoparticles over TiO2 nanotubes for enhanced photocatalytic H2 evolution

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9653-9656
DOI: 10.1039/C4CC04087B, CommunicationNhat Truong Nguyen, JeongEun Yoo, Marco Altomare, Patrik Schmuki
In the present work we introduce a technique to form a photocatalyst based on minimal amounts of Pt nanoparticles suspended over the mouth of anodic TiO2 nanotubes.
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Phase transfer and dispersion of reduced graphene oxide nanosheets using cluster suprasurfactants

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9700-9703
DOI: 10.1039/C4CC04091K, CommunicationShan Wang, Haolong Li, Liying Zhang, Bao Li, Xiao Cao, Guohua Zhang, Shilin Zhang, Lixin Wu
Surfactant-encapsulated polyoxometalates (SEP) can act as cluster suprasurfactants to transfer reduced graphene oxide (RGO) from water to low polar organic solvents with single-layer RGO dispersion.
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Transparent conducting p-type thin films of c-axis self-oriented Bi2Sr2Co2Oy with high figure of merit

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9697-9699
DOI: 10.1039/C4CC03800B, CommunicationRenhuai Wei, Xianwu Tang, Ling Hu, Zhenzhen Hui, Jie Yang, Hongmei Luo, Xuan Luo, Jianming Dai, Wenhai Song, Zhaorong Yang, Xuebin Zhu, Yuping Sun
Transparent conducting p-type Bi2Sr2Co2Oy thin films show c-axis self-orientation with high figure of merit by a solution method.
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Biodegradable large compound vesicles with controlled size prepared via the self-assembly of branched polymers in nanodroplet templates

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9676-9678
DOI: 10.1039/C4CC02836H, CommunicationLong-Hai Wang, Xiao-Man Xu, Chun-Yan Hong, De-Cheng Wu, Zhi-Qiang Yu, Ye-Zi You
Generally, it is very difficult to control the size of large compound vesicles.
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Sterics level the rates of proton transfer to [Ni(XPh){PhP(CH2CH2PPh2)2}]+ (X = O, S or Se)

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9669-9671
DOI: 10.1039/C4CC04197F, CommunicationAhmed Alwaaly, Richard A. Henderson
Rates of proton transfers between lutidinium and [Ni(XPh)(PhP{CH2CH2PPh2}2)]+ (X = O, S or Se) show little variation because of sterics.
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Platinum nanoparticles supported on Ca(Mg)-zeolites for efficient room-temperature alcohol oxidation under aqueous conditions

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9679-9682
DOI: 10.1039/C4CC02685C, CommunicationYejiang Hong, Xiaoqing Yan, Xiaofeng Liao, Renhong Li, Shaodan Xu, Liping Xiao, Jie Fan
Platinum nanoparticles supported on Ca(Mg)-ZSM-5 is an efficient, highly selective and stable catalyst for room-temperature oxidation of alcohols in water.
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Plasmonic properties of triangle-shaped silver trimers selectively fabricated by near-field photo-reduction using an apertured cantilever for an atomic force microscope

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9693-9696
DOI: 10.1039/C4CC04230A, CommunicationYasutaka Kitahama, Takuya Ikemachi, Toshiaki Suzuki, Takeshi Miura, Yukihiro Ozaki
An L- or a V-shaped Ag trimer was selectively fabricated through near-field photo-reduction and observed in situ using an apertured cantilever for AFM.
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Diastereoselective synthesis of novel aza-diketopiperazines via a domino cyclohydrocarbonylation/addition process

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9657-9660
DOI: 10.1039/C4CC03660C, CommunicationPierre Regenass, Jean-Francois Margathe, Andre Mann, Jean Suffert, Marcel Hibert, Nicolas Girard, Dominique Bonnet
A short and diastereoselective synthesis of newly reported aza-diketopiperazine (aza-DKP) scaffolds starting from amino-acids was achieved using domino Rh(I)-catalyzed cyclohydrocarbonylation/addition.
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Stereoselective construction of a key hydroindole precursor of epidithiodiketopiperazine (ETP) natural products

