Chemistry - A European Journal

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Rhodium(III)‐ and Iridium(III)‐Catalyzed C7 Alkylation of Indolines with Diazo Compounds
Chemistry - A European Journal - Tập 20 Số 52 - Trang 17653-17657 - 2014
Wen Ai, Xueyan Yang, Yunxiang Wu, Xuan Wang, Yuanchao Li, Yaxi Yang, Bing Zhou
AbstractA RhIII‐catalyzed procedure for the C7‐selective CH alkylation of various indolines with α‐diazo compounds at room temperature is reported. The advantages of this process are: 1) simple, mild, and pH‐neutral reaction conditions, 2) broad substrate scope, 3) complete regioselectivity, 4) no need for an external oxidant, and 5) N... hiện toàn bộ
A Polyoxometalate‐Encapsulating Cationic Metal–Organic Framework as a Heterogeneous Catalyst for Desulfurization
Chemistry - A European Journal - Tập 21 Số 9 - Trang 3778-3784 - 2015
Xiuli Hao, Yuan‐Yuan Ma, Hong‐Ying Zang, Li Wang, Yangguang Li, Enbo Wang
AbstractA new cationic triazole‐based metal–organic framework encapsulating Keggin‐type polyoxometalates, with the molecular formula [Co(BBPTZ)3][HPMo12O40]⋅24 H2O [compound 1; BBPTZ=4,4′‐bis(1,2,4‐triazol‐1‐ylmethyl)biphenyl] is hydrothermally synthesized and...... hiện toàn bộ
Fluorescent Sulphur‐ and Nitrogen‐Containing Porous Polymers with Tuneable Donor–Acceptor Domains for Light‐Driven Hydrogen Evolution
Chemistry - A European Journal - Tập 24 Số 46 - Trang 11916-11921 - 2018
Dana Schwarz, Amitava Acharja, Arun Ichangi, Pengbo Lyu, Maksym Opanasenko, Fabian R. Goßler, Tobias A. F. König, Jiřı́ Čejka, Petr Nachtigall, Arne Thomas, Michael J. Bojdys
AbstractLight‐driven water splitting is a potential source of abundant, clean energy, yet efficient charge‐separation and size and position of the bandgap in heterogeneous photocatalysts are challenging to predict and design. Synthetic attempts to tune the bandgap of polymer photocatalysts classically rely on variations of the sizes of their π‐conjugated domains. H...... hiện toàn bộ
Tailored Band Gaps in Sulfur‐ and Nitrogen‐Containing Porous Donor–Acceptor Polymers
Chemistry - A European Journal - Tập 23 Số 53 - Trang 13023-13027 - 2017
Dana Schwarz, Yaroslav S. Kochergin, Amitava Acharjya, Arun Ichangi, Maksym Opanasenko, Jiřı́ Čejka, Uwe Lappan, Pál Árki, Junjie He, Johannes Schmidt, Petr Nachtigall, Arne Thomas, Ján Tarábek, Michael J. Bojdys
AbstractDonor–acceptor dyads hold the key to tuning of electrochemical properties and enhanced mobility of charge carriers, yet their incorporation into a heterogeneous polymer network proves difficulty owing to the fundamentally different chemistry of the donor and acceptor subunits. A family of sulfur‐ and nitrogen‐containing porous polymers (SNPs) are obtained v...... hiện toàn bộ
Supramolecular Structure, Physical Properties, and Langmuir‐Blodgett Film Formation of an Optically Active Liquid‐Crystalline Phthalocyanine
Chemistry - A European Journal - Tập 1 Số 3 - Trang 171-182 - 1995
Cornelus F. van Nostrum, Anton W. Bosman, Gerwin H. Gelinck, Pieter G. Schouten, John M. Warman, Arno P. M. Kentgens, Marinus A. C. Devillers, Andries Meijerink, Stephen J. Picken, Ulrich Sohling, A. Schouten, Roeland J. M. Nolte
AbstractThe structure and physical properties of optically active, metal‐free 2,3,9,10,16,17,23,24‐octa (S‐3,7‐dimethyloctoxy)phthalocyanine ((S)‐Pc(8,2)) are reported and compared with those of the phthalocyanine with (R,S) side chains (mixture of 43 stereoi...... hiện toàn bộ
Photochemical Transformations Accelerated in Continuous‐Flow Reactors: Basic Concepts and Applications
Chemistry - A European Journal - Tập 20 Số 34 - Trang 10562-10589 - 2014
Yuanhai Su, Natan J. W. Straathof, Volker Hessel, Timothy Noël
AbstractContinuous‐flow photochemistry is used increasingly by researchers in academia and industry to facilitate photochemical processes and their subsequent scale‐up. However, without detailed knowledge concerning the engineering aspects of photochemistry, it can be quite challenging to develop a suitable photochemical microreactor for a given reaction. In this r...... hiện toàn bộ
TEMPO/HCl/NaNO2 Catalyst: A Transition‐Metal‐Free Approach to Efficient Aerobic Oxidation of Alcohols to Aldehydes and Ketones Under Mild Conditions
Chemistry - A European Journal - Tập 14 Số 9 - Trang 2679-2685 - 2008
Xinliang Wang, Renhua Liu, Jin Yu, Xinmiao Liang
AbstractHydrochloric acid, a very inexpensive and readily available inorganic acid, has been found to cooperate exquisitely with NaNO2/TEMPO in catalyzing the molecular‐oxygen‐driven oxidation of a broad range of alcohol substrates to the corresponding aldehydes and ketones. This transition‐metal‐free catalytic oxidative conversion is novel and...... hiện toàn bộ
Making a Long Journey Short: Alkyne Functionalization of Natural Product Scaffolds
Chemistry - A European Journal - Tập 22 Số 14 - Trang 4666-4678 - 2016
Johannes Lehmann, Megan H. Wright, Stephan A. Sieber
AbstractBiological selection makes natural products promising scaffolds for drug development and the ever growing number of newly identified, structurally diverse molecules helps to fill the gaps in chemical space. Elucidating the function of a small molecule, such as identifying its protein binding partners, its on‐ and off‐targets, is becoming increasingly import...... hiện toàn bộ
Palladium Nanoclusters Supported on Propylurea‐Modified Siliceous Mesocellular Foam for Coupling and Hydrogenation Reactions
Chemistry - A European Journal - Tập 14 Số 10 - Trang 3118-3125 - 2008
Nandanan Erathodiyil, Samuel Ooi, Abdul Majeed Seayad, Yu Han, Su Seong Lee, Jackie Y. Ying
AbstractThis paper describes the synthesis, characterization and applications of palladium (Pd) nanoparticles supported on siliceous mesocellular foam (MCF). Pd nanoparticles of 2–3 nm and 4–6 nm were used in reactions involving molecular hydrogen (such as hydrogenation of double bonds and reductive amination), transfer hydrogenation of ketones and epoxides, and co...... hiện toàn bộ
Mesoporous Au/TiO2 Nanocomposite Microspheres for Visible‐Light Photocatalysis
Chemistry - A European Journal - Tập 18 Số 17 - Trang 5361-5366 - 2012
Guannan Wang, Xiaofei Wang, Junfeng Liu, Xiaoming Sun
AbstractMesoporous Au/TiO2 nanocomposite microspheres have been synthesized by using a microemulsion‐based bottom‐up self‐assembly (EBS) process starting from monodisperse gold and titania nanocrystals as building blocks. The microspheres had large surface areas (above 270 m2 g−1) and open mesopores (ab...... hiện toàn bộ
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