Zeolites are highly crystalline aluminosilicates with welldefined pores that are constructed of SiO 2 and AlO 4 tetrahedra. These tetrahedra can be linked together in different unique ways to form various materials with a specific topology. [1] According to the International Zeolite Association (IZA), more than 250 different topologies, which are all assigned with a three-letter code, have been identified. [2] The micropores in zeolites are typically constructed from 8, 10, or 12 tetrahedral atoms

Ac ooperative OSDAs trategy is demonstrated, leading to novel high-silica FAUzeolites with alarge potential for disruptive acid catalysis.I nb ottom-up synthesis,t he symbiosis of choline ion (Ch + )a nd 15-crown-5( CE) was evidenced, in af orm of full occupation of the sodalite (sod) cages with the trans Ch + conformer,i nduced by the CE presence.C Ei tself occupied the supercages along with additional gaucheC h + ,b ut in synthesis without CE, no trans was found. The cooperation, and thus the fraction of trans Ch + ,was closely related to the Si/Al ratio,akey measure for FAU stability and acidity.Assuch, abottom-up handle for lowering the Al-content of FAUa nd tuning its acid site distribution is shown.Amechanistic study demonstrated that forming sod cages with trans Ch + is key to the nucleation of high-silica FAU zeolites.T he materials showed superior performances to commercial FAUz eolites and those synthesized without cooperation, in the catalytic degradation of polyethylene.

Ac ooperative OSDAs trategy is demonstrated, leading to novel high-silica FAUzeolites with alarge potential for disruptive acid catalysis.I nb ottom-up synthesis,t he symbiosis of choline ion (Ch + )a nd 15-crown-5( CE) was evidenced, in af orm of full occupation of the sodalite (sod) cages with the trans Ch + conformer,i nduced by the CE presence.C Ei tself occupied the supercages along with additional gaucheC h + ,b ut in synthesis without CE, no trans was found. The cooperation, and thus the fraction of trans Ch + ,was closely related to the Si/Al ratio,akey measure for FAU stability and acidity.Assuch, abottom-up handle for lowering the Al-content of FAUa nd tuning its acid site distribution is shown.Amechanistic study demonstrated that forming sod cages with trans Ch + is key to the nucleation of high-silica FAU zeolites.T he materials showed superior performances to commercial FAUz eolites and those synthesized without cooperation, in the catalytic degradation of polyethylene.