Chem. Commun.

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Simultaneous SERS detection and imaging of two biomarkers on the cancer cell surface by self-assembly of branched DNA-gold nanoaggregates

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9907-9909
DOI: 10.1039/C4CC05226A, CommunicationYing Li, Xindi Qi, Chengcun Lei, Qifeng Yue, Shusheng Zhang
A surface-enhanced Raman scattering (SERS) method has been proposed for simultaneous detection and imaging of two biomarkers on the surface of a single human breast cancer cell (MCF-7) by self-assembly of branched DNA-gold nanoaggregates.
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Nanoscale metal-organic frameworks as highly sensitive luminescent sensors for Fe2+ in aqueous solution and living cells

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9969-9972
DOI: 10.1039/C4CC04524F, CommunicationYe Lu, Bing Yan, Jin-Liang Liu
We report the exploration of fluorescent nanoscale metal-organic frameworks (nMOF-253s) for highly selective and sensitive detection of Fe2+ ions in aqueous solution. Moreover, nMOF-253 of 50 nm is successfully applied in fluorescent bioimaging and intracellular Fe2+ sensing in HeLa cells.
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Convergent and divergent two-dimensional coordination networks formed through substrate-activated or quenched alkynyl ligation

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9973-9976
DOI: 10.1039/C4CC03723E, CommunicationJan Cechal, Christopher S. Kley, Takashi Kumagai, Frank Schramm, Mario Ruben, Sebastian Stepanow, Klaus Kern
Ni-alkynyl coordination can be quenched or activated depending on the metal surface leading to long-range ordered or random networks, respectively.
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A highly selective water-soluble optical probe for endogenous peroxynitrite

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9947-9950
DOI: 10.1039/C4CC04192E, CommunicationJi-Ting Hou, Jin Yang, Kun Li, Ye-Xin Liao, Kang-Kang Yu, Yong-Mei Xie, Xiao-Qi Yu
A water-soluble colorimetric and fluorescent probe C-Py-1 for ONOO- was prepared and it could exhibit high sensitivity and excellent selectivity toward ONOO- among ROS and RNS with a rapid response time. Meanwhile, it was successfully applied in the imaging of endogenous ONOO- in RAW264.7 cells.
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Self-assembly of NH2-([small alpha],L-lysine)5-COOH and SDS into nanodiscs or nanoribbons regulated by pH

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9943-9946
DOI: 10.1039/C4CC04035J, CommunicationS. Zhang, S. Yang, J. Zang, R. Yang, G. Zhao, C. Xu
NH2-([small alpha],L-lysine)5-COOH and SDS can self-assemble into nanodiscs or nanoribbons regulated by pH.
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New conjugated molecular scaffolds based on [2,2]paracyclophane as electron acceptors for organic photovoltaic cells

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9939-9942
DOI: 10.1039/C4CC04384G, CommunicationYang Yang, Guanxin Zhang, Chenmin Yu, Chang He, Jianguo Wang, Xin Chen, Jingjing Yao, Zitong Liu, Deqing Zhang
Two conjugated molecules with a [2,2]paracyclophane framework were synthesized for solution-processed BHJ solar cells. With P3HT as the donor, the best power conversion efficiency (PCE) of 2.69% was obtained.
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Direct oxidative nitration of aromatic sulfonamides under mild conditions

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9936-9938
DOI: 10.1039/C4CC03784G, CommunicationYing-Xiu Li, Lian-Hua Li, Yan-Fang Yang, Hui-Liang Hua, Xiao-Biao Yan, Lian-Biao Zhao, Jin-Bang Zhang, Fa-Jin Ji, Yong-Min Liang
This efficient reaction proceeds under very mild conditions with low cost nitration reagents and can be applied in gram-scale preparation.
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A label-free double-amplification system for sensitive detection of single-stranded DNA and thrombin by liquid chromatography-mass spectrometry

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9846-9848
DOI: 10.1039/C4CC03559C, CommunicationWenbo Zhao, Zhen Qin, Chengsen Zhang, Meiping Zhao, Hai Luo
A label-free double amplification system has been developed by using a ternary DNA probe containing the poly(adenine-thymine) sequence assisted by exonuclease III degradation.
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In situ TEM observation of the structural transformation of rutile TiO2 nanowire during electrochemical lithiation

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9932-9935
DOI: 10.1039/C4CC04161E, CommunicationSung Joo Kim, Sun-Young Noh, Alireza Kargar, Deli Wang, George W. Graham, Xiaoqing Pan
A rutile TiO2 nanowire undergoes a two-step phase transformation during lithiation, as observed in real time via transmission electron microscopy.
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A facile synthetic route to poly(p-phenylene terephthalamide) with dual functional groups

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9929-9931
DOI: 10.1039/C4CC02366H, CommunicationShuming Du, Wenbin Wang, Yan Yan, Jie Zhang, Ming Tian, Liqun Zhang, Xinhua Wan
Claisen rearrangement reaction introduces simultaneously allyl and hydroxyl groups to PPTA chains, and improves the interface structure and interfacial adhesion of Kevlar fiber reinforced composites.
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A facile access to substituted benzo[a]fluorenes from o-alkynylbenzaldehydes via in situ formed acetals

