Author
Milan Melnik
Other affiliations: York University, Slovak University of Technology in Bratislava, Comenius University in Bratislava ...read more
Bio: Milan Melnik is an academic researcher from University of York. The author has contributed to research in topics: Copper & Crystal structure. The author has an hindex of 26, co-authored 219 publications receiving 2513 citations. Previous affiliations of Milan Melnik include York University & Slovak University of Technology in Bratislava.
Papers published on a yearly basis
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TL;DR: In this article, the synthesis and characterization of four new 2,6-dimethoxynicotinate (2,6-(MeO)2nic) copper(II) monomeric complexes are reported.
Abstract: Synthesis and characterization of four new 2,6-dimethoxynicotinate (2,6-(MeO)2nic) copper(II) monomeric complexes [Cu(2,6-(MeO)2nic)2(py)2] (py is pyridine), [Cu{2,6-(MeO)2nic}2(Etnic)2(H2O)] (Etnic is ethylnicotinate), [Cu{2,6-(MeO)2nic}2(Et2nia)2(H2O)2] (Et2nia is N,N-diethylnicotinamide) as well as of the polymeric complex [Cu{2,6-(MeO)2nic}2(ron)2] n (ron is ronicol) are reported. The characterizations were based on elemental analysis, infrared, electronic and EPR spectra. Crystal structures of two of the complexes have been determined. The copper(II) of [Cu{2,6-(MeO)2nic}2(py)2] has a distorted tetragonal-bipyramidal (4 + 2) coordination environment. Both 2,6-(MeO)2nic anions are asymmetrically chelating. The Cu(II) of [Cu{2,6-(MeO)2nic}2(Etnic)2(H2O)] is pentacoordinate in a slightly distorted tetragonal-pyramidal arrangement by two trans nitrogens, each of one Etnic, by two oxygens, each of the carboxyl group of one unidentate 2,6-(MeO)2nic and the axial position occupied by water at a longer dista...
7 citations
TL;DR: In this article, the synthesis and characterisation of Cu(niflumate)2 and 3-pyridylcarbnol (3-Pyrinol)2 is reported based on elemental analyses, electronic and EPR spectra and magnetic susceptibility measurements over a temperature range (4.2 to 295K).
Abstract: The synthesis and characterisation of Cu(niflumate)2 and Cu(niflumate)2(3-pyridylcarbnol)2 is reported. Characterisation of the compounds were based on elemental analyses, electronic and EPR spectra and magnetic susceptibility measurements over a temperature range (4.2 to 295K). ESR of powdered solids were typical for S = 1/2, with well resolved perpendicular and parallel hyperfine splitting. Magnetic susceptibilities obey the Curie-Weiss law. Both compounds have a probable polymeric structure with a pseudo-octahedral environment about the Cu(II) centre.
6 citations
TL;DR: Two bidentate-bridging propionate ligands connect two Zn II atoms forming a dimeric [Zn 2 (C 3 H 5 O 2 ) 4 (C 6 H 6 N 2 O) 4 ] complex as mentioned in this paper.
Abstract: Two bidentate-bridging propionate ligands connect two Zn II atoms [Zn-O(3) 2.040(8) and Zn― O(4)(-x, -y, -z) 2.059(4)A] forming a dimeric [Zn 2 (C 3 H 5 O 2 ) 4 (C 6 H 6 N 2 O) 4 ] complex. The coordination around each Zn II atom is trigonal bipyramidal. A monodentate propionate anion completes the trigonal basal plane [Zn―O(1) 2.072 (3) A] and two unidentate nicotinamide ligands occupy the apical positions [Zn―N(11) 2.192(5) and Zn―N(21) 2.174 (4) A] of the coordination sphere of each Zn II atom. The Zn...Zn distance is 3.900(1)A.
6 citations
TL;DR: In this paper, the title monomeric colourless zinc(II) complex, [Zn(C 3 H 5 O 2 ) 2 (CH 4 N 2 S) 2, was given.
Abstract: Zinc(II) propionate reacts with thiourea in water to form the title monomeric colourless zinc(II) complex, [Zn(C 3 H 5 O 2 ) 2 (CH 4 N 2 S) 2 ]. Two thiourea S atoms and two propionate O atoms form a distorted tetrahedron two propionate O atoms form a distorted tetrahedron around the Zn II atom with Zn-S bonds of 2.320 (1) and 2.341 (2) A and Zn-O bonds of 1.959 (3) and 1.988 (2) A. One carboxylate group forms two intermolecular hydrogen bonds to two different amino groups and these, together with other intermolecular hydrogen bonds, distort the tetrahedron
6 citations
TL;DR: The CuII center in the title compound, [C3H5O2]2(C7H8N2O2)2], is situated on an inversion center and has tetragonally distorted coordination as discussed by the authors.
Abstract: The CuII centre in the title compound, [Cu(C3H5O2)2(C7H8N2O2)2].0.25H2O, is situated on an inversion centre and has tetragonally distorted coordination. It is bonded in a trans-square-planar arrangement to the pyridyl N atoms of two methyl 3-pyridylcarbamate molecules [Cu—N1 2.025 (2) A] and one carboxylate O atom from each of two propionate anions [Cu—O1 1.955 (2) A]. The axial positions are occupied by the other propionate O atoms [Cu⋯O2 2.653 (2) A]. The propionate groups exhibit very small O1—Cu⋯O2 chelate angles of 54.23 (8)°.
6 citations
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TL;DR: A comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals, including a brief introduction to nucleation and growth within the context of metal Nanocrystal synthesis, followed by a discussion of the possible shapes that aMetal nanocrystal might take under different conditions.
Abstract: Nanocrystals are fundamental to modern science and technology. Mastery over the shape of a nanocrystal enables control of its properties and enhancement of its usefulness for a given application. Our aim is to present a comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals. We begin with a brief introduction to nucleation and growth within the context of metal nanocrystal synthesis, followed by a discussion of the possible shapes that a metal nanocrystal might take under different conditions. We then focus on a variety of experimental parameters that have been explored to manipulate the nucleation and growth of metal nanocrystals in solution-phase syntheses in an effort to generate specific shapes. We then elaborate on these approaches by selecting examples in which there is already reasonable understanding for the observed shape control or at least the protocols have proven to be reproducible and controllable. Finally, we highlight a number of applications that have been enabled and/or enhanced by the shape-controlled synthesis of metal nanocrystals. We conclude this article with personal perspectives on the directions toward which future research in this field might take.
4,927 citations
2,151 citations
1,256 citations
TL;DR: The state of the art in the field of antimicrobial polymeric systems during the last decade is described in this paper, where a classification of the different materials is carried out dividing basically those synthetic polymers that exhibit antimicrobial activity by themselves; those whose biocidal activity is conferred through their chemical modification; those that incorporate antimicrobial organic compounds with either low or high molecular weight; and those that involve the addition of active inorganic systems.
1,063 citations
TL;DR: In this article, the role of the shape of coordinating ligands and of different metal ions in directing the synthesis totally or preferentially towards mono-, di- or poly-nuclear entities is discussed.
871 citations