Archive for December, 2014

Top 25 ChemComm articles for July–September 2014

We are delighted to share with you the top 25 most downloaded articles in Chemical Communications (ChemComm) from July–September 2014.

Alzheimer’s disease amyloid beta converting left-handed Z-DNA back to right-handed B-form
Jie Geng, Chuanqi Zhao, Jinsong Ren and Xiaogang Qu
DOI: 10.1039/C0CC02049D, Communication

Fabricating graphene supercapacitors: highlighting the impact of surfactants and moieties
Dale A. C. Brownson and Craig E. Banks
DOI: 10.1039/C1CC11276G, Communication
From themed collection Emerging Investigators 2012

Two-dimensional layered composite photocatalysts
Jingxiang Low, Shaowen Cao, Jiaguo Yu and Swelm Wageh
DOI: 10.1039/C4CC02553A, Feature Article

Highly plasmon-enhanced upconversion emissions from Au@β-NaYF4:Yb,Tm hybrid nanostructures
Ning Liu, Weiping Qin, Guanshi Qin, Tao Jiang and Dan Zhao
DOI: 10.1039/C1CC11179E, Communication

A hydrophobic hole transporting oligothiophene for planar perovskite solar cells with improved stability
Lingling Zheng, Yao-Hsien Chung, Yingzhuang Ma, Lipei Zhang, Lixin Xiao, Zhijian Chen, Shufeng Wang, Bo Qu and Qihuang Gong
DOI: 10.1039/C4CC04680C, Communication

A rapid synthesis of high aspect ratio copper nanowires for high-performance transparent conducting films
Shengrong Ye, Aaron R. Rathmell, Ian E. Stewart, Yoon-Cheol Ha, Adria R. Wilson, Zuofeng Chen and Benjamin J. Wiley
DOI: 10.1039/C3CC48561G, Communication

Star-shaped hole transporting materials with a triazine unit for efficient perovskite solar cells
Kwangseok Do, Hyeju Choi, Kimin Lim, Hyunjun Jo, Jin Woo Cho, Mohammad K. Nazeeruddin and Jaejung Ko
DOI: 10.1039/C4CC04550E, Communication

Incorporation of iron hydrogenase active sites into a highly stable metal–organic framework for photocatalytic hydrogen generation
Koroush Sasan, Qipu Lin, ChengYu Mao and Pingyun Feng
DOI: 10.1039/C4CC03946G, Communication

Electrochemical activation of carbon dioxide in ionic liquid: synthesis of cyclic carbonates at mild reaction conditions
Hongzhou Yang, Yanlong Gu, Youquan Deng and Feng Shi
DOI: 10.1039/B108451H, Communication

A quick, simple, robust method to measure the acidity of ionic liquids
John Gräsvik, Jason P. Hallett, Trang Quynh To and Tom Welton
DOI: 10.1039/C4CC02816C, Communication

Modulating DNA-templated silver nanoclusters for fluorescence turn-on detection of thiol compounds
Zhengzhen Huang, Fang Pu, Youhui Lin, Jinsong Ren and Xiaogang Qu
DOI: 10.1039/C0CC05651K, Communication

CH3NH3PbI(3−x)(BF4)x: molecular ion substituted hybrid perovskite
Satyawan Nagane, Umesh Bansode, Onkar Game, Shraddha Chhatre and Satishchandra Ogale
DOI: 10.1039/C4CC04537H, Communication

Fluorescent probes for hydrogen sulfide detection and bioimaging
Fabiao Yu, Xiaoyue Han and Lingxin Chen
DOI: 10.1039/C4CC03312D, Feature Article

Synthesis of 1,2-amino alcohols via catalytic C–H amidation of sp3 methyl C–H bonds

Taek Kang, Heejeong Kim, Jeung Gon Kim and Sukbok Chang
DOI: 10.1039/C4CC05655H, Communication

Synthesis and characterization of multi-helical DNA–silica fibers
Yuanyuan Cao, Junjie Xie, Ben Liu, Lu Han and Shunai Che
DOI: 10.1039/C2CC37470F, Communication

Recent advances in the catalytic asymmetric 1,3-dipolar cycloaddition of azomethine ylides
Javier Adrio and Juan C. Carretero
DOI: 10.1039/C4CC04381B, Feature Article

Wet chemical synthesis of silver nanorods and nanowires of controllable aspect ratio
Nikhil R. Jana, Latha Gearheart and Catherine J. Murphy
DOI: 10.1039/B100521I, Communication

A metal free domino synthesis of 3-aroylindoles via two sp3 C–H activation
Anupal Gogoi, Anju Modi, Srimanta Guin, Saroj Kumar Rout, Debapratim Das and Bhisma K. Patel
DOI: 10.1039/C4CC04407J, Communication

Self-assembly of supramolecularly engineered polymers and their biomedical applications
Dali Wang, Gangsheng Tong, Ruijiao Dong, Yongfeng Zhou, Jian Shen and Xinyuan Zhu
DOI: 10.1039/C4CC03155E, Feature Article
From themed collection Polymer Self-Assembly

Nitrogen-centered radical-mediated C–H imidation of arenes and heteroarenes via visible light induced photocatalysis
Hyejin Kim, Taehoon Kim, Dong Gil Lee, Sang Weon Roh and Chulbom Lee
DOI: 10.1039/C4CC03905J, Communication

