Porphyrins and Phthalocyanines—Correlation of Molecular Structure and Photoactivity

Wróbel, Danuta; Boguta, Andrzej

doi:10.1007/978-94-010-0349-0_7

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…2a and b (dye concentrations range from 10 −5 M to 10 −3 M). The Soret and Q bands (Table 1) are located at about 350 nm and 672/676 nm, respectively, as expected for phthalocyanine dyes in an organic solvent [25,37,50]. The presented absorption spectra show some changes in the shapes with increasing concentration-some broadening and increasing band and a small band's shift are seen in the Q band.…”

Section: Electronic Absorption and Fluorescence Investigationssupporting

confidence: 72%

“…Very attractive molecular materials such as photoconverters in photonics could be a family of synthetic phthalocyanines and porphyrins because of their electron donor-acceptor features, and they can find applications in devices where electron and energy transfer processes are essential [25][26][27][35][36][37][38]. However, some porphyrins and phthalocyanines tend to form aggregated species under specific conditions and their ability to create aggregates depends very strongly on their molecular structure and environment.…”

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confidence: 99%

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Triplet Thermal Relaxation Study as a Probe of Weak Interdimers of Porphyrin Derivatives

2011

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This article deals with results concerning the study of interacting dyes which are able to create weak interdimers. Two groups of organic systems: phthalocyanines (di-ethanol-amine and di-octane-amine) and pyridyl porphyrins (zinc, copper, and free-base) covalently linked to polyethylene glycol (PEG) in water and organic solvents (dioxane, dimethylsulfoxide) were investigated. Absorption, fluorescence, and photoacoustics were used as experimental methods but particular attention was paid to light-induced optoacoustic spectroscopy to follow the dye's triplet population and triplet thermal relaxation to study intermolecular interactions. It has been shown that even the weak interactions of the organic dyes under study is not detectable by absorption and only slightly by fluorescence is it possible to follow interactions by complementary photothermal methods. The results obtained for selected phthalocyanines and covalent porphyrin-polymer samples evidently show that the lightinduced optoacoustic experiment is a perfect tool in the detection of weakly interacting aggregates.

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Section: Electronic Absorption and Fluorescence Investigationssupporting

confidence: 72%

mentioning

confidence: 99%