Dual role of the six-coordinated molybdenum and lead ions in novel of photochromic properties of the molybdenum-lead-borate glasses

作者：Rada M; Maties V; Culea M; Rada S^*; Culea E

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2010, 75(2): 507-510.

DOI：10.1016/j.saa.2009.10.017

• Molybdenum-lead-borate glasses
• FTIR spectroscopy
• X-ray diffraction
• PbMoO(4) crystalline phase

Transparent glasses were prepared by conventional melting-quenching method in the xMoO(3)center dot(100-x)[3B(2)O(3)center dot PbO] system where 0 <= x <= 15 mol%. By increasing the MoO(3) content up to 20 mol% the PbMoO(4) crystalline phase appears. These systems exhibit a photochromic effect which can be induced through laser exposures (lambda = 633 nm) directly on the bulk sample. Structural investigations by FTIR spectroscopy show that the photosensitive effect is due to a reduction of Mo(6+) to Mo(4+) and/or Mo(5+) promoted by the oxidation of Pb(2+) and some structural changes of the borate network.

• 出版日期2010-2