Next Article in Journal
Imidazolium Ionic Liquid Functionalized Carbon Nanotubes for Improved Interfacial Charge Transfer and Simultaneous Determination of Dihydroxybenzene Isomers
Next Article in Special Issue
Immobilized Lignin Peroxidase-Like Metalloporphyrins as Reusable Catalysts in Oxidative Bleaching of Industrial Dyes
Previous Article in Journal
Multivalent Carbohydrate-Lectin Interactions: How Synthetic Chemistry Enables Insights into Nanometric Recognition
Previous Article in Special Issue
Development of Singlet Oxygen Luminescence Kinetics during the Photodynamic Inactivation of Green Algae
Open AccessArticle

Mechanism of the Zn(II)Phthalocyanines’ Photochemical Reactions Depending on the Number of Substituents and Geometry

Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos-SP, Brazil
Department of Chemistry, Faculty of Science, Gebze Technical University, P. O. Box 141, Gebze, 41400 Kocaeli, Turkey
Laboratoire de Chimie de l’ENS de Lyon, CNRS UMR 5182, Université Lyon I, ENS de Lyon, 46 allée d’Italie, 69364 Lyon cedex 07, France
Authors to whom correspondence should be addressed.
Academic Editors: M. Graça P. M. S. Neves and M. Amparo F. Faustino
Molecules 2016, 21(5), 635;
Received: 12 March 2016 / Revised: 28 April 2016 / Accepted: 3 May 2016 / Published: 14 May 2016
PDF [1246 KB, uploaded 19 May 2016]


In this work, the synthesis and the nonlinear absorption and population dynamics investigation of a series of zinc phthalocyanines (ZnPcs) dissolved in chloroform are reported. In order to determine the relevant spectroscopic parameters, such as absorption cross-sections of singlet and triplet excited states, fluorescence relaxation times, intersystem crossing, radiative decay and internal conversion, different optical and spectroscopic techniques were used. By single pulse and pulse train Z-scan techniques, respectively, singlet and triplet excited states‘ absorption cross-section were determined at 532 nm. Furthermore, the intersystem crossing time was obtained by using both techniques combined with the fluorescence lifetime determined by time-resolved fluorescence. The radiative and internal conversion rates were determined from the fluorescence quantum yield of the samples. Such spectroscopy parameters are fundamental for selecting photosensitizers used in photodynamic therapy, as well as for many other applications. View Full-Text
Keywords: Zn(II)phthalocyanine; optical nonlinearities; luminescence Zn(II)phthalocyanine; optical nonlinearities; luminescence

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material


Share & Cite This Article

MDPI and ACS Style

Zucolotto Cocca, L.H.; Ayhan, M.M.; Gürek, A.G.; Ahsen, V.; Bretonnière, Y.; De Paula Siqueira, J.; Gotardo, F.; Mendonça, C.R.; Hirel, C.; De Boni, L. Mechanism of the Zn(II)Phthalocyanines’ Photochemical Reactions Depending on the Number of Substituents and Geometry. Molecules 2016, 21, 635.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top