Effect of the content and type of binder on the strength of glass fiber paper

Проведено исследование композиционного материала на основе минерального волокна с использованием в качестве связующего полиядерных комплексов металлов. Новизной и особенностью данного исследования является использование в качестве связующего для композиционного материала на основе стеклянных волокон полиядерных комплексов титана. Добавление связующего на основе полиядерных комплексов в композицию целесообразно в интервале 5–30% от массы волокна. Исследованный композиционный материал с добавлением в качестве связующего полиядерных комплексов титана имеет прочностные характеристики при рН отлива 10 и 12 выше, чем у материалов с добавлением полиядерных комплексов алюминия и обладает достаточной технологической прочностью. Полиядерные комплексы титана можно использовать как перспективные связующие для композиционных фильтровальных материалов на основе стеклянных волокон. The study of composite material based on mineral fiber using polynuclear metal complexes as a binder was carried out. The novelty and feature of this study is the use of polynuclear complexes of titanium as a binder for a composite material based on glass fibers. Adding a binder based on polynuclear complexes to the composition is advisable in the range of 5-30% by weight of the fiber. The studied composite material with the addition of polynuclear complexes of titanium as a binder has strength characteristic at pH levels 10 and 12, higher, than that of materials with the addition of polynuclear complexes of aluminum and has sufficient technological strength. Polynuclear complexes of titanium can be used as promising binders for composite filter materials based on glass fibers.

Cathecol and Naphtol Groups in Salphen-Type Schiff Bases for the Preparation of Polynuclear Complexes

In this paper, we show a strategy to modify salphen-type Schiff base ligands with naphtol (SYML1) and pyrocathecol (2,3-dihydroxyphenyl) groups (SYML2), or a combination of both (ASYML). Each of these ligands can be used to obtain polynuclear metal complexes following two different strategies. One relies on using metals that are either too large for the N2O2 cavity or not fond of coordination number 4 and the other one relies on forcing the polynuclear species by adding functional groups to the hydroxybenzaldehayde in order to have extra coordination sites in the ligand. We report and characterize the mononuclear complexes SYML1-Cu and SYML1-Ce, along with the dinuclear complex SYML1-Fe and the tetranuclear species SYML2-Mn. The asymmetric ligand ASYML routinely hydrolyzes into the symmetric ligands in the reaction mixtures. SYML1-Fe displays a nearly linear Fe-O-Fe bridge with very strong antiferromagnetic coupling between the Fe(III) ions.

Effect of surface acidity of cyano-bridged polynuclear metal complexes on the catalytic activity for the hydrolysis of organophosphates

Heterogeneous catalysis of cyano-bridged polynuclear metal complexes was examined for the hydrolysis of toxic organophosphates. The surface acidity of cyano-bridged polynuclear metal complexes strongly effects on the catalytic activity.

Syntheses and Structures of Homodinuclear (Na–Na) and Heterodinuclear (Cu–Na, Cu–K) Metal Complexes

The study of polynuclear metal complexes has gained great recognition over the last decade owing to their fascinating topological structures, various properties, and potential applications as functional solid materials in luminescence, catalysis, and magnetic materials. A large number of heterodinuclear 3d–4f and 3d–3d′ complexes have been widely studied due to their functional applications. To our knowledge, structurally characterised heterodinuclear (3d–Na, 3d–K) and homodinuclear (Na–Na) metal complexes are rare. Three metal complexes, [CuIINaI(HL1)2(SbF6)]n (1), [CuIIKI(HL1)2(PF6)]n (2), and [Na2(H2L2)2] (3), were synthesised by two kinds of ligands, o-vanillin (HL1) and N,N′-ethylene-bis(3-methoxysalicylideneimine) (H2L2). The structures of heterodinuclear complexes 1 and 2 are both one-dimensional chain structures, including transition metal ions (CuII) and main group metal ions (NaI and KI). However, the complex 3, as a homodinuclear metal complex, only has one kind of centre, a NaI ion. The structures of complexes 1–3 were determined by single crystal X-ray crystallographic studies.