Tuning the self-assembly of a ditopic crown ether functionalized oligo(p-phenylenevinylene)

A chiral ditopic crown ether functionalized oligo(p-phenylenevinylene), COPV, has been synthesized and fully characterized. The binding properties and the organization of COPV have been studied in solution and in the solid state. In chloroform, due to the benzo-15-crown-5 moieties, COPV is able to b...

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Veröffentlicht in:Journal of materials chemistry 2007-01, Vol.17 (25), p.2654-2660
Hauptverfasser: JANSSEN, Pim G. A, JONKHEIJM, Pascal, THORDARSON, Pall, GIELEN, Jeroen C, CHRISTIANEN, Peter C. M, VAN DONGEN, Joost L. J, MEIJER, E. W, SCHENNING, Albertus P. H. J
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container_end_page 2660
container_issue 25
container_start_page 2654
container_title Journal of materials chemistry
container_volume 17
creator JANSSEN, Pim G. A
JONKHEIJM, Pascal
THORDARSON, Pall
GIELEN, Jeroen C
CHRISTIANEN, Peter C. M
VAN DONGEN, Joost L. J
MEIJER, E. W
SCHENNING, Albertus P. H. J
description A chiral ditopic crown ether functionalized oligo(p-phenylenevinylene), COPV, has been synthesized and fully characterized. The binding properties and the organization of COPV have been studied in solution and in the solid state. In chloroform, due to the benzo-15-crown-5 moieties, COPV is able to bind cations. In case of K+ a strong 2 : 2 complex is formed in which two COPVs are sandwiched between two potassium ions. Na+ is bound following a two-step negative cooperative process to form a 2 : 1 Na+/COPV complex. When COPV in the presence of potassium ions is drop-cast on a silicon substrate, fibers are formed. In water COPV forms stable helical aggregates as can be concluded from the Cotton effect, the UV-vis and fluorescence spectroscopy. AFM and light scattering studies show that ellipsoidal aggregates are present in water.
doi_str_mv 10.1039/b702298k
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source Royal Society of Chemistry Journals Archive (1841-2007); Royal Society Of Chemistry Journals 2008-
subjects Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Materials synthesis
materials processing
Physics
title Tuning the self-assembly of a ditopic crown ether functionalized oligo(p-phenylenevinylene)
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