The spectrophotometric method was used to determine the mechanism of chiral interactions between a known chiral selector, tert-butyl carbamoylated quinine (t-BuCQN), and N-derivative amino acids (DNB-Leu). Results obtained on binding constants, free energy of binding (DeltaG), and difference in free energy of binding (DeltaDeltaG) values seem to suggest that there are three possible types of in...

the fabrication of a non-doped red organic light-emitting device (oled) has been developed using naturally occurring curcumin as an emissive layer of oled. in this research, the electroluminescent spectrum (el) of curcumin as a donor-acceptor-donor (d-a-d) chromophore was obtained at wavelength of 612 nm. also, the maximum external quantum efficiencies (eqe) for this device was measured and fou...

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...

where t is time and 0(t) is the fluorescence decay function after a sudden excitation at time t = 0. Recently [1] we discussed the influence of excitation energy migration among donors on MFDT of donor molecules in a donor-acceptor system. Assuming that the interaction between an excited donor molecule and a non-excited donor or acceptor molecule (trap) is of dipole-dipole type [2], we obtained...

In this paper, the electronic eigenstates and energy spectra of single and two-interacting electrons confined in a concentric double quantum rings with a perpendicular magnetic field in the presence of         on-center donor and acceptor impurities are calculated using the exact diagonalization method. For a single electron case, the binding energy of on-center donor and acceptor impurities ar...

We report selectively plasmon-mediated nonradiative energy transfer between quantum dot (QD) emitters interacting with each other via Förster-type resonance energy transfer (FRET) under controlled plasmon coupling either to only the donor QDs (i.e., donor-selective) or to only the acceptor QDs (i.e., acceptor-selective). Using layer-by-layer assembled colloidal QD nanocrystal solids with metal ...

The synthesis and characterisation of a novel coumarin donor-perylene bisimide acceptor light-harvesting system is reported, in which an energy-transfer efficiency of >99% is achieved. Comparison of the excited-state properties of the donor-acceptor system with model compounds revealed that although the photophysical properties of the perylene bisimide acceptor unit are affected considerably by...

Abstract Resonant interaction between excitonic transitions of molecules and localized electromagnetic field forms the hybrid polaritonic states. Tuneable microresonators may change light-matter coupling strength modulate them from weak to strong ultra-strong regimes. In this work we have realised tuneable open-access cavity mode in oligonucleotide-based molecular beacons with their terminus la...

This work utilizes the advantages produced when combining aggregation-induced emission in aqueous medium with macrocyclic amphiphiles that can noncovalently incorporate donor/acceptor pairs. A novel FRET system was assembled by using tetraphenylethylene-functionalized cucurbit[7]uril (TPE-Q[7]) as a amphiphile platform imparting energy transfer, tetraphenylethylene (TPE) donor luminophore, and ...