Some Studies in Inorganic Complexes. VI. Nickel(II) with 2-Picolylamine

1960 ◽  
Vol 13 (1) ◽  
pp. 74 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Solid State ◽  
Absorption Spectra ◽  
Magnetic Measurements ◽  
Visible Spectrum ◽  
Ultraviolet Region ◽  
Near Ultraviolet ◽  
Chelating Ligand ◽  
Inorganic Complexes ◽  
Solvent Molecules

Complexes of the type Nipic2X2, Nipic3X2.nH2O, and Nipic3(ClO4)2.H2O have been prepared and studied, where X is Cl, Br, or I and pic is the chelating ligand 2-picolylamine. Conductance measurements in nitrobenzene, nitromethane, methanol, and water show that the blue compounds Nipic2X2, whilst being hexacovalent complexes in the solid state, are progressively ionized in the respective solvents as halogen is replaced by solvent molecules. Conductance measurements also verified a hexacovalent structure for the Ni pic32+ ion complex whose salts are bi-univalent electrolytes. Magnetic measurements show that a11 the complexes are paramagnetic with a mean moment of 3.0 B.M. Their absorption spectra in the near ultraviolet region are characteristic of that of the ligand. A study in the visible spectrum was also made.

Some Studies in Inorganic Complexes. XIV. Reactions of 2-Methyl-6-aminopyridine and 2-Thioamidopyridine with Some Transition Metal Ions

1963 ◽  
Vol 16 (3) ◽  
pp. 371 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Absorption Spectra ◽  
Copper Complexes ◽  
Transition Metal Ions ◽  
The Other ◽  
Ultraviolet Region ◽  
Chelating Ligands ◽  
Near Ultraviolet ◽  
Inorganic Complexes

The following complexes of the chelating ligands 2-methyl-6-aminomethylpyridine (6-methyl-2-picolylamine or mepic) and 2-thioamidopyridine (thiopic) have been prepared and studied: [Cu mepic2X]X, where X = Cl, Br, I, NO3, ClO4, [Cu mepic2C2O4], [Ni mepic3][ClO4]2, [M(II) thiopic3][ClO4]2, [M(III) thiopic3][ClO4]3, (M(II) = Co, Ni; M(III) = CO, Fe), and [Co thiopic3]Cl2. Conductance measurements in ethanol, nitromethane, and nitrobenzene indicate that the [Cu mepic2X]X complexes are 5-covalent whilst the other complexes studied are 6-covalent. All the complexes are "spin free" excepting those of Co(III). Absorption spectra of the copper complexes in the near ultraviolet region were also made.

Some studies in inorganic complexes. XXVI. Complexes of 6-Methyl-2-thioamidopyridine

1971 ◽  
Vol 24 (5) ◽  
pp. 919 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Infrared Spectra ◽  
Magnetic Measurements ◽  
Visible Spectrum ◽  
Sulphur Atom ◽  
Chelating Ligand ◽  
Inorganic Complexes

Several complexes of the chelating ligand 6-methyl-2-thioamidopyridine have been prepared end studied. Infrared spectra indicate that the sulphur atom of the thioamido group is bonding in the complexes: [CoL2(H2O)2][ClO4]2, [NiL2Br2], [CuL2]I, [Ru2L4Cl2O]Cl2, [OsL2Cl2], [AuL][AuCl1], and [HgLI2] whereas nitrogen bonding occurs with [FeLCl3]2, [ZnL3][ClO4]2, [SnLI4], and the deprotonated species [In(L-H)3]. Copper(II) was reduced to copper(I), e.g. [CuL2][CuBr2]. Studies in the visible spectrum, magnetic measurements, and conductances in both nitrobenzene and dimethylformamide were also made.

