Back to Search
Start Over
A High-Spin and Durable Polyradical: Poly(4-diphenylaminium-1,2-phenylenevinylene).
- Source :
-
Journal of Organic Chemistry . 2/6/2004, Vol. 69 Issue 3, p631-638. 8p. 4 Diagrams, 3 Charts, 4 Graphs. - Publication Year :
- 2004
-
Abstract
- A purely organic, high-spin, and durable polyradical molecule was synthesized: It is based on the non-Kekulé- and non-disjoint design of a π-conjugated poly(1,2-phenylenevinylene) backbone pendantly 4-substituted with multiple robust arylaminium radicals. 4-N,N-Bis(4-methoxy- and -tertbutylphenyl)amino-2-bromostyrene 5 were synthesized and polymerized with a palladiumphosphine catalyst to afford the head-to-tail-linked polyradical precursors (1). Oxidation of i with the nitrosonium ion solubilized with a crown ether gave the aminium polyradicals (1+) which were durable (half-life > 1 month) at room temperature in air. A high-spin ground state with an average S = (4.5)/2 for 1a+ was proved even at room temperature by magnetic susceptibility, magnetization, ESR, and NMR measurements. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00223263
- Volume :
- 69
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Organic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 12438998
- Full Text :
- https://doi.org/10.1021/jo0302758