Structure-directing study of 1-methylimidazolium-based dication with tetramethylene as spacer length in the synthesis of microporous silicoaluminophosphates

The molecular sieves, AFO, AEI and CHA-t, were synthesized using the 4BI cation as OSDAs. The crystallization of AEI and AFO phases was through in hydroxide media, while in the presence of fluoride induces the formation of triclinic chabazite (CHA-t).