Effect of synthesis conditions on morphology and spectral properties of SiO2:DAST composites

被引：0

作者：

Bezkrovna, O. M. ^{[1
]}

Pritula, I. M. ^{[1
]}

Babenko, G. N. ^{[1
]}

Kozlovskyi, A. A. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Inst Single Crystals, SSI Inst Single Crystals, Nauky Ave 60, UA-61072 Kharkiv, Ukraine

来源：

SOLID STATE SCIENCES | 2023年 / 142卷

关键词：

SiO2; matrices; Luminescence; DAST; Pores; Nanostructures; CRYSTAL; NANOCRYSTALS; GROWTH; SILICA; GEL;

D O I：

10.1016/j.solidstatesciences.2023.107257

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

SiO2:DAST composites based on SiO2 matrices with a porosity of 30-70% saturated with DAST molecules were synthesized both by evaporation from a solution and by lowering the temperature in a crystallizer. X-ray study of the composites showed the absence of DAST crystalline phase. There was only one luminescence band for all the composites with a maximum in the region of 620-640 nm (at their annealing at 100 degrees C). A hypsochromic shift (590-565 nm) of the luminescence band maxima of the composites was observed with an increase in their annealing temperature to 200 degrees C. Annealing at 200 degrees C also led to a change in the structure of the composite - "filling" of the pores of SiO2 matrices. This was probably due to a decrease in the interaction of the adsorbed DAST cations with the surface of SiO2 matrices due to exfoliation of DAST layers from the xerogel surface into the pores.

引用

页数：5

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