The electrochemical oxidation of iodic acid and lithium iodate to periodate, a powerful oxidation agent for dialdehyde carbohydrates, was investigated for various anode materials (viz. boron-doped diamond, lead and platinum). Galvanostatic electrolyses and voltammetric experiments were carried o...

A comprehensive review that summarizes the periodate oxidation contribution to the development of selective instrumental methods of micro-analysis in the fields of electrochemistry, spectrophotometry, luminometry, chromatography, as well as studies on successful fabrication of sensors or labelin...

Innovative antimicrobial materials are urgently needed to overcome the occurrence antibiotic-resistant bacteria infections. The current research article shows the preparation and characterization of a benign dicarboxylic cellulose/silver nanocomposite with an effective antimicrobial properties. ...

The research work presented herein was undertaken with a view to develop, characterize and highlight modified cotton fabrics that acquire durable antibacterial activity in concomitant with high metal sorption capacity. The development is based on reacting cotton cellulose previously oxidized by ...

Cellulose (Cel) nanofibrils (CNFs) produced by periodate oxidation of native cellulose fibers were functionalized with silver (Ag) nanoparticles (NPs) using Tollens' reaction. The morphology and chemical composition of the resulting Cel-Aghybrid nanofibrils were characterized using transmis...

The natural mineral chrysocolla (CuSiO3·2H2O) has been investigated in terms of thermally stimulated luminescence and EPR measurements. The glow curves for natural samples present three glow peaks at 190, 357 and 450°C. Pre annealed and subsequently irradiated samples give rise to four glow pe...

The heat capacity of natural dioptase has been measured between T = 6 K and T = 600 K by combined cryogenic-adiabatic and differential-scanning calorimetry. At T = 298.15 K, the standard molar heat capacity Cop, m and entropy Som for dioptase are (88.898±0.087)·R and (88.682±0.087)·R (for R ...

The rhombohedral (R3) compounds green dioptase, CuSiO3H2O, and black dioptase, CuSiO3, are both antiferromagnetic. Their Néel temperatures are respectively near 50 and 110 K. The magnetic structure of the anhydrous compound has been studied by powder neutron diffraction. The magnetic moment of ...

We present a synchrotron-based, single-crystal X-ray diffraction and Raman spectroscopy study of natural green dioptase (Cu6Si6O18·6H2O) up to ∼30 GPa at room temperature. The lattice parameters of dioptase exhibit continuous compression behavior up to ∼14.5 GPa, whereupon a structural transi...

A series of three platinum(II) bisphosphine complexes 1–3 [Pt(1-(SO2),8-(O)-nap)(PR3)2] (where R3 = Ph3, Ph2Me, Me2Ph) have been prepared by metathesis from cis-[Pt(PR3)2Cl2)] and the dilithium salt of 1,8-naphthosultone. The novel compounds were fully characterised by X-ray crystallography, mu...

Two triphenylphosphine derivatives, diethyl [4-(diphenylphosphanyl)benzyl]phosphonate (3a) and tetraethyl {[5-(diphenylphosphanyl)-1,3-phenylene]dimethylene}bis(phosphonate) (3b), and also the corresponding free acids 4a and 4b were prepared. These ligands were characterized by 1H, 13C and 31P N...

The reaction of the title complex 1 with excess diazomethane results in the exclusive insertion of a methylene group into the PtCl bond trans to the phosphine ligand, to give the chloromethyl complex 6. The reactions of 1 with the diphosphines, Ph2P(CH2)nPPh2(n=2, dppe, n=3, dppp), and with th...

The synthesis of some new palladium(II), platinum(II) and silver(I) complexes based on (Δ)- and (Λ)-1,2–bis-(1H-benzimidazol-2-yl)-1,2-ethanediol (Δ-H2bie and Λ-H2bie) enantiomers in the absence and presence of the N,N-chelates 2,2′-bipyridyl and 9,10-phenanthroline, and triphenylphosphine...

The microwave synthesis of a series of platinum(II) phosphine complexes is reported. The complexes dppePtCl2 (dppe = bis(diphenylphosphino)ethane), dpppPtCl2 (dppp = bis(diphenylphosphino)propane), dppmPtCl2 (dppm = bis(diphenylphosphino)methane) and cis-(Ph3P)2PtCl2 are synthesized from the rea...

trans-[Pt(μ-Cl)Cl(PPh3)]2 reacted with arylaldoximes in 1,2-dichloroethane to afford [PtCl2(PPh3){N(OH)CHAr}] (Ar = 3,4-dimethoxyphenyl, 1-naphthyl, 9-anthryl) where aldoxime ligands are N-coordinated to platinum. The obtained complexes are soluble in chlorinated solvents, where they afford equ...

Platinum complexes (trans-PtCl2L2) containing monophospha-crown ethers (L) were synthesised and used as catalyst precursors in asymmetric hydroformylation of styrene. Chemoselectivities of up to 90% toward aldehydes were obtained. The branched aldehyde (2-phenylpropanal) was slightly favoured fo...

The addition of triphenylphosphine sulfide (Ph3PS) to bis-sulfoxide platinum (II) complexes [Pt(Me2SO)2Cl2] and (−)-[Pt(Me-p-TolSO)2Cl2] yields mixed ligand complexes [Pt(Ph3PS)(Me2SO)Cl2] (1) and (−)-[Pt(Ph3PS)(Me-p-TolSO)Cl2] (2), which are effective catalysts for hydrosilylation reaction. The...

Since the first approval of cisplatin for cancer treatment in 1978, a lot of attempts have been carried out to characterize in detail its interactions with serum albumin, by far the most important and most abundant plasma protein. The state of the art of those studies was recapitulated by Kepple...

Cisplatin-based chemotherapeutic regimens are the most frequently used adjuvant treatments for many types of cancer. However, the development of chemoresistance to cisplatin results in treatment failure. Despite the significant developments in understanding the mechanisms of cisplatin resistance...

ObjectivesCisplatin is employed for chemotherapeutic purposes in several types of adult and pediatric cancer. However, side-effects including nephrotoxicity, ototoxicity, gastrointestinal effects and neuropathy restrict the use of the drug due to their adverse impacts on quality of life. This st...