Results 141 to 150 of about 5,308 (247)

Functionalization and Metal Ion Encapsulation Within a Triaxial Supramolecular Weave

Angewandte Chemie, EarlyView.
The functionalization of a triaxially woven supramolecular weave was achieved. Pre‐assembly modification of the peptide‐perylene monoimide building block enabled facile and homogeneous introduction of acetyl, pivaloyl and thiophene moieties throughout the assembly without disrupting the woven structure.
Andreas Herdlitschka, Tatiana Da Silva‐Ferreira, Joseph F. Woods, Man Him Chak, Elisabeth Engelsberger, Bartosz Lewandowski, Helma Wennemers   +6 more
wiley   +2 more sources

Nahinfrarot‐Photoschalten durch direkte Anregung—die nächste Herausforderung

Angewandte Chemie, EarlyView.
Molekulare Photoschalter können endlich direkt mit Licht aus dem Nahinfrarotbereich angeregt werden. Dieser Kurzaufsatz fasst den derzeitigen Entwicklungsstand, die Designprinzipien für niedrigenergetische Lichtresponsivität und die dadurch möglichen außergewöhnlichen Anwendungen zusammen.
Diptiprava Sahoo, Elias Ciekalski, Henry Dube   +2 more
wiley   +1 more source

One‐Step Access to Ultra‐Bright Macrocyclic Oligo‐BODIPYs Featuring Long‐Lived Cyclic Excitons

Angewandte Chemie, EarlyView.
Strong Fluorescence Meets Long Lifetimes: A template‐free, one‐step synthesis affords a series of methylene‐bridged macrocyclic oligo‐BODIPYs combining strong fluorescence with exceptionally long fluorescence lifetimes. Steady‐state and time‐resolved optical spectroscopy reveal unique excitonic coupling conditions and unusual size‐dependent ...
Lukas J. Patalag, Atanu Patra, Mike Pauls, Roland Wilcken, Yuriy Kononevich, Nils van Staalduinen, Peter G. Jones, Andreas Steffen, Thorben Cordes, Christoph Bannwarth, Daniel B. Werz   +10 more
wiley   +2 more sources

Light‐Driven Out‐of‐Equilibrium Helicity Control in a Diarylethene–Helicene Photosystem

Angewandte Chemie, EarlyView.
Distinct energy landscapes of different helicities in the open and closed states of a diarylethene–helicene photoswitch enable a light‐driven energy ratchet. Helix inversion occurs selectively in the closed form, and the resulting helicity is transferred and kinetically trapped upon ring opening, generating a persistent out‐of‐equilibrium chiral state ...
Eric Sidler, Jinghao Wang, Christina Vallina, Ben L. Feringa   +3 more
wiley   +1 more source

Revue sur les analogies et les différences relevées entre un cône de houblon et une baie de raisin : arômes soufrés et azotés

Biotechnologie, Agronomie, Société et Environnement, 2017
Similarities and differences between hop cones and grape berries: sulfur and nitrogen aromas. A review. Introduction. Similarities can be found between the flavors of hop cones and grapes.
Kankolongo Cibaka, ML., Gros, J., Collin, S.   +2 more
doaj  

Gold Single‐Atom Catalysts Enable Selective Shuttle Hydrochlorination of Alkynes

Angewandte Chemie International Edition, EarlyView.
Gold single‐atom catalysts on activated carbon enable heterogeneous shuttle hydrochlorination of terminal alkynes to vinyl chlorides with high chemo‐ and stereo‐selectivity thanks to cooperation between Au(I) sites and the support. The catalytic system combines broad substrate compatibility, simplified separation, and recoverability, paving the way for
Marc‐Eduard Usteri, Eva J. Meeus, Christian Zachau, Seung‐Eun Choi, Aram Bugaev, Milivoj Plodinec, Sharon Mitchell, Bill Morandi, Javier Pérez‐Ramírez   +8 more
wiley   +1 more source

Near Infrared Photoswitching by Direct Excitation—A Next Frontier

Angewandte Chemie International Edition, EarlyView.
Molecular photoswitches finally enter the spectral realm of near‐infrared for their direct excitation. This minireview summarizes the current state‐of‐the‐art, the design principles for achieving such low‐energy light responsiveness, and the unique applications that are unlocked by it.
Diptiprava Sahoo, Elias Ciekalski, Henry Dube   +2 more
wiley   +1 more source

Electrochromic properties of 'Trimeric' thiophene-pyrrole-thiophene

, 2008
A centrosymmetric polymer precursor, namely 6-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)hexan-1-amine (TPHA), was synthesized via a Knorr-Paal reaction using 1,4-di(2-thienyl)-1,4-butanedione and hexane-1,6-diamine. The resultant monomer was characterized by Nuclear Magnetic Resonance (H-1-NMR).
Tarkuc, S, Ak, M, Onurhan, E, Toppare, L
openaire   +1 more source

Aza‐Büchner–Curtius–Schlotterbeck Reaction Enables Selective Construction of Quaternary Carbon Centers

Angewandte Chemie International Edition, EarlyView.
We introduce the Aza‐Büchner–Curtius–Schlotterbeck (ABCS) reaction: A mild, catalyst‐free method for homologating aryl imines. Diverging from the traditional BCS mechanism, the diazo intermediate undergoes selective C─C insertion to form an all‐carbon quaternary center.
Simon O. Angerer, Vincent George, Aryaman Pattanik, Gaia Carpentiero, Tereza Morcinková, Julia Rehbein, Burkhard König   +6 more
wiley   +1 more source

Low‐Threshold Red Lasing in Diketopyrrolopyrrole‐Based Organic Semiconductor Films

Angewandte Chemie International Edition, EarlyView.
Low‐threshold organic semiconductor lasers (OSLs) in the red region are achieved using diketopyrrolopyrrole (DPP) derivatives (DPA‐DPPMe and HMAT‐d‐DPP). Molecular design enables precise control of radiative‐decay and molecular orientation, suppressing optical losses and enhancing gain.
Youhei Chitose, Ryota Zenke, Takuma Saeki, Hsin‐Yi Wei, Rahul Murali, Shota Fukuma, Yusei Kaya, Gomathi Vinayakam Mageswari, Sai Santosh Kumar Raavi, Ja‐Hon Lin, Tzu‐Chau Lin, Chihaya Adachi   +11 more
wiley   +1 more source