Syntheses, Redox Properties, Self-Assembled Structures, and Charge-Transfer Complexes of Imidazole- and Benzimidazole-Annelated Tetrathiafulvalene Derivatives
New tetrathiafulvalene (TTF)-type electron-donor molecules annelated with imidazole or benzimidazole moiety were designed and synthesized by the phosphite-mediated coupling reactions of imidazole- ...
Pronounced Electrochemical Amphotericity of a Fused Donor-Acceptor Compound: A Planar Merge of TTF with a TCNQ-Type Bithienoquinoxaline
作者:Xavier Guégano、Alexander L. Kanibolotsky、Carmen Blum、Stijn F. L. Mertens、Shi-Xia Liu、Antonia Neels、Hans Hagemann、Peter J. Skabara、Samuel Leutwyler、Thomas Wandlowski、Andreas Hauser、Silvio Decurtins
DOI:10.1002/chem.200802011
日期:2009.1
Narrowing the gap: A compactly fused π‐conjugated molecule combines a high‐lying HOMO with a low‐lying LUMO (Eox−Ered=0.52 eV) and a fairly low‐lying LUMO+1 on the bridging unit, giving rise to strong optical charge‐transfer transitions. A facile electron transfer has been observed by EPR and NMR spectroscopies.
缩小差距:紧密融合的π共轭分子将高水平的HOMO与低水平的LUMO(E ox - E red = 0.52 eV)和桥接单元上的低水平LUMO + 1结合在一起,产生了强大的光学电荷转移跃迁。通过EPR和NMR光谱学已经观察到了容易的电子转移。
Synthesis of new intramolecular charge transfer A–D–A tetrathiafulvalene-fused triads exhibiting large solvent sensitive emission behavior
作者:Ramababu Bolligarla、Samar K. Das
DOI:10.1016/j.tetlet.2011.03.016
日期:2011.5
We have synthesized three new acceptor–donor–acceptor (A–D–A) triads incorporating the donor tetrathiafulvalene (TTF) fused with acceptors quinoxaline and dipyrido[3,2-a:2′,3′-c]phenazine (dppz) systems. Solution emission spectral studies of all these compounds show large solvent sensitive behavior with huge Stokes shifts. The large solvent dependence of the emission indicates that the excited state
我们已经合成了三个新的受体-供体-受体(AD)三元组,其结合了供体四硫富瓦烯(TTF)与受体喹喔啉和双嘧啶[3,2- a:2',3'- c ]吩嗪(dppz)融合系统。所有这些化合物的溶液发射光谱研究均显示出较大的斯托克斯位移对溶剂的敏感行为。发射的大溶剂依赖性表明,由于分子内电荷转移,激发态在极性更大的溶剂中稳定。我们还描述了一种标题化合物(化合物1b)的电化学研究,该化合物在1.02和1.31 V下相对于Ag / AgCl表现出两种氧化反应,分别对应于TTF单阳离子和离子的氧化物种。
Influence of the Substituents on the Electronic and Electrochemical Properties of a New Square-Planar Nickel-Bis(quinoxaline-6,7-dithiolate) System: Synthesis, Spectroscopy, Electrochemistry, Crystallography, and Theoretical Investigation
作者:Ramababu Bolligarla、Samala Nagaprasad Reddy、Gummadi Durgaprasad、Vudagandla Sreenivasulu、Samar K. Das
DOI:10.1021/ic301017g
日期:2013.1.7
3, and 4 have been characterized unambiguously by single crystalX-ray structural analysis; compound 2a could not be characterized by single crystalX-raystructure determination because of the poor quality of the concerned crystals. Thus, we have synthesized the tetraphenyl phosphonium salt of the complex anion of 2a, [PPh4]2[Ni(Ph26,7-qdt)2]·3DMF (2b) for its structural characterization.
We report the synthesis of novel resorcin[4]arene-based cavitands featuring two extended bridges consisting of quinoxaline-fused TTF (tetrathiafulvalene) moieties. In the neutral form, these cavitands were expected to adopt the vase form, whereas, upon oxidation, the open kite geometry should be preferred due to Coulombic repulsion between the two TTF radical cations (Scheme 2). The key step in the