Objective: The present study is designed to investigate the interaction of titanium dioxide nanoparticle (TiO2NPs) with human serum albumin (HSA) using spectroscopic techniques. Methods: TiO2NPs was characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS) and Fourier transform infrared (FTIR) spectroscopy. Effect of NPs on the conformation of HSA was evaluated by ...

We report here computed spin-state energies and UV-Vis spectra for several transition metal complexes with a triazacyclononane ligand. Our results show that the spin ground-state is correctly obtained with either OPBE or SSB-D, except for the high-spin ground-state of the Co(ii) complex that was properly described only by SSB-D. The UV-Vis spectra from TD-DFT reproduce in general rather well th...

Dicoronylene Isomers, UV/VIS Absorption Spectra, Fluorescence Spectra The non-alternant hydrocarbon cyclopenta[l,2-a:3,4,5-b'c']dicoronene (3) has been pre­ pared by aluminium chloride catalyzed dimerization o f coronene (1). The UV/VIS absorption spectrum, fluorescence spectrum and fluorescence quantum yield o f 3 is reported and com ­ pared with that o f the alternant isomer benzo[l,2,3-bc:4,...

ÖZ E T Bu çalışmada tetrazolyum tuzları ve formazanların yapıları tanımlanmıştır. Ayrıca formazan-tetrazolyum sistemlerinin önemi ve kullanım alanları açıklanmıştır. Formazanların sahip oldukları conjugate p-system kaynaklanan tautomerleşme özellikleri ve geometrik izomerleri incelenmiştir. Bu bileşiklerin en yaygın kullanılan sentezleri ve yapılarının açıklanmasında önemli olan UV-visible, IR ...

Purpose: The purpose of this study is to assess molecular interactions between several anticancer drugs and an iodinated contrast medium by Fourier transform infrared spectroscopy (FT-IR) and ultravioletvisible spectroscopy (UV-Vis). Materials and Methods: Iopamidol (IPM) was used as an iodinated contrast medium, and mitomycin C (MMC), epirubicin hydrochloride (EPI), cisplatin (CDDP), 5-fluorou...

In order to elucidate the uranium solution chemistry at the high HNO(3) concentrations typically employed for the reprocessing of spent nuclear fuels, speciation and complex structures of U(IV) and U(VI) are studied in aqueous HNO(3) solutions, as well as in HClO(4) solutions, by means of UV-visible-near-infrared and X-ray absorption spectroscopies and density functional theory calculations. In...

In situ diffuse reflectance UV-visible spectroscopy was used to measure the dynamics of catalyst reduction and oxidation during propane oxidative dehydrogenation (ODH) on VOx/gamma-Al2O3. Transients in UV-visible intensity in the near-edge region were analyzed using a mechanistic model of ODH reactions. Rate constants per site for the kinetically relevant reduction step (C-H bond activation) me...

Two copper(II)-ACC complexes were prepared and characterized: [Cu(bpy)(ACC)(H(2)O)]CO(4) (1) and [Cu(ACC)(2)](3).4H(2)O (2). Their crystallographic structures are described and analyzed. Spectroscopic characterizations (UV-visible and EPR) confirm that the structure is maintained in solution. These complexes are able to produce ethylene in the presence of hydrogen peroxide in an "ACC Oxidase-li...

2-(o-Hydroxyphenyl)-1,8-naphthyridine (HN), 2-(4-hydroxy-6-methylpyran-2-one-3-yl)-1,8-naphthyridine (HMPN) and 2-(benzimidazol-2-yl)-1,8-naphthyridine(BN) react with acetates of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) to yield metal ion complexes of definite composition. These compounds were characterized by elemental analyses, molar conductivity, magnetic susceptibility measurements, therma...