Table 2.

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