Results 51 to 60 of about 16,123 (194)

Photocatalytic nucleophilic addition of alcohols to styrenes in Markovnikov and anti-Markovnikov orientation

Beilstein Journal of Organic Chemistry, 2015
The nucleophilic addition of methanol and other alcohols to 1,1-diphenylethylene (1) and styrene (6) into the Markovnikov- and anti-Markovnikov-type products was selectively achieved with 1-(N,N-dimethylamino)pyrene (Py) and 1,7-dicyanoperylene-3,4:9,10 ...
Martin Weiser, Sergej Hermann, Alexander Penner, Hans-Achim Wagenknecht   +3 more
doaj   +1 more source

End-to-End Bent Perylene Bisimide Cyclophanes by Double Sulfur Extrusion

Journal of the American Chemical Society
Bending inherently planar π-cores consisting of only six-membered rings has traditionally been challenging because a powerful transformation is required to compensate for the significant strain energy associated with bending.
Yuki Tanaka, Keita Tajima, Ryota Kusumoto, Yasuhiro Kobori, N. Fukui, Hiroshi Shinokubo   +5 more
semanticscholar   +1 more source

Isodesmic Supramolecular Assembly of Phenylethynylene Bis‐Urea Macrocycles

Chemistry – A European Journal, EarlyView.
A soluble phenylethynylene bis‐urea macrocycle assembles in polar media via an isodesmic hydrogen bonded mechanism. Spectroscopic and morphological studies reveal nanoscale aggregates with short chain length, while guest additives modulate enthalpy and polymerization, demonstrating tunable supramolecular assembly.
Fahidat A. Gbadamosi, Kazi Md Zubaer, Vaibhavi A. Samant, Jillian Eubanks, Sophya Garashchuk, Linda S. Shimizu   +5 more
wiley   +1 more source

Energy Transfer in Calixarene-Based Cofacial-Positioned Perylene Bisimide Arrays

, 2016
The synthesis of multichromophoric perylene bisimide-calix[4]arene arrays with up to five perylene units (containing orange, violet, and green perylene bisimide chromophores) and of monochromophoric model compounds was achieved by subsequent imidization ...
Myroslav O. Vysotsky (2642425), Volker Böhmer (2458561), Felix Schlosser (1331820), Catharina Hippius (1842715), Frank Würthner (2442820)   +4 more
core   +1 more source

On the Planarity of Heterocyclic Bay‐Substituted Perylenediimides: Insight into the Fluorescent Photoinduced Electron Transfer Sensing Framework

European Journal of Organic Chemistry, EarlyView.
Near‐infrared fluorescent pH indicators based on perylenediimide were constructed in a modular receptor–spacer–fluorophore–spacer–receptor format with heterocyclic amino moieties at the bay positions. Counterintuitively, the dibrominated intermediate with two heavy atoms is more emissive than the heterocyclic compounds.
Luke Camenzuli, Davide Benedetto Tiz, Nicola’ Agius, Konrad Szaciłowski, David C. Magri   +4 more
wiley   +1 more source

Photoinduced Processes in Self-Assembled Porphyrin/Perylene Bisimide Metallosupramolecular Boxes

, 2016
Two new supramolecular boxes, (ZnMC)2(rPBI)2 and (ZnMC)2(gPBI)2, have been obtained by axial coordination of N,N′-dipyridyl-functionalized perylene bisimide (PBI) dyes to the zinc ion centers of two 2+2 porphyrin metallacycles (ZnMC = [trans,cis,cis ...
M. Teresa Indelli (1980124), Claudio Chiorboli (1678201), Elisabetta Iengo (1694944), Franco Scandola (1678204), Frank Würthner (1293753), Peter Osswald (2190187)   +5 more
core   +1 more source

'Invisible' Molecular Dynamics Revealed for a Conformationally Chiral π-Stacked Perylene Bisimide Foldamer.

Angewandte Chemie
Whilst energetic and kinetic aspects of folding processes are meanwhile well understood for natural biomacromolecules, the folding dynamics in so far studied artificial foldamer counterparts remain largely unexplored.
Ben Teichmann, M. Sárosi, Kazutaka Shoyama, M. A. Niyas, R. K. Dubey, F. Würthner   +5 more
semanticscholar   +1 more source

Distance Matters: Biasing Mechanism, Transfer of Asymmetry, and Stereomutation in N-Annulated Perylene Bisimide Supramolecular Polymers

Journal of the American Chemical Society, 2021
The synthesis of two series of N-annulated perylene bisimides (PBIs), compounds 1 and 2, is reported, and their self-assembling features are thoroughly investigated by a complete set of spectroscopic measurements and theoretical calculations.
Manuel A Martínez, Azahara Doncel-Giménez, Jesús Cerdá, J. Calbo, Rafael Rodríguez, J. Aragó, J. Crassous, E. Ortí, L. Sánchez   +8 more
semanticscholar   +1 more source

Long Versus Short Chain Covalent Functionalization in the Preparation of Mechanochromic Polymers

Chemistry–Methods, Volume 6, Issue 5, May 2026.
A perylene bisimide (PBI) macromechanophore featuring poly(ε‐caprolactone) (PCL) spacers was covalently incorporated into poly(styrene‐ethylene‐butylene‐styrene) (SEBS) and low‐density polyethylene (LLDPE) matrices. Compared to a short‐spacer PBI, the long‐spacer enhanced force transduction while preserving mechanical properties.
B. Bertoncini, S. Gabellini, C. Adamo, A. Pucci, S. Scurti, M. Carlotti   +5 more
wiley   +1 more source

Photoinduced Processes in Self-Assembled Porphyrin/Perylene Bisimide Metallosupramolecular Boxes

, 2010
Two new supramolecular boxes, (ZnMC)2(rPBI)2 and (ZnMC)2(gPBI)2, have been obtained by axial coordination of N,N′-dipyridyl-functionalized perylene bisimide (PBI) dyes to the zinc ion centers of two 2+2 porphyrin metallacycles (ZnMC ) [trans,cis,cis ...
SCANDOLA, Franco, M. Teresa Indelli, F. Würthner, P. Osswald, CHIORBOLI, Claudio, Elisabetta Iengo, Franco Scandola, Peter Osswald, Claudio Chiorboli, INDELLI, Maria Teresa, E. Iengo, Frank Würthner   +11 more
core   +1 more source