Issue 27, 2014

The role of boric acid in the synthesis of Eni Carbon Silicates

Abstract

The influence of H3BO3 on the crystallization of hybrid organic–inorganic aluminosilicates denoted as Eni Carbon Silicates (ECS's) was investigated. Syntheses were carried out at 100 °C under different experimental conditions, using bridged silsesquioxanes of general formula (EtO)3Si–R–Si(OEt)3 (R = –C6H4– (BTEB), –C10H6– (BTEN) and –C6H4–C6H4– (BTEBP)), in the presence of equimolar concentrations of NaAlO2 and H3BO3. The study, involving the synthesis of three different but structurally related phases (ECS-14 from BTEB, ECS-13 here described for the first time from BTEN, and ECS-5 from BTEBP), confirmed a catalytic role for H3BO3 which in general increased the crystallization rate and improved the product quality in terms of amount of crystallized phase (crystallinity), size of the crystallites and phase purity, while it was weakly incorporated in trace amounts in the framework of ECS's.

Graphical abstract: The role of boric acid in the synthesis of Eni Carbon Silicates

Supplementary files

Additions and corrections

Article information

Article type
Paper
Submitted
28 mar 2014
Accepted
09 mai 2014
First published
09 mai 2014

Dalton Trans., 2014,43, 10617-10627

The role of boric acid in the synthesis of Eni Carbon Silicates

S. Zanardi, G. Bellussi, W. O. Parker Jr., E. Montanari, M. Bellettato, G. Cruciani, A. Carati, S. Guidetti, C. Rizzo and R. Millini, Dalton Trans., 2014, 43, 10617 DOI: 10.1039/C4DT00919C

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