Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 370051
Title Porphyrazines with oligo(ethylene oxide) thio alkoxy chains: Synthesis, aggregation, photophysics, and complexation with redox-active ions
Author(s) Piet, D.P.; Veldhuis, H.; Zuilhof, H.; Sudhölter, E.J.R.
Source Journal of Porphyrins and Phthalocyanines 8 (2004)8. - ISSN 1088-4246 - p. 1055 - 1061.
Department(s) Organic Chemistry
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) transition-metal ions - crystal-structure - solar-cells - titanium-dioxide - phthalocyanines - sensitization - porphyrin - electrode - phase - rings
Abstract A series of new porphyrazines with oligo(ethylene oxide) thioalkoxy side chains has been synthesized. Study of the phase transitions reveals the absence of liquid crystallinity. Due to the ethylene oxide moieties, the solubility in a variety of solvents is dramatically increased. This allowed the first study of solvent effects on the photophysical properties (absorption and emission) in water and chloroform. The complexation of the porphyrazines with the redox couple LiI/I2 has been studied. No effect on the aggregate formation has been observed in solution, while in a film incorporation of an increased amount of LiI/I2 leads to a disturbance of the aggregates. At temperatures up to 100 °C the porphyrazine - LiI/I2 complexes are stable in the liquid phase, but from 115 °C onwards, small crystallites of LiI are formed in the isotropic liquid.
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