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Updated: Feb 8, 2026

One-pot Microwave-assisted Conversion of Anomeric Nitrate-esters to Trichloroacetimidates
Published on: January 15, 2018
Fast, low-cost preparation of hackmanite minerals with reversible photochromic behavior using a microwave-assisted
José M Carvalho1, Isabella Norrbo, Rômulo A Ando
1University of São Paulo, Institute of Physics, São Paulo-SP, 05508-000, Brazil.
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.
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