Modular synthesis, spectroscopic characterization and in situ functionalization using “click” chemistry of azide terminated amide containing self-assembled monolayers
A general and modular synthetic route is developed for the synthesis of azidoalkylthiol molecules, which contain an amide functional group, from common and easily available precursors. SAMs (self-assembledmonolayers) formed by these amide containing azidoalkylthiols are characterised by attenuated total reflectance FTIR spectroscopy, X-ray photoelectron spectroscopy, contact angle goniometry and surface
Iron(II)-Catalyzed Site-Selective Functionalization of Unactivated C(sp<sup>3</sup>
)−H Bonds Guided by Alkoxyl Radicals
作者:Honghao Guan、Shutao Sun、Ying Mao、Lei Chen、Ran Lu、Jiancheng Huang、Lei Liu
DOI:10.1002/anie.201806434
日期:2018.8.27
for site‐selectivefunctionalization of unactivated methylene and methine C−H bonds enabled by an FeII‐catalyzed redox process is described. The mild, expeditious, and modular protocol allows efficient remote aliphatic fluorination, chlorination, amination, and alkynylation of structurally and electronically varied primary, secondary, and tertiary hydroperoxides with excellent functional‐group tolerance
polyisoprene, polystyrene, and goldnanoparticle were prepared by multistep "grafting-to" method coupled with alkyne-azide click reaction. The polymer composition can be controlled by the feed ratio of goldnanoparticle to azide ligands. The goldnanoparticle hybrid with symmetric polymer composition forms an "alternating lamellar" structure of polyisoprene and polystyrene, where the goldnanoparticles were
A versatile synthetic strategy for nanoporous gold–organic hybrid materials for electrochemistry and photocatalysis
作者:Andre Wichmann、Günter Schnurpfeil、Jana Backenköhler、Lena Kolke、Vladimir A. Azov、Dieter Wöhrle、Marcus Bäumer、Arne Wittstock
DOI:10.1016/j.tet.2014.03.091
日期:2014.9
Nanoporous gold (npAu) was employed as high surface area substrate for immobilization of redox- and photooxidative-active organic molecules. A two-step synthetic routine is demonstrated as a versatile and robust method for immobilization of various molecules. First, self-assembled monolayers (SAMs) of thiols containing an azide moiety were prepared on npAu substrates. Then, alkyne-modified ferrocene, tetrathiafulvalene, and zinc(II)phthalocyanine derivatives were covalently bound via the click reaction to this linker. Following the provided synthetic procedures high performance composite materials are generated for electrochemistry and photochemistry. The robust bonding between the organic functional group and the gold support provides stability even under strongly oxidizing conditions (applied potential or singlet oxygen). (C) 2014 Elsevier Ltd. All rights reserved.