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Titolo:
TRIPLET SPECIES FROM NORBORNADIENE - TIME-RESOLVED PHOTOACOUSTIC CALORIMETRY AND AB-INITIO STUDIES OF ENERGY, GEOMETRY, AND SPIN-ORBIT-COUPLING
Autore:
HELMS AM; CALDWELL RA;
Indirizzi:
UNIV TEXAS,DEPT CHEM RICHARDSON TX 75083 UNIV TEXAS,DEPT CHEM RICHARDSON TX 75083
Titolo Testata:
Journal of the American Chemical Society
fascicolo: 1, volume: 117, anno: 1995,
pagine: 358 - 361
SICI:
0002-7863(1995)117:1<358:TSFN-T>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PULSE-RADIOLYSIS; QUADRICYCLENES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
A.M. Helms e R.A. Caldwell, "TRIPLET SPECIES FROM NORBORNADIENE - TIME-RESOLVED PHOTOACOUSTIC CALORIMETRY AND AB-INITIO STUDIES OF ENERGY, GEOMETRY, AND SPIN-ORBIT-COUPLING", Journal of the American Chemical Society, 117(1), 1995, pp. 358-361

Abstract

The norbornadiene triplet is directly observed and its energy measured for the first time by time-resolved photoacoustic calorimetry. PAC affords a transient subsequent to the sensitizer triplet, with a lifetime of 6.20 +/- 0.03 ns and an energy of 61.37 +/- 0.25 kcal/mol relative to ND, which we have ascribed to the norbornadiene tripler. The lifetime of the triplet, which is anomalously short, is determined by therate at which the species undergoes rearrangement along the path to quadricyclane. Calculations for the norbornene triplet indicate that its short lifetime is consistent with T-1 --> S-0 intersystem crossing.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:27:23