A new monolayer platform based on pyrylium has been developed which is reactive towards amine-terminated (bio)molecules. Upon reaction, a switch in fluorescence properties of the monolayer signifies successful immobilization of these molecules.
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http://dx.doi.org/10.1039/c002203a | DOI Listing |
Chempluschem
December 2020
Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany.
Tetrabromo aromatics can be synthesized by the Fischer-Zimmermann condensation of appropriate pyrylium salts with arylene dicarboxylic acid salts. Their cyclization by intramolecular Yamamoto coupling yields strained bicyclophanes with adjustable sizes and different intraannular bridges. All compounds adsorb at the solid/liquid interface on highly oriented pyrolytic graphite (HOPG) and are investigated by scanning tunneling microscopy (STM) with submolecular resolution.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
March 2020
Institute for Polymers, ETH Zürich, Vladimir-Prelog-Weg 5, 8093, Zürich, Switzerland.
2D polymer sheets with six positively charged pyrylium groups at each pore edge in a stacked single crystal can be transformed into a 2D polymer with six pyridines per pore by exposure to gaseous ammonia. This reaction furnishes still a crystalline material with tunable protonation degree at regular nano-sized pores promising as separation membrane. The exfoliation is compared for both 2D polymers with the latter being superior.
View Article and Find Full Text PDFChem Commun (Camb)
June 2010
Molecular Nanofabrication Group, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands.
A new monolayer platform based on pyrylium has been developed which is reactive towards amine-terminated (bio)molecules. Upon reaction, a switch in fluorescence properties of the monolayer signifies successful immobilization of these molecules.
View Article and Find Full Text PDFPhys Chem Chem Phys
August 2009
Institut Universitaire Romand de Santé au Travail (IST), Université de Lausanne et Université de Genève, CH-1011 Lausanne, Switzerland.
Six gases [N(CH(3))(3), NH(2)OH, CF(3)COOH, HCl, NO(2) and O(3)] were selected to probe the surface of seven different types of combustion aerosol samples (amorphous carbon, flame soot) and three types of TiO(2) nanoparticles using heterogeneous, i.e. gas-surface reactions.
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