Some studies in inorganic complexes. XX. Further reactions of 2-thioaminopyridine

1966 ◽  
Vol 19 (11) ◽  
pp. 2059 ◽  
Author(s):  
GJ Sutton
Keyword(s):  
Magnetic Susceptibility ◽  
Nitrogen Atom ◽  
Absorption Spectra ◽  
Infrared Spectra ◽  
Visible Region ◽  
Metal Chelates ◽  
Sulphur Atom ◽  
Inorganic Complexes

The following complexes of 2-thioamidopyridine (thiopic) were prepared and studied : [RhCl2 thiopic2]Cl,2H2O; [RhCl2 thiopic2][RhCl4 thiopic]; [RhCl, thiopic2]ClO4; [RhBr2 thiopic2]ClO4; [RhI2 thiopic2]ClO4,H2O; [Rh thiopic3][ClO4]3; [Ag thiopic]ClO4; [AuCl2 thiopic][AuCl4]; [Au thiopic2][AuI2]; [RuCl2 thiopic2], C2H5OH; [Os thiopic3]Br3; [Cr thiopic3]Br3; [MnI3 thiopic2]; [In thiopic3]Cl3,H2O. The following substances were also prepared and studied: [RhI2 pic2]I2,H2O; [RhCl, en,]Cl,H2O; [Rh phenan3]Br3 (where pic is 2-aminomethylpyridine, en is ethylenediamine, and phenan is 1,10-phenanthroline). The conductances of all of the aforementioned substances in NN?-dimethylformamide agreed with their structures as metal chelates as indicated. Studies of absorption spectra in the visible region were also made, and infrared spectra showed that bonding had occurred through the sulphur atom of the -C(=S)NH, group in the case of rhodium(III), gold(I), gold(III), ruthenium(II), osmium(III), and silver(I) complexes, whereas with chromium(III), manganese(II), and indium(III) coordination was by the nitrogen atom. Measurements of magnetic susceptibility showed that the rhodium(III), gold(I), gold(III), ruthenium(II), and osmium(III) complexes were spin-paired, whereas those of chromium(III) and manganese(II) were spin free.

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.

Some studies in inorganic complexes. XXV. Cobalt(II) and nickel(II) complexes of 2-Acetamidopyridine and 2-Aminomethyl-6-rnethylpyridine, and the cobalt(II) complex of 2-Methylpyridine-6-carboxylic acid

1969 ◽  
Vol 22 (9) ◽  
pp. 1841 ◽  
Author(s):  
KH Shaw ◽  
GJ Sutton
Keyword(s):  
Magnetic Properties ◽  
Carboxylic Acid ◽  
Absorption Spectra ◽  
Infrared Spectra ◽  
Reflectance Spectra ◽  
Inorganic Complexes

Complexes of cobalt(II) and nickel(II) with the ligands 2- acetamidopyridine (acpy) and 2-aminomethyl-6-methylpyridine (mepic) have been prepared and studied. They included [Co(acpy)2X2], [Co(mepic)2X2], [Ni(acpy)2X2], and [Ni-(mepic)2X2], in which X is Cl, Br, I, or NCS; [Co(acpy)2(NO3)2], [Co(mepic)2(NO3)2], [Ni(acpy)2(NO3)2], [Ni(mepic)3NO3]NO3, [Co(acpy)3](ClO4)2, [Co(mepic)3](ClO4)2, [Co(mepic)3](CoCl4), [Ni(acpy)2(H2O)2](ClO4)2, and [Ni(mepic)2(H2O)2](ClO4)2. The inner complex of 2-methylpyridine-6- carboxylic acid [Co(mepiac)2,2H2O)] was also isolated. In all cases, the magnetic properties, conductances, reflectance spectra, absorption spectra, and infrared spectra are in agreement with the concept that they are spin-free, six-coordinate octahedral complexes. The substance [Ni(mepic)2NO3]NO3 contains both bidentate and ionic nitrate.

