FIG. 4: Modeled relaxation time in untreated and silanated pores of Gelsil 5 from Eqn. (1) used in Ref. 23 and in Eqs. (3a,b) for fits of data in Fig. 3b and e herein. FIG. 5: Relaxation time in pore centers calculated from Eq. (1) with corresponding parameters from Tab. II. Horizontal line shows τ = 100 s. Gray lines are relaxation times in untreated pores from Ref. 23. T$_{g}$ − T$_{0}$ = E ln (100 /τ 0 ) = 50 . 6 K, which is obtained from Eq. (1) using the fitparameters E = 1750 K and τ$_{0}$ = 10 − 13 s of Table II. 11 195 200 205 210 215 220 T (K) -2 0 2 4 6 Log ( τ ) 10 τ  = 100 s 7.5 nm 2.4 nm relaxation time  τ (T) in pores T (d) g 230 225 4.8 nm 0 1 2 pore radius (nm) 2 4 6 8 10 12 Log 10 ( τ ) 1 2 0 1 2 pore radius (nm) 1 2 2 4 6 8 10 12 Log 10 ( τ ) untreated silanated d =5.0nm d=4.8nm τ$_{VFT}$ τ$_{VFT}$