Formation of a perylenetetracarboxylic diimide network film by post electrochemical treatment.
Perylenetetracarboxylic diimide (PDI) derivatives bearing two or four peripheral pyrrole pendants (PDI-nPy, n=2 or 4) are cross-linkable materials by electro/phototreatment. In this paper, we introduce a new posttreatment technique to produce an insoluble film. Unlike the common solution-phase electrochemical deposition, we first spin-coated PDI-nPy on an electrode and then electrotreated the coated surface in a monomer-free electrolyte solution. This method gives the film a smooth surface with no granules, while the common method induces a rough film with a lot of granules. The post electrochemical treatment also provides a merit of higher resolution in a patterning process on a specific metal electrode. As one of the applications, we carried out an electrochromic study on the posttreated PDI-4Py film. It turned purple (lambdamax=590 nm) and sky blue (lambdamax=797 nm) at 0 and -1.9 V vs Ag/Ag+, respectively. We believe this method will broaden the patterning concept with the desired film morphology and resolution using PDI on a specific electrode.
Kim
Suk-ho
SH
Department of Chemistry, Sogang University, 1-1 Sinsoo-Dong, Mapo-Gu, Seoul 121-742, Korea.
Ko
Heung Cho
HC
Moon
Bongjin
B
Lee
Hoosung
H
D004563:Electrochemistry; D007094:Imides / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D013057:Spectrum Analysis
D007094:Imides; C517085:perylenetetracarboxylic diimide; D010569:Perylene