Creation of new function of optically active ions having specific oxygen coordination in silica glass

2016 Fiscal Year Final Research Report

• Project/Area Number: 26620200
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: AKAI TOMOKO 国立研究開発法人産業技術総合研究所, 無機機能材料研究部門, グループ長 (00356338)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: メソポーラス / シリカ / 蛍光 / 量子化学 / XAFS

Outline of Final Research Achievements

Sintered mesoporous silica glass doped with optically active ions exhibits efficient luminescence due to the distorted structure around ions. To elucidate a correlation between the coordination structure and electronic state, we studied the coordination structure around Cu ions in Cu doped glass by using quantum chemical calculation and XAFS spectra. Shape of XANES spectrum was calculated by assuming possible structural model. It was found that 8-membered Si-O ring structure having boat like structure can reproduce the shape of XANES spectra. It was also found that EXAFS spectrum can also be explained by the coordination structure similar to the proposed model.

Free Research Field

無機材料化学