New triethoxysilylated 10-vertex closo-decaborate clusters. Synthesis and controlled immobilization into mesoporous silica

Abstract

Novel silylated hydroborate clusters comprising the closo-decaborate cage were prepared and characterized by (1)H, (13)C, (11)B, (29)Si NMR and mass spectroscopy ESI. The synthesis of such silylated clusters was achieved using reactive derivatives of [B10H10](2-), [1-B10H9N2](-) and [2-B10H9CO](-). These silylated decaborate clusters constitute a new class of precursors that can be covalently anchored onto various silica supports without any prior surface modification. As a proof of concept, the synthesized precursors were successfully anchored on mesoporous silica, SBA-15 type, in different percentages, where the mesoporous material retained its structure. All materials modified with closo-decaborate were characterized by (11)B and (29)Si solid state NMR, XRD, TEM and nitrogen sorption.

A family of silatrane‐armed triazole‐encapped salicylaldehyde‐derived Schiff bases: Synthesis, spectral analysis, and antimicrobial and quantum chemical evaluation

“…These terminal alkynes on ‘click silylation; with 3‐azidopropyltriethoxysilane (3‐AzPTES) resulted in triazole‐encapped silanes ( 4 – 6 ) which were transesterified with triethanolamine to derive the ultimate silatranes ( 7 – 9 ). The intermediate Schiff base‐linked acetylenes and organosilanes can be meticulously exploited in the field of medicinal and material chemistry, respectively . In continuation of our study of atrane chemistry, we obtained new organosilatranes which were initially screened for their pharmacokinetic properties following the absorption, distribution, metabolism, excretion and toxicity (ADMET) approach and then investigated for their antimicrobial activities and photophysical properties.…”

Multifunctional Silica Nanoparticles Modified via Silylated‐Decaborate Precursors

“…We have recently reported the synthesis of the first two members of the decaborate-silane precursor family by exploiting the amino [1-B 10 H 9 N 2 ] − and carboxyl [2-B 10 H 9 CO] − anion derivatives. These silylated precursors were then immobilized on mesoporous SBA-15 silica in significant percentages [35]. Based on these results, we report herein the immobilization of decaborate-silane precursors through covalent grafting to silica (SiO 2 ) probe/carrier agent charged with silylated-FITC (fluorescein isothiocyanate) luminescent fluorophore.…”

Recent Achievements on Functionalization within closo‐Decahydrodecaborate [B10H10]2− Clusters

“…Consequently, such precursors can grant access into the broad avenue of applications of hybrid nanomaterials. The first members of boratosilane precursors were synthesized starting from the reaction of the equatorial‐carbonyl and apical‐diazo derivatives of closo‐decaborate, [2‐B 10 H 9 CO] − and [1‐B 10 H 9 N 2 ] − , with aminopropyltriethoxysilane in the presence of a base [71] . These archetypes were covalently anchored to the pore surfaces of mesoporous silica (SBA‐15) in varying percentages as proof of concept (figure 2).…”