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9925-9928
DOI: 10.1039/C4CC03934C, CommunicationSeetharaman Manojveer, Rengarajan Balamurugan
Bronsted acid catalysed reaction of o-alkynylbenzaldehydes with arylalkynes in the presence of trimethyl orthoformate takes a different reaction pathway and results in benzo[a]fluorenes.
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Evidence of two-state reactivity in alkane hydroxylation by Lewis-acid bound copper-nitrene complexes

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9852-9854
DOI: 10.1039/C4CC03754E, CommunicationSarah-Luise Abram, Ines Monte-Perez, Florian Felix Pfaff, Erik R. Farquhar, Kallol Ray
Two state reactivity hypothesis, well established for iron-oxo cores, can also be extended to the copper-nitrenes.
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A cobalt-NHC complex as an improved catalyst for photochemical hydrogen evolution from water

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9872-9875
DOI: 10.1039/C4CC03493G, CommunicationKen Kawano, Kosei Yamauchi, Ken Sakai
A macrocyclic N-heterocyclic carbene (NHC)-cobalt complex was found to act as an improved H2-evolving catalyst in a [Ru(bpy)3]2+-sensitized photosystem using methylviologen as a redox acceptor (MV2+ + e- [rightward arrow] MV+[radical dot], MV2+ = N,N[prime or minute]-dimethyl-4,4[prime or minute]-bipyridinium), which provides a driving force of only 150 meV for H2 evolution at pH 5.0.
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One-step synthesis of "rattle-like" polymer particles via suspension polymerization

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9921-9924
DOI: 10.1039/C4CC03740E, CommunicationT. Suzuki, A. Osumi, H. Minami
Multiple particles in a polymer shell, i.e. "rattle-like" capsules, have the potential to be used in electric ink or vibro-isolating and sound absorption materials because the encapsulated small particles are movable independently. Here, we demonstrate one-step preparation of the capsules containing small particles. In the final products, encapsulated particles were movable inside the capsule.
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Functionalized graphene oxide as a nanocatalyst in dephosphorylation reactions: pursuing artificial enzymes

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9891-9894
DOI: 10.1039/C4CC03262D, CommunicationElisa S. Orth, Jessica E. S. Fonsaca, Thomas Golin Almeida, Sergio H. Domingues, Jose G. L. Ferreira, Aldo J. G. Zarbin
The first report on the use of thiol-functionalized graphene oxide as a recyclable nanocatalyst in dephosphorylation reactions with impressive activity (>105-fold).
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Regioselective synthesis and molecular structure of the first derivative of praseodymium-containing metallofullerenes

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9876-9878
DOI: 10.1039/C4CC02949F, CommunicationQin Zhou, Hui Li, Yongfu Lian, Mitsuaki Suzuki, Lipiao Bao, Wenting Cai, Weiwei Wang, Shigeru Nagase, Xing Lu, Takeshi Akasaka
A single praseodymium atom plays a critical role in controlling the chemical properties of the cage carbons of C82.
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Tetrabutylphosphonium ions as a new swelling/delamination agent for layered compounds

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9977-9980
DOI: 10.1039/C4CC03736G, CommunicationFengxia Geng, Renzhi Ma, Yusuke Yamauchi, Takayoshi Sasaki
Protonated layered oxides exhibit massive interlayer expansion up to [similar]100-fold in aqueous solution of an organo-phosphonium base, tetrabutylphosphonium hydroxide (TBPOH), and immediate exfoliation in 1-2 hours by shaking.
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Pseudorotaxane orientational stereoisomerism driven by [small pi]-electron density

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9917-9920
DOI: 10.1039/C4CC04668D, CommunicationCarmine Gaeta, Carmen Talotta, Placido Neri
Pseudo[2]rotaxane orientational isomers can be stereocontrolled by exploiting the electron-withdrawing or electron-donating effects of para-substituted dibenzylammonium axles threaded through a calix-wheel.
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Tuning the underwater oleophobicity of graphene oxide coatings via UV irradiation

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9849-9851
DOI: 10.1039/C4CC03940H, CommunicationHang Li, Yi Huang, Yating Mao, Weiwei L. Xu, Harry J. Ploehn, Miao Yu
UV-irradiation has been utilized as an effective and facile approach to tune the underwater oleophobicity of GO coatings/membranes by gradually modifying GO flake composition and surface morphology.
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Stabilization of [small beta]-peptide helices by direct attachment of trifluoromethyl groups to peptide backbones

3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9855-9858
DOI: 10.1039/C4CC02136C, CommunicationJoonil Cho, Kyohei Sawaki, Shinya Hanashima, Yoshiki Yamaguchi, Motoo Shiro, Kazuhiko Saigo, Yasuhiro Ishida
Direct attachment of trifluoromethyl groups to peptide backbones was found to be a novel strategy for peptide folding stabilization, where the intramolecular hydrogen-bonding ability of backbone amides is enhanced.
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