Effect of growth temperatures on the structural and optical properties of bulk tris-(8-hydroxyquinoline) aluminium (III)

Mrinmoy Debsharma; Tanay Pramanik; Goutam Pramanik; Amit Ranjan Maity; Alok Jain; Rupam Mukherjee

doi:10.1007/s00339-024-07461-3

Effect of growth temperatures on the structural and optical properties of bulk tris-(8-hydroxyquinoline) aluminium (III)

Mrinmoy Debsharma, Tanay Pramanik, Goutam Pramanik, Amit Ranjan Maity, Alok Jain, Rupam Mukherjee

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

2 Scopus citations

Abstract

Bulk samples of Tris (8-hydroxyquinoline) aluminium (Alq₃) were prepared using wet synthesis method followed by annealing at 50 °C, 100 °C, 150 °C and 200 °C for 2 h. X ray diffraction pattern showed the formation of Alq₃ crystal which is constituted of Al atom, anions of 8-hydroxyquinoline (8-Hq) and porous Al₂O₃–Al(OH)₃. structure. The spectra of FTIR (Fourier-transform infrared) reveals that annealing Alq₃ at 50 °C reduces the C=C peak to negligible but reappears when annealed at 150 °C. FESEM on as-prepared Alq₃ shows hexagonal rod shaped stacked structures which on annealing at 50 °C changes to tetragonal agglomerated grains along with appearance of oval and circular shaped pores on it. From fluorescence spectroscopy it is found that the peak intensity changes non-monotonically with annealing temperatures followed by red shift and blue shift of peak maximum at 150 °C and 200 °C respectively. The temperature dependent change in the properties are mainly attributed to the onset of hydrolysis in Alq₃ and change in the electronic transition levels.

Original language	English
Article number	281
Journal	Applied Physics A: Materials Science and Processing
Volume	130
Issue number	5
DOIs	https://doi.org/10.1007/s00339-024-07461-3
State	Published - 1 May 2024
Externally published	Yes

Keywords

Annealing
Hydrolysis
Non fluorescent
Optoelectronic
Quenching

ASJC Scopus subject areas

General Chemistry
General Materials Science

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10.1007/s00339-024-07461-3

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title = "Effect of growth temperatures on the structural and optical properties of bulk tris-(8-hydroxyquinoline) aluminium (III)",

abstract = "Bulk samples of Tris (8-hydroxyquinoline) aluminium (Alq3) were prepared using wet synthesis method followed by annealing at 50 °C, 100 °C, 150 °C and 200 °C for 2 h. X ray diffraction pattern showed the formation of Alq3 crystal which is constituted of Al atom, anions of 8-hydroxyquinoline (8-Hq) and porous Al2O3–Al(OH)3. structure. The spectra of FTIR (Fourier-transform infrared) reveals that annealing Alq3 at 50 °C reduces the C=C peak to negligible but reappears when annealed at 150 °C. FESEM on as-prepared Alq3 shows hexagonal rod shaped stacked structures which on annealing at 50 °C changes to tetragonal agglomerated grains along with appearance of oval and circular shaped pores on it. From fluorescence spectroscopy it is found that the peak intensity changes non-monotonically with annealing temperatures followed by red shift and blue shift of peak maximum at 150 °C and 200 °C respectively. The temperature dependent change in the properties are mainly attributed to the onset of hydrolysis in Alq3 and change in the electronic transition levels.",

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author = "Mrinmoy Debsharma and Tanay Pramanik and Goutam Pramanik and Maity, {Amit Ranjan} and Alok Jain and Rupam Mukherjee",

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AU - Debsharma, Mrinmoy

AU - Pramanik, Tanay

AU - Pramanik, Goutam

AU - Maity, Amit Ranjan

AU - Jain, Alok

AU - Mukherjee, Rupam

N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature 2024.

PY - 2024/5/1

Y1 - 2024/5/1

N2 - Bulk samples of Tris (8-hydroxyquinoline) aluminium (Alq3) were prepared using wet synthesis method followed by annealing at 50 °C, 100 °C, 150 °C and 200 °C for 2 h. X ray diffraction pattern showed the formation of Alq3 crystal which is constituted of Al atom, anions of 8-hydroxyquinoline (8-Hq) and porous Al2O3–Al(OH)3. structure. The spectra of FTIR (Fourier-transform infrared) reveals that annealing Alq3 at 50 °C reduces the C=C peak to negligible but reappears when annealed at 150 °C. FESEM on as-prepared Alq3 shows hexagonal rod shaped stacked structures which on annealing at 50 °C changes to tetragonal agglomerated grains along with appearance of oval and circular shaped pores on it. From fluorescence spectroscopy it is found that the peak intensity changes non-monotonically with annealing temperatures followed by red shift and blue shift of peak maximum at 150 °C and 200 °C respectively. The temperature dependent change in the properties are mainly attributed to the onset of hydrolysis in Alq3 and change in the electronic transition levels.

AB - Bulk samples of Tris (8-hydroxyquinoline) aluminium (Alq3) were prepared using wet synthesis method followed by annealing at 50 °C, 100 °C, 150 °C and 200 °C for 2 h. X ray diffraction pattern showed the formation of Alq3 crystal which is constituted of Al atom, anions of 8-hydroxyquinoline (8-Hq) and porous Al2O3–Al(OH)3. structure. The spectra of FTIR (Fourier-transform infrared) reveals that annealing Alq3 at 50 °C reduces the C=C peak to negligible but reappears when annealed at 150 °C. FESEM on as-prepared Alq3 shows hexagonal rod shaped stacked structures which on annealing at 50 °C changes to tetragonal agglomerated grains along with appearance of oval and circular shaped pores on it. From fluorescence spectroscopy it is found that the peak intensity changes non-monotonically with annealing temperatures followed by red shift and blue shift of peak maximum at 150 °C and 200 °C respectively. The temperature dependent change in the properties are mainly attributed to the onset of hydrolysis in Alq3 and change in the electronic transition levels.

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KW - Quenching

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Effect of growth temperatures on the structural and optical properties of bulk tris-(8-hydroxyquinoline) aluminium (III)

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