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9690-9692
DOI: 10.1039/C4CC04148H, CommunicationMinghao Feng, Xuefeng Jiang
The functionalized hexahydroindole scaffold of ETPs was constructed by an asymmetric strategy involving a diastereoselective inverse electron-demand Diels-Alder (IEDDA) reaction.
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Rhodium-catalyzed direct synthesis of unprotected NH-sulfoximines from sulfoxides

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9687-9689
DOI: 10.1039/C4CC04349A, CommunicationJinmin Miao, Nigel G. J. Richards, Haibo Ge
A novel rhodium-catalyzed imination of sulfoxides using O-(2,4-dinitrophenyl)hydroxylamine is developed under mild conditions with good functional group tolerance.
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Superior stable sulfur cathodes of Li-S batteries enabled by molecular layer deposition

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9757-9760
DOI: 10.1039/C4CC04097J, CommunicationXia Li, Andrew Lushington, Jian Liu, Ruying Li, Xueliang Sun
We report a method for depositing a thin film of aluminium alkoxide on sulfur cathodes via molecular layer deposition. The ultrathin aluminium alkoxide inorganic-organic hybrid coating demonstrated enhanced durability to improved cycle life and rate performance of Li-S cells.
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Learning from nature: introducing an epiphyte-host relationship in the synthesis of alloy nanoparticles by co-reduction methods

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9765-9768
DOI: 10.1039/C4CC04132A, CommunicationYue Yu, Qingbo Zhang, Qiaofeng Yao, Yi Zhan, Meihua Lu, Liuqing Yang, Chaohe Xu, Jianping Xie, Jim Yang Lee
The epiphyte-host concept in botany is applied to synthesis of nanomaterials to overcome the problem of sequential deposition in alloy nanoparticle preparation.
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Dihydrolevoglucosenone (Cyrene) as a bio-based alternative for dipolar aprotic solvents

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9650-9652
DOI: 10.1039/C4CC04133J, CommunicationJames Sherwood, Mario De bruyn, Andri Constantinou, Laurianne Moity, C. Rob McElroy, Thomas J. Farmer, Tony Duncan, Warwick Raverty, Andrew J. Hunt, James H. Clark
Dihydrolevoglucosenone (Cyrene) is a bio-based molecule, derived in two simple steps from cellulose, which demonstrates significant promise as a dipolar aprotic solvent.
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Initiator-chain transfer agent combo in the RAFT polymerization of styrene

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9722-9724
DOI: 10.1039/C4CC03699A, CommunicationYing Wu, Wei Zhang, Zhengbiao Zhang, Xiangqiang Pan, Zhenping Cheng, Jian Zhu, Xiulin Zhu
A novel initiator-chain transfer agent combo was synthesized and applied in the homopolymerization of different vinyl monomers as well as copolymerization.
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Fast detection of nitroaromatics using phosphonate pyrene motifs as dual chemosensors

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9683-9686
DOI: 10.1039/C4CC03980G, CommunicationN. Venkatramaiah, Ana D. G. Firmino, Filipe A. Almeida Paz, Joao P. C. Tome
A new class of dual fluorescent chemosensors for nitroaromatic compounds (NACs) based on phosphonated pyrene derivatives is reported, showing high selectivity towards trinitrotoluene (TNT).
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Formation of a hetero[3]rotaxane by a dynamic component-swapping strategy

30 July, 2014 - 17:17

Chem. Commun., 2014, 50,9665-9668
DOI: 10.1039/C4CC03612C, CommunicationEleanor A. Wilson, Nicolaas A. Vermeulen, Paul R. McGonigal, Alyssa-Jennifer Avestro, Amy A. Sarjeant, Charlotte L. Stern, J. Fraser Stoddart
In the preparation of a hetero[3]rotaxane, the attributes of dynamic covalent chemistry are exploited by subjecting an equimolar mixture of two homo[3]rotaxanes to acid-catalysed equilibration.
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