Toward a Facile One-Step Construction of Quantum Dots Containing Zn₈S Cores

Three neutral nanoclusters Zn8S(SC6H5)14L2 [L = 3-aminopyridine (1), 4-(dimethylamino)pyridine (2), 4-methylpyridine (3)] featuring a wurtzite-like core have been assembled by a controlled one-step hydrothermal reaction. Their detailed photoluminescence properties depend upon the ligand substituents. Cluster 1 exhibited a narrow, symmetric emission spectrum and has a potential application as a fluorescence quantum dot

Toward a Facile One-Step Construction of Quantum Dots Containing Zn₈S Cores

Three neutral nanoclusters Zn8S(SC6H5)14L2 [L = 3-aminopyridine (1), 4-(dimethylamino)pyridine (2), 4-methylpyridine (3)] featuring a wurtzite-like core have been assembled by a controlled one-step hydrothermal reaction. Their detailed photoluminescence properties depend upon the ligand substituents. Cluster 1 exhibited a narrow, symmetric emission spectrum and has a potential application as a fluorescence quantum dot

Observation of Intermolecular Charge Transfer in a Quasi-One-Dimensional Molecular Alloy System

X-band single-crystal electron paramagnetic resonance (EPR) studies of the molecular alloy [NO2BzPy][Au0.57Ni0.43(mnt)2] are presented in this paper. At room temperature, EPR spectra show both intense resonance signals (main signals) and weak satellite quartet lines. The characteristics of both intense and weak EPR signals depend on the magnetic field orientation. The main signals arise from two magnetically nonequivalent [Ni(mnt)2]− anions, and their corresponding principal values of the g tensor are (gx′)1 = 2.04653, (gy′)1 = 2.00096, and (gz′)1 = 2.15319 and (gx′)2 = 2.04520, (gy′)2 = 1.99734, and (gz′)2 = 2.15361, respectively. The weak satellite lines, whose patterns strongly depend on the magnetic field direction, can be attributed to the hyperfine coupling of the electron spin with the 197Au nucleus of the [Au(mnt)2]− species. Density functional theory calculations for the spin and charge distributions of the dimer {[Ni(mnt)2][Au(mnt)2]}2− indicate that the hyperfine interaction of the electron spin with the 197Au nuclear spins is caused, in part, by the charge transfer between the [Ni(mnt)2]− and the [Au(mnt)2]− species

Observation of Intermolecular Charge Transfer in a Quasi-One-Dimensional Molecular Alloy System

X-band single-crystal electron paramagnetic resonance (EPR) studies of the molecular alloy [NO2BzPy][Au0.57Ni0.43(mnt)2] are presented in this paper. At room temperature, EPR spectra show both intense resonance signals (main signals) and weak satellite quartet lines. The characteristics of both intense and weak EPR signals depend on the magnetic field orientation. The main signals arise from two magnetically nonequivalent [Ni(mnt)2]− anions, and their corresponding principal values of the g tensor are (gx′)1 = 2.04653, (gy′)1 = 2.00096, and (gz′)1 = 2.15319 and (gx′)2 = 2.04520, (gy′)2 = 1.99734, and (gz′)2 = 2.15361, respectively. The weak satellite lines, whose patterns strongly depend on the magnetic field direction, can be attributed to the hyperfine coupling of the electron spin with the 197Au nucleus of the [Au(mnt)2]− species. Density functional theory calculations for the spin and charge distributions of the dimer {[Ni(mnt)2][Au(mnt)2]}2− indicate that the hyperfine interaction of the electron spin with the 197Au nuclear spins is caused, in part, by the charge transfer between the [Ni(mnt)2]− and the [Au(mnt)2]− species

Observation of in Situ Ligand Reactions during the Assembly of Crystalline Zn−S Clusters

Six new neutral crystalline clusters Zn8S(SC6H5)14L2 [L = pyridyl (1), 3-(phenylthio)pyridyl (2), 4-(phenylthio)pyridyl (3), 3-iodopyridyl (4), 3-butylpyridyl (5), and phenanthridyl (6)] with Zn8S cores have been assembled by a hydrothermal process. Exceptionally, in situ ligand reactions have been observed in clusters 2 and 3. There are no detectable fluorescence emissions of complexes 1−5, whereas 6 shows an emission peak at 365 nm due to the existence of terminal phenanthridyl ligands

Structural Influence of Cations on the Topology of Ferrocenemonosulfonate Salts

The structures of salts containing the ferrocenemonosulfonate anion and a range of nitrogen base cations are reported. It is found that electrostatic interactions, sometimes enhanced by hydrogen bonds, generally lead to layer-type structures with the sulfonate group playing a key role in the association with the cations

Structural Influence of Cations on the Topology of Ferrocenemonosulfonate Salts

The structures of salts containing the ferrocenemonosulfonate anion and a range of nitrogen base cations are reported. It is found that electrostatic interactions, sometimes enhanced by hydrogen bonds, generally lead to layer-type structures with the sulfonate group playing a key role in the association with the cations

Combination of a Fluorescent Dye and a Zn−S Cluster and Its Biological Application as a Stain for Bacteria

An ionic-pair charge-transfer salt [C15H16N3]+[Zn8S(SC6H5)15·H2O]− (1) featuring a fluorescent dye and a wurtzite-like octanuclear Zn−S cluster shows high stability when staining bacteria Escherichia coli, Salmonella typhimurium, and Clostridium novyi NT

A Pillared Discrete Bilayer Formed from Guanidinium and Ferrocenedisulfonate Ions: Synthesis, Crystal Structure, and Initial Electrochemical Properties

The solid salt [C(NH2)3]2[Fe(η5-C5H4SO3)2] forms a two-dimensional network based upon pillared discrete bilayers formed via charge-assisted hydrogen bonds and is electrochemically active when adhered to a glassy carbon electrode

Observation of in Situ Ligand Reactions during the Assembly of Crystalline Zn−S Clusters

Six new neutral crystalline clusters Zn8S(SC6H5)14L2 [L = pyridyl (1), 3-(phenylthio)pyridyl (2), 4-(phenylthio)pyridyl (3), 3-iodopyridyl (4), 3-butylpyridyl (5), and phenanthridyl (6)] with Zn8S cores have been assembled by a hydrothermal process. Exceptionally, in situ ligand reactions have been observed in clusters 2 and 3. There are no detectable fluorescence emissions of complexes 1−5, whereas 6 shows an emission peak at 365 nm due to the existence of terminal phenanthridyl ligands