ISMSC 2007 - Università degli Studi di Pavia

Self-Assembled Rosette Nanotubes with Increased Inner Diameter
Gabor Borzsonyi, Andrew Myles, and Hicham Fenniri*
Supramolecular Nanoscale Assembly Group, National Institute for Nanotechnology and
Department of Chemistry, University of Alberta, Edmonton, AB, Canada
PSA 23
Programmed self-assembly is a desirable method to construct nanoscale materials. Bicyclic
self-complementary DNA hybrid base G^C was previously shown to self-assemble into
hexameric rosette supermacrocycles, which stack on one another to form rosette nanotubes
(RNT’s) with an inner diameter 1.1 nm (Figure 1. A) 1 . We sought to increase the inner diameter
of the RNT’s by synthesizing tricyclic derivative XG^C (Figure 1. B). The synthesis and
characterization of the resulting expanded RNT’s will be presented.
[1] Fenniri, H.; Mathivanan, P.; Vidale, K. L.; Sherman, D. M.; Hallenga, K.; Wood, K. V.;
Stowell, J. G. J. Am. Chem. Soc. 2001, 123, 3854.
PSA 24
New fluorescent sulphonamides receptors for selective anion sensing
Claudia Caltagirone, Philip A. Gale, Mark E. Light
School of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
Selective sensing of anions is one of the most intensively-studied areas in supramolecular
chemistry due to its potential application in the areas of medicine and environmental sensing.
[1] Considerable efforts have been made to develop hydrogen-bonding donors/receptors
containing urea, thiourea, amide, and sulfonamide moieties. Our recent work shows that
receptors containing both bis-ureas based on an ortho-phenylenediamine scaffold and amides
as hydrogen donors are particularly good receptors for carboxylates.[2][3] We decided to
synthesise the new fluorescent receptors 1 and 2 containing the ortho-phenylenediamine
scaffold appended with one or two dansyl groups respectively as sulfonamide hydrogen donor
groups and investigate the fluorescent sensing properties of these systems. The results of these
studies will be presented in this poster.
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[1] J.L. Sessler, P.A. Gale and W.-S. Cho, Anion Receptor Chemistry, Ed. J.F. Stoddart, Royal
Society of Chemistry, Cambridge, 2006.
[2] S.J. Brooks, P.A. Gale, M.E. Light, Chem. Comm., 2006, 4344.; S. J. Brooks, P.A. Gale and
M.E. Light, Chem. Commun., 2005, 4696; S,J. Brooks, P,A. Gale and M,E. Light,
CrystEngComm, 2005, 7, 586.
[3] S.J. Brooks, S.E. Garcìa-Garrido, M.E. Light, P.A. Cole, P.A. Gale, Chem. Eur. J., 2007, 13,
3320.
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