Organic Polyradical Models for Organic Magnetic Materials
Abstract
A variety of model organic high spin molecules based upon coupled phenoxy and phenylnitrene systems has been examined by semiempirical MO-CI theory. Experimental methodology using photochemical and thermal methods in solution and solid phases to generate and study phenoxy groups for investigation of model systems is presented. Solid phase (PPMA matrix) ESR spectra for the solution-transient m- and p-stilbeneoxyl radicals are presented. These radicals do not persist even in rigid matrix at temperature above 190K, and appear to decompose in a site specific manner as the PPMA matrices are warmed to room temperature. 2,6-Tert-butylated phenoxyl radicals persist in PPMA for days under room conditions (solutions of these in air decompose within a day or two). The prospect of achieving partial orientation of phenoxyl radicals in polymer matrices is described. (JG)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 06, 1990
- Accession Number
- ADA223691
Entities
People
- D. A. Modarelli
- F. C. Rositto
- M. Minato
- P. M. Lahti
Organizations
- Massachusetts Institute of Technology