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Porphyrin‐Containing Glycodendrimers
Author(s) -
Ballardini Roberto,
Colonna Barbara,
Gandolfi M. T.,
Kalovidouris Stacey A.,
Orzel Lukasz,
Raymo Françisco M.,
Stoddart J. Fraser
Publication year - 2003
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.200390031
Subject(s) - chemistry , dendrimer , porphyrin , mass spectrometry , fluorescence , spectroscopy , fluorescence spectroscopy , nuclear magnetic resonance spectroscopy , polymer chemistry , photochemistry , organic chemistry , chromatography , physics , quantum mechanics
Two dendrimers, incorporating tetrasubstituted porphyrin units as their cores and, in one case, four perbenzoylated and, in the other case, twelve peracetylated β‐ D ‐glucopyranosyl residues at their peripheries, have been synthesized in yields of 39 and 16%, respectively. The deprotection of these dendrimers was achieved quantitatively under Zemplén conditions. The protected and deprotected dendrimers were characterized by liquid secondary‐ion or matrix‐assisted laser desorption ionization time‐of‐flight mass spectrometry and by a combination of one‐ and two‐dimensional 1 H and 13 C NMR spectroscopy. All the glycodendrimers were also characterized by absorption and emission spectroscopy, and lifetime measurements. The most relevant result is that both protected and deprotected dendrimers show two fluorescence lifetime values that are different from the porphyrin model compounds. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)