72433-69-3Relevant articles and documents
Heterogeneous viologen catalysts for metal-free and selective oxidations
Hou, Shengtai,Chen, Nanqing,Zhang, Pengfei,Dai, Sheng
, p. 1455 - 1460 (2019)
Metal-free oxidation, a green chemistry process, has drawn significant attention from catalysis researchers. However, most oxidation processes are completed by homogeneous metal-free catalysts, whereas heterogeneous metal-free materials have been developed with limited successes. In this study, polymerized ionic networks (PINs) with N,N′-dialkyl-4,4′-bipyridinium units as heterogeneous viologen type of catalysts exhibited high efficiency in the oxidation of aromatic sulfides/alcohols to sulfoxides/aldehydes, respectively (conversion: >90%, selectivity: >95%). The catalytic performance of PINs originates from the electron-accepting ability of the viologen unit, which can reduce H2O2 into an active species. Especially, the synthesis of PIN catalysts is a one-step simple polymerization reaction between benzyl bromide and bipyridine in air. The metal-free heterogeneous feature, high selectivity, mild conditions (60 °C, 1 h), and the facile preparation of the catalyst make the current selective oxidation approach attractive.
Electrochemical saccharide recognition by a phenylboronic acid-terminated redox active self-assembled monolayer on a gold electrode
Murakami, Hiroto,Akiyoshi, Hiromi,Wakamatsu, Takanari,Sagara, Takamasa,Nakashima, Naotoshi
, p. 940 - 941 (2000)
Phenylboronic acid-terminated viologen-carrying alkyl disulfide (1) and a reference compound 2 were designed and synthesized. Self-assembled monolayers of 1 on gold electrodes were found to function as a highly sensitive saccharide sensor in aqueous solut
Microwave-assisted synthesis of symmetric and asymmetric viologens
Lamberto, Massimiliano,Rastede, Elizabeth E.,Decker, Justyne,Raymo, Franisco M.
scheme or table, p. 5618 - 5620 (2010/10/21)
Viologens are generally synthesized by N-alkylating 4,4′-bipyridine with alkyl halides. Under conventional heating conditions, however, their synthesis suffers from long reaction times and, often, low yields. In this work, symmetric and asymmetric viologe
