Portal de Periódicos da CAPES

Cover Picture: Silver Baits for The “Miraculous Draught” of Amphiphilic Lanthanide Helicates / A Multistate Switchable [3]Rotacatenane / Heuristic Chemistry—Addition Reactions / Steric, Electronic, and Secondary Effects on the Coordination Chemistry of Ionic Phosphine Ligands and the Catalytic Behavior of Their Metal Complexes / 4,5‐Disubstituted N , N′ ‐Di‐ tert ‐alkyl Imidazolium Salts: New Synthesis and Structural Features / Luminescent Cyclometalated Dialkynylgold(III) …

2011; Wiley; Volume: 17; Issue: 1 Linguagem: Inglês

10.1002/chem.201090247

1521-3765

Emmanuel Terazzi, Laure Guénée, Johan Varin, B. Bocquet, Jean‐François Lemonnier, Daniel Emery, Jiri Mareda, Claude Piguet, Gökhan Barın, Ali Coşkun, Douglas C. Friedman, Mark A. Olson, Michael T. Colvin, R. Carmielli, Sanjeev K. Dey, Özgür Altan Bozdemir, Michael R. Wasielewski, J. Fraser Stoddart, Nicole Graulich, Henning Hopf, Peter R. Schreiner, Dennis J. M. Snelders, Gerard van Koten, Robertus J. M. Klein Gebbink, Anastasia A. Grishina, Svetlana M. Polyakova, Roman A. Kunetskiy, Ivana Cı́sařová, Ilya M. Lyapkalo, Vonika Ka‐Man Au, Keith Man‐Chung Wong, Nianyong Zhu, Vivian Wing‐Wah Yam, Timothy J. Donohoe, Cedric K. A. Callens, Aída Flores, Adam R. Lacy, Akshat H. Rathi, Manuel N. Chaur, Daniel Collado, Jean‐Marie Lehn,

Chemical Reactions and Isotopes

The International Year of Chemistry 2011…︁ …︁is an initiative of the International Union of Pure and Applied Chemistry (IUPAC) and the United Nations Educational, Scientific, and Cultural Organization (UNESCO). Under the motto “Chemistry—our life, our future”, it is a worldwide celebration of the achievements of chemistry and its contributions to the well-being of humankind. As part of our own contribution to the International Year of Chemistry, the cover of this special issue features a collage of chemistry from around the world. Going clockwise from the top left-hand corner, the work featured is on amphiphilic lanthanide helicates by Claude Piguet, Emmanuel Terazzi, Jiri Mareda et al. (p. 184); on a multistate switchable [3]rotacatenane by J. Fraser Stoddart et al. (p. 213); on heuristic chemistry—addition reactions by Peter Schreiner et al. (p. 30); on steric, electronic, and secondary effects on the coordination chemistry of ionic phosphine ligands and the catalytic behavior of their metal complexes by Robertus J. M. Klein Gebbink et al. (p. 42); on the synthesis and structural features of 4,5-disubstituted N,N′-di-tert-alkyl imidazolium by Svetlana Polyakova, Ilya M. Lyapkalo et al. (p. 96); on luminescent cyclometalated dialkynylgold(III) complexes of 2-phenylpyridine-type derivatives with readily tunable emission properties by Vivian Wing-Wah Yam et al. (p. 130); on recent developments in methodology for the direct oxyamination of olefins by Timothy J. Donohoe et al. (p. 58); and last but by no means least, on configurational and constitutional information storage by Nobel Prize winner, and co-founder of the journal, Jean-Marie Lehn et al. (p. 248). Hydrogenation Reactions In their Minireview on page 14232 ff., M. Diéguez et al. discuss the progress made in the asymmetric hydrogenation of minimally functionalized terminal olefins as a new, alternative, sustainable, and direct strategy for preparing enantioenriched hydrocarbons. Ir/P,N catalytic systems are state of the art in the asymmetric hydrogenation of minimally functionalized terminal olefins. In this respect, the recent introduction of biaryl phosphite moieties into ligand design has led to a major improvement in substrate versatility. Self-Assembly The self-assembly of a properly designed 3D building block exposing a vertically oriented azobenzene when physisorbed on HOPG in its trans form has been investigated by STM. The switching of the monolayer consisting of upright oriented trans-azobenzenes to the corresponding monolayer based on cis-azobenzenes has been triggered by light. For more information see the Communication by S. Hecht, P. Samorì et al. on page 14256 ff. Metal–Organic Frameworks In their Full Paper on page 14296 ff., R. A. Fischer et al. describe the functionalization of well-known rigid metal–organic frameworks, [Zn4O(bdc)3]n and [Zn2(bdc)2(dabco)]n (bdc=1,4-benzene dicarboxylate, dabco=diazabicyclo[2.2.2]octane), with additional alkyl ether groups of the type O(CH2)nOCH3 (n=2–4). This initiates unexpected structural flexibility, as well as very high sorption selectivity towards CO2 over N2 and CH4 in the porous materials.