Structure and mercaptan oxidation activity of cobalt(II) phthalocyanines covalently bonded to silica of low surface area

Symmetrical and difunctional substituted cobalt phthalocyanines with benzoic acids fragments: Synthesis and catalytic activity

“…Valent vibration of Ar-O-Ar bond in range of 1245-1254 cm -1 is registered in IR spectrum of compound 2 that is in agreement with known data [20]. 13 C NMR spectra of all studied compounds have signals of carbon atoms on 167-168 ppm, which, in accordance with theoretically calculated spectra (Table 1) and known literature [21], have to be attributed to the carbon atoms of the carboxyl groups. Besides, there are signals of cyano carbon atoms on 109-115 ppm and on 107-115 and 120-126 ppm is cyano-substituted carbon atoms.…”

“…The yields of 2-4 compounds were 34-63%. Composition and structure of nitriles (2)(3)(4) were confirmed by elemental analysis, 1 H and 13 C NMR and IR spectroscopies, mass-spectrometry. IR spectra of all phthalonitriles have the band of cyanogroups valent vibrations in range of 2227-2237 cm -1 [20].…”

“…Carbon residues of phthalocyanine molecule may be used as anchoring groups for linking with biological molecules containing fragments of primary amines [11], immobilization on polymer surface, for example silica [12] or nanotubes [13] that may be used to create novel materials for purposes mentioned above. Thus, investigations of phthalocyanine macrocycle structure expansion are actively continuing at the moment [14,15].…”

The Surface Modification of the Polypropylene by Aqueous Soluble CoII Phthalocyanine to Obtain Materials for Catalysis

“…[15][16][17][18][19][20] This mechanism can be represented by the following scheme of elementary stages known from the literature: [6,7,19,41,42] …”

“…[12][13][14] Processes of self-association of metal phthalocyanines in aqueous and nonaqueous media affect their catalytic properties ambiguously. According to coordination mechanism of catalytic oxidation of RSH, shown in works, [2,[15][16][17][18] association of phthalocyanine catalyst reduces its activity significantly due to the limitations on access to the central metal cation of the oxygen molecules and the substrate. However, in the case of realization of associative mechanism of catalysis, association of metallophthalocyanines may both increase catalyst's activity due to the interaction of the dimer with the substrate and reduce it.…”