Lanthanide (III) complexes of 3-(ethylthio)phenyl-substituted phthalocyanines: Synthesis and physicochemical properties was written by Dubinina, Tatiana V.;Tychinsky, Pavel I.;Borisova, Nataliya E.;Krasovskii, Vitaly I.;Ivanov, Anton S.;Savilov, Serguei V.;Maklakov, Sergey S.;Sedova, Marina V.;Tomilova, Larisa G.. And the article was included in Dyes and Pigments in 2018.Name: Pyridinehydrochloride This article mentions the following:
Novel phthalocyaninates of terbium, erbium and lutetium, bearing 3-(ethylthio)phenyl peripheral groups, were synthesized with high yields. The complexes obtained were characterized by 1H NMR spectroscopy, FTIR spectroscopy and high-resolution mass spectrometry. Thermal stability of the lanthanide complexes was examined using TGA combined with FTIR spectroscopy. Strong upfield (up to -59.06) and downfield (up to 22.32) lanthanide-induced shifts of signals of aromatic protons were observed in NMR spectra of terbium and erbium complexes, resp. It was shown, that comparing to phenyl-substituted analogs the introduction of ethylthio-moieties in the meta-positions of Ph substituents does not affect the Q band maxima. Hybrid gold nanoparticles coated with mols. of the lutetium complex were obtained and their optical properties were studied. The formation of phthalocyanine shell and its composition were proven using at. force and TEM. Absorption cross sections of ground and the first excited states were calculated using the data of open-aperture z-scan measurements for lutetium complex and hybrid gold nanoparticles on its basis. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Name: Pyridinehydrochloride).
Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Name: Pyridinehydrochloride