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New conjugated molecular scaffolds based on [2,2]paracyclophane as electron acceptors for organic photovoltaic cells

Chem. Commun. - 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.
The content of this RSS Feed (c) The Royal Society of Chemistry

Direct oxidative nitration of aromatic sulfonamides under mild conditions

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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

Chem. Commun. - 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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Base-promoted synthesis of coumarins from salicylaldehydes and aryl-substituted 1,1-dibromo-1-alkenes under transition-metal-free conditions

Chem. Commun. - 3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9887-9890
DOI: 10.1039/C4CC04377D, CommunicationJianming Liu, Xin Zhang, Lijun Shi, Muwen Liu, Yuanyuan Yue, Fuwei Li, Kelei Zhuo
Facile synthesis of coumarin via the tandem reaction of salicylaldehyde with aryl-substituted 1,1-dibromo-1-alkene was developed.
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A metal-free dyotropic-like rearrangement of 2-oxa allylic alcohols in the presence of organoboronic acids

Chem. Commun. - 3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9879-9882
DOI: 10.1039/C4CC03450C, CommunicationWeimin Ye, Wenbo Li, Junliang Zhang
An unprecedented dyotropic-like rearrangement of 2-oxa allylic alcohols in the presence of catalytic amounts of Selectfluor and DABCO was reported.
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Highly selective directed arylation reactions via back-to-back dehydrogenative C-H borylation/arylation reactions

Chem. Commun. - 3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9883-9886
DOI: 10.1039/C4CC02499K, CommunicationEric C. Keske, Brandon D. Moore, Olena V. Zenkina, Ruiyao Wang, Gabriele Schatte, Cathleen M. Crudden
Dimeric rhodium N-heterocyclic carbene complexes are demonstrated to be effective catalyst precursors for directed C-H borylation reactions at room temperature.
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Chirality-switchable circularly polarized luminescence in solution based on the solvent-dependent helix inversion of poly(quinoxaline-2,3-diyl)s

Chem. Commun. - 3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9951-9953
DOI: 10.1039/C4CC03944K, CommunicationYuuya Nagata, Tsuyoshi Nishikawa, Michinori Suginome
Poly(quinoxaline-2,3-diyl)s containing (S)-2-methylbutoxy side chains were found to exhibit chirality-switchable blue circularly polarized luminescence (CPL).
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An STM study of molecular exchange processes in organic thin film growth

Chem. Commun. - 3 August, 2014 - 17:17

Chem. Commun., 2014, 50,9954-9957
DOI: 10.1039/C4CC03656E, CommunicationJose M. Gallego, David Ecija, Nazario Martin, Roberto Otero, Rodolfo Miranda
PCBM molecules deposited on an exTTF layer grown on Au(111) exchange places with the exTTF molecules, expelling them to the outer surface, even at 150 K, when the surface diffusion of the exTTF molecules is completely frozen.
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