Molecules with ·NS as SC fragment, pyridine, pyrazine and triazine as FC and phenyl as EG are designed, the stability of triplet states for the molecule with pyridine as FC is the highest, and that for the molecule with pyrazine as FC is the lowest.
The molecular structures of these species are likely amphoteric molecules with a pyridine ring and a pyrrole ring (Fig. 3b).
This might be due to incomplete complexing of all Cd-xanthate molecules with two pyridines.
A remarkable feature of salens, not yet examined for salophenes, is their affinity to a variety of aromatic neutral molecules such as pyridine, pyridine N-oxide, isoquinoline and benzylamine [17], [18].
In 1974, it was first reported that an unusually strong enhanced Raman scattering signal occurred with pyridine molecules adsorbed on silver electrode surfaces that had been roughened electrochemically by oxidation-reduction cycles [2].
In all compounds (II-V) except compound (I), the carboxylic group of the respective acids (benzoic acid, 2-aminobenzoic acid, 3-chlorobenzoic acid and 4-nitrobenzoic acid) interacts with pyridine molecule in a linear fashion through N---H · · · O and O---H · · · N hydrogen bonds to form cyclic hydrogen-bonded motifs (heterosynthon).
According to our DFT calculations, the bands above 3,000 cm−1 are associated with the corresponding ν(CH) of the cyclopropyl and pyridine moieties, which is supported by the comparison with the vibrational spectra of other cyclopropyl and pyridine molecules with similar substitutions [20, 21].
The effect of interaction of electron donor ammonia and pyridine molecules with Co2+ sites on the properties of these Co2+ ions, as well as the effect of adsorbed NO on the properties of NH3 interacting with Co2+ has been followed in the present study.
The type and distribution of the acid sites on the support surfaces were examined using FTIR spectroscopy with pyridine as a probe molecule.
