Fast, low-cost preparation of hackmanite minerals with reversible photochromic behavior using a microwave-assisted structure-conversion method

José M Carvalho; Isabella Norrbo; Rômulo A Ando; Hermi F Brito; Márcia C A Fantini; Mika Lastusaari

doi:10.1039/c8cc03033b

Fast, low-cost preparation of hackmanite minerals with reversible photochromic behavior using a microwave-assisted structure-conversion method

Chem Commun (Camb). 2018 Jun 28;54(53):7326-7329. doi: 10.1039/c8cc03033b.

Authors

José M Carvalho¹, Isabella Norrbo, Rômulo A Ando, Hermi F Brito, Márcia C A Fantini, Mika Lastusaari

Affiliation

¹ University of São Paulo, Institute of Physics, São Paulo-SP, 05508-000, Brazil.

PMID: 29911228
DOI: 10.1039/c8cc03033b

Abstract

A microwave-assisted structure-conversion (MASC) method was used to obtain photochromic hackmanites (M,Na)8Al6Si6O24(Cl,S)2 (M: Li, Na, and K) in a fast (12 to 20 min) one-step process. Structural conversion from Zeolite A to hackmanite minerals has been proven to be very effective through an aluminosilicate crystalline intermediate. Photochromism is observed with both UV and X-ray (CuKα) excitation.