Facile synthesis of anhydrous Li 2 B 12 H 12 with high purity by solvent-free method

Liqing He, Huaiyu Shao, Michael Felderhoff, Haiwen Li, Xiangnan Li, Qing Zhu, Dehui Zhang, Dong Wu, Yanda Fu, Yonghong Deng, Zhouguang Lu

Research output: Contribution to journalArticle

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Abstract

This work is aimed to synthesize anhydrous Li 2 B 12 H 12 with high purity via solvent-free reaction between solid state reagents LiBH 4 and B 10 H 14 . The reaction is conducted respectively in open system and sealed system for comparison. It is observed to experience three thermodynamic steps: (1) melting of B 10 H 14 at 103 °C, (2) phase transition of LiBH 4 at 118 °C and (3) Li 2 B 12 H 12 formation at 135 °C. With appropriate heat treatment at 180 °C for 2 h, Li 2 B 12 H 12 with purity high as 93% is obtained in open system of 2LiBH 4  + 1.4B 10 H 14 with excess B 10 H 14 . Sealed system reacting at approximate even optimized conditions is unavailable to produce such high purity of Li 2 B 12 H 12 . Chemical equilibrium confines the sufficient interaction between LiBH 4 and B 10 H 14 in sealed system but it does not do in open system.

Original languageEnglish
Pages (from-to)147-151
Number of pages5
JournalInorganica Chimica Acta
Volume464
DOIs
Publication statusPublished - Jan 1 2017

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Open systems
purity
synthesis
Solid state reactions
reagents
chemical equilibrium
Melting
heat treatment
Phase transitions
Heat treatment
melting
Thermodynamics
solid state
thermodynamics
interactions

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Facile synthesis of anhydrous Li 2 B 12 H 12 with high purity by solvent-free method . / He, Liqing; Shao, Huaiyu; Felderhoff, Michael; Li, Haiwen; Li, Xiangnan; Zhu, Qing; Zhang, Dehui; Wu, Dong; Fu, Yanda; Deng, Yonghong; Lu, Zhouguang.

In: Inorganica Chimica Acta, Vol. 464, 01.01.2017, p. 147-151.

Research output: Contribution to journalArticle

He, L, Shao, H, Felderhoff, M, Li, H, Li, X, Zhu, Q, Zhang, D, Wu, D, Fu, Y, Deng, Y & Lu, Z 2017, ' Facile synthesis of anhydrous Li 2 B 12 H 12 with high purity by solvent-free method ', Inorganica Chimica Acta, vol. 464, pp. 147-151. https://doi.org/10.1016/j.ica.2017.05.025
He, Liqing ; Shao, Huaiyu ; Felderhoff, Michael ; Li, Haiwen ; Li, Xiangnan ; Zhu, Qing ; Zhang, Dehui ; Wu, Dong ; Fu, Yanda ; Deng, Yonghong ; Lu, Zhouguang. / Facile synthesis of anhydrous Li 2 B 12 H 12 with high purity by solvent-free method In: Inorganica Chimica Acta. 2017 ; Vol. 464. pp. 147-151.
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abstract = "This work is aimed to synthesize anhydrous Li 2 B 12 H 12 with high purity via solvent-free reaction between solid state reagents LiBH 4 and B 10 H 14 . The reaction is conducted respectively in open system and sealed system for comparison. It is observed to experience three thermodynamic steps: (1) melting of B 10 H 14 at 103 °C, (2) phase transition of LiBH 4 at 118 °C and (3) Li 2 B 12 H 12 formation at 135 °C. With appropriate heat treatment at 180 °C for 2 h, Li 2 B 12 H 12 with purity high as 93{\%} is obtained in open system of 2LiBH 4  + 1.4B 10 H 14 with excess B 10 H 14 . Sealed system reacting at approximate even optimized conditions is unavailable to produce such high purity of Li 2 B 12 H 12 . Chemical equilibrium confines the sufficient interaction between LiBH 4 and B 10 H 14 in sealed system but it does not do in open system.",
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AU - He, Liqing

AU - Shao, Huaiyu

AU - Felderhoff, Michael

AU - Li, Haiwen

AU - Li, Xiangnan

AU - Zhu, Qing

AU - Zhang, Dehui

AU - Wu, Dong

AU - Fu, Yanda

AU - Deng, Yonghong

AU - Lu, Zhouguang

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N2 - This work is aimed to synthesize anhydrous Li 2 B 12 H 12 with high purity via solvent-free reaction between solid state reagents LiBH 4 and B 10 H 14 . The reaction is conducted respectively in open system and sealed system for comparison. It is observed to experience three thermodynamic steps: (1) melting of B 10 H 14 at 103 °C, (2) phase transition of LiBH 4 at 118 °C and (3) Li 2 B 12 H 12 formation at 135 °C. With appropriate heat treatment at 180 °C for 2 h, Li 2 B 12 H 12 with purity high as 93% is obtained in open system of 2LiBH 4  + 1.4B 10 H 14 with excess B 10 H 14 . Sealed system reacting at approximate even optimized conditions is unavailable to produce such high purity of Li 2 B 12 H 12 . Chemical equilibrium confines the sufficient interaction between LiBH 4 and B 10 H 14 in sealed system but it does not do in open system.

AB - This work is aimed to synthesize anhydrous Li 2 B 12 H 12 with high purity via solvent-free reaction between solid state reagents LiBH 4 and B 10 H 14 . The reaction is conducted respectively in open system and sealed system for comparison. It is observed to experience three thermodynamic steps: (1) melting of B 10 H 14 at 103 °C, (2) phase transition of LiBH 4 at 118 °C and (3) Li 2 B 12 H 12 formation at 135 °C. With appropriate heat treatment at 180 °C for 2 h, Li 2 B 12 H 12 with purity high as 93% is obtained in open system of 2LiBH 4  + 1.4B 10 H 14 with excess B 10 H 14 . Sealed system reacting at approximate even optimized conditions is unavailable to produce such high purity of Li 2 B 12 H 12 . Chemical equilibrium confines the sufficient interaction between LiBH 4 and B 10 H 14 in sealed system but it does not do in open system.

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