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.

Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?

Strong Closed-Shell Interactions in Inorganic Chemistry.

Advances in copper complexes as anticancer agents.

Polymeric materials with antimicrobial activity

The challenge of cyclic and acyclic schiff bases and related derivatives

Abstract The present review covers almost 100 polymeric MFe (M=Li, Na, K, Rb, and Cs) compounds. The metal atoms of group 1 as partners with iron atom build up complex polymeric chains. The iron atoms are found in the oxidation states 0, +2, and +3, of which the oxidation state +3 prevails. The coordination number of the iron atom ranges from 2 to 10 (sandwiched). The coordination sphere about the main group 1 metals varies, ranging from tetrahedral to mostly trigonal bipyramid. There are also higher coordination numbers involved, namely, from 6 to 10. The most common ligand atoms are oxygen and nitrogen. There are three compounds displaying distortion isomerism. Several relationships between structural parameters are found and discussed.

Analysis of crystallographic and structural data of polymeric iron-alkaline metal complexes

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Synthesis and Structural Characterisation of High-Spin cis-Bis(acetonitrile) Tetrakis(triphenylphosphine oxide)iron(II) Triiodide‒Acetonitrile(1/1)

ESR studies of dimeric copper(II) carboxylate complexes of the type Cu(CH3COO)2L.2H2O and Cu(CH3CH2COO)2L with the biologically important ligand L = nicotinamide are reported. The spectra show features corresponding to dimeric copper(II) complexes, and which at low temperatures are well resolved. Seven lines from hyperfine splitting Az2 (high-field side) and six of seven lines from hyperfine splitting Az1 (low-field side) are found. The observed resonances are used to calculate the zero-field splitting parameters D and E. Spin-Hamiltonian and zero-field splitting parameters are used to estimate the antiferromagnetic interaction; for Cu(CH3CH2COO)2L.2H2O-2J = 320 cm−1 and for Cu(CH3CH2COO)2L - 2J = 332 cm−1.

Esr spectra of dimeric copper(ii) carboxylato complexes with the biologically important ligand nicotinamide

Abstract This review covers almost 350 four-coordinated monomeric organoplatinum complexes with PtC2AB, PtA2BC and PtABCD compositions, and there is wide variability of chromophores. The most common ligands in addition to the C donor are PPh3 and chlorine. Platinum(II) is found only in a square-planar environment involving cis- as well as trans-configurations with a different degree of distortion, especially when bi- or terdentate ligands are present. The trans-effect decreases in the order of the atoms in which the effect dominates, H>C>P>Si>S. There are at least two types of isomerism, cis-trans and distortion. The data strongly suggest that distortion isomerism is, for platinum chemistry, more common than cis- and trans-isomerism.

Platinum organometallic compounds: classification and analysis of crystallographic and structural data. Monomeric Pt compounds with PtC2AB, PtA2BC and PtABCD compositions

Zinc(II) carboxyl­ates with O-, S- and N-donor ligands are inter­esting for their structural features, as well as for their anti­bacterial and anti­fungal activities. The one-dimensional zinc(II) coordination complex catena-poly[[bis­(2,4-di­chloro­benzoato-κO)zinc(II)]-μ-isonicotinamide-κ2N1:O], [Zn(C7H3Cl2O2)2(C6H6N2O)]n, has been prepared and characterized by IR spectroscopy, single-crystal X-ray analysis and thermal analysis. The tetra­hedral ZnO3N coordination about the ZnII cation is built up by the N atom of the pyridine ring, an O atom of the carbonyl group of the isonicotinamide ligand and two O atoms of two di­chloro­benzoate ligands. Isonicotinamide serves as a bridge between tetra­hedra, with a Zn⋯Zn distance of 8.8161 (7) A. Additionally, π–π inter­actions between the planar benzene rings contribute to the stabilization of the extended structure. The structure is also stabilized by inter­molecular hydrogen bonds between the amino and carboxyl­ate groups of the ligands, forming a two-dimensional network. During thermal decomposition of the complex, isonicotinamide, di­chloro­benzene and carbon dioxide were evolved. The final solid product of the thermal decomposition heated up to 1173 K was metallic zinc.

Synthesis, crystal structure, and spectroscopic and thermal properties of the polymeric compound catena-poly[[bis(2,4-dichlorobenzoato)zinc(II)]-μ-isonicotinamide].

Milan Melnik

Papers

Analysis of crystallographic and structural data of polymeric iron-alkaline metal complexes

Synthesis and Structural Characterisation of High-Spin cis-Bis(acetonitrile) Tetrakis(triphenylphosphine oxide)iron(II) Triiodide‒Acetonitrile(1/1)

Esr spectra of dimeric copper(ii) carboxylato complexes with the biologically important ligand nicotinamide

Platinum organometallic compounds: classification and analysis of crystallographic and structural data. Monomeric Pt compounds with PtC2AB, PtA2BC and PtABCD compositions

Synthesis, crystal structure, and spectroscopic and thermal properties of the polymeric compound catena-poly[[bis(2,4-dichlorobenzoato)zinc(II)]-μ-isonicotinamide].