270
been well emphasized by dynamic light scattering (DLS), small-angle X-ray scattering (SAXS) and UV-Vis spectroscopy (Soroceanu et al. 2015). This characteristic
can improve specific behaviors or properties (such as biological or catalytic)
depending on the environment. Thus, the bis(2-hydroxyazomethine)s derived from
the siloxane diamine 1,3-bis(amino-phenylene-ester-methylene)tetramethyldisiloxane, with salicylaldehyde and especially with 5-chlorosalicylaldehyde showed a
remarkable biocidal activity (Zaltariov et al. 2013).
Copper complexes of Schiff bases derived from 1,3-bis(3-aminopropyl)tetramethyldisiloxane with differently substituted (2-hydroxy, 3,5-di-bromo, 5-nitro,
2-chloro) salicylaldehydes have been shown to have potential as antimicrobial
agents, as well as improvers for antioxidant activity of the spirulina extract, thus
being of interest for biotechnologies (Soroceanu et al. 2016). In particular, those
with electron withdrawing substituents (bromo, chlorine and nitro) to the aromatic
ring show high catalytic activity and selectivity in the aerobic oxidation of benzyl
alcohol to benzaldehyde mediated by the TEMPO radical, under mild conditions
(Soroceanu et al. 2013). The tetranuclear copper complex of the siloxane derivative
obtained by [2 + 2] condensation of 1,3-bis(aminopropyl)tetramethyldisiloxane and
2,6-diformyl-4-methylphenol have proved suitable as catalyst precursors for the
hydrocarboxylation of a linear C5-C8 variety (n-pentane, n-hexane, n-heptane and
n-octane) and cyclic (cyclopentane, cyclohexane, cycloheptane and cyclooctane)
alkanes to give the corresponding C6-C9 carboxylic acids (Zaltariov et al. 2014a).
The good biological and catalytic activities of these complexes have been attributed
to their amphiphilic nature conferred by the co-existence of the bis-ethylene tetramethyldisiloxane segment and the polar coordination block, which could facilitate
molecular interactions favorable to the biological or catalytic action (Ng et al. 2007;
Soroceanu et al. 2013).
Cobalt, copper and zinc, coordination polymers derived from CX and bipyridyl
ligands have shown very good catalytic activity in the H 2 O 2 decomposition (Racles
et al. 2013b) and as heterogeneous catalysts in photodegradation of organic pollutants such as chemotherapy drug doxorubicin (DOX) (Racles et al. 2019) and Congo
red (CR) dye (Racles et al. 2017b) in ambient light and temperature. It is assumed
that the pronounced hydrophobic nature of these MOFs is partly responsible for
their performance.
11.8 Miscellaneous: Special Properties and Applications
of Functional Silicones
Multifunctional UV-reactive silicones bearing acrylate or epoxy groups and polyethyleneoxide segments were combined by Ruckle and Cheung (2013) with organic
resins having the same reactive groups and the properties of the final films (appearance, cure time, flexibility, gloss, impact resistance, mar resistance, slip and stain
release) were evaluated. These authors concluded that most of the properties were
C. Racles et al.
been well emphasized by dynamic light scattering (DLS), small-angle X-ray scattering (SAXS) and UV-Vis spectroscopy (Soroceanu et al. 2015). This characteristic
can improve specific behaviors or properties (such as biological or catalytic)
depending on the environment. Thus, the bis(2-hydroxyazomethine)s derived from
the siloxane diamine 1,3-bis(amino-phenylene-ester-methylene)tetramethyldisiloxane, with salicylaldehyde and especially with 5-chlorosalicylaldehyde showed a
remarkable biocidal activity (Zaltariov et al. 2013).
Copper complexes of Schiff bases derived from 1,3-bis(3-aminopropyl)tetramethyldisiloxane with differently substituted (2-hydroxy, 3,5-di-bromo, 5-nitro,
2-chloro) salicylaldehydes have been shown to have potential as antimicrobial
agents, as well as improvers for antioxidant activity of the spirulina extract, thus
being of interest for biotechnologies (Soroceanu et al. 2016). In particular, those
with electron withdrawing substituents (bromo, chlorine and nitro) to the aromatic
ring show high catalytic activity and selectivity in the aerobic oxidation of benzyl
alcohol to benzaldehyde mediated by the TEMPO radical, under mild conditions
(Soroceanu et al. 2013). The tetranuclear copper complex of the siloxane derivative
obtained by [2 + 2] condensation of 1,3-bis(aminopropyl)tetramethyldisiloxane and
2,6-diformyl-4-methylphenol have proved suitable as catalyst precursors for the
hydrocarboxylation of a linear C5-C8 variety (n-pentane, n-hexane, n-heptane and
n-octane) and cyclic (cyclopentane, cyclohexane, cycloheptane and cyclooctane)
alkanes to give the corresponding C6-C9 carboxylic acids (Zaltariov et al. 2014a).
The good biological and catalytic activities of these complexes have been attributed
to their amphiphilic nature conferred by the co-existence of the bis-ethylene tetramethyldisiloxane segment and the polar coordination block, which could facilitate
molecular interactions favorable to the biological or catalytic action (Ng et al. 2007;
Soroceanu et al. 2013).
Cobalt, copper and zinc, coordination polymers derived from CX and bipyridyl
ligands have shown very good catalytic activity in the H 2 O 2 decomposition (Racles
et al. 2013b) and as heterogeneous catalysts in photodegradation of organic pollutants such as chemotherapy drug doxorubicin (DOX) (Racles et al. 2019) and Congo
red (CR) dye (Racles et al. 2017b) in ambient light and temperature. It is assumed
that the pronounced hydrophobic nature of these MOFs is partly responsible for
their performance.
11.8 Miscellaneous: Special Properties and Applications
of Functional Silicones
Multifunctional UV-reactive silicones bearing acrylate or epoxy groups and polyethyleneoxide segments were combined by Ruckle and Cheung (2013) with organic
resins having the same reactive groups and the properties of the final films (appearance, cure time, flexibility, gloss, impact resistance, mar resistance, slip and stain
release) were evaluated. These authors concluded that most of the properties were
C. Racles et al.