Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins

Emília G. Azenha; Arménio C. Serra; Marta Pineiro; Mariette M. Pereira; J. Seixas de Melo; Luis G. Arnaut; Sebastião J. Formosinho; A. M.d.A. Rocha Gonsalves

doi:10.1016/S0301-0104(02)00485-8

Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins

Emília G. Azenha, Arménio C. Serra, Marta Pineiro, Mariette M. Pereira, J. Seixas de Melo, Luis G. Arnaut^*, Sebastião J. Formosinho, A. M.d.A. Rocha Gonsalves

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

190 Citations (Scopus)

Abstract

The photophysics of halogenated and metallated tetrakisphenylporphyrins is investigated using single-photon counting, photoacoustic calorimetry and luminescence techniques. The radiationless transition rates in these and related molecules are interpreted with a quantum-mechanical tunnelling model modified to include the effect of spin-orbit coupling in the intersystem crossing rates. It is shown that tetrakisphenylporphyrins with halogens in the ortho positions have long-lived triplet states that are formed in high yields.

Original language	English
Pages (from-to)	177-190
Number of pages	14
Journal	Chemical Physics
Volume	280
Issue number	1-2
DOIs	https://doi.org/10.1016/S0301-0104(02)00485-8
Publication status	Published - 15 Jun 2002

Keywords

Heavy-atom effect
Porphyrins
Radiationless transitions
Tunnel-effect theory

Access to Document

10.1016/S0301-0104(02)00485-8

Cite this

@article{3e883ac89a34481392d82d4457900045,

title = "Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins",

abstract = "The photophysics of halogenated and metallated tetrakisphenylporphyrins is investigated using single-photon counting, photoacoustic calorimetry and luminescence techniques. The radiationless transition rates in these and related molecules are interpreted with a quantum-mechanical tunnelling model modified to include the effect of spin-orbit coupling in the intersystem crossing rates. It is shown that tetrakisphenylporphyrins with halogens in the ortho positions have long-lived triplet states that are formed in high yields.",

keywords = "Heavy-atom effect, Porphyrins, Radiationless transitions, Tunnel-effect theory",

author = "Azenha, \{Em{\'i}lia G.\} and Serra, \{Arm{\'e}nio C.\} and Marta Pineiro and Pereira, \{Mariette M.\} and \{Seixas de Melo\}, J. and Arnaut, \{Luis G.\} and Formosinho, \{Sebasti{\~a}o J.\} and \{Rocha Gonsalves\}, \{A. M.d.A.\}",

year = "2002",

month = jun,

day = "15",

doi = "10.1016/S0301-0104(02)00485-8",

language = "English",

volume = "280",

pages = "177--190",

journal = "Chemical Physics",

issn = "0301-0104",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins

AU - Azenha, Emília G.

AU - Serra, Arménio C.

AU - Pineiro, Marta

AU - Pereira, Mariette M.

AU - Seixas de Melo, J.

AU - Arnaut, Luis G.

AU - Formosinho, Sebastião J.

AU - Rocha Gonsalves, A. M.d.A.

PY - 2002/6/15

Y1 - 2002/6/15

N2 - The photophysics of halogenated and metallated tetrakisphenylporphyrins is investigated using single-photon counting, photoacoustic calorimetry and luminescence techniques. The radiationless transition rates in these and related molecules are interpreted with a quantum-mechanical tunnelling model modified to include the effect of spin-orbit coupling in the intersystem crossing rates. It is shown that tetrakisphenylporphyrins with halogens in the ortho positions have long-lived triplet states that are formed in high yields.

AB - The photophysics of halogenated and metallated tetrakisphenylporphyrins is investigated using single-photon counting, photoacoustic calorimetry and luminescence techniques. The radiationless transition rates in these and related molecules are interpreted with a quantum-mechanical tunnelling model modified to include the effect of spin-orbit coupling in the intersystem crossing rates. It is shown that tetrakisphenylporphyrins with halogens in the ortho positions have long-lived triplet states that are formed in high yields.

KW - Heavy-atom effect

KW - Porphyrins

KW - Radiationless transitions

KW - Tunnel-effect theory

UR - https://www.scopus.com/pages/publications/0037097512

U2 - 10.1016/S0301-0104(02)00485-8

DO - 10.1016/S0301-0104(02)00485-8

M3 - Article

AN - SCOPUS:0037097512

SN - 0301-0104

VL - 280

SP - 177

EP - 190

JO - Chemical Physics

JF - Chemical Physics

IS - 1-2

ER -

Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this