Reading the bands: Amphiphilic pyrene trimers self-assemble into two-dimensional, supramolecular polymers in aqueous medium. Folding and aggregation processes are accompanied by simultaneous development of J- H-bands significant changes fluorescence properties. The formation sheet-like nano-structures is confirmed AFM.

Non-nucleosidic chromophores in the stem of a molecular beacon inhibit excimer fluorescence through formation donor–acceptor complex (see picture). The excellent reduction background allows detection DNA and RNA targets presence significant excess probe. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: publisher is responsible for...

Abstract The efficient collection of solar energy relies on the design and construction well‐organized light‐harvesting systems. Herein we report that supramolecular phenanthrene polymers doped with pyrene are effective collectors light energy. linear formed through assembly short amphiphilic oligomers in water. Absorption by residues is followed electronic transfer along polymer over long distances (>100 nm) to accepting molecules. high efficiency transfer, which documented large...

Aggregation-induced emission (AIE) was studied by hybridization of dialkynyl-tetraphenylethylene (DATPE) modified DNA strands. Molecular aggregation and fluorescence DATPEs are controlled duplex formation.

Non-nucleosidic, pyrene-derived base surrogates form excimers via interstrand stacking in duplex DNA.

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

Abstract The understanding and description of collectively excited multichromophores is crucial importance for many areas basic applied research. DNA has been used the construction well‐defined heterochromophoric stacks. Electronic coupling among non‐adjacent chromophores same type leads to co‐existence PDI pyrene H‐aggregates in hybrids composed alternating chromophore

An approach combining DNA nanoscaffolds with supramolecular polymers for the efficient and directional propagation of light-harvesting cascades has been developed. A series photonic wires different arrangements fluorophores in DNA-organized nanostructures were linked to phenanthrene (SPs) a self-assembled fashion. Among them, complex (LHC) composed SPs wire phenanthrene, Cy3, Cy5, Cy5.5 chromophores reveals remarkable energy transfer efficiency 59 %. Stepwise excitation collected by via...

The self‐assembly of two isomeric amphiphilic cholane‐phenanthrene‐cholane trimers and the light‐harvesting properties formed supramolecular assemblies in aqueous medium are presented. Distinct differences nanostructures were observed based on type phenanthrene isomer used, as well cooling rate applied during thermal process. A fast resulted formation 2D objects (nanosheets) with both trimers. In contrast, a slow process observation 3D objects, worm‐like for self‐assembled 3,6‐disubstituted...

A light-harvesting complex composed of a π-stacked multichromophoric array in DNA three-way junction is described. The modular design allows for ready exchange non-covalently attached energy acceptors.

Durch Selbstorganisation bilden amphiphile Pyrentrimere in wässrigem Medium zweidimensionale supramolekulare Polymere. Die Faltungs- und Aggregationsprozesse führen zur Ausbildung von J- H-Banden zu signifikanten Änderungen der Fluoreszenzeigenschaften. Bildung Nanoblatt-artigen Strukturen wird rasterkraftmikroskopisch belegt. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for...

Vesicle-shaped supramolecular polymers are formed by self-assembly of a DNA duplex containing phenanthrene overhangs at both ends. In the presence spermine, act as sticky ends linking duplexes together. aqueous solution, assembly leads to vesicles with diameter in range 50-200 nm. Fluorescence measurements show that assembled units light-harvesting complexes and transfer absorbed energy an acceptor, such pyrene or Cy3, which can either be directly added polymer attached via complementary...

Filling the gap. Abasic sites represent a frequently occurring lesion in DNA. If not repaired, such lesions can lead to mutations or cell death. Stabilization of DNA containing abasic is investigated as therapeutic approach for treatment cancer. Non-nucleosidic phenanthroline and pyrene derivatives were found have profound stabilizing effect (ΔTm=8 °C) on missing nucleobase. Supporting information this article available WWW under http://www.wiley-vch.de/contents/jc_2268/2005/z400370_s.pdf...

Double stranded DNA hybrids containing up to four consecutive, face-to-face stacked porphyrins are described. Non-nucleosidic, 5,15-bisphenyl-substituted porphyrin building blocks were incorporated into complementary oligonucleotide strands. Upon hybridization multiple well accommodated inside the scaffold without disturbing overall B-DNA structure. The formation of double strands free base is enabled compromising duplex stability. UV/vis, fluorescence, and CD spectroscopy demonstrate...

Oligonucleotides containing a phenanthrene-derived, non-nucleosidic building block with flexible linkers were synthesized. The effect of the phenanthrene moiety on duplex stability at different positions was investigated. Placement two residues in opposite had slightly positive stability. This further increased, when pairs juxtaposed. In contrast, introduction single unit to an adenosine or thymidine led destabilization duplex. A model phenanthrene-modified is proposed.

Abstract Das effiziente Sammeln von Sonnenenergie beruht auf dem Design und der Entwicklung präzise strukturierten lichtabsorbierenden Systemen. Wir beschreiben hier, dass supramolekulare, mit Pyren dotierte Phenanthrenpolymere Kollektoren Lichtenergie sind. Die linearen Polymere bilden sich durch geordnetes Zusammenfügen kurzer, amphiphiler Oligomere in wässrigem Medium. wird Phenanthrenbausteinen absorbiert über lange Distanzen (>100 nm) entlang zu den Pyren‐Akzeptormolekülen...

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

Stable stacking. DNA mimics have been prepared from simple, non-nucleosidic building blocks. These oligonucleotides, which contain extended stretches of phenanthrene derivatives, form stable hybrids. The residues contribute to the stability duplex through interstrand stacking interactions. hybrids adopt an overall B-form structure, thus mimicking natural DNA. Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2268/2005/z500366_s.pdf or...

The highly selective detection of homopurine target strands with a triplex-forming molecular probe is described. binding clamp-type oligonucleotide containing two terminally attached pyrene molecules to the sequence easily monitored through excimer formation. allows efficient discrimination single nucleotide mismatches because high mismatch sensitivity triplex Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2268/2007/z600378_s.pdf or from...

Abstract The understanding and description of collectively excited multichromophores is crucial importance for many areas basic applied research. DNA has been used the construction well‐defined heterochromophoric stacks. Electronic coupling among non‐adjacent chromophores same type leads to co‐existence PDI pyrene H‐aggregates in hybrids composed alternating chromophore

Proper interpretation of phenanthrene's and similar PAHs’ photocycle relies on two higher excited state relaxations due to the simultaneous presence non-adiabatic adiabatic transitions.

The self-assembly of DNA hybrids with tetraphenylethylene sticky ends into vesicular architectures is demonstrated.