Visible light-promoted metal-free sp3-C–H fluorination
Ji-Bao Xia, Chen Zhu and Chuo Chen
DOI: 10.1039/C4CC05650G, Communication

Cu-Catalyzed Suzuki–Miyaura reactions of primary and secondary benzyl halides with arylboronates
Yan-Yan Sun, Jun Yi, Xi Lu, Zhen-Qi Zhang, Bin Xiao and Yao Fu
DOI: 10.1039/C4CC05376A, Communication

Nanostructured electrochromic smart windows: traditional materials and NIR-selective plasmonic nanocrystals

Evan L. Runnerstrom, Anna Llordés, Sebastien D. Lounis and Delia J. Milliron
DOI: 10.1039/C4CC03109A, Feature Article

Are Zr6-based MOFs water stable? Linker hydrolysis vs. capillary-force-driven channel collapse
Joseph E. Mondloch, Michael J. Katz, Nora Planas, David Semrouni, Laura Gagliardi, Joseph T. Hupp and Omar K. Farha
DOI: 10.1039/C4CC02401J, Communication

Graphene quantum dots: emergent nanolights for bioimaging, sensors, catalysis and photovoltaic devices
Jianhua Shen, Yihua Zhu, Xiaoling Yang and Chunzhong Li
DOI: 10.1039/C2CC00110A, Feature Article

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σ meets π for a hole lot of bonding

Researchers in India have provided experimental verification that a co-operative σ-hole and π-hole are responsible for holding the molecules of an isothiocyanate based peptide together in its crystal lattice, showcasing the importance of weak, but highly directional interactions in structure–activity relationships.

Understanding weak intermolecular interactions, like hydrogen bonding, π-stacking and ion– π -interactions, is vital to probing the relationship between structure and properties for pharmaceutically important molecules such as highly reactive organic isothiocyanates, which display anti-carcinogenic activity.

Read the full article in Chemistry World»

Read the original journal article in ChemComm – it’s free to download until 21st January 2015:

Observation of a reversible isomorphous phase transition and an interplay of “σ-holes” and “π-holes” in Fmoc-Leu-ψ[CH2-NCS]
Rumpa Pal, Govindappa Nagendra, M. Samarasimhareddy, Vommina V. Sureshbabu and Tayur N. Guru Row
Chem. Commun., 2015,51, 933-936
DOI: 10.1039/C4CC08751H, Communication

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Novel optical trapping of aerosolised inhaler particles

The inhaler, or pressurised metered-dose inhaler (pMDI), is a well-known medical device commonly used to help people all over the world with conditions such as asthma. However little is known about the form and phase of particles ejected from the inhaler on their route from the inhaler to the lung. It is important to understand the way that the solid particles behave once they are discharged from an inhaler as the size of a particle affects where it is delivered in the respiratory tract, ultimately determining the efficacy of the treatment.

Experimental setup used to trap and study particles discharged from a Salamon® inhaler.

In a collaboration between the University of Cambridge, Imperial College London, the University of Birmingham and the Central Laser Facility in Oxford, Tong et al. have used an optical trap to stably suspend individual particles discharged from a Salamon® inhaler for the first time. After stably trapping the particles the authors were able to determine the phase of the particles by comparing them to both a solid crystalline sample and nebulised aqueous droplets of the drug used in the Salamon® inhaler (salbutamol sulphate). Particles were also trapped and studied after being passed through a humidity chamber designed to mimic the lungs.

When first dispensed from the inhaler the particles had analogous properties to the solid crystalline sample of the drug. As the particles were exposed to a higher humidity they became more spherical as they absorbed water from the environment around them. Particles trapped at a relative humidity >92% had properties very similar to that of nebulised aqueous droplets of the drug. This change in morphology of the particles was confirmed by a combination of Raman spectroscopy and brightfield images.

Tong et al. have been able to show that once released into the body the crystalline particles take up    water, causing the particles to increase in size and sphericity. This information will be of great aid in understanding and improving the efficiency of aerosol-based inhalation products.

To download the full article for free for a limited time* click the link below:

Rapid interrogation of the physical and chemical characteristics of salbutamol sulphate aerosol from a pressurised metered-dose inhaler (pMDI)
H.-J. Tong, C. Fitzgerald, P. J. Gallimore, M. Kalberer, M. K. Kuimova, P. C. Seville, A. D. Ward and F. D. Pope
DOI: 10.1039/c4cc05803h

*Access is through a registered RSC account – click here to register

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Boron and beryllium finally shake hands

The first non-cluster bond between boron and beryllium has been reported by scientists in Germany.

10 years ago, few reactions existed where boron behaved as an nucleophile. That all changed with the advent of lithium diazaborolide in 2006, and boron has been partnering up with myriad main-group, transition metal and lanthanide elements ever since. However, despite beryllium sitting right next to boron in the periodic table, a classical two-centre/two-electron bond had never been reported between the two neighbours, until now.

Read the full article in Chemistry World»

Read the original journal article in ChemComm – it’s free to access until 6th January 2015:
Beryllium bis(diazaborolyl): old neighbors finally shake hands
T. Arnold, H. Braunschweig, W. C. Ewing, T. Kramer, J. Mies and J. K. Schuster  
Chem. Commun., 2015, Advance Article
DOI: 10.1039/C4CC08519A, Communication

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