TY - JOUR
T1 - Adsorption of tris(8-hydroxyquinolinato)aluminum on phosphoric acid-containing mesoporous silica particles
AU - Shi, Wanyu
AU - Liu, Zizhen
AU - Kataoka, Takuya
AU - Kurakami, Yuri
AU - Tagaya, Motohiro
N1 - Funding Information:
This study was partially supported by a grant from the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant-in-Aid for Young Scientists (A), Grant No. 17H04954). The authors thank Analysis and Instrumentation Center in Nagaoka University of Technology for providing the facilities.
Funding Information:
This study was partially supported by a grant from the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant-in-Aid for Young Scientists (A), Grant No. 17H04954). The authors thank Analysis and Instrumentation Center in Nagaoka University of Technology for providing the facilities.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - The effect of the phosphoric acid addition on the nanostructures of the mesoporous silica (MPS) particles and the states of tris(8-hydroxyquinolinato)aluminum (Alq3) in the mesopores were investigated. It was found that the regularity of the mesopores of the MPS particles became irregular by the excessive addition of phosphoric acid. Furthermore, the phosphoric acid on the silica skeletons in the mesopores would strictly interact with the Alq3 molecules, so that the proportion of monomer components with less overlap among the π-π orbitals (i.e., δ-phase-like Alq3 molecules) increased with increasing the phosphoric acid, which was effectively monitored in the fluorescence spectra. It was suggested that the interactions between Alq3 and mesopores were formed not only by hydrogen bonds but also by electrostatic forces between P–O− and aluminum ion, and then the Alq3 molecules were planarly fixed on the surfaces, indicating the importance of the phosphoric acid addition for fixing the photofunctional species on the mesopores.
AB - The effect of the phosphoric acid addition on the nanostructures of the mesoporous silica (MPS) particles and the states of tris(8-hydroxyquinolinato)aluminum (Alq3) in the mesopores were investigated. It was found that the regularity of the mesopores of the MPS particles became irregular by the excessive addition of phosphoric acid. Furthermore, the phosphoric acid on the silica skeletons in the mesopores would strictly interact with the Alq3 molecules, so that the proportion of monomer components with less overlap among the π-π orbitals (i.e., δ-phase-like Alq3 molecules) increased with increasing the phosphoric acid, which was effectively monitored in the fluorescence spectra. It was suggested that the interactions between Alq3 and mesopores were formed not only by hydrogen bonds but also by electrostatic forces between P–O− and aluminum ion, and then the Alq3 molecules were planarly fixed on the surfaces, indicating the importance of the phosphoric acid addition for fixing the photofunctional species on the mesopores.
KW - Bioceramics
KW - Fluorescence
KW - Mesoporous silica particles
KW - Phosphoric acid
KW - Tris(8-hydroxyquinolinato)aluminum
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U2 - 10.1016/j.matchemphys.2023.127334
DO - 10.1016/j.matchemphys.2023.127334
M3 - Article
AN - SCOPUS:85146440197
SN - 0254-0584
VL - 297
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 127334
ER -