The excitation wavelength dependent fluorescence of porphyrins

Mahesh Uttamlal; A. Sheila Holmes-Smith

doi:10.1016/j.cplett.2008.02.012

The excitation wavelength dependent fluorescence of porphyrins

Mahesh Uttamlal, A. Sheila Holmes-Smith

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119 Citations (Scopus)

Abstract

Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual ¹(p¿p^*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Q_x(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.

Original language	English
Pages (from-to)	223-228
Number of pages	6
Journal	Chemical Physics Letters
Volume	454
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2008.02.012
Publication status	Published - 1 Mar 2008

Keywords

fluorescence
porphyrins

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10.1016/j.cplett.2008.02.012

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title = "The excitation wavelength dependent fluorescence of porphyrins",

abstract = "Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.",

keywords = "fluorescence, porphyrins",

author = "Mahesh Uttamlal and Holmes-Smith, {A. Sheila}",

note = "<p>Originally published in: Chemical Physics Letters (2008), 454 (4-6), pp.223-228.</p>",

year = "2008",

month = mar,

day = "1",

doi = "10.1016/j.cplett.2008.02.012",

language = "English",

volume = "454",

pages = "223--228",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - The excitation wavelength dependent fluorescence of porphyrins

AU - Uttamlal, Mahesh

AU - Holmes-Smith, A. Sheila

N1 - <p>Originally published in: Chemical Physics Letters (2008), 454 (4-6), pp.223-228.</p>

PY - 2008/3/1

Y1 - 2008/3/1

N2 - Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.

AB - Spectroscopic studies of meso-tetraphenylporphyrin and other meso-substituted porphyrin derivatives have revealed a dual fluorescence emission process. The first emission is the usual 1(p¿p*) transition. The second alternative emission process is proposed to arise following tautomerism of the inner macrocyclic hydrogen atoms via an atom tunnelling process. This process occurs when exciting at virtually all wavelengths in the Q band region but, is at its most intense when exciting at the Qx(0,0) band and is not observed when exciting at the Soret band maximum, i.e., the emission spectrum of TPP is dependent on the excitation wavelength.

KW - fluorescence

KW - porphyrins

U2 - 10.1016/j.cplett.2008.02.012

DO - 10.1016/j.cplett.2008.02.012

M3 - Article

VL - 454

SP - 223

EP - 228

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

The excitation wavelength dependent fluorescence of porphyrins

Abstract

Keywords

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