A facile synthetic method involving SNAr coupling of 4-fluoronitrobenzene to arylamines, followed by reduction of the nitro groups, has been developed. The method allows the preparation of symmetric (NH2/NH2 end-capped) and asymmetric (Ph/NH2 end-capped) oligoanilines of even or odd chain lengths. The preparation of the NH2/NH2 end-capped trimer to octamer and Ph/NH2 end-capped trimer to pentamer is described. The effect of the chain length on the spectroscopic properties of the oxidized oligomers has been investigated by UV-Vis-NIR spectroscopy.
Amino Surface-Functionalized Tris(calix[4]arene) Dendrons with Rigid C3-Symmetric Propeller Cores
作者:Giuseppe Gattuso、Giulia Grasso、Nino Marino、Anna Notti、Andrea Pappalardo、Sebastiano Pappalardo、Melchiorre F. Parisi
DOI:10.1002/ejoc.201100812
日期:2011.10
Dendrons composed of three functionalized cone calix[4]arene substructures covalently bound to rigidC3-symmetric tris-anilino cores through amide linkages have been obtained by a divergent synthetic protocol involving the coupling of p-nitrocalix[4]arene butanoic acid 9 with tris(4-aminophenyl)amine (TAPA), 1,3,5-tris(4-aminophenyl)benzene (TAPB), and 2,4,6-tris(4-aminophenyl)-s-triazine (TAPT). Two
Surface immobilized azomethine for multiple component exchange
作者:Michael Lerond、Daniel Bélanger、W. G. Skene
DOI:10.1039/c7sm01456b
日期:——
Diazonium chemistry concomitant within situelectrochemical reduction was used to graft an aryl aldehyde to indium-tin oxide (ITO) coated glass substrates for subsequent azomethine formation, hydrolysis, and component exchange with different arylamines.
Healable Supramolecular Polymers as Organic Metals
作者:Joseph J. Armao、Mounir Maaloum、Thomas Ellis、Gad Fuks、Michel Rawiso、Emilie Moulin、Nicolas Giuseppone
DOI:10.1021/ja5044006
日期:2014.8.13
Organic materials exhibiting metallic behavior are promising for numerous applications ranging from printed nanocircuits to large area electronics. However, the optimization of electronic conduction in organic metals such as charge-transfer salts or doped conjugated polymers requires high crystallinity, which is detrimental to their processability. To overcome this problem, the combination of the electronic properties of metal-like materials with the mechanical properties of soft self-assembled systems is attractive but necessitates the absence of structural defects in a regular lattice. Here we describe a one-dimensional supramolecular polymer in which photoinduced through-space charge-transfer complexes lead to highly coherent domains with delocalized electronic states displaying metallic behavior. We also reveal that diffusion of supramolecular polarons in the nanowires repairs structural defects thereby improving their conduction. The ability to access metallic properties from mendable self-assemblies extends the current understanding of both fields and opens a wide range of processing techniques for applications in organic electronics.