Journal
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
Volume 24, Issue 5-7, Pages 802-808Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1088424619501839
Keywords
spermine porphyrin; self-assembly; synthesis; fluorescence spectroscopy; pK determination
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Funding
- University of Catania, Department of Chemical Sciences
- Italian Ministero della Istruzione, dell'Universita e della Ricerca (MIUR) PRIN [2017YJMPZN]
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We synthetized and characterized a mono spermine porphyrin derivative by NMR, UV-vis and fluorescence spectroscopy. The photophysical properties and the protonation equilibria of 5-(4-carboxyphenylspermine)-10,15,20-triphenylporphyrin have been investigated, showing that porphyrin does not aggregate in acidic solutions, differently from what occurs as soon as the core of the porphyrin is deprotonated. These aggregation processes have been detected by the rising of new fluorescence band and a significant splitting of the Soret band.
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