A tetrathiafulvalene–perylene diimide conjugate prepared via click chemistry
摘要:
A new tetrathiafulvalene (TTF)-perylene diimide (PDI) conjugate is prepared from an azide-functionalized TTF and an acetylenic PDI employing a Cu(I)-catalyzed Huisgen-Meldal-Sharpless reaction ('click chemistry'). Thus, the TTF donor and PDI acceptor units are linked together by a 1,2,3-triazole unit. The molecules are found to assemble on a mica surface, forming fibrilar structures. (C) 2009 Elsevier Ltd. All rights reserved.
Newpenta(organo)fullerene donor–acceptor systems bearing five recognition units have been prepared in order to promote their self‐assembly in solution and in the solid state. The host cavity formed due to the perfect organization of electro‐ and/or photoactive substituents around the fullerene, together with π–π and electronic interactions, leads to a supramolecular arrangement similar to shuttlecocks
Two tetrathiafulvalene-calix[4]arene assemblies (TTF-calix-1 and TTF-calix-2) have been synthesized by the click reaction. Both their cyclic voltammograms show, as expected, two one-electron quasi-reversible redox behavior. The UV-vis absorption spectra studies show that these two assemblies undergo progressive oxidation at the TTF moiety in presence of increasing amounts of Cu2+ or Hg2+. Moreover, the absorption studies show intermolecular electron transfer between compounds TTF-calix-1 or TTF-calix-2 and p-chloranil may be promoted by specific metal ions such as Pb2+, Sc3+ etc. (c) 2013 Bang-Tun Zhao and Wei-Min Zhu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Metal-Promoted Intermolecular Electron Transfer in Tetrathiafulvalene–Thiacalix[4]arene Conjugates and Tetrachlorobenzoquinone
In this work, two series of tetrathiafulvalene (TTF) and thiacalix[4]arene (TCA) conjugates (TTFTCA) were designed by CuAAC click reactions. The results obtained from NMR and H-1 NMR NOE indicated that their conformations of thiacalix[4]arene framework may prefer to 1,3-alternate. The cyclic voltammograms of four TTFTCA compounds containing electroactive TTF units were provided. Meanwhile, their intermolecular electron-transfer (ET) behaviors with tetrachlorobenzoquinone (Q) mediated by different metal ions, Sc3+, Pb2+, Ag+, Cd2+, and Zn2+, in CH3CNCH2Cl2 (V/V = 1:1) solution were studied and analyzed via UVvis spectroscopy. It was determined that intermolecular ET between each TTFTCA and Q ensemble was not observed without introduction of the metal ions mentioned above. The added specified metal ions most likely induced the intermolecular ET between TTFTCA and Q ensemble, and the effects of Sc3+ functions were the most imperative. The intermolecular ET also proved to be reliant on the structure of TTFTCA, where TTFTCA 7a and 7b were more effective than TTFTCA 6a and 6b. The difference may be credited to TTFTCA 7a or 7b possessing two independent TTF pendants and providing a more synergic coordination among the TTF radical cation and Q radical anion with a metal ion.
New Penta(tetrathiafulvalenyl)[60]fullerenes for Supramolecular Materials
Newpenta(organo)fullerenes donor–acceptor systems bearing five tetrathiafulvalene recognition units have been synthesized to promote self‐assemblies similar in appearance to shuttlecocks nested into each other thanks to the conical host cavity created around the fullerene together with the π–π and electronic interactions.
A new tetrathiafulvalene (TTF)-perylene diimide (PDI) conjugate is prepared from an azide-functionalized TTF and an acetylenic PDI employing a Cu(I)-catalyzed Huisgen-Meldal-Sharpless reaction ('click chemistry'). Thus, the TTF donor and PDI acceptor units are linked together by a 1,2,3-triazole unit. The molecules are found to assemble on a mica surface, forming fibrilar structures. (C) 2009 Elsevier Ltd. All rights reserved.