Ambient-condition nano-alumina formation through molecular control

Yuzhong Wang; Sonali Bhandari; Amitabha Mitra; Sean Parkin; Jerry Moore; David A. Atwood

doi:10.1002/zaac.200500131

Ambient-condition nano-alumina formation through molecular control

Yuzhong Wang, Sonali Bhandari, Amitabha Mitra, Sean Parkin, Jerry Moore, David A. Atwood

Chemistry

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

15 Scopus citations

Abstract

When toluene solutions of the tetrametallic compound, [Al{μ-OEt) ₂AlMe₂}₃] (1), are stirred in air at room temperature, pure amorphous nanoparticulate Al₂O₃ precipitates. The average particle size is 17.7 ± 7.4 nm. The tetrametallic core of 1, having the correct stoichiometry for alumina (2Al ₂O₃) appears to act as a template or nucleating site for the formation of alumina rather than the expected products of formula, AlOOH. The stability of the Al₄O₆ core of 1 was tested by combining it with six equivalents of Ph₃SiOH. This resulted in [Al{μ-OEt)₂Al(OSiPh₃)₂}₃] (2). Upon exposure to air, compound 2 formed the hydroxide derivative [Al{μ-OH)₂Al(OSiPh₃)₂}₃] (3). This demonstrates that the tetrametallic core of 1 is stable to both peripheral derivatization as well as alcoholysis of the internal bridging groups.

Original language	English
Pages (from-to)	2937-2941
Number of pages	5
Journal	Zeitschrift fur Anorganische und Allgemeine Chemie
Volume	631
Issue number	13-14
DOIs	https://doi.org/10.1002/zaac.200500131
State	Published - 2005

Bibliographical note

Funding Information:
Supported by Dirección General de Enseñanza Superior e Investigación Científica (MEC, grant PB98-0735).

Keywords

Alkoxide
Alumina
Aluminum
Mitsubishi structure
Tetrametallic

ASJC Scopus subject areas

Inorganic Chemistry

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@article{0ed5a8dc7e0f43de843192e421571c9a,

title = "Ambient-condition nano-alumina formation through molecular control",

abstract = "When toluene solutions of the tetrametallic compound, [Al{μ-OEt) 2AlMe2}3] (1), are stirred in air at room temperature, pure amorphous nanoparticulate Al2O3 precipitates. The average particle size is 17.7 ± 7.4 nm. The tetrametallic core of 1, having the correct stoichiometry for alumina (2Al 2O3) appears to act as a template or nucleating site for the formation of alumina rather than the expected products of formula, AlOOH. The stability of the Al4O6 core of 1 was tested by combining it with six equivalents of Ph3SiOH. This resulted in [Al{μ-OEt)2Al(OSiPh3)2}3] (2). Upon exposure to air, compound 2 formed the hydroxide derivative [Al{μ-OH)2Al(OSiPh3)2}3] (3). This demonstrates that the tetrametallic core of 1 is stable to both peripheral derivatization as well as alcoholysis of the internal bridging groups.",

keywords = "Alkoxide, Alumina, Aluminum, Mitsubishi structure, Tetrametallic",

author = "Yuzhong Wang and Sonali Bhandari and Amitabha Mitra and Sean Parkin and Jerry Moore and Atwood, {David A.}",

note = "Funding Information: Supported by Direcci{\'o}n General de Ense{\~n}anza Superior e Investigaci{\'o}n Cient{\'i}fica (MEC, grant PB98-0735). ",

year = "2005",

doi = "10.1002/zaac.200500131",

language = "English",

volume = "631",

pages = "2937--2941",

number = "13-14",

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TY - JOUR

T1 - Ambient-condition nano-alumina formation through molecular control

AU - Wang, Yuzhong

AU - Bhandari, Sonali

AU - Mitra, Amitabha

AU - Parkin, Sean

AU - Moore, Jerry

AU - Atwood, David A.

N1 - Funding Information: Supported by Dirección General de Enseñanza Superior e Investigación Científica (MEC, grant PB98-0735).

PY - 2005

Y1 - 2005

N2 - When toluene solutions of the tetrametallic compound, [Al{μ-OEt) 2AlMe2}3] (1), are stirred in air at room temperature, pure amorphous nanoparticulate Al2O3 precipitates. The average particle size is 17.7 ± 7.4 nm. The tetrametallic core of 1, having the correct stoichiometry for alumina (2Al 2O3) appears to act as a template or nucleating site for the formation of alumina rather than the expected products of formula, AlOOH. The stability of the Al4O6 core of 1 was tested by combining it with six equivalents of Ph3SiOH. This resulted in [Al{μ-OEt)2Al(OSiPh3)2}3] (2). Upon exposure to air, compound 2 formed the hydroxide derivative [Al{μ-OH)2Al(OSiPh3)2}3] (3). This demonstrates that the tetrametallic core of 1 is stable to both peripheral derivatization as well as alcoholysis of the internal bridging groups.

AB - When toluene solutions of the tetrametallic compound, [Al{μ-OEt) 2AlMe2}3] (1), are stirred in air at room temperature, pure amorphous nanoparticulate Al2O3 precipitates. The average particle size is 17.7 ± 7.4 nm. The tetrametallic core of 1, having the correct stoichiometry for alumina (2Al 2O3) appears to act as a template or nucleating site for the formation of alumina rather than the expected products of formula, AlOOH. The stability of the Al4O6 core of 1 was tested by combining it with six equivalents of Ph3SiOH. This resulted in [Al{μ-OEt)2Al(OSiPh3)2}3] (2). Upon exposure to air, compound 2 formed the hydroxide derivative [Al{μ-OH)2Al(OSiPh3)2}3] (3). This demonstrates that the tetrametallic core of 1 is stable to both peripheral derivatization as well as alcoholysis of the internal bridging groups.

KW - Alkoxide

KW - Alumina

KW - Aluminum

KW - Mitsubishi structure

KW - Tetrametallic

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ER -

Ambient-condition nano-alumina formation through molecular control

Abstract

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Keywords

ASJC Scopus subject areas

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