Polarized Crystal Absorption Spectra of Pd(II) and Pt(II) Tetrahalo and Tetrathiocyanato Complexes

1979 ◽  
Vol 34 (2) ◽  
pp. 211-219
Author(s):  
W. Tuszynski ◽  
G. Gliemann
Keyword(s):  
Single Crystal ◽  
Absorption Spectra ◽  
Theoretical Calculations ◽  
Electron Interaction ◽  
Ultraviolet Region ◽  
Ligand Field ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Near Ultraviolet ◽  
Spectral Assignment

Abstract Single crystal absorption spectra of tetrachloro, tetrabromo, and tetrathiocyanato complexes of Pd(II) and Pt(II) have been measured in the visible and near-ultraviolet region at temperatures between 10 K and 295 K. A spectral assignment of the observed d-d transitions based on ligand field theoretical calculations including electron-electron interaction and spin-orbit coupling is proposed which is consistent for all the systems investigated

Some studies in inorganic complexes. XVII. 2-Thioamidopyridine complexes of copper(I) and copper(II)

1964 ◽  
Vol 17 (12) ◽  
pp. 1360 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Copper Complexes ◽  
Magnetic Measurements ◽  
Chelating Ligand ◽  
Absorption Studies ◽  
Inorganic Complexes

The following copper complexes of the chelating ligand 2-thioamidopyridine (thiopic) have been prepared and studied: [Cuthiopic2][CuX2], where X = Cl, Rr, I, and SCN (two isomers); [Cuthiopic2]I; [Cuthiopic2ClO4].ClO4.H2O; [Cuthiopic2OH]ClO4; [Cuthiopic2NO3]NO3.H2O; [Cuthiopic2NO3]PF6.H2O; and [Cuthiopic2][PF6]2. 4H2O. Conductance measurements in nitrobenzene, nitromethane, and ethanol; and absorption studies in the infrared, visible, and ultraviolet regions of the spectrum were carried out and magnetic measurements were also determined.

Some Studies in Inorganic Complexes. VIII. Cobalt(II) and Cobalt(III) with 2-Picolylamine

1960 ◽  
Vol 13 (4) ◽  
pp. 473 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Magnetic Susceptibility ◽  
Absorption Spectra ◽  
Visible Region ◽  
Cobalt Atom ◽  
Octahedral Complex ◽  
Solution Stability ◽  
Chelating Ligand ◽  
Inorganic Complexes

Complexes of cobalt(II) and (III) with the chelating ligand 2-picolylamine have been prepared and studied. Those of cobalt(II) are Copic3(ClO4)2 and CopicI2.2H2O, where pic is the ligand 2-picolylamine. Measurements of magnetic susceptibility have shown that in both of these the cobalt atom is spin-free, giving rise to momenta of 4.8 and 4.9B.M. respectively. By means of conductance measurements in water, methanol, nitromethane, and nitrobenzene, it has been shown that the former is an octahedral complex and the latter, whilst probably octahedral, could be tetrahedral. The cobalt(III) complexes described include [Copic3](ClO4)3, [Copic2Cl2]Cl.HCl, [Copic2Cl2]Cl, [Copic2(NO2)2]NO3.�H2O, [Copic2(NO2)2]NO2, and [Copic2(H2O)2](ClO4)2. By means of the above measurements it has been shown that all the latter are diamagnetic octahedral complexes. A study of absorption spectra in the visible region, in the above solvents where possible, has also been made and the results correlated to solution stability. Attempts to resolve the Copic33+ complex into its enantiomorphs were unsuccessful.

Electronic absorption spectra and π-electron structure of 2-propenylidene-1,2-dihydropyridine and its derivatives

1979 ◽  
Vol 44 (3) ◽  
pp. 884-894 ◽  
Author(s):  
Josef Kuthan ◽  
Dušan Ilavský ◽  
Jiří Krechl
Keyword(s):  
Absorption Spectra ◽  
Satisfactory Agreement ◽  
Electronic Absorption ◽  
Heterocyclic System ◽  
Electronic Absorption Spectra ◽  
Electron Structure ◽  
Ultraviolet Region ◽  
Near Ultraviolet ◽  
Experimental Absorption

The results of the PPP calculations of the singlet-singlet transitions of 1-methyl-3'-cyano-3'-alkoxycarbonyl-2-propenylidene-1,2-dihydropyridines II and 1-methyl-4-amino-3,3'-dicyano-3',5-di(methoxycarbonyl)-2-propenylidene-1,2-dihydropyridine (III) are in a satisfactory agreement with the experimental absorption curves in the visible and near ultraviolet region. Based on this finding, the absorption of the parent heterocyclic system of 2-propenylidene-1,2-dihydropyridine (I) is predicted. Some aspects of the π-electron structure of the substances I-III in the S0, S1 S2 and states are discussed.

