Vapor sublimation pressure
for reference compounds

The current set of calibration compounds was suggested in 1999 by ICTAC:
Sabbah, R.; Xu-wu, A.; Chickos, J. S.; Leitão, M. L. P.; Roux, M. V.; Torres, L. A., Reference materials for calorimetry and differential thermal analysis. Thermochim. Acta 1999, 331, 93-204. https://doi.org/10.1016/S0040-6031(99)00009-X 
(section 3. Reference materials for measurement of phase change enthalpies, subsection 3.2. Solid-gas phase changes)

Benzoic acid, Benzophenone, Naphthalene, Ferrocene, Biphenyl, Anthracene, Phenanthrene, trans-Stilbene, Pyrene,
1,3,5-Triphenylbenzene, Iodine

The same set of compounds is used for checking performance of vapor pressure apparatuses.

Step by step, we remeasure data (in cooperation with laboratories in Lyon, Porto, and Gaithersburg) for most compounds from this set (apart from rather volatile iodine):

Benzoic acid:   Monte, M. J. S.; Santos, L. M. N. B. F.; Fulem, M.; Fonseca, J. M. S.; Sousa, C. A. D., New Static Apparatus and Vapor Pressure of Reference Materials:  Naphthalene, Benzoic Acid, Benzophenone, and Ferrocene. J. Chem. Eng. Data 2006, 51, 757-766.  https://doi.org/10.1021/je050502y

Benzophenone: 
1) Monte, M. J. S.; Santos, L. M. N. B. F.; Fulem, M.; Fonseca, J. M. S.; Sousa, C. A. D., New Static Apparatus and Vapor Pressure of Reference Materials:  Naphthalene, Benzoic Acid, Benzophenone, and Ferrocene. J. Chem. Eng. Data 2006, 51, 757-766. https://doi.org/10.1021/je050502y
2) Štejfa, V.; Fulem, M.; Růžička, K.; Morávek, P., New Static Apparatus for Vapor Pressure Measurements: Reconciled Thermophysical Data for Benzophenone.
J. Chem. Eng. Data 2016, 61, 3627−3639. https://doi.org/10.1021/acs.jced.6b00523

Naphthalene:
1) Růžička, K.; Fulem, M.; Růžička, V., Recommended Vapor Pressure of Solid Naphthalene. J. Chem. Eng. Data 2005, 50, 1956-1970.
2) Monte, M. J. S.; Santos, L. M. N. B. F.; Fulem, M.; Fonseca, J. M. S.; Sousa, C. A. D., New Static Apparatus and Vapor Pressure of Reference Materials:  Naphthalene, Benzoic Acid, Benzophenone, and Ferrocene. J. Chem. Eng. Data 2006, 51, 757-766. https://doi.org/10.1021/je050502y

Ferrocene:
1) Monte, M. J. S.; Santos, L. M. N. B. F.; Fulem, M.; Fonseca, J. M. S.; Sousa, C. A. D., New Static Apparatus and Vapor Pressure of Reference Materials:  Naphthalene, Benzoic Acid, Benzophenone, and Ferrocene. J. Chem. Eng. Data 2006, 51, 757-766. https://doi.org/10.1021/je050502y

2) Fulem, M.; Růžička, K.; Červinka, C.; Rocha, M. A. A.; Santos, L. M. N. B. F.; Berg, R. F., Recommended vapor pressure and thermophysical data for ferrocene. J. Chem. Thermodyn. 2013, 57, 530-540. https://doi.org/10.1016/j.jct.2012.07.023.

3) Štejfa V, Fulem M, Růžička K. New static apparatus STAT9 for vapor pressure measurements at temperatures up to 463 K. Journal of Thermal Analysis and Calorimetry. 2024;149:4709–20. https://doi.org/10.1007/s10973-024-13046-2

Anthracene:
1) Mahnel T.; Štejfa, V.; Maryška, M.; Fulem, M.; Růžička, K., Reconciled thermophysical data for anthracene. J. Chem. Thermodyn. 2019, 129, 61-72.  https://doi.org/10.1016/j.jct.2018.08.034

2) Štejfa V, Fulem M, Růžička K. New static apparatus STAT9 for vapor pressure measurements at temperatures up to 463 K. Journal of Thermal Analysis and Calorimetry. 2024;149:4709–20. https://doi.org/10.1007/s10973-024-13046-2

Pyrene, Phenanthrene:
Růžička, K.; Mokbel, I.; Majer, V.; Růžička, V.; Jose, J.; Zábranský, M., Description of vapor-liquid and vapor-solid equilibria for a group of polycondensed compounds of petroleum interest.
Fluid Phase Equilib. 1998, 148, 107-137. https://doi.org/10.1016/S0378-3812(98)00200-3

Remaining reference compounds (Biphenyl, trans-Stilbene, 1,3,5-Triphenylbenzene) will be studied in near future along with newly suggested references (benzanthron, perylene, succinic acid, [C2mim][NTf2] (1-ethyl-3-methyl-imidazolium bis(trifluoro-methylsulfonyl)amide, triethylene glycol, 1-naphthol, dibenzothiophene, ...)

In addition, we have determined vapour pressures for some other substances which have also come to be considered as reference data.:
n-Alkanes:
Růžička, K.; Majer, V., Simultaneous treatment of vapor pressures and related thermal data between the triple and normal boiling temperatures for n-alkanes C5-C20. Journal of Physical and Chemical Reference Data 1994, 23, 1-39.
https://doi.org/10.1063/1.555942

Adamantane:
Mokbel, I.; Růžička, K.; Majer, V.; Růžička, V.; Ribeiro, M.; Jose, J.; Zábranský, M., Phase equilibria for three compounds of petroleum interest: 1-phenyldodecane, (5-alpha)-cholestane, adamantane. Fluid Phase Equilib. 2000, 169, 191-207.
https://doi.org/10.1016/S0378-3812(99)00342-8

Benzene:
Růžička, K.; Fulem, M.; Červinka, C., Recommended sublimation pressure and enthalpy of benzene. The Journal of Chemical Thermodynamics 2014, 68, 40-47. https://dx.doi.org/10.1016/j.jct.2013.08.022

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