Structural insights into hybrid immiscible blends of metal–organic framework and sodium ultraphosphate glasses

Abstract

Recently, increased attention has been focused on amorphous metal-organic frameworks (MOFs) and, more specifically, MOF glasses, the first new glass category discovered since the 1970s. In this work, we explore...

Loading and thermal behaviour of ZIF-8 metal–organic framework-inorganic glass composites

“…As a tentative conclusion, this second peak could correspond to a potential interaction between the phases in which Zn and P atoms are bridged via an oxygen atom, the same interaction identified previously in ZIF-8/ 50Na 2 O-50P 2 O 5 20 and a g ZIF-62/30Na 2 O-70P 2 O 5 systems. 21 However, the residual obtained from the fitting of the (ZIF-8) 0.1 (Inorganic) 0.9 composite shows a negative peak at r ∼1.6 Å, consistent with the Si-O bond length in the borosilicate capillary (Fig. S51 †) and suggests that the empty capillary data have been over-subtracted during data normalisation.…”

“…The air stability of the (ZIF-8) 0.4 (Inorganic) 0.6 composite was tested to determine whether ZIF-8 reduced the known hygroscopic nature of ultraphosphate glasses. 21,44 The inorganic glass and (ZIF-8) 0.4 (Inorganic) 0.6 were left in air for three weeks. After this time, the inorganic glass displayed a visible wetting effect (Fig.…”

“…19 Other examples include combining ZIF-8 and a g ZIF-62 with fluoroaluminophosphate glasses 9,17 and sodium phosphate glasses. 20,21…”

“…19 Other examples include combining ZIF-8 and a g ZIF-62 with fluoroaluminophosphate glasses 9,17 and sodium phosphate glasses. 20,21 Here, this approach is extended by combining ZIF-8 and an ultraphopshate glass, 20Na 2 O-10NaCl-70P 2 O 5 (inorganic or 'IG') to create a compositional series of hybrid materials, namely metal-organic framework crystal inorganic glass composites (MOF-CIGCs). 22 The ultraphosphate glass consists of tetrahedral PO 4 units linked via bridging oxygen atoms, 23,24 which can be described as Q 3 and Q 2 units (Fig.…”

Thermally activated structural phase transitions and processes in metal–organic frameworks

“…Moreover, multivariate and linear regression analysis of PDF data provides information about the atom–atom interactions at the interface of MOF-composites. 206,207 In addition, in situ PDF experiments are an effective way to monitor melting and vitrification processes, providing insights into changes in the local structure upon heating.…”