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Two-photon-absorption (TPA) triggered photochemistry is a versatile tool to photochemically release compounds in an uncaging reaction where the desired reaction should occur behind an UV absorbing barrier, e.g. as in intraocular lenses (IOLs). Nonlinear effects of the UV-absorbing barrier, in this case the cornea, are negligible as long as the laser light passes through it at an intensity low enough...
Electron-deficient (dibenzoylmethanato)boron difluoride (DBMBF2) can efficiently discriminate between electron-rich polynuclear aromatic hydrocarbons like naphthalene (A1), anthracene (A2) or phenanthrene (A3). Even using the same sort of electron donor–acceptor (EDA) interaction, DBMBF2, can recognise different polar polynuclear aromatic systems containing indeno-pyridine groups (I1–I3). EDA Interaction...
Compact layer preventing the charge recombination has much attention in studies on efficiency enhancement of dye-sensitized solar cells (DSCs). Especially, the charge recombination at the interface between transparent conductive oxide (TCO) and an electrolyte plays an important role due to bad contact of TCO/TiO 2 interface. Although TiO 2 has been widely adopted as a source of the...
Photophysical properties and the ultrafast excited state torsional dynamics of an amyloid fibril sensing dye, Thioflavin-T, have been investigated in Triton X-100 reverse micelle as a function of water content. This study has been undertaken to comprehend the effect of interfacial charge on the ultrafast torsional dynamics of Thioflavin-T in nanoconfined reverse micellar system. The emission intensity...
Energy transfer between a CdSe/ZnS nanocrystal (NC) donor and a rhodamine isothiocyanate (RITC) acceptor has been achieved via a functionalized poly(acrylic acid) (PAA) encapsulating layer over the surface of the NC. The modification of PAA with both N-octylamine (OA) and 5-amino-1-pentanol (AP) [PAA–OA–AP], allows for the simultaneous water-solubilization and functionalization of the NCs, underscoring...
We report on the study of some physical properties of Cu 2 S and their effects toward the photoactivity of the Cu 2 S/TiO 2 heterojunction. Transport properties of Cu 2 S, i.e. thermoelectric power and electrical conductivity were studied and correlated to the photoelectrochemical characterization to establish the energetic diagram of the Cu 2 S/TiO 2 ...
A new class of supported photocatalysts is introduced recently with high activity under visible light for water splitting purposes. The composition comprises silicoaluminates (zeolite) as the support, titanium dioxide (TiO 2 ) as the semiconductor, cobalt ions (Co 2+ ) as the hydrogen evolution sites and heteropolyacid (HPA) as the multifunctional solid acid with visible light activity...
Spectroscopic and theoretical techniques were used to examine the effects of adsorption solvents and electrolyte additives on the photovoltaic performance of dye sensitized solar cells of two β-substituted zinc porphyrin analogues (A1-H and A1-M), where A1-M has an added methyl group at the phenyl ring attached to the meso-position of the porphyrin macrocycle. These results showed that the different...
In this paper a new formulation based on a two state model (pseudophase model) is presented. This formulation explains the results obtained in the quenching of *[Ru(bpy) 3 ] 2+ by S 2 O 82− in α-cyclodextrin solutions. The quenching of the excited state of the ruthenium complex by another quencher, [Co(NH 3 ) 5 pz] 3+ (pz=pyrazine), is also...
The efficiencies of homogeneous and heterogeneous photo-Fenton oxidation were compared for treatment of azo dye containing synthetic textile wastewater. The influence of parameters such as the presence of NaCl and starch was evaluated and optimal iron and H 2 O 2 dosage determined. Complete decolorization of Remazol Red RR was achieved at all investigated NaCl and starch concentration...
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