Accession Number:

ADA234595

Title:

Electroactive, Near Infrared Absorbing Nickel Bis(dithiolene) Complex Polycarbonates and Polyurethanes

Descriptive Note:

Technical rept.

Corporate Author:

TEXAS UNIV AT ARLINGTON CENTER FOR ADVANCED POLYMER RESEARCH

Report Date:

1991-04-12

Pagination or Media Count:

46.0

Abstract:

A new series of polycarbonates and polyurethanes, containing nickel bisdithiolene Ni-BDT complexes in the main chain, have been synthesized via polymerization of a functionalized Ni-BDT complex. These polymers are highly soluble in common organic solvents, and free-standing films can be cast from solution. Gel permeation chromatographic analysis on these polymers indicates hydrodynamic volumes comparable to polystyrene standards having weight average molecular weights Mw ranging from 1.35 x 10 to the fourth power to 9.8 x 10 to the fourth power. These polymers exhibit a near-IR absorbance between 830-940 nm in solution due to the Ni-BDT complex and solvatochromism is observed with more polar solvents shifting the near-IR absorbance band to higher wavelength. A single glass transition Tg is observed for all polymers, suggesting a relatively random polymerization no phase separation. The Tgs of the polycarbonates decrease with increased Ni-BDT, while the Tgs of the polyurethanes increase, as expected for changes in chain rigidity. Most of the Ni-BDT complex polymers are electroactive with a two step redox process, typical for Ni-BDT complexes, observed in cyclic voltammograms of the polymers in solution. The results presented herein indicate that the incorporation of Ni-BDT complexes into polymer main chains impart the unique optoelectronic properties of Ni-BDTs to the polymer.

Subject Categories:

  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE