silver nanoparticles are increasingly used in various fields of biotechnology and applications in the medicine. objectives of this study were optimization of production of silver nanoparticles using biotransformations by fusarium oxysporum, and a further study on the location of nanoparticles synthesis in this microorganism. the reaction mixture contained the following ingredients (final concen...

.ABSTRAC'. The solubility and heat of solution of oxygen in n-decane and t *trakis(diinethylainino)ethylane (TMAE) have been measured and found to be almost equal. The spectrally measurable Interaction species, TiMAE-Ü2 and w-C;o22~2» are shown to have very low AH of formation (-1.2 and -0.4 kcal.). ThuF, in nonpolar media the good electron donor TMAE and poor electron donor n-decane react simi...

Unfunctionalized graphene is positively or negatively charged when it is dispersed in organic solvents. The charging is negative in solvents with high electron donor numbers and positive in those with low donor numbers. We suggest that the charging originates from electron transfer between graphene surfaces and solvent molecules, and the stable dispersion of unfunctionalized graphene in organic...

The co-adsorption of trinitrotoluene (TNT), a typical π-electron acceptor, and triphenylene (TP), a typical π-electron donor, on a Au(111) surface was investigated by in situ Electrochemical Scanning Tunneling Microscopy (ECSTM). DFT calculations proved that parallelly stacked and well-overlapped TP and TNT molecules can form Donor-Acceptor dyads through intermolecular π-π charge transfer, whic...

For the natural donor of photosynthetic photosystem II an operational model is postulated. This model combines a definite structural pattern of two types of electron donors (octahedral arrange­ ment of 6 secondary donors around a primary donor) with conformational state dependent electron transfer probability. It is shown that the model provides an explanation of many experimental data, especia...

For the natural donor of photosynthetic photosystem II an operational model is postulated. This model combines a definite structural pattern of two types of electron donors (octahedral arrange­ ment of 6 secondary donors around a primary donor) with conformational state dependent electron transfer probability. It is shown that the model provides an explanation of many experimental data, especia...

We present a theory of nonequilibrium long range charge transfer between donor and acceptor centers in a model polymer mediated by magnetic exciton (Kondo) bound states. Our model produces electron tunneling lengths easily exceeding 10 A, as observed recently in DNA and organic charge transfer systems. This long ranged tunneling is effective for weak to intermediate donor-bridge coupling, and i...

Two thioacetyl-terminated ferrocene-anthraquinone donor-acceptor molecules with different pi-electron conjugative units have been synthesized via a series of Stille and Sonagashira reactions. Their photochemical and electrochemical properties before and after addition of an organic acid are investigated, indicating that these complexes are sensitive to external perturbation of protonation, lead...

The generation of sulfonyl radicals has long been known as a flexible strategy in wide range different sulfonylative transformations. Meanwhile their use alkylation processes somehow limited due to inherent difficulty evolving less-stable after sulfur dioxide extrusion. Herein we report convenient that involves gem-difluorinated sulfinates an “upgrading-mask”, allowing these precursors decompos...

We describe a model of electron transfer reactions affected by local binding to the donor or acceptor sites of a particle in equilibrium with the solution. The statistics of fluctuations of the donor–acceptor energy gap caused by binding/unbinding events are non-Gaussian, and the resulting free energy surfaces of electron transfer are non-parabolic. The band-width of the charge-transfer optical...