biostudies-literatureLozinska MMRoyal SocietyEngineering and Physical Sciences Research Councile202201689https://www.ebi.ac.uk/biostudies/studies/S-EPMC9804891biostudies-literatureUnknown28(56)High silica zeolite ZK-5 (framework Si/Al=4.8) has been prepared by interzeolite conversion from ultrastable zeolite Y via a co-templating route using alkali metal cations and nitrate anions but without organic structure directing agents. The mechanism, which involves zeolite framework - alkali metal cation - nitrate anion ordering, has been established by a combination of chemical and thermal analyses, Raman spectroscopy, computational modelling, and X-ray powder diffraction. Ammonium exchange gives ZK-5 with occluded ammonium nitrate and subsequent heating gives microporous zeolite ZK-5.Chemistry (Weinheim an der Bergstrasse, Germany)Understanding the Anion-Templated, OSDA-Free, Interzeolite Conversion Synthesis of High Silica Zeolite ZK-5.PMC9804891INF\R2\192052EP/S016201/1EP/R023751/1EP/L017008/1EP/T019298/1EP/S016147/1Cox PALozinska MMMattock JChitac RGTurrina AWright PABruce ELfalseUnderstanding the Anion-Templated, OSDA-Free, Interzeolite Conversion Synthesis of High Silica Zeolite ZK-5.High silica zeolite ZK-5 (framework Si/Al=4.8) has been prepared by interzeolite conversion from ultrastable zeolite Y via a co-templating route using alkali metal cations and nitrate anions but without organic structure directing agents. The mechanism, which involves zeolite framework - alkali metal cation - nitrate anion ordering, has been established by a combination of chemical and thermal analyses, Raman spectroscopy, computational modelling, and X-ray powder diffraction. Ammonium exchange gives ZK-5 with occluded ammonium nitrate and subsequent heating gives microporous zeolite ZK-5.2022-01-01T00:00:00Z2022 Oct2025-04-04T21:04:35.366Z2025-04-04T21:04:35.366ZS-EPMC98048913582119810.1002/chem.202201689