Lee, Yongjae Kao, Chi-Chang Kim, Sun Jin Lee, Hyun-Hwi Lee, Done Ryeol Shin, Tae Joo Choi, Jae-Young 2024-01-21T00:03:04Z 2024-01-21T00:03:04Z 2021-09-02 2007-12-11 0897-4756 https://pubs.kist.re.kr/handle/201004/133885 Understanding the formation and evolution of confined water molecules is critical in understanding many chemical and biological processes as well as the water transport inside the Earth. It is often difficult, however, to probe such processes because the host-guest interactions are dynamic in nature. Using a well-defined zeolitic channel as an ideal host and hydrostatic pressure as a driving force, we show how water molecules are introduced and evolve into various confined nanostructures up to 3.37 GPa. In the initial stage of pressure-induced hydration (PIH) occurring inside the undulating 12-ring channels of a synthetic potassium gallosilicate with zeolite LTL topology, water molecules preferentially assemble into hydrogen-bonded clusters, which alternate with water layers. With increasing PIH (by similar to 50%) at higher pressures, the interaction between the confined water molecules increases and the water clusters and layers are interconnected to form hydrogen-bonded water nanotubes inside the zeolitic channels. The confined water nanotube closes its maximum access diameter at further increasing pressures and gradually transforms into isolated species interacting with the zeolitic host framework. The evolution of the confined water nanostructures is well-coordinated by the concerted changes in the framework distortion and the re-entrant cation migration, which appear to be driven by the gradual "flattening" of the host 12-ring, channels. English AMER CHEMICAL SOC CARBON NANOTUBES CLUSTERS Water nanostructures confined inside the quasi-one-dimensional channels of LTL zeolite Article 10.1021/cm702198x 1 CHEMISTRY OF MATERIALS, v.19, no.25, pp.6252 - 6257 CHEMISTRY OF MATERIALS 19 25 6252 6257 scie scopus 000251422000031 2-s2.0-38049115391 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article CARBON NANOTUBES CLUSTERS Nanostructure Zeolite Channel LTL PIH Gallosilicate