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Patterned Assembly of Quantum Dots onto Surfaces Modified with Click Microcontact Printing
Gassensmith, Jeremiah J.,Erne, Petra M.,Paxton, Walter F.,Frasconi, Marco,Donakowski, Martin D.,Stoddart, J. Fraser WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.2
<P><B>The self‐assembly of CdSe quantum dots (QDs) onto a patterned silica surface</B> generated from surface microcontact click printing is presented. The mechanically robust self‐assembly process produces patterns of QDs which remain steadfast, even as subsequent reactions are performed on the substrate, demonstrating the utility and ease of this self‐assembly process.</P>
A Radically Configurable Six-State Compound
Barnes, J. C.,Fahrenbach, A. C.,Cao, D.,Dyar, S. M.,Frasconi, M.,Giesener, M. A.,Benitez, D.,Tkatchouk, E.,Chernyashevskyy, O.,Shin, W. H.,Li, H.,Sampath, S.,Stern, C. L.,Sarjeant, A. A.,Hartlieb, K. American Association for the Advancement of Scienc 2013 Science Vol.339 No.6118
<P>Most organic radicals possess short lifetimes and quickly undergo dimerization or oxidation. Here, we report on the synthesis by radical templation of a class of air- and water-stable organic radicals, trapped within a homo[2]catenane composed of two rigid and fixed cyclobis(paraquat-p-phenylene) rings. The highly energetic octacationic homo[2]catenane, which is capable of accepting up to eight electrons, can be configured reversibly, both chemically and electrochemically, between each one of six experimentally accessible redox states (0, 2+, 4+, 6+, 7+, and 8+) from within the total of nine states evaluated by quantum mechanical methods. All six of the observable redox states have been identified by electrochemical techniques, three (4+, 6+, and 7+) have been characterized by x-ray crystallography, four (4+, 6+, 7+, and 8+) by electron paramagnetic resonance spectroscopy, one (7+) by superconducting quantum interference device magnetometry, and one (8+) by nuclear magnetic resonance spectroscopy.</P>
A Neutral Naphthalene Diimide [2]Rotaxane
Jacquot de Rouville, Henri-Pierre,Iehl, Julien,Bruns, Carson J.,McGrier, Psaras L.,Frasconi, Marco,Sarjeant, Amy A.,Stoddart, J. Fraser American Chemical Society 2012 ORGANIC LETTERS Vol.14 No.20
<P>A neutral donor–acceptor [2]rotaxane, which has been synthesized using click chemistry, has had its solid-state structure and superstructure elucidated by X-ray crystallography. Both dynamic <SUP>1</SUP>H NMR spectroscopy and electrochemical investigations have been employed in an attempt to shed light on both geometrical reorganization and redox-switching processes that are occurring or can be induced within the [2]rotaxane.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/orlef7/2012/orlef7.2012.14.issue-20/ol3022963/production/images/medium/ol-2012-022963_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ol3022963'>ACS Electronic Supporting Info</A></P>
Stimulated Release of Size‐Selected Cargos in Succession from Mesoporous Silica Nanoparticles
Wang, Cheng,Li, Zongxi,Cao, Dennis,Zhao, Yan‐,Li,Gaines, Justin W.,Bozdemir, O. Altan,Ambrogio, Michael W.,Frasconi, Marco,Botros, Youssry Y.,Zink, Jeffrey I.,Stoddart, J. Fraser WILEY‐VCH Verlag 2012 Angewandte Chemie Vol.124 No.22
<P><B>Zwei Fliegen mit einer Klappe</B>: Die kovalente Bindung von β‐Cyclodextrin (gelb; siehe Bild) an mesoporöse Siliciumdioxid‐Nanopartikel (MSNs) ergibt ein duales Freisetzungssystem, das mit unterschiedlich großen Wirkstoffen (blaue und rote Kugeln) beladen werden kann, die sich auf verschiedene Stimuli hin nacheinander freisetzen lassen. Die kleineren Moleküle werden durch Absenken des pH‐Wertes freigesetzt, die größeren nach Abspaltung der Cyclodextrine von der MSN‐Oberfläche.</P>
Oua?ssi, Mehdi,Studer, Anne-Sophie,Mege, Diane,Thuny, Franck,Boiron, Laurence,Loundou, Anderson,Pirr?, Nicolas,Hamed, Samy,Frasconi, Cecilia,Habib, Gilbert,Fournier, Pierre-Edouard,Collart, Fr?deric,S Potamitis Press 2014 Anticancer research Vol.34 No.1
<P>Association between streptococcal endocarditis and gastrointestinal disease has been well-documented in the literature. However oncological impact of this complicated presentation has not yet been reported. We have conducted to our knowledgethe first case-control study on this subject.</P>