Abstract
The controlled crystallization of specific tantalum oxide-fluoride and tantalum fluoride anions ([TaOF5]2-, [TaF 6]-, and [TaF7]2-) is demonstrated using organic reagents with varied corresponding pKa values in the presence of aqueous hydrofluoric acid. The identity of tantalum oxide-fluoride or fluoride anions of [TaOF5]2-, [TaF6] -, and [TaF7]2- are shown to crystallize successively from solution to solid state by increasing the corresponding pKa of organic reagents, which lead to the subsequent increase of fluoride concentration in the hydrofluoric acid solution. With the use of this methodology, three new hybrid crystal structures were targeted: [H 2(2,2′-bpy)]TaOF5 (2,2′-bpy = 2,2′-bipyridyl) 1, [Hdpa]TaF6 (dpa = 2,2′-dipyridylamine) 2, and [H2En]TaF7 (En = ethylenediamine) 3, respectively. The applicability and comparison of this methodology for tantalum and previously prepared niobium compounds show that it can be broadly used to design new materials with specific functionalities for other transition metal oxide-fluorides.
| Original language | English |
|---|---|
| Pages (from-to) | 844-850 |
| Number of pages | 7 |
| Journal | Crystal Growth and Design |
| Volume | 14 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 5 2014 |
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ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
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Specific chemistry of the anions : [TaOF5]2-, [TaF6]-, and [TaF7]2-. / Lu, Hongcheng; Gautier, Romain; Donakowski, Martin D.; Fuoco, Lindsay; Liu, Zhengtang; Poeppelmeier, Kenneth R.
In: Crystal Growth and Design, Vol. 14, No. 2, 05.02.2014, p. 844-850.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Specific chemistry of the anions
T2 - [TaOF5]2-, [TaF6]-, and [TaF7]2-
AU - Lu, Hongcheng
AU - Gautier, Romain
AU - Donakowski, Martin D.
AU - Fuoco, Lindsay
AU - Liu, Zhengtang
AU - Poeppelmeier, Kenneth R
PY - 2014/2/5
Y1 - 2014/2/5
N2 - The controlled crystallization of specific tantalum oxide-fluoride and tantalum fluoride anions ([TaOF5]2-, [TaF 6]-, and [TaF7]2-) is demonstrated using organic reagents with varied corresponding pKa values in the presence of aqueous hydrofluoric acid. The identity of tantalum oxide-fluoride or fluoride anions of [TaOF5]2-, [TaF6] -, and [TaF7]2- are shown to crystallize successively from solution to solid state by increasing the corresponding pKa of organic reagents, which lead to the subsequent increase of fluoride concentration in the hydrofluoric acid solution. With the use of this methodology, three new hybrid crystal structures were targeted: [H 2(2,2′-bpy)]TaOF5 (2,2′-bpy = 2,2′-bipyridyl) 1, [Hdpa]TaF6 (dpa = 2,2′-dipyridylamine) 2, and [H2En]TaF7 (En = ethylenediamine) 3, respectively. The applicability and comparison of this methodology for tantalum and previously prepared niobium compounds show that it can be broadly used to design new materials with specific functionalities for other transition metal oxide-fluorides.
AB - The controlled crystallization of specific tantalum oxide-fluoride and tantalum fluoride anions ([TaOF5]2-, [TaF 6]-, and [TaF7]2-) is demonstrated using organic reagents with varied corresponding pKa values in the presence of aqueous hydrofluoric acid. The identity of tantalum oxide-fluoride or fluoride anions of [TaOF5]2-, [TaF6] -, and [TaF7]2- are shown to crystallize successively from solution to solid state by increasing the corresponding pKa of organic reagents, which lead to the subsequent increase of fluoride concentration in the hydrofluoric acid solution. With the use of this methodology, three new hybrid crystal structures were targeted: [H 2(2,2′-bpy)]TaOF5 (2,2′-bpy = 2,2′-bipyridyl) 1, [Hdpa]TaF6 (dpa = 2,2′-dipyridylamine) 2, and [H2En]TaF7 (En = ethylenediamine) 3, respectively. The applicability and comparison of this methodology for tantalum and previously prepared niobium compounds show that it can be broadly used to design new materials with specific functionalities for other transition metal oxide-fluorides.
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U2 - 10.1021/cg401710j
DO - 10.1021/cg401710j
M3 - Article
VL - 14
SP - 844
EP - 850
JO - Crystal Growth and Design
JF - Crystal Growth and Design
SN - 1528-7483
IS - 2
ER -