Structural Study of Nematogenic Compound 5OS5
Abstract
:1. Introduction
2. Materials and Methods
- (a)
- first heating of a pristine sample which was not melted after synthesis,
- (b)
- heating after direct cooling with a 5 K/min rate from 365 to 263 K,
- (c)
- cooling from 365 to 298 K,
- (d)
- cooling from 365 to 298 K in the low-angle region only.
3. Results
3.1. DSC Thermograms
3.2. POM Observations
3.3. Structural Study by XRD
4. Summary and Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Transition | (K) | (K) | (kJ/mol) | (J/(mol·K)) |
---|---|---|---|---|
Cr → N | 333.6 | 335.1 | 33.2 | 99.1 |
N → X | 352.0 | 352.6 | 0.2 | 0.6 |
X → Iso | 352.8 | 353.3 | 0.6 | 1.8 |
Iso → X | 353.1 | 352.7 | −0.7 | −1.9 |
X → N | - | 352.1 | −0.3 | −0.7 |
N → Cr | 287.0 | 286.6 | −14.6 | - |
Parameter | Pristine Sample | Crystal Grown from Melt | ||
---|---|---|---|---|
Intercept | Slope | Intercept | Slope | |
a | 18.61(5) Å | 0.0042(2) Å/K | 18.99(3) Å | 0.00279(7) Å/K |
b | 5.32(6) Å | 0.0010(2) Å/K | 5.476(4) Å | 0.00041(2) Å/K |
c | 19.6(2) Å | 0.0026(5) Å/K | 19.39(2) Å | 0.00290(7) Å/K |
β | 98.8(4)° | 0.021(2)°/K | 102.0(2)° | 0.0119(7)°/K |
V | 1947(33) Å3 | 0.8(1) Å3/K | 1974(5) Å3 | 0.64(2) Å3/K |
Principal Axis | a | b | c | [10−6/K] |
---|---|---|---|---|
x | 0.7298 | 0 | 0.6837 | −7.5(6.5) |
y | 0 | −1 | 0 | 75(3) |
z | −0.6880 | 0 | 0.7257 | 226(5) |
V | - | - | - | 295(8) |
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Deptuch, A.; Sęk, B.; Lalik, S.; Zając, W.; Ossowska-Chruściel, M.D.; Chruściel, J.; Marzec, M. Structural Study of Nematogenic Compound 5OS5. Crystals 2024, 14, 367. https://doi.org/10.3390/cryst14040367
Deptuch A, Sęk B, Lalik S, Zając W, Ossowska-Chruściel MD, Chruściel J, Marzec M. Structural Study of Nematogenic Compound 5OS5. Crystals. 2024; 14(4):367. https://doi.org/10.3390/cryst14040367
Chicago/Turabian StyleDeptuch, Aleksandra, Bartosz Sęk, Sebastian Lalik, Wojciech Zając, Mirosława D. Ossowska-Chruściel, Janusz Chruściel, and Monika Marzec. 2024. "Structural Study of Nematogenic Compound 5OS5" Crystals 14, no. 4: 367. https://doi.org/10.3390/cryst14040367