ABSTRACT

In this work, the stability of 5,10,15,20-tetraphenylporphine (TPP) and its metallic derivatives, NiTPP, CoTPP, CuTPP, and ZnTPP has been studied through differential scanning calorimetry and thermogravimetry. The decomposition temperatures are (712, 710, 708, 702, and 671) K for NiTPP, CoTPP, CuTPP, ZnTPP, and TPP, respectively. These values are in correspondence with the N M bond length dM N, of the metalloporphyrins. The corresponding molar enthalpies of melting DfusHm, were determined as (58, 57, 55, 52, and 44) kJ mol 1 for the same series. These values are discussed in terms of the crystallographic features in the solid state.

Compounds

#	Formula	Name
1	C44H30N4	.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphine
2	C44H28CoN4	cobalt(II) 5,10,15,20-tetraphenylporphyrin-21,23-diide
3	C44H28CuN4	[5,10,15,20-tetraphenyl-21H,23H-porphinato(2-)-N21,N22,N23,N24]copper
4	C44H28N4Ni	nickel meso-tetraphenylporphine
5	C44H28N4Zn	[5,10,15,20-tetraphenyl-21H,23H-porphinato(2-)-N21,N22,N23,N24]zinc

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	Phase	Method	#Points
POMD	1	Normal melting temperature, K ; Crystal	Crystal Liquid Air at 1 atmosphere	Differential scanning calorimeter	1
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal	Crystal Liquid Gas	Differential scanning calorimeter	1
POMD	2	Normal melting temperature, K ; Crystal	Crystal Liquid Air at 1 atmosphere	Differential scanning calorimeter	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal	Crystal Liquid Gas	Differential scanning calorimeter	1
POMD	3	Normal melting temperature, K ; Crystal	Crystal Liquid Air at 1 atmosphere	Differential scanning calorimeter	1
POMD	3	Molar enthalpy of transition or fusion, kJ/mol ; Crystal	Crystal Liquid Gas	Differential scanning calorimeter	1
POMD	4	Normal melting temperature, K ; Crystal	Crystal Liquid Air at 1 atmosphere	Differential scanning calorimeter	1
POMD	4	Molar enthalpy of transition or fusion, kJ/mol ; Crystal	Crystal Liquid Gas	Differential scanning calorimeter	1
POMD	5	Normal melting temperature, K ; Crystal	Crystal Liquid Air at 1 atmosphere	Differential scanning calorimeter	1
POMD	5	Molar enthalpy of transition or fusion, kJ/mol ; Crystal	Crystal Liquid Gas	Differential scanning calorimeter	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Study of the stability of 5,10,15,20-tetraphenylporphine (TPP) and metalloporphyrins NiTPP, CoTPP, CuTPP, and ZnTPP by differential scanning calorimetry and thermogravimetry

Gamboa, M.[Minerva], Campos, M.[Myriam], Torres, L. A.[Luis Alfonso]

ABSTRACT