King Abdullah University of Science & Technology, KAUST Catalysis Center, 23955-6900 Thuwal, Saudi Arabia.
Chem Commun (Camb). 2012 Mar 25;48(25):3067-9. doi: 10.1039/c2cc00143h. Epub 2012 Feb 16.
2D double-quantum (1)H-(1)H NMR unambiguously shows that the "isolated" ≡Si-OH surface silanols of dehydroxylated SBA-15 are converted upon treatment with ammonia into single silylamine surface site ≡Si-NH(2). The "gem" di-silanols (=Si(OH)(2)) remain intact. Treatment using HMDS produces (=Si(OSiMe(3))(2)) but leaves ≡Si-NH(2) untouched. The resulting surface is hydrophobic and stable.
2D 双量子 (1)H-(1)H NMR 明确显示，经氨处理后，脱羟 SBA-15 的“孤立”≡Si-OH 表面硅醇转化为单硅胺表面≡Si-NH2。“偕二”硅醇（=Si(OH)(2)）保持完整。使用 HMDS 处理会产生（=Si(OSiMe(3))(2)），但≡Si-NH2 不受影响。得到的表面是疏水且稳定的。
