Silver/tungsten oxide multi-layer films are deposited over quartz substrates by RF magnetron sputtering technique and the films are annealed at temperatures 200, 400 and 600 °C. The effect of thermal annealing on the phase evolution of silver tungstate phase in Ag/WO3 films is studied extensive...

Luminescent materials of different emission colors are of great interest for development of new or more efficient optical devices. Although many materials have been reported using different approach, green synthesis and nanosized rare earth doped phosphors of high color rendering is still very l...

A series of new silicon(IV) phthalocyanines (SiPcs) di-substituted axially with different nucleoside moieties have been synthesized and evaluated for their singlet oxygen quantum yields (ΦΔ) and in vitro photodynamic activities. The adenosine-substituted SiPc shows a lower photosensitizing eff...

Enthalpies of solution of tin(IV) iodide and of germanium(IV) iodide are reported for a variety of polar and non-polar solvents. Correlations with Gutmann donor numbers and enthalpies of vaporisation are discussed. Solubilities of tin(IV) iodide and of germanium(IV) iodide are reported in a rang...

A series of silicon(IV) phthalocyanines axially substituted with methylparaben, ethylparaben, propylparaben and butylparaben groups were synthesized and studied as photosensitizers for antimicrobial photodynamic therapy. The absorption, fluorescence, photodegradation and singlet oxygen generatio...

Silver iodide nanowires have been grown within tubular J-aggregates of the cyanine dye 3,3′-bis(2-sulfopropyl)-5,5′,6,6′-tetrachloro-1,1′-dioctylbenzimida-carbo-cyanine (C8S3) from aqueous AgNO3 solutions. Crystal structure analysis by selected area electron diffraction (SAED), high resoluti...

A series of hexacoordinate bis(bipyridyl)silicon(IV) complexes was synthesized by allowing [Si(bpy)2I2]I2 to react with the alcohols or phenols: methanol, ethylene glycol, phenol, 2,2′-biphenol, or 1,2-benzendiol. Crystal structures were obtained for the corresponding complexes: [Si(bpy)2(OMe)2...

Axially di-(alpha,alpha-diphenyl-4-pyridylmethoxy) silicon(IV) phthalocyanine (3) and its quaternized derivative (3Q) were synthesized and tested as photosensitizers against tumor and bacterial cells. These new phthalocyanines were characterized by elemental analysis, and different spectroscopic...

In this study, axially 1-acetylpiperazine substituted silicon (IV) phthalocyanine, naphthalocyanine 2, 3 and their water soluble derivatives 2a, 3a were synthesized for the first time and their DNA binding modes (absorption spectral, thermal denaturation and electrophoresis studies), DNA cleavag...

The photodynamic inactivation of both Gram-positive and Gram-negative bacteria by polycationic silicon (IV) phthalocyanine photosensitizers bearing eight N-methylated pyridyloxy substituents in their periphery and different silyl ether moieties (OSi(iBu), OSi(nBu)3 and OSiPh3) at their axial pos...

A series of novel symmetric or unsymmetric silicon (IV) phthalocyanines axially substituted with cyclic Arg-Gly-Asp (cRGD) ligands through different ethylene glycol chains have been synthesized by a facile and mild “click” reaction. All the compounds show efficient photosensitizing activities ...

Hole-selective contacts have been extensively studied in recent years due to their low-cost by low temperature processing (

The infrared and Raman spectra of liquid Si2Cl6 combined with accurate polarization measurements eliminate the high barrier staggered D3d structural model and favor the D3h or D3h' models for this molecule. The eleven active fundamentals for the D3h or the D3h' point groups were locate...

Hexachlorodisilane decomposes according to the equation nSi2Cl6 = nSiCl4 + (SiCl2)n when heated with catalytic quantities of triphenylphosphine or triphenylarsine. No reaction occurs with tristrifluoromethylphosphine. Hexabromodisilane is similarly decomposed by trimethylamine. Hexachlorodisilan...

The infrared spectra of 1,1,1-trifluoropropyl trifluorosilane were recorded in the vapour, amorphous and crystalline solid phases in the range 4000–50 cm−1. Additional MIR spectra of the compound isolated in argon and nitrogen matrices at 5 K before and after annealing to temperatures in the ra...

The infrared spectra of 2-chloroethyl trifluorosilane (ClCH2CH2SiF3) were recorded in the vapour, amorphous and crystalline solid phases in the range 4000–50 cm−1. Spectra of the compound isolated in argon and nitrogen matrices at 10 K and variable temperature spectra in liquified xenon were ob...

The infrared (3500–40 cm−1) spectra of gaseous and solid and the Raman spectrum (3500–30 cm−1) of liquid and solid cyclobutyl trifluorosilane, c-C4H7SiF3, have been recorded. From the Raman spectrum of the liquid qualitative depolarization values have been obtained. Both the axial and equatori...

Infrared spectra of 2-chloroethyl trifluorosilane (CETFS) (ClCH2CH2SiF3) were obtained in the vapour, amorphous and crystalline solid phases in the range 4000–50 cm−1. Additional variable temperature spectra in liquefied xenon and spectra in argon and nitrogen matrices at 5 K were recorded. Ram...

The characteristics of (benzoyloxymethyl)trifluorosilane C6H5C(O)OCH2SiF3 containing a five-membered heterocycle closed by intramolecular coordination O → Si bond (Ia) and its most stable acyclic isomer (Ib) have been calculated by HF, MP2(Full) non-empirical methods, and DFT(B3LYP) using 6-311...

The effect of substituents at the silicon atom and in the side chain as well as those of the solvent and temperature on the strength of the intramolecular Si ← O bond in molecules of (aroyloxymethyl)trifluorosilanes and their analogs have been investigated by 1H, 19F and 29Si NMR spectroscopy. ...