Donor-acceptor strategy is employed for designing low band gap hetero-aromatic copolymers using an artificial intelligence mechanism, viz., particle swarm optimization. The investigated structures include hetero-aromatic donor moieties, viz., pyrrole, thiophene and furan in combination with carbonyl and dicyanomethylene acceptor groups. The electronic properties of all the possible donor and ac...

Organic LEDs that emit light in the short-wavelength infrared (SWIR) region, which spans 1–2 ?m are attractive for applications biosensors, biomedical imaging and spectroscopy, surveillance. However, fabrication of such devices with high radiance has not yet been achieved owing to an intrinsic limitation imposed by energy-gap law, leads extremely low emission efficiencies. Here, we report accep...

In the current study, a direct method was used to synthesize new series of charge-transfer complex compounds. Reaction different quinones with 3,4-selenadiazo benzophenone in 1:1 mole ratio by acetonitrile gave unique compound good yield. All compounds were characterized UV-Vis, FTIR, 1H-NMR, and 13C-NMR. The analysis findings agreed produced compound’s proposed chemical structures. molecular s...

In some donor-acceptor blends based on conjugated polymers, a pronounced charge-transfer complex (CTC) forms in the electronic ground state. In contrast to small-molecule donor-acceptor blends, the CTC concentration in polymer:acceptor solution can increase with the acceptor content in a threshold-like way. This threshold-like behavior was earlier attributed to the neighbor effect (NE) in the p...

A novel stable donor/acceptor-supported MnI-metallasilanone 3 was synthesized. The intramolecular silanone-MnI interaction induces a highly strained three-membered cyclic structure, leading to an exceptionally high reactivity of as donor/acceptor complex silanone. Indeed, metallasilanone readily reacts with various small molecules such H2 or ethylene gas in mild conditions.

We have carried out a comparative analysis of the sub-sequences of size six| ten at the (donor| acceptor) splice site regions of five different organisms. The frequency analysis of the unique sub-sequences at the donor and acceptor regions suggests that the distribution of their occurrence is approximately exponential. We have observed that the number of unique sub-sequences (occurring with dif...

shown by demonstrating that the overall rate of dextransucrase synthesis is independent of the concentration of 1,6-linked dextran acceptor if synthesis is continued for periods that are directly proportional to the amount of acceptor present. For example, in the presence of 1 mg of acceptor dextran, the rate of dextransucrase action measured over lOmin is identical with the rate measured over ...

Foerster Resonance energy transfer (FRET) is an effect, in which energy from an excited fluorescent molecule (donor) is transferred to another fluorescent molecule (acceptor) through a near-field interaction. FRET is strongly distance dependent and occurs within a range of around 5nm. By comparing fluorescent intensity of the donor and acceptor conformational changes in macromolecules within th...

A series of eight carbazole-cyanoacrylate based donor-acceptor dyes were studied. Within the series the influence of modifying the thiophene bridge, linking donor and acceptor and a change in the nature of the acceptor, from acid to ester, was explored. In this joint experimental and computational study we have used electronic absorbance and emission spectroscopies, Raman spectroscopy and compu...

A fluorescence resonance energy transfer pair consisting of a colloidal quantum dot donor and multiple organic fluorophores as acceptors is reported and the photophysics of the system is characterized. Most nanoparticle-based biosensors reported so far use the detection of specific changes of the donor/acceptor distance under the influence of analyte binding. Our nanoparticle design on the othe...