Issue 47, 2014
From the journal:

Physical Chemistry Chemical Physics

Spectroscopic and photophysical study of the demetallation of a zinc porphyrin and the aggregation of its free base in a tetraalkylphosphonium ionic liquid†

Neeraj K. Giri,a   Abhinandan Banerjee,a   Robert W. J. Scott,a   Matthew F. Paige*a  and  Ronald P. Steer*a  

* Corresponding authors

a Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
E-mail: ron.steer@usask.ca, matthew.paige@usask.ca

Abstract

Dissolving zinc tetraphenylporphyrin in the tetraalkylphosphonium chloride ionic liquid P4448Cl results in progressive demetallation of the solute and quantitative production of the free base porphyrin. Aggregation of the free base occurs in which the monomer and J aggregates are in fully reversible thermal equilibrium in the ionic liquid. The thermodynamic, kinetic and spectroscopic behaviour of this system is described based on absorption, emission and excited state lifetime measurements. Both the thermodynamics of the ground state aggregation and the kinetics of the excited state relaxation processes are unusual due to the particular role played by the ionic liquid solvent.

Graphical abstract: Spectroscopic and photophysical study of the demetallation of a zinc porphyrin and the aggregation of its free base in a tetraalkylphosphonium ionic liquid

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Article information

DOI
https://doi.org/10.1039/C4CP04257C
Article type
Paper
Submitted
22 Sep 2014
Accepted
28 Oct 2014
First published
28 Oct 2014

Phys. Chem. Chem. Phys., 2014,16, 26252-26260

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Spectroscopic and photophysical study of the demetallation of a zinc porphyrin and the aggregation of its free base in a tetraalkylphosphonium ionic liquid

N. K. Giri, A. Banerjee, R. W. J. Scott, M. F. Paige and R. P. Steer, Phys. Chem. Chem. Phys., 2014, 16, 26252 DOI: 10.1039/C4CP04257C

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