Ligand-centered vibrational modes as a probe of molecular and electronic structure: Raman spectroscopy of cis-Fe(1,10-phenanthroline)2(NCS)2 and trans-Fe(pyridine)4(NCS)2 at variable temperature and pressure

Photoinduced Electron Transfer from ZrOCo Binuclear Light Absorber to Pyridine Elucidated by Transient Optical and Infrared Spectroscopy

“…The 403 nm maximum of the transient absorption is in agreement with literature reports according to which the π–π* transition of pyridine radical anion between 300 and 400 nm is shifted toward the long-wavelength end of this range when interacting with electron-rich, large metal centers such as Zr. − Furthermore, the ratio of 20:1 for the observed peak intensity of the 403 nm growth and the 500–650 nm bleach (Figure ) agrees reasonably well with reported extinction coefficients of pyridine radical anion of 2000 L mol –1 cm –1 and overlapping tetrahedral Co II d–d (200 L mol –1 cm –1 ) and Co III d–d (50 L mol –1 cm –1 ). , A conceivable alternative charge transfer process, namely hole transfer from transient Co III to pyridine, is ruled out by the observed simultaneous growth of the 403 nm intermediate and the bleach of Co II . The absence of hole transfer to pyridine is to be expected because pyridine is known to be exceptionally resistant to one-electron oxidation .…”

Molecular Tectonics: Grid and Porous Coordination Networks Based on Combinations of Iron Thiocyanate and Pyridyl Appended Derivatives of Tetrathiacalix[4]arene and Tetramercaptotetrathiacalix[4]arene

“…Fe II (NCS) 2 (Py) 4 was prepared following a described procedure. [26] Elemental analyses were performed by the Service de Microanalyses de la Fédération de Recherche Chimie, Université de Strasbourg, Strasbourg, France.…”

Synthesis, crystal structure, characterizations and magnetic study of a novel two-dimensional iron fluoride

“…According to the reviewer James Kincaid, the strong band, detected at 590 and 531 cm -1 can be ascribed to the presence of the stretching vibration of the inorganic group ν(FeF 6 ) [43]. Eventually, the stretching vibration of the metal ligand group ν(FeF 2 N 2 O 2 ) and ν(FeF 4 N 2 ) are related to these two strong peaks detected at 279 and 217 cm -1 [44,45]. Accordingly, the vibrational frequencies of the A future study by Raman, at different temperatures, will be realized to confirm the thermal phenomenon of our compound.…”