Light‐Harvesting Nanotubes Formed by Supramolecular Assembly of Aromatic Oligophosphates

Abstract

A 2,7-disubstituted phosphodiester-linked phenanthrene trimer forms tubular structures in aqueous media. Chromophores are arranged in H-aggregates. Incorporation of small quantities of pyrene results in the development of light-harvesting nanotubes in which phenanthrenes act as antenna chromophores and pyrenes as energy acceptors. Energy collection is most efficient after excitation at the phenanthrene H-band. Fluorescence quantum yields up to 23 % are reached in pyrene doped, supramolecular nanotubes.

Silica Mineralization of DNA‐Inspired 1D and 2D Supramolecular Polymers

“…For this purpose, we took advantage of the supramolecular polymerization of short aromatic oligophosphates . These self‐assembled structures appear as one‐ or two‐dimensional objects sharing common structural features—a hydrophobic core of aromatic chromophores shielded from the aqueous environment by a network of negatively charged phosphates . Here, we propose a strategy to access fibrillar and planar hybrid materials from polyanionic supramolecular polymers.…”

Mesoscopic FRET Antenna Materials by Self‐Assembling Iridium(III) Complexes and BODIPY Dyes

“…[11] Aw ide variety of such supramolecular photosystems have been constructed via self-assembly through non-covalent interactions and include dendrimers, [12][13][14][15][16][17] organogels, [18][19][20] multiporphyrin arrays, [21,22] biomaterials [23][24][25][26] carbon-basedn anometric networks 27 and quantum dots dispersed in polymeric films. [28] Furthermore, polymers have been used as effective means to promotet he formation of self-organiseds tructures such as nanoparticles, [29,30] nanofibres [31] andn anotubes, [32] where organic dyes are able to perform directional energy transfer,a nd intra-and inter-chain migration has also been demonstrated. [33] One recent approach for designinge nergy conversion materials is to incorporate chromophores into channel-forming or porousi norganic and organic frameworks to produce supramolecular host-guestc ompounds (HGCs) which can act as arrays of optical antennae.…”

Light‐Harvesting Antennae using the Host–Guest Chemistry of Mesoporous Organosilica

“…[12] Polymers have also been used as effective means to promote the formation of self-organised structures such as fibers and nanotubes where organic dyes are able to perform directional energy transfer. [13] These examples however usually take place in (or at the interface of) as olution phase, increasing reorganization energies and decreasing conversion yields. Long-term chemical stability of such systems also tends to be inadequate fori ndustrialscale use.…”