Chemistry - A European Journal

Cover image for Vol. 20 Issue 33

Editor: Neville Compton, Deputy Editors: Anne Deveson, Elisabeth Roedern

Impact Factor: 5.696

ISI Journal Citation Reports © Ranking: 2013: 22/148 (Chemistry Multidisciplinary)

Online ISSN: 1521-3765

Associated Title(s): Angewandte Chemie International Edition, Chemistry – An Asian Journal, ChemistryOpen, ChemBioChem, ChemCatChem, ChemElectroChem, ChemMedChem, ChemPhysChem, ChemPlusChem, ChemSusChem, European Journal of Inorganic Chemistry, European Journal of Organic Chemistry

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May 23, 2014

New Multichromophoric Ligand for Light Harvesting

New Multichromophoric Ligand for Light Harvesting

Light-harvesting antennae are of great importance for the development of efficient solar cells. Multichromophoric systems capable of harvesting light are of interest as they can be used in multicomponent systems in which the different chromophores are in close contact to favor energy and/or electron transfer, so that the excitation energy can be funneled to a specific acceptor. If one of these chromophores is also a good ligand for metal ions, new interesting properties can arise in a supramolecular system, such as control of the energy/electron transfer processes by changing the metal ion or the ability to generate supramolecular architectures and coordination polymers. To find out more about this subject read the paper by Marc Gingras, Aix-Marseille Université, France, Giacomo Bergamini, University of Bologna, Italy, and co-workers


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Recently Published Articles

  1. Total Synthesis of (R,R,R)-α-Tocopherol Through Asymmetric Cu-Catalyzed 1,4-Addition

    Dr. Andreas Ole Termath, B. Sc. Hanna Sebode, M. Sc. Waldemar Schlundt, Dr. René T. Stemmler, Dr. Thomas Netscher, Priv.-Doz. Dr. Werner Bonrath and Prof. Dr. Hans-Günther Schmalz

    Article first published online: 1 AUG 2014 | DOI: 10.1002/chem.201404379

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    An ester group makes the difference! By introducing a disposable activating substituent at C-3, the asymmetric 1,4-addition to a notoriously unreactive 2-substituted chromenone was achieved with high levels of (2R)-stereoselectivity in the presence of a chiral CuI-phosphoramidite complex as a catalyst. This paved the way for an efficient and conceptually novel synthesis of (R,R,R)-α-tocopherol from readily available starting materials (see scheme).

  2. Synthesis of Site-Specifically Phosphate-Caged siRNAs and Evaluation of Their RNAi Activity and Stability

    Dr. Li Wu, Fen Pei, Jinhao Zhang, Junzhou Wu, Mengke Feng, Yuan Wang, Dr. Hongwei Jin, Prof. Liangren Zhang and Prof. Xinjing Tang

    Article first published online: 1 AUG 2014 | DOI: 10.1002/chem.201403430

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    Custom-made cages: A complete set of new photolabile nucleoside phosphoramidites were synthesized and incorporated site-specifically into any phosphate position (see scheme). These phosphate-caged siRNAs were then systematically evaluated for their photomodulation of RNAi activity, and key phosphate positions were identified. In addition, duplex-forming-induced hydrolysis of the caging group in internally phosphate-caged siRNA was also suggested as an explanation for previous observations.

  3. Assembly of Multiple Components in a Hybrid Microcapsule: Designing a Magnetically Separable Pd Catalyst for Selective Hydrogenation

    Dr. Arlin Jose Amali, Bikash Sharma and Dr. Rohit Kumar Rana

    Article first published online: 1 AUG 2014 | DOI: 10.1002/chem.201402467

    Thumbnail image of graphical abstract

    Hybrid magnetic microreactor: Poly-L-lysine (PLL) was used to facilitate the fabrication of a magnetically separable microcapsule catalyst that accommodates Pd nanoparticles (NPs) as active catalyst, citrate-functionalized Fe3O4 NPs as magnetic component for easy catalyst recovery, and silica NPs to impart stability and selectivity to the catalyst (see figure).

  4. Vanadium Speciation by XANES Spectroscopy: A Three-Dimensional Approach

    Dr. Aviva Levina, Andrew I. McLeod and Prof. Dr. Peter A. Lay

    Article first published online: 1 AUG 2014 | DOI: 10.1002/chem.201403993

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    Separation according to oxidation state (VV, VIV and VIII) and coordination number (4, 5 or 6) has been achieved for a series of 23 well-characterised V species with biological or biomimetic ligands, using three-dimensional plots (see figure) of pre-edge peak intensity versus pre-edge peak position versus edge energy (or white line intensity). These correlations were used to re-analyse the published XANES data for a VV-containing bromoperoxidase.

  5. Biocatalytic Photosynthesis with Water as an Electron Donor

    Dr. Jungki Ryu, Dong Heon Nam, Dr. Sahng Ha Lee and Prof.Dr. Chan Beum Park

    Article first published online: 1 AUG 2014 | DOI: 10.1002/chem.201403301

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    Photocatalytic water splitting was successfully coupled with redox biocatalysis to produce chiral compounds by using tetracobalt polyoxometalate as a hole scavenger and a Rh-based organometallic compound as an electron scavenger for photoexcited [Ru(bpy)3]2+ (see figure).