Bond switching is responsible for nanoductility in zeolitic imidazolate framework glasses

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

Understanding of the fracture mechanism of metal-organic framework glasses remains limited. Using reactive molecular dynamics simulations, we here find that three zeolitic imidazolate framework glasses exhibit pronounced nanoductility upon fracture. This fracture behavior is confirmed by fracture toughness predictions. The results indicate that a model based on a purely brittle fracture significantly underestimates the simulated fracture toughness. We ascribe the nanoductility to a Zn-N bond switching mechanism, which is found to be more pronounced for smaller organic linkers. Thus, this study provides insights into the fracture mechanism of the low-toughness, yet nanoductile metal-organic framework glasses.

OriginalsprogEngelsk
TidsskriftDalton Transactions
Vol/bind50
Udgave nummer18
Sider (fra-til)6126-6132
Antal sider7
ISSN1477-9226
DOI
StatusUdgivet - 30 mar. 2021

Fingeraftryk Dyk ned i forskningsemnerne om 'Bond switching is responsible for nanoductility in zeolitic imidazolate framework glasses'. Sammen danner de et unikt fingeraftryk.

Citationsformater