Journal
TETRAHEDRON LETTERS
Volume 57, Issue 1, Pages 48-52Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2015.11.057
Keywords
Chlorophylls; Coordination; Dendrimers; Self-assembly; Supramolecular chemistry
Categories
Funding
- JSPS KAKENHI [24550163]
- MEXT Strategic Research Foundation at Private Universities
- JSPS for the Research Fellowship for Young Scientists
- Grants-in-Aid for Scientific Research [24550163, 26810102, 14J00020] Funding Source: KAKEN
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The first dendrimers consisting of self-assembled zinc chlorophyll derivatives are reported. Coordination-directed self-assembly of pyridine-appended zinc chlorophyll derivatives tethering a dendron moiety results in cyclic tetramers peripherally functionalized by dendrons via intermolecular axial coordination interaction between the nitrogen atom in the pyridine ring and the zinc atom in the chlorin ring. We characterized the formation of the cyclic tetramers by use of H-1 NMR measurements including diffusion-ordered spectroscopy (DOSY). Four different types of dendrons were introduced in the zinc chlorophyll component to investigate the tolerance of the self-assembly to the dendron structure. All dendrimers exhibited similar stabilities, which demonstrates that the dendron moiety does not interfere with the self-assembly, such that more than 90% of the molecules are in the assembly at concentrations >0.2 mM in benzene. (C) 2015 Elsevier Ltd. All rights reserved.
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