Electronic properties of poly(1,4-phenylene methylidynenitrilo-1,4-phenylene nitrilomethylidyne) (PPI)

Poly(1,4-phenylene methylidynenitrilo-1,4-phenylene nitrilomethylidyne) (PPI) was prepared and investigated using UV spectroscopy and tunneling current measurements at metal/PPI interfaces. The difference between the LUMO and HOMO level energies of PPI is determined as well as its electron affinity....

Full description

Saved in:
Bibliographic Details
Published in:Synthetic metals 1997-10, Vol.90 (2), p.147-151
Main Authors: Nart, F.C., Péres, L.O., de Sá, E.L., Roman, L.S., Hümmelgen, I.A., Gruber, J., Li, R.W.C.
Format: Article
Language:English
Subjects:
Applied sciences
Electrical, magnetic and optical properties
Electron affinity
Exact sciences and technology
Fowler—Nordheim plots
Organic polymers
Physicochemistry of polymers
Poly(1,4-phenylene methylidynenitrilo-1,4-phenylene nitrilomethylidyne)
Properties and characterization
Quantum mechanical calculations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Poly(1,4-phenylene methylidynenitrilo-1,4-phenylene nitrilomethylidyne) (PPI) was prepared and investigated using UV spectroscopy and tunneling current measurements at metal/PPI interfaces. The difference between the LUMO and HOMO level energies of PPI is determined as well as its electron affinity. The measured shift of the LUMO level of PPI relative to unsubstituted poly( p-phenylene vinylene) (PPV) agrees with semi-empirical quantum mechanical calculations performed on the dimer using the CNDO/S method which predicts a stabilization of both LUMO and HOMO levels with respect to unsubstituted PPV.
ISSN:0379-6779
1879-3290
DOI:10.1016/S0379-6779(97)81264-7