Title of article :
Encapsulation of direct blue dye into mesoporous silica-based materials
Author/Authors :
Ren، نويسنده , , Tie-Zhen and Yuan، نويسنده , , Zhong-Yong and Su، نويسنده , , Bao-Lian، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
9
From page :
79
To page :
87
Abstract :
Mesoporous hexagonal silica CMI-1, MCM-41, SBA-15 and Al-incorporated silica AlCMI-1 with pore sizes of 2, 2.7, 3.8 and 3.6 nm, respectively, have been synthesized and used as host materials for the fabrication of optical materials by the encapsulation of direct blue 71 dye. The surface silanol groups of these mesoporous silicas were functionalized by silylation with 3-(aminopropyl)-triethoxysilane or methyltrimethoxylsilicate, which allow a successful doping of organic dye molecules. X-ray diffraction, N2 adsorption, thermogravimetric analysis, infrared, UV–vis diffuse reflectance and solid-state NMR spectroscopy were used to structurally characterize these composite products. It is found that the dye molecules of direct blue 71 have been encapsulated in the pores of MCM-41, SBA-15 and AlCMI-1, whereas attached on the external surface of CMI-1. The steric effect from the pore size of the host materials is significant. Moreover, Al-species in the AlCMI-1 were believed to take an important role in the dye encapsulation, resulting in a larger blue-shift of 21 nm than other mesoporous dye/silica composites.
Keywords :
mesoporous materials , Dye encapsulation , Dye/silica composites , Direct blue dye
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Serial Year :
2007
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Record number :
1794932
Link To Document :
بازگشت