Figure 1 (a) PXRD patterns of fresh and calculated
Ni(TMBDC)(DABCO)0.5; (b) N2adsorption-desorption isotherms of Ni(TMBDC)(DABCO)0.5at 77 K
Figure 1(a) presents the comparison between the calculated and
experimental PXRD patterns of the sample
Ni(TMBDC)(DABCO)0.5. It can be observed that the PXRD
pattern of the synthesized Ni(TMBDC)(DABCO)0.5 shows two
obvious characteristic peaks at 8.1° and 9.5°, which are in good
agreement with the calculated PXRD pattern, suggesting the successful
synthesis of the Ni(TMBDC)(DABCO)0.5.
To assess the permanent porosity of the
Ni(TMBDC)(DABCO)0.5, N2adsorption-desorption isotherms were measured at 77 K. As shown in
Figure 1(b), the N2 adsorption-desorption isotherms of
Ni(TMBDC)(DABCO)0.5 exhibits a characteristic type-I
isotherm with steeply increasing N2 adsorption capacity
at relatively low pressures and a maximum N2 uptake of
267 cm3/g at P/P0 = 1 was
achieved, indicating its microporosity. Derived from the
N2 isotherms, the BET surface area and total pore volume
of Ni(TMBDC)(DABCO)0.5 are 940 m2/g
and 0.41 cm3/g, respectively. The pore size of
Ni(TMBDC)(DABCO)0.5 is uniformly 0.5 nm, as shown in
Figure S2, which is amenable to kinetic diameters of
C3H8 and
C2H6, implying the great potential on
separation of C3/C2/C1 mixture.