Some Studies in Inorganic Complexes. XII. Manganese(II) and Iron(II) with 2-Aminomethylpyridine (2-Picolylamine)

1961 ◽  
Vol 14 (4) ◽  
pp. 550 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Magnetic Susceptibility ◽  
Metal Atom ◽  
Manganese Complexes ◽  
Ultraviolet Region ◽  
Coordinate Structure ◽  
Near Ultraviolet ◽  
Metal Atoms ◽  
Inorganic Complexes ◽  
Free Metal ◽  
Iron And Manganese

Almost colourless complexes of the type [MnpicCl2], [Mnpic2X2], [Mnpic3]I2 and [Mnpic3][ClO4]2, as well as the brown complexes [Fepic3]Br2 and [Fepic3]I2 have been prepared and studied ; pic being the chelating ligand 2-picolylamine (2-aminomethyl-pyridine) and X the halogen. Conductance and absorption spectroscopy in the near-ultraviolet region measurements, using nitromethane as solvent, indicate that all complexes investigated have a 6-coordinate structure, excepting the chloride [MnpicCl2], the structure of which is uncertain. The latter substance could be tetrahedral or octahedral by polymerization. This substance as well as the bischelate complexes behave as non-electrolytes in nitromethane, although they are ionized to bi-univalent electrolytes in methanol. The complexes containing three molecules of ligand to metal atom are bi-univalent electrolytes in both solvents. Measurements of magnetic susceptibility show that both the iron and manganese complexes have spin-free metal atoms.

Electronic-Transitions in the Near-Ultraviolet Spectra of Uracil, Thymine, Uridylyl(3'-5')uridine and Thymidylyl(3'-5')thymidine

1988 ◽  
Vol 41 (10) ◽  
pp. 1509 ◽  
Author(s):  
KE Connell ◽  
T Kurucsev ◽  
B Norden
Keyword(s):  
Energy Transfer ◽  
Absorption Spectra ◽  
Energy Transition ◽  
Electronic Transitions ◽  
Ultraviolet Region ◽  
Transfer Rates ◽  
Exciton Coupling ◽  
Low Intensity ◽  
Near Ultraviolet ◽  
Exciton Interactions

The absorption spectra in the near-ultraviolet region of uracil and thymine, and of their derivatives may be deconvoluted into two vibronic progressions; the higher-energy progression has a relatively low intensity. The corresponding component spectra coincide with the two separate transitions manifested in the circular dichroism of the relevant nucleoside derivatives. A series of apparent contradictions may be resolved by the assumption that the higher-energy transition in absorption is a vibronically allowed (π*,n) transition. This interpretation is further supported by an analysis of the spectra of uridylyl (3′-5′) uridine and thimidylyl (3′-5′) thymidine in terms of exciton interactions. The magnitude of exciton coupling in the dinucleoside phosphates is found to be small but significant in terms of energy transfer rates.

An Infrared Microscope for Use on a Focused Ion Beam for Circuit Edit and Backside Edit Applications

2015 ◽  
Author(s):  
Alexander Richards ◽  
Matthew Weschler ◽  
Michael Durller
Keyword(s):  
Focused Ion Beam ◽  
Near Infrared ◽  
Ion Beam ◽  
Visible Spectrum ◽  
Camera System ◽  
Buried Structures ◽  
Ir Camera ◽  
Area Of Interest ◽  
Near Ultraviolet ◽  
Infrared Microscope

Abstract To help solve the navigational problem, i.e., being able to successfully locate a circuit for probing or editing without destroying chip functionality, a near-infrared (NIR), near-ultraviolet (NUV), and visible spectrum camera system was developed that attaches to most focused ion beam (FIB) or scanning electron microscope vacuum chambers. This paper reviews the details of the design and implementation of the NIR/NUV camera system, as instantiated upon the FEI FIB 200, with a particular focus on its use for the visualization of buried structures, and also for non-destructive real time area of interest location and end point detection. It specifically considers the use of the micro-optical camera system for its benefit in assisting with frontside and backside circuit edit, as well as other typical FIB milling activities. The quality of the image obtained by the IR camera rivals or exceeds traditional optical based imaging microscopy techniques.

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