ABSTRACT

Three lanthanide complexes with a general formula [Ln(2,3-DClBA)3phen]2 (Ln = Eu(1), Tb(2), Ho(3); 2,3-DClBA = 2,3-dichlorobenzoate; phen = 1,10-phenanthroline) were synthesized and characterized by elemental analysis, molar conductance, IR and UV spectra and powder X-ray diffraction. The luminescent properties of the complexes 1 and 2 were studied. The thermal behaviors of the complexes were also discussed by TG-DTG and IR techniques. The heat capacities of the complexes were measued from 259.15 to 493.02 K by means of Differential scanning calorimeter. The dependence of heat capacity on the reduce temperature x (x = [T-(Tmax+Tmin)/2]/[(Tmax-Tmin)/2]) was fitted to a polynomial equation with the least squares method for each complex. Furthermore, based on the fitted polynomial, the smoothed heat capacities and the derived thermodynamic functions (HT-H298.15 K), (ST-S298.15 K) and (GT-G298.15 K) in the measured temperature range were obtained with an interval of 10 K.

Compounds

#	Formula	Name
1	C66H34Cl12Eu2N4O12	europium 2,3-dichlorobenzoate, 1,10-phenanthroline complex
2	C66H34Cl12N4O12Tb2	terbium 2,3-dichlorobenzoate, 1,10-phenanthroline complex
3	C66H34Cl12Ho2N4O12	holmium 2,3-dichlorobenzoate, 1,10-phenanthroline complex

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	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	66
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	66
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	2	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	2	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	66
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	3	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25
POMD	3	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Large sample (1 g) DSC	25

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Preparation and thermal properties of lanthanide complexes with 2,3-dichlorobenzoic acid and 1,10-phenanthroline

Wang, J.-F.[Juan-Fen], Ren, N.[Ning], Meng, F.-T.[Fan-Tao], Zhang, J.-J.[Jian-Jun]

ABSTRACT