Journal ArticleDOI
Singlet Oxygen Quantum Yields of Different Photosensitizers in Polar Solvents and Micellar Solutions
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TLDR
In this paper, the single oxygen quantum yields of different phthalocyanines and tris(2,2″-bipyridyl)ruthenium(II) dichloride in dimethylformamide (DMF) or aqueous micellar solution of 0.1 M CTAC (cetyltrimethylammonium chloride).Abstract:
The singlet oxygen luminescence method and the photochemical methods using 1,3-diphenylisobenzofuran (DPBF) or bilirubin ditaurate (BDT) as chemical quenchers were employed to determine the single oxygen quantum yields (ΦΔ) of different phthalocyanines and tris(2,2″-bipyridyl)ruthenium(II) dichloride in dimethylformamide (DMF) or aqueous micellar solution of 0.1 M CTAC (cetyltrimethylammonium chloride). Additionally, a perylenetetracarboxylic acid diimide derivative was examined in DMF. In a series of tetrasulfonated phthalocyanines (PTS) the following order was found: ZnPTS > GaPTS > AlPTS ≈ H2PTS > CoPTS. In general, the singlet oxygen quantum yields are higher in DMF than in 0.1 M CTAC/H2O. The results obtained with the photochemical systems are comparable with those obtained by the photophysical method. The photochemical DPBF method results in absolute values of ΦΔ. However, in micellar solution, chain reactions occur when DPBF is used as chemical quencher in the photo-oxidative process. This problem ...read more
Citations
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Activatable photosensitizers for imaging and therapy
TL;DR: This work focuses on the design and implementation of Activatable Photosensitizer Design Considerations, a very simple and straightforward process that simplifies and automates the very labor-intensive and therefore time-heavy and expensive process of Activation Mechanism Selection.
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Covalent organic frameworks based on Schiff-base chemistry: synthesis, properties and potential applications
TL;DR: This critical review article summarizes the current state-of-the-art on the design principles and synthetic strategies toward COFs based on Schiff-base chemistry, collects and rationalizes their physicochemical properties, as well as aims to provide perspectives of potential applications which are at the forefront of research in materials science.
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Highly efficient drug delivery with gold nanoparticle vectors for in vivo photodynamic therapy of cancer.
Yu Cheng,Anna Cristina S. Samia,Joseph D. Meyers,Irene Panagopoulos,Baowei Fei,Clemens Burda +5 more
TL;DR: A highly efficient drug vector for photodynamic therapy (PDT) drug delivery was developed by synthesizing PEGylated gold nanoparticle conjugates, which act as a water-soluble and biocompatible "cage" that allows delivery of a hydrophobic drug to its site of PDT action as discussed by the authors.
Journal ArticleDOI
Photophysical and photochemical studies of zinc(II) phthalocyanine derivatives—effects of substituents and solvents
TL;DR: The effects of substituents and solvents on the photophysical and photochemical parameters of zinc(II) phthalocyanines are reported in this paper, where it was found that the presence of peripheral substituent on the macrocycle enhances the yield of the triplet state.
Journal ArticleDOI
Effects of substituents on the photochemical and photophysical properties of main group metal phthalocyanines
TL;DR: In this article, the photochemical and photophysical properties of metallophthalocyanine complexes containing main group metals (Zn, Al, Ge, Si, Sn, Ga and In) were reviewed.
References
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Journal ArticleDOI
Ru(II) polypyridine complexes: photophysics, photochemistry, eletrochemistry, and chemiluminescence
Alberto Juris,Vincenzo Balzani,F. Barigelletti,Sebastiano Campagna,Peter Belser,A. Von Zelewsky +5 more
Journal ArticleDOI
Quantum Yields for the Photosensitized Formation of the Lowest Electronically Excited Singlet State of Molecular Oxygen in Solution
TL;DR: In this paper, the fraction of singlet and triplet states quenched by ground state molecular oxygen produces singlet oxygen, the lowest electronically excited singlet state of molecular oxygen, O2(1Δg).
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Metal phthalocyanines and porphyrins as photosensitizers for reduction of water to hydrogen
TL;DR: In this paper, it was shown that metalloporphyrins, especially ZnTMPyP(4+), can function as very efficient photosensitizers for the reduction of water to H(2) using either oxidation or reduction cycles.
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Rate constants for the decay and reactions of the lowest electronically excited singlet state of molecular oxygen in solution
TL;DR: The available rate data on the reactivity and physical deactivation of molecular oxygen in its first electronic excited state (1Δg) in liquid solution have been critically compiled as discussed by the authors.
Journal ArticleDOI
Phthalocyanines as photodynamic sensitizers.
TL;DR: The most cherished goals of pharmacology are the development of selective therapeutic agents which affect exclusively the target tissue and research of the last few years has boosted these dyes to the position of viable candidates for PDT.