Skip to main content
Account

Table 2 29Si Chemical shifts (δ) of grafted neat and depolymerizied organosiloxane species at SiO2 surface

From: A 29Si, 1H, and 13C Solid-State NMR Study on the Surface Species of Various Depolymerized Organosiloxanes at Silica Surface

Species

δ, ppm

Si(OH)2(O–)2

− 91

Si(OH)(O–)3

− 100

Si(O–)4

− 109

Si(CH3)(H)(O–)

− 35

(≡SiO)2SiR, R-attached polymer chain

− 58

(≡SiO)3SiR, R-attached polymer chain

− 68

Si(CH3)(R)(O–)2 in D4, R = CH3, C2H4C6H8

− 19.5

Si(CH3)(O–)2 in linear MD4M

− 23

Si(CH3)2(O–)2, D1

− 21

Si(CH3)(C2H4C6H8), D2

− 23

Navigation