Chiral exciton coupling of merocyanine dyes within a well defined hydrogen-bonded assembly

Prins, Leonard J. and Thalacker, Christoph and Würthner, Frank and Timmerman, Peter and Reinhoudt, David N. (2001) Chiral exciton coupling of merocyanine dyes within a well defined hydrogen-bonded assembly. Proceedings of the National Academy of Sciences of the United States of America, PNAS, 98 (18). pp. 10042-10045. ISSN 0027-8424

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Abstract:	Multichromophoric hydrogen-bonded assemblies 13⋅(BAR)6 are studied that bear a remarkably close resemblance to commelinin, a naturally occurring assembly responsible for an intense blue color of flowers. The incorporated chromophores exhibit a hypsochromic shift in the UV/visible (Vis) absorption maximum (Δ λmax = 14 nm) compared with the free chromophores. In addition, the chiroptical properties of incorporated chromophores can be rationally controlled by changing the supramolecular chirality of the assembly. These properties have been used to study the stability of this type of assembly with UV and CD spectroscopy at concentrations far below the NMR sensitivity threshold (10−4 M). The determined C50% values of 2–3 μM in benzene show the extremely high stability of these hydrogen-bonded assemblies.
Item Type:	Article
Copyright:	© 2010 by the National Academy of Sciences
Faculty:	Science and Technology (TNW)
Research Group:	Supramolecular Chemistry and Technology (SMCT)
Link to this item:	http://purl.utwente.nl/publications/36756
Official URL:	http://dx.doi.org/10.1073/pnas.171131398
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