A1 Refereed original research article in a scientific journal

Multifunctional persistent luminescent and photochromic hackmanite-based materials prepared by microwave-assisted solid-state synthesis




AuthorsMerízio, Leonnam Gotardo; Machado, Ian Pompermayer; Vastamäki, Roosa; de Camargo, Andréa Simone Stucchi; Lastusaari, Mika

PublisherElsevier

Publication year2024

JournalOptical Materials

Journal name in sourceOptical Materials

Article number115826

Volume155

ISSN0925-3467

eISSN1873-1252

DOIhttps://doi.org/10.1016/j.optmat.2024.115826

Web address https://doi.org/10.1016/j.optmat.2024.115826


Abstract

Advanced optical materials inspired by natural minerals and non-toxic light elements, such as the Hackmanites (Na8Al6Si6O24(Cl,S)2), find vast possibilities of applications as they can simultaneously perform photochromism and persistent luminescence (PersL). In this work, we have explored a rapid and energy-efficient microwave-assisted (MASS) methodology for the synthesis of PersL and photochromic hackmanites. In addition, we have prepared hackmanite materials using a zeolite-free precursor to control the Na-Al-Si ratio and study its influence on the materials’ photoluminescent properties. The PersL hackmanites showed a white-bluish emission color, with up to 2 hours of emission time. Zeolite-free photochromic materials were able to change the color from white to purple/blue efficiently with a few seconds of 254 nm excitation, but the usage of zeolite precursors enhanced the overall optical performance. Microwave synthesis times of 10–40 min were demonstrated to be optimal, as longer times boosted the formation of nepheline spurious phase, which decreases luminescence efficiency. In this way, the MASS method led to a reduction of reaction time up to 99,3%, yielding hackmanite materials with similar photoluminescent or photochromic properties compared to those obtained by a 24 h conventional solid-state synthesis. This work represents a significant improvement toward coupling eco-friendly synthetic processes to eco-friendly solid-state materials for PersL illumination and PersL/photochromism optical marking.


Funding information in the publication
This work was supported by FAPESP – Fundação de Amparo à Pesquisa do Estado de São Paulo through the grants N. 2013/07793-6 (CeRTEV – Center for Research, Technology, and Education in Vitreous Materials); N. 2021/08111-2 (MCL:TR – Rare Earth Based Light Converters Materials) N. 2019/21770-5 (Postdoctoral fellowship of LGM), and N. 2022/07667-0 (BEPE fellowship of LGM).


Last updated on 2025-28-02 at 09:08