Photophysical Properties and Electropolymerization of Gold Complexes of 3,3′′-Diethynyl-2,2′:5′,2′′-terthiophene

Abstract

The preparation and crystal structures of 3,3''-diethynyl-2,2':5',2''-terthiophene (A(2)T(3)) and three Au(I) complexes containing this ligand are reported. One of the complexes, Au(2)(dppm)(A(2)T(3)), has a short Au-Au distance (3.1969 A) because of an aurophilic interaction. UV/vis absorption and emission spectra of the complexes and ligand at 298 and 85 K and photoinduced electron transfer to methyl viologen are reported. A(2)T(3) and two of the complexes may be electropolymerized, and the resulting gold-containing films were characterized by X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry.

Aggregation induced emission of a new naphthyridine-ethynyl–gold(i) complex as a potential tool for sensing guanosine nucleotides in aqueous media

“…Over the past years, research on alkynyl-gold(I) complexes (AGCs) has experienced a significant growth, mainly due to their luminescent properties, which confers them with outstanding potential for several applications, including molecular electronics and materials science. [1][2][3] AGCs are linear complexes, with a central Au(I) bound to two axial ligands, one of which is a terminal alkyne. The general strategy for obtaining luminescent AGCs relies on the fact that one of the ligands is, in fact, a fluorophore by itself whose triplet emission is strongly increased due to the strong heavy atom effect induced by Au(I) which favors Inter-System Crossing (ISC).…”

Dimensionality Selection in a Molecule-Based Magnet

“…The choice of initial components permits a high level of control over the final product, enabling many different polymeric architectures to be obtained [1]. These materials provide a route to successful crystal engineering, and a number of functionalities are being actively studied, including gas storage [2-4], optoelectronic [5,6], ferroelectric [7,8] and magnetic properties [9-14].Although it is now possible to generate an assortment of disparate magnetic lattices using this method [15,16], true control of magnetic exchange interactions implies an ability to adjust selected parameters while keeping others constant. To this end, a series of coordination polymers based on Cu(II) ions bridged by pyrazine (C 4 H 4 N 2 ) molecules have proven to be highly versatile.…”

“…The choice of initial components permits a high level of control over the final product, enabling many different polymeric architectures to be obtained [1]. These materials provide a route to successful crystal engineering, and a number of functionalities are being actively studied, including gas storage [2][3][4], optoelectronic [5,6], ferroelectric [7,8] and magnetic properties [9][10][11][12][13][14].…”

Thiophene-Based Trimers and Their Bioapplications: An Overview

“…Sonogashira coupling with 2-methyl-3-butyn-2-ol followed by deprotection with potassium hydroxide provided monosubstituted trimers [ 157 , 158 , 159 ]. Tetrabutylammonium fluoride has been also reported as efficient deprotecting agent [ 160 , 161 ]. Wittig reaction with an halogen derivate has also been used to form an alkene and, subsequently an triple in bond in 3′ by intramolecular elimination [ 162 ].…”