In this research new adsorbents were prepared by modification of surfactant-coated g-alumina with three ligands; 1-(2-pyridylazo)-2-naphtol (PAN), dithizone (HDZ) and dimetyl golyoxime (DMG). The adsorbents were used for removal and pre-concentration of Pb+2, Cd+2, Ni+2, Cu+2, Co+2. Aqueous solutions of the me...

The electronic properties of colloidal quantum dots (QDs) are critically dependent on both QD size and surface chemistry. Modification of quantum confinement provides control of the QD bandgap, while ligand-induced surface dipoles present a hitherto underutilized means of control over the absolute energy levels of QDs within electronic devices. Here, we show that the energy levels of lead sulfi...

Band edge positions of semiconductors determine their functionality in many optoelectronic applications such as photovoltaics, photoelectrochemical cells and light emitting diodes. Here we show that band edge positions of lead sulfide (PbS) colloidal semiconductor nanocrystals, specifically quantum dots (QDs), can be tuned over 2.0 eV through surface chemistry modification. We achieved this rem...

A huge variety of types cancer makes it necessary to search for new effective drugs with a defined molecular target. Modification substituents in ligands based on 3-hydroxy-1,1-cyclobutanedicarboxylic acid are one the directions design better version carboplatin. In present study, we combined molecule derivative 3-hydroxycyclobutane-1,1-dicarboxylic and N-methylpyrazole as carrier ligand. The a...

Molecular cages with arylboronate ester caps at the vertices are described. The were obtained by metal-templated polycondensation reactions of a tris(2-formylpyridine oxime) ligand arylboronic acids. Suited templates triflate or triflimide salts ZnII, FeII, CoII, MnII. In products, metal ions coordinated internally to pyridyl and oximato N atoms adjacent boronate ester, resulting in an improved...

The thiolate-for-thiolate ligand exchange was performed on well-defined gold nanoparticles under an inert atmosphere without any modification of the core size. This reaction is faster than the well-known core etching. Surprisingly, if a chiral thiol is exchanged for its opposite enantiomer, the optical activity in the metal-based electronic transitions is reversed although the form of the CD sp...

A number of new solvates and adducts containing bisphenyldimethylaminophosphine oxide is reported. The solvates have the general formula M [ (C6H5) 2P (O) N (CH3) 2 ] 4 2 + (anion") 2 , in which M = Mg, Ca, Mn, Fe, Co, Ni, Cu, Zn and Cd, and the anions are C104~ and BF4". The adducts have the general formula M [ (C8H5) 2P (O) N (CHS) 2 ] 2C12 , where M stands for the same series of metals. The ...

sulfur mustard (sm, bis- (2-chloroethyl) sulphide) is a chemical warfare agent that causes dna alkylation, protein modification and membrane damage. sm can trigger several molecular pathways involved in inflammation and oxidative stress, which cause cell necrosis and apoptosis, and loss of cells integrity and function. epigenetic regulation of gene expression is a growing research topic and is ...