Explanatory parameters of unit structures of BTES-P and BTES-Ph.

Parameters	BTES-P	BTES-Ph
Number of hydrogens	6	4
H/C	2	0.667
Volume (Å3)	169.3	190.6
LUMO (Ha)	0.0389	−0.0330
Atomic charge of Si	0.975	0.907
Atomic charge of O	−0.622	−0.617
a	0.791	3.965
n	2.042	2.498