Mechanisms of Tenebrescence and Persistent Luminescence in Synthetic Hackmanite Na8Al6Si6O24(Cl,S)(2)
2016 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 8, no 18, 11592-11602 p.Article in journal (Refereed) PublishedText
Synthetic hackmanites, Na8Al6Si6O24(Cl,S)(2), showing efficient purple tenebrescence and blue/white persistent luminescence were studied using different spectroscopic techniques to obtain a quantified view on the storage and release of optical energy in these materials. The persistent luminescence emitter was identified as impurity Ti3+ originating from the precursor materials used in the synthesis, and the energy storage for persistent luminescence was postulated to take place in oxygen vacancies within the aluminosilicate framework. Tenebrescence, on the other hand, was observed to function within the Na-4(Cl,S) entities located in the cavities of the aluminosilicate framework. The mechanism of persistent luminescence and tenebrescence in hackmanite is presented for the first time.
Place, publisher, year, edition, pages
2016. Vol. 8, no 18, 11592-11602 p.
markers, persistent luminescence, tenebresence, photochromism, hackmanite, sodalite, XPS, NMR, EPR
IdentifiersURN: urn:nbn:se:uu:diva-297786DOI: 10.1021/acsami.6b01959ISI: 000375521000047PubMedID: 27088662OAI: oai:DiVA.org:uu-297786DiVA: diva2:943606
FunderSwedish Energy AgencyKnut and Alice Wallenberg FoundationEU, FP7, Seventh Framework Programme, 312284