Abstract
Structural phase transitions of N2-loaded and guest-free hydroquinone (HQ) clathrates have been investigated as a function of pressure using synchrotron X-ray diffraction and Raman spectroscopy. The N 2-loaded β-form HQ clathrate reveals a structural transition to a new high pressure phase near 4 GPa and exhibits gradual N2 release from the hydrogen-bonded organic framework (HOF) cage with a further increase in pressure. Upon reducing the pressure to ambient conditions, the crystal structure reverts to the original β-form HQ clathrate, indicating that the pressure-induced structural transition is fully reversible. In contrast, around 0.4 GPa, the guest-free β-form HQ clathrate undergoes an irreversible phase transition to the nonporous α-form HQ, which is retained at ambient conditions. These results suggest that HOF encaged guest molecules play an important role in the structural transitions under high pressure.
| Original language | English |
|---|---|
| Pages (from-to) | 7621-7625 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry B |
| Volume | 117 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - 2013 Jun 27 |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry
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Pressure-dependent release of guest molecules and structural transitions in hydroquinone clathrate. / Kim, Byeong Soo; Lee, Yongjae; Yoon, Ji Ho.
In: Journal of Physical Chemistry B, Vol. 117, No. 25, 27.06.2013, p. 7621-7625.Research output: Contribution to journal › Article
TY - JOUR
T1 - Pressure-dependent release of guest molecules and structural transitions in hydroquinone clathrate
AU - Kim, Byeong Soo
AU - Lee, Yongjae
AU - Yoon, Ji Ho
PY - 2013/6/27
Y1 - 2013/6/27
N2 - Structural phase transitions of N2-loaded and guest-free hydroquinone (HQ) clathrates have been investigated as a function of pressure using synchrotron X-ray diffraction and Raman spectroscopy. The N 2-loaded β-form HQ clathrate reveals a structural transition to a new high pressure phase near 4 GPa and exhibits gradual N2 release from the hydrogen-bonded organic framework (HOF) cage with a further increase in pressure. Upon reducing the pressure to ambient conditions, the crystal structure reverts to the original β-form HQ clathrate, indicating that the pressure-induced structural transition is fully reversible. In contrast, around 0.4 GPa, the guest-free β-form HQ clathrate undergoes an irreversible phase transition to the nonporous α-form HQ, which is retained at ambient conditions. These results suggest that HOF encaged guest molecules play an important role in the structural transitions under high pressure.
AB - Structural phase transitions of N2-loaded and guest-free hydroquinone (HQ) clathrates have been investigated as a function of pressure using synchrotron X-ray diffraction and Raman spectroscopy. The N 2-loaded β-form HQ clathrate reveals a structural transition to a new high pressure phase near 4 GPa and exhibits gradual N2 release from the hydrogen-bonded organic framework (HOF) cage with a further increase in pressure. Upon reducing the pressure to ambient conditions, the crystal structure reverts to the original β-form HQ clathrate, indicating that the pressure-induced structural transition is fully reversible. In contrast, around 0.4 GPa, the guest-free β-form HQ clathrate undergoes an irreversible phase transition to the nonporous α-form HQ, which is retained at ambient conditions. These results suggest that HOF encaged guest molecules play an important role in the structural transitions under high pressure.
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U2 - 10.1021/jp405082w
DO - 10.1021/jp405082w
M3 - Article
C2 - 23750696
AN - SCOPUS:84879598580
VL - 117
SP - 7621
EP - 7625
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 25
ER -