193015-27-9Relevant academic research and scientific papers
An electropolymerisable pyridine-functionalised gold bis(dithiolene) complex
Oliveira, Sandrina,Afonso, Monica L.,Dias, Sandra I. G.,Santos, Isabel C.,Henriques, Rui T.,Rabaca, Sandra,Almeida, Manuel
, p. 3133 - 3136 (2013)
A new pyridine-substituted dithiolene complex, PPh4[Au(4-pdddt) 2] (3), was prepared and characterised. Cyclic voltammetry shows three redox processes corresponding to the interconversion between dianionic, monoanionic, neutral and cationic states, as often presented by this type of bis(dithiolene) complexes. However, the last oxidation process in this compound leads to a polymerised species obtained as an electrodeposited film. By potentiostatic electrodeposition, thin films of either the neutral gold complex, [Au(4-pdddt)2] (4), or the polymerised cationic species can be obtained. Both films absorb strongly in the NIR region and have properties consistent with the incorporation of the intact metal bis(dithiolene) complex. A mechanism for polymerisation through formation of S-S interligand bonds is proposed. Pyridine-substituted dithiolene gold complex [Au(4-pdddt)2] shows three redox processes corresponding to the interconversion between dianionic, monoanionic, neutral and cationic states, the last one corresponding to a polymerised species obtained as an electrodeposited film. Copyright
New electron donors: BEDT-TTF derivatives bearing a pyridine group; synthesis, crystal structure, electrochemical studies and the formation of charge transfer complexes
Xu, Wei,Zhang, Deqing,Li, Hongxiang,Zhu, Daoben
, p. 1245 - 1250 (1999)
Bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) derivatives 1a,b and 2a,b containing a pyridine group have been synthesized and their redox potentials have been studied by cyclic voltammetry in dichloromethane solution, which indicate that they are weaker electron donors than BEDT-TTF. Compound 2b has been studied by X-ray crystallography, which revealed a column-packing pattern in its crystal lattice. The charge transfer (CT) complexes formed between these new donors and tetracyanoquinodimethane (TCNQ), 2,3-dichloro-5,6-dicyanobenzo-1,4-quinone (DDQ) as well as cupric chloride (CuCl2) have been investigated. Among them the CT complexes 1b1.1*TCNQ and 1a*CuCl2 show conductivity in the semiconducting range at room temperature (?rt=1.6*10-3 S cm-1 for 1b1.1*TCNQ, 4.3*10-3 S cm-1 for 1a*CuCl2 measured on a compressed pellet). From the results of X-ray photoelectron spectroscopy (XPS) and conductivity measurements, we suggest that charge transfer and coordination contact coexist in the complex 1a*CuCl2.
Pyridyl-substituted [1,3]dithiolo-[4,5-b][1,4]dithiine-2-thiones
Koshevaya,Starodub,Fenske
, p. 374 - 378 (2005)
We have obtained 5-(2-pyridyl)[1,3]dithiolo[4,5-b][1,4]dithiine-2-thione for the first time by cycloaddition of 2-ethynylpyridine to 4,5-dihydro-1,3- dithioltrithione (isotrithionedithiol). We have studied this thione, 5-(2-pyridyl)- and 5-(4-pyridyl)-5,6-dihydro[1,3]dithiolo[4,5-b][1,4]dithiine-2- thiones by mass spectroscopy and also IR, UV, 1H and 13C NMR spectra. We have determined the crystal and molecular structure of 5-(2-pyridyl)-5,6-dihydro[1,3]dithiolo[4,5-b][1,4]dithiine-2-thione.
