Possible pore size effects on the state of tris(8-quinolinato)aluminum(iii) (Alq3) adsorbed in mesoporous silicas and their temperature dependence

Motohiro Tagaya; Makoto Ogawa

doi:10.1039/b807593j

Possible pore size effects on the state of tris(8-quinolinato)aluminum(iii) (Alq₃) adsorbed in mesoporous silicas and their temperature dependence

Motohiro Tagaya, Makoto Ogawa^*

^*Corresponding author for this work

Waseda University

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

The states of tris(8-quinolinato)aluminum(iii) (Alq₃) adsorbed in mesoporous silicas with different pore sizes (2.5, 3.1 and 5.0 nm) were investigated. Alq₃ was successfully occluded into the mesoporous silicas from solution and the adsorbed amount of Alq₃ per BET surface area was effectively controlled by changing the added amount Alq₃ to the solution. The state of Alq₃ in the mesopore varied depending on the pore size as well as the adsorbed amount of Alq₃ as revealed by variation of the photoluminescence spectra. The luminescence of the adsorbed Alq₃ was found to be temperature-dependent, indicating the mobility of the adsorbed Alq₃ to temperature variations. The temperature-dependence also depended on the pore size. The guest-guest interactions between Alq₃ molecules as well as the host-guest interactions between Alq₃ and the mesopore were controlled by the pore size.

Original language	English
Pages (from-to)	6849-6855
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	10
Issue number	45
DOIs	https://doi.org/10.1039/b807593j
Publication status	Published - 2008

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Physics and Astronomy(all)

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title = "Possible pore size effects on the state of tris(8-quinolinato)aluminum(iii) (Alq3) adsorbed in mesoporous silicas and their temperature dependence",

abstract = "The states of tris(8-quinolinato)aluminum(iii) (Alq3) adsorbed in mesoporous silicas with different pore sizes (2.5, 3.1 and 5.0 nm) were investigated. Alq3 was successfully occluded into the mesoporous silicas from solution and the adsorbed amount of Alq3 per BET surface area was effectively controlled by changing the added amount Alq3 to the solution. The state of Alq3 in the mesopore varied depending on the pore size as well as the adsorbed amount of Alq3 as revealed by variation of the photoluminescence spectra. The luminescence of the adsorbed Alq3 was found to be temperature-dependent, indicating the mobility of the adsorbed Alq3 to temperature variations. The temperature-dependence also depended on the pore size. The guest-guest interactions between Alq3 molecules as well as the host-guest interactions between Alq3 and the mesopore were controlled by the pore size.",

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N2 - The states of tris(8-quinolinato)aluminum(iii) (Alq3) adsorbed in mesoporous silicas with different pore sizes (2.5, 3.1 and 5.0 nm) were investigated. Alq3 was successfully occluded into the mesoporous silicas from solution and the adsorbed amount of Alq3 per BET surface area was effectively controlled by changing the added amount Alq3 to the solution. The state of Alq3 in the mesopore varied depending on the pore size as well as the adsorbed amount of Alq3 as revealed by variation of the photoluminescence spectra. The luminescence of the adsorbed Alq3 was found to be temperature-dependent, indicating the mobility of the adsorbed Alq3 to temperature variations. The temperature-dependence also depended on the pore size. The guest-guest interactions between Alq3 molecules as well as the host-guest interactions between Alq3 and the mesopore were controlled by the pore size.

AB - The states of tris(8-quinolinato)aluminum(iii) (Alq3) adsorbed in mesoporous silicas with different pore sizes (2.5, 3.1 and 5.0 nm) were investigated. Alq3 was successfully occluded into the mesoporous silicas from solution and the adsorbed amount of Alq3 per BET surface area was effectively controlled by changing the added amount Alq3 to the solution. The state of Alq3 in the mesopore varied depending on the pore size as well as the adsorbed amount of Alq3 as revealed by variation of the photoluminescence spectra. The luminescence of the adsorbed Alq3 was found to be temperature-dependent, indicating the mobility of the adsorbed Alq3 to temperature variations. The temperature-dependence also depended on the pore size. The guest-guest interactions between Alq3 molecules as well as the host-guest interactions between Alq3 and the mesopore were controlled by the pore size.

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Possible pore size effects on the state of tris(8-quinolinato)aluminum(iii) (Alq₃) adsorbed in mesoporous silicas and their temperature dependence

Abstract

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