Issue 16, 2008
From the journal:

Physical Chemistry Chemical Physics

Amplified emission of phthalocyanine isolated in cryogenic matrices

Nadia Dozova,a   Ciaran Murray,a   John G. McCaffrey,*a   Niloufar Shafizadehb  and  Claudine Crépin*b  

* Corresponding authors

a Department of Chemistry, National University of Ireland—Maynooth, Co. Kildare, Ireland

b Laboratoire de PhotoPhysique Moléculaire du CNRS—Université Paris-Sud, Orsay, France
E-mail: john.mccaffrey@nuim.ie, claudine.crepin-gilbert@u-psud.fr

Abstract

Laser induced fluorescence spectroscopy of free-base (H2Pc) and zinc (ZnPc) phthalocyanines trapped in rare gas and nitrogen matrices reveals a quite unexpected phenomenon with a moderate increase in the laser intensity. In all matrices except Xe, a huge increase occurs in the intensity of an emission band near 755 nm when pumping the S1 ← S0 transition. The band involves a vibrational mode of the ground state, located at 1550 and 1525 cm−1 for H2Pc and ZnPc, respectively. Many of the characteristics of amplified emission (AE) are exhibited by this vibronic transition. Excitation scans recorded for the AE band yield greatly enhanced site selectivity compared to what is obtained in normal fluorescence excitation scans.

Graphical abstract: Amplified emission of phthalocyanine isolated in cryogenic matrices

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Article information

DOI
https://doi.org/10.1039/B718418B
Article type
Paper
Submitted
12 Dec 2007
Accepted
28 Jan 2008
First published
21 Feb 2008

Phys. Chem. Chem. Phys., 2008,10, 2167-2174

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Amplified emission of phthalocyanine isolated in cryogenic matrices

N. Dozova, C. Murray, J. G. McCaffrey, N. Shafizadeh and C. Crépin, Phys. Chem. Chem. Phys., 2008, 10, 2167 DOI: 10.1039/B718418B

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