Femtosecond time-resolved photophysics and photodissociation dynamics of 1-iodonaphthalene

Montero Gilete, Raul; Peralta Conde, Alvaro; Longarte Aldama, Asier; Almendral Castaño, Fernando; Corrales Castellanos, María Eugenia; Nalda Míguez, Rebeca de; Bañares Morcillo, Luis

Femtosecond time-resolved photophysics and photodissociation dynamics of 1-iodonaphthalene

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Femtosecond_time-resolved_photophysics.pdf (1.24 MB)

Official URL

https://doi.org/10.1039/C000121j

Publication date

2010

Authors

Montero Gilete, Raul

Peralta Conde, Alvaro

Longarte Aldama, Asier

Almendral Castaño, Fernando

Corrales Castellanos, María Eugenia

Nalda Míguez, Rebeca de

Bañares Morcillo, Luis

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URI

https://hdl.handle.net/20.500.14352/94608

Citation

Montero, Raul, et al. «Femtosecond Time-Resolved Photophysics and Photodissociation Dynamics of 1-Iodonaphthalene». Physical Chemistry Chemical Physics, vol. 12, n.o 28, 2010, p. 7988. https://doi.org/10.1039/c000121j.

Abstract

The ultrafast relaxation of 1-iodonaphthalene, with particular attention to the dissociation channels, has been studied by time-resolved femtosecond pump–probe mass spectrometry following excitation at 267 and 317 nm. The measured transients for the parent ion and the isobaric fragments, iodine and naphthyl radical, show complex decay profiles with up to four lifetimes in the femto-picosecond time scales. The transients are interpreted as the result of parallel relaxation of the simultaneously excited nσ* and ππ* states of the molecule. While the former leads to dissociation in about 400 fs, the latter converts to lower energy ππ* singlet states at an ultrafast rate (24 fs) followed by intersystem crossing to nearby ππ* triplet states.