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.

scholarly journals On the fluorescence and channelled absorption of bismuth at high temperatures

1925 ◽  
Vol 107 (744) ◽  
pp. 760-762 ◽  
Keyword(s):  
Fine Structure ◽  
Absorption Spectra ◽  
High Temperatures ◽  
Royal Society ◽  
Visible Region ◽  
Compressed Air ◽  
Orange Yellow ◽  
Fluorescent Radiation ◽  
Absorption Chamber

In a paper recently communicated to the Royal Society, experiments dealing with the absorption spectra of several metals were described, in which it was found that bismuth vapour shows both lines and bands in absorption. The banded spectrum consists of three groups of bands, each group consisting of a number of bands degraded towards the red, the group of bands in the visible region appearing at high temperatures. In the above experiments it was hoped that by raising the temperature of the absorption chamber sufficiently high, and raising the absorption in the lines of the several bands, it might be possible to detect a fine structure in some of these bands. Accordingly, the author modified the furnace previously used so as to blow through it a larger quantity of compressed air, and succeeded finally by using coke and this furnace to obtain a temperature of about 1500°C. to 1600°C. At this temperature the vapour emitted a fluorescent radiation orange yellow in colour.

Correlation of Magnetic Susceptibility and Infrared Spectra of FeF2

1968 ◽  
Vol 39 (2) ◽  
pp. 1141-1142 ◽  
Author(s):  
J. W. Stout ◽  
M. I. Steinfeld ◽  
M. Yuzuri
Keyword(s):  
Magnetic Susceptibility ◽  
Infrared Spectra

PYRIDINE N-OXIDE COMPLEXES OF ZIRCONYL, THORIUM, AND URANYL PERCHLORATES

1964 ◽  
Vol 42 (4) ◽  
pp. 856-860 ◽  
Author(s):  
P. Rama Murthy ◽  
C. C. Patel
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Visible Region ◽  
Lone Pair ◽  
Vibrational Structure ◽  
Uranyl Complexes ◽  
Bond Character

Pyridine N-oxide complexes having the composition ZrO(Py•O)6(ClO4)2, Th(Py•O)8(ClO4)4, and UO2(Py•O)5(ClO4)2 have been prepared. The infrared and electronic absorption spectra show that the bonding between the metal and pyridine N-oxide in the complexes has occurred by donation of the lone pair of p-electrons on oxygen to the metal, and that the π-bond character of NO group increases in the complexes as uranyl < thorium < zirconyl. The decrease in the vibrational structure of the UO22+ spectrum in the visible region indicates strong coordination of pyridine N-oxide to the uranyl group. The decomposition temperatures of zirconyl, thorium, and uranyl complexes are 307, 350, and 319 °C respectively.

Influence of Electron Injection Rate in Triphenylamine Based Dye for Dye-Sensitized Solar Cells: A First Principle Study

2019 ◽  
Vol 233 (9) ◽  
pp. 1247-1259
Author(s):  
Madhu Prakasam
Keyword(s):  
Solar Cells ◽  
Absorption Spectra ◽  
Density Functional ◽  
Dye Sensitized Solar Cells ◽  
Visible Region ◽  
Electron Injection ◽  
Injection Rate ◽  
Visible Absorption ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Abstract In this work, we systematically investigate the impacts of electron-donor based on Triphenylamine (TPA). The Geometry structure, energy levels, light-harvesting ability and ultraviolet-visible absorption spectra were calculated by using Density Functional Theory (DFT) and Time-Dependent-DFT. The electron injection rate of the TPA-N(CH3)2 based dyes has 0.71 eV for high among the dye sensitizer. The First and Second order Hyperpolarizability of the 11.95 × 10−30 e.s.u and 12195.54 a.u, respectively for TPA-N(CH3)2 based dye. The calculated absorption spectra were showed in the ultra-violet visible region for power conversion region. The study reveals that the electron transfer character of TPA-N(CH3)2 based dyes can be made suitable for applications in Dye-Sensitized Solar Cells.

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