Accession Number:

ADA014918

Title:

2,3,7,8-Tetramethoxythianthrene: A Novel Ground State Triplet Dication, The Neutral Photogenerated Triplet, and the Radical Cation.

Descriptive Note:

Technical rept. 30 Sep 74-30 Jun 75,

Corporate Author:

ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CALIF SCIENCE CENTER

Personal Author(s):

Report Date:

1975-08-01

Pagination or Media Count:

23.0

Abstract:

The dication of 2,3,7,8-tetramethoxythianthrene was studied in solid nitromethane at 77K by computer controlled electron spin resonance. The Delta m2 transition was observed, yielding a value of D 0.094cm. For comparison the value of D for thianthrene and 2,3,7,8-tetramethoxythianthrene photogenerated triplets determined. Lifetimes of these triplet states were also determined. Frozen solutions of the tetramethoxythianthrene dication exhibited a very broad Delta m1 signal that could not be resolved into components D and E of the dipolar tensor. The free energy separation between the triplet and singlet states is between 90 and 190cm. The esr spectrum of the cation was redetermined.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE