Sulfonated octa‐substituted Co(II) phthalocyanines immobilized on silica matrix as catalyst for Thiuram E synthesis

Abstract

Silica nanoparticles were obtained during the work according to two different sol–gel methods. In first one Schtrober's technique and series of cobalt phthalocyanine metal complexes varying in peripheral substituents were used. Second method was performed using the same complexes but differed in applying surface‐active substance (SAS) and two precursors – tetraethoxysilane (TEOS) and aminopropyltrimethoxysilane (APTMOS). All obtained hybrid materials were analyzed via SEM, the size of single particle was studied, which in all cases was about 200 nm. In order to investigate hybrid's characteristics laser diffraction and liquid nitrogen adsorption methods were applied. Distinction in pore's specific volume of differently‐obtained nanoparticles was found. Catalytic activity of all obtained materials were tested in conversion of N,N‐diethylcarbamodithiolate to thiuram E. Effect of peripherally substituted phthalocyanines and morphology of matrixes were manifested on catalytic activity of the hybrids.

Chemistry of Liquid Systems and Functional Materials Based on Coordination Compounds of Linear and Cyclic Polypyrroles

“…Безусловно, кроме органичсеких полимеров тетрапиррольные макрогетроциклические соединения могут быть успешно закреплены и на поверхности неорганичсеких материалов [131][132][133][134][135][136]. Так при иммобилизации ряда сульфокислот на поверхность органомодифицированного диоксида кремния было показано, что эффективность катализа окисления RSH такими материалами уменьшается в ряду остаточного концевого фрагмента полимерной матрицы -NH2 < -SН ≤ -OH < -Cl и хорошо согласуется с координирующей способностью катиона кобальта по отношению к данным группам [131][132][133][134][135][136]. Кроме процессов окислительного сочетания тиолов в дисульфиды интересными представляются процессы гидрогенизации, где неорганические носители могут вы-ступать в качестве эффективных подложек для катализаторов.…”

Synthetic Tuning of CoII-Doped Silica Nanoarchitecture Towards Electrochemical Sensing Ability

“…Stöber and water-in-oil microemulsion (w/o) techniques provide a facile approach for encapsulation of charged metal complexes into silica nanoparticles [2,9,[14][15][16][38][39][40]. The use of the both techniques results in the synthesis of the hybrid silica nanoparticles.…”

“…The labile d-metal complexes, including those of Ni II and Co II , can also be doped into silica nanoparticles, although their ligand environment scarcely remains unchanged after the doping [14,15]. Moreover, literature data introduce both works reporting on safe doping of the Co II complexes [2,9] and those revealing complex formation of Co II ions with Si-O − -groups as the reason for the ligand substitution [41]. The mutual impacts of electrostatic attraction of the complexes or coordinative bonding of Co II ions with Si-O − -groups to the doping procedure can be recognized by comparative structural analysis of the Co II -dopants inside silica spheres.…”

“…Silica nanoparticles provide a good platform for uploading of metal ions and complexes through different synthetic approaches, including doping into silica matrix or deposition at a surface of nanoparticles [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Such hybrid silica nanoparticles uploaded by transition d-metal ions exhibit electrochemical behavior controlled by both inner-sphere environments of the metal ions and nano-architecture of the nanoparticles [ 14 , 15 , 17 , 18 ].…”