Synthesis of Functionalized Azobiphenyl‐ and Azoterphenyl‐ Ditopic Linkers: Modular Building Blocks for Photoresponsive Smart Materials

Autor: Dr. Sylvain Grosjean, Patrick Hodapp, Dr. Zahid Hassan, Prof. Dr. Christof Wöll, Dr. Martin Nieger, Prof. Dr. Stefan Bräse
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: ChemistryOpen, Vol 8, Iss 6, Pp 743-759 (2019)
Druh dokumentu: article
ISSN: 2191-1363
DOI: 10.1002/open.201900031
Popis: Abstract Modular synthesis of structurally diverse functionalized azobiphenyls and azoterphenyls for the realization of optically switchable materials has been described. The corresponding synthesis of azobiphenyls and azoterphenyls by stepwise Mills/Suzuki‐Miyaura cross‐coupling reaction, proceeds with high yields and provides facile access to a library of functionalized building blocks. The synthetic methods described herein allow combining several distinct functional groups within a single unit, each intended for a specific task, such as 1) the −N=N− azobenzene core as a photoswitchable moiety, 2) aryls and heteroaryls, functionalized with carboxylic acids or pyridine at its peripheries, as coordinating moieties and 3) varying substitution, size and length of the backbone for adaptability to specific applications. These specifically designed azobiphenyls and azoterphenyls provide modular bricks, potentially useful for the assembly of a variety of polymers, molecular containers and coordination networks, offering a high degree of molecular functionality. Once integrated into materials, the azobenzene system, as a side group on the organic linker backbone, can be exploited for remotely controlling the structural, mechanical or physical properties, thus being applicable for a broad variety of ‘smart’ applications.
Databáze: Directory of Open Access Journals
Nepřihlášeným uživatelům se plný text nezobrazuje