Transient EPR studies of excited triplet states in polyadducts of C60 and bis(ethoxycarbonyl)methylene

Pasimeni L, Lamparth I, Hirsch A, Maggini M, Prato M (1997)

Publication Type: Journal article, Original article

Publication year: 1997

Journal

Journal of the American Chemical Society American Chemical Society

Original Authors: Pasimeni L., Hirsch A., Lamparth I., Maggini M., Prato M.

Publisher: American Chemical Society

Book Volume: 119

Pages Range: 12902-12905

Journal Issue: 52

DOI: 10.1021/ja970959v

Abstract

Transient EPR spectra of the excited triplet states in polyadducts of C with bis(ethoxycarbonyl)methylene were measured. The equatorial- equatorial-equatorial (eee) and trans-3, trans-3, trans-3 (t3t3t3) trisadducts together with tetrakis-, pentakis-, and hexakisadduct obtained by equatorial successive addition were examined. zfs parameters D and E and spin polarization earned by the triplet species were determined by spectrum simulation. D, E values for tetrakis-, pentakis-, and hexakisadducts are very well differentiated, which makes their identification quite easy. Additionally, polarized EPR spectra of the eee and t3t3t3 trisadducts exhibit an impressive difference also in the line shape (absorption/emission polarization of eee reverts into emission/absorption for t3t3t3), accounted for by a sign reversal of D. Changes in strength of D and E values are described in terms of a simple model calculation previously applied to C and monoadducts.

Authors with CRIS profile

Andreas Hirsch Lehrstuhl für Organische Chemie II

Involved external institutions

University of Padua / Universita degli Studi di Padova IT Italy (IT) Università degli Studi di Trieste IT Italy (IT)

How to cite

APA:

Pasimeni, L., Lamparth, I., Hirsch, A., Maggini, M., & Prato, M. (1997). Transient EPR studies of excited triplet states in polyadducts of C60 and bis(ethoxycarbonyl)methylene. Journal of the American Chemical Society, 119(52), 12902-12905. https://doi.org/10.1021/ja970959v

MLA:

Pasimeni, Luigi, et al. "Transient EPR studies of excited triplet states in polyadducts of C60 and bis(ethoxycarbonyl)methylene." Journal of the American Chemical Society 119.52 (1997): 12902-12905.

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