Novel dithiolene complexes incorporating conjugated electroactive ligands.
A series of new metal (M) dithiolene complexes bearing terthiophene (3, 12, M = Ni; 4, M = Pd; 5, 6, M = Au) and 2,5-bis(para-methoxyphenyl)thiophene units (14, M = Ni; 15, 16, M = Au; 17, M = Pd) have been synthesised in 38-99% yield. The electrochemical properties of the materials have been characterised by cyclic voltammetry and UV-vis spectroelectrochemistry. The nickel complexes possess low oxidation potentials (-0.12 to -0.25 V vs Ag/AgCl) due to the electron-rich dithiolene centres and all complexes display ligand-based redox activity. The terthiophene derivatives have been polymerised by electrochemical oxidation to give stable films with, in the case of poly(3), broad absorption characteristics. Charge transfer materials have been isolated from 14 and 16 with conductivities in the range 9 x 10(-6) to 7 x 10(-8) S cm(-1).
Skabara
Peter J
PJ
WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, UK G1 1XL. peter.skabara@strath.ac.uk
Pozo-Gonzalo
Cristina
C
Lardiés Miazza
Nora
N
Laguna
Mariano
M
Cerrada
Elena
E
Luquin
Asun
A
González
Blanca
B
Coles
Simon J
SJ
Hursthouse
Michael B
MB
Harrington
Ross W
RW
Clegg
William
W