Accession Number:

ADA263129

Title:

Synthesis of Oligoimides and Oligoimide Anion Radicals

Descriptive Note:

Final technical rept.,

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1992-01-01

Pagination or Media Count:

11.0

Abstract:

Key to the results described in parts B-D are compounds based on naphthalene dianhydride A and dimethoxybenzidine B. It was demonstrated that AB type oligoimides with lengths up to 80 A 8nm BABABAB could be synthesized as single molecular weight, pure and usually soluble compounds. Although rotation about the single bonds along the chain is possible, the chains cannot fold. These oligomers constitute the longest, single molecular weight rigid rods that are known. Various end groups could be attached and unsymmetrical rigid rods different end groups could be prepared. The compounds were characterized by NMR, IR, MS and HPLC. In one case a single crystal was obtained which confirmed the linear structure and that the B units were twisted with respect to the A units. Electrochemical studies showed that the naphthalene diimide group A formed anion radical A- and dianions A, which were stable in DMF in the absence of air.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE