ABSTRACT

As a part of a project of clarifying the physical properties and dynamics of cyanobiphenyls with chiral molecules, thermodynamic properties of (S)-4-(2-methylbutyl)-40-cyanobiphenyl (5*CB) were investigated by adiabatic calorimetry between T = (5 and 350) K. The complicated phase behaviour was solved and the thermodynamic functions were determined. A new glass transition was identified in the phase II (metastable crystal) at T = 105 K. No inversion of the stability between two crystalline phases was found, being contrary to the expectations from the previous neutron scattering studies.

Compounds

#	Formula	Name
1	C18H19N	(S)-4'-(2-methylbutyl)-[1,1'-biphenyl]-4-carbonitrile

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Triple point temperature, K ; Crystal			Crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Triple point temperature, K ; Metastable crystal			Metastable crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Metastable crystal			Metastable crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Triple point temperature, K ; Cholesteric liquid crystal			Cholesteric liquid crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Cholesteric liquid crystal			Cholesteric liquid crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Triple point temperature, K ; Glass			Glass Cholesteric liquid crystal Gas	Adiabatic calorimetry	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Glass	Temperature, K; Glass	Pressure, kPa; Glass	Glass	Vacuum adiabatic calorimetry	113
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Metastable crystal	Temperature, K; Metastable crystal	Pressure, kPa; Metastable crystal	Metastable crystal	Vacuum adiabatic calorimetry	133
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	132
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Glass	Temperature, K; Glass	Pressure, kPa; Glass	Glass	Vacuum adiabatic calorimetry	21
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Cholesteric liquid crystal	Temperature, K; Cholesteric liquid crystal	Pressure, kPa; Cholesteric liquid crystal	Cholesteric liquid crystal	Vacuum adiabatic calorimetry	3
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	12
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Metastable crystal	Temperature, K; Metastable crystal	Pressure, kPa; Metastable crystal	Metastable crystal	Vacuum adiabatic calorimetry	28
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	29
POMD	1	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	12
POMD	1	Molar entropy, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	12
POMD	1	Molar enthalpy function {Hm(T)-Hm(0)}/T, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	29
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Vacuum adiabatic calorimetry	29
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	51
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Cholesteric liquid crystal	Temperature, K; Cholesteric liquid crystal	Pressure, kPa; Cholesteric liquid crystal	Cholesteric liquid crystal	Vacuum adiabatic calorimetry	15

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of chiral liquid crystalline material (S)-4-(2-methylbutyl)-40-cyanobiphenyl (5*CB)

Suzuki, H.[Hal], Inaba, A.[Akira], Krawczyk, J.[Jan], Massalska-Arodz, M.[Maria]

ABSTRACT