Interactions of sodium liquid glass with triethylammonium decahydro-closo-decaborate (Et3NH)2B10H10

Reactions of sodium silicates of liquid glass (LG) with closo-triethylammonium decaborate (Et 3NH)2B10H10 were studied over a wide range of component ratios LG/(Et 3NH)2B10H10 of 95/5, 85/15, 70/30, 60/40, 50/50, 40/60, and 26/74 wt/wt. IR spectroscopy showed that the introduction of anion into the LG gives rise to the formation of a three-dimensionally branched system of multicenter bonds: \(B - H^{\delta - } \cdots H^{\delta + } - O - H^{\delta + } \cdots O^{\delta - } - Si\) and \(B - H^{\delta - } \cdots H^{\delta + } - O \cdots H - O - H \cdots O^{\delta - } - Si\) and, in fact, to the formation of an inorganic polymer in the reaction solution. Studies of the thermal stability limits of closo-decaborate anion in LG/B10H 10 2− compositions showed that the LG silicate matrix modified with anion B10H 10 2− (40/60) is stable up to 500°C.