ABSTRACT

Three new solid ternary lanthanide complexes of [Ln(2-Cl-4-FBA)3phen]2 (Ln = Eu3+(1), Tb3+(2), Ho3+(3), 2-Cl-4-FBA = 2-chloro-4-fluorobenzoate, phen = 1,10-phenanthroline) were synthesized and characterized by means of elemental analysis, IR and UV spectra and XRD. The complexes 1 and 2 emit bright red and green luminescence respectively under the excitation ultraviolet light at room temperature. Thermal analyses of the three complexes were discussed by TG-DTG and IR techniques. The heat capacities of the complexes were measured in from 259.15 to 493.02 K by means of Differential scanning calorimetry (DSC). The relationship of the molar heat capacities varying with the reduced temperature x (x = [T-(Tmax+Tmin)/2]/[(Tmax-Tmin)/2]) was fitted to a polynomial equation with the leastsquares method for each complex. Finally, the derived thermodynamic functions (HT-H298.15), (ST-S298.15) and (GT-G298.15) of the complexes relative to the standard reference temperature 298.15 K were also obtained on the base of the fitted polynomials.

Compounds

#	Formula	Name
1	C66H34Cl6Eu2F6N4O12	europium 2-chloro-4-fluorobenzoate, 1,10-phenanthroline complex (2:2)
2	C66H34Cl6F6N4O12Tb2	terbium 2-chloro-4-fluorobenzoate, 1,10-phenanthroline complex (2:2)
3	C66H34Cl6F6Ho2N4O12	holmium 2-chloro-4-fluorobenzoate, 1,10-phenanthroline complex (2:2)

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	Small sample (50 mg) DSC	25
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	25
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) 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	Small sample (50 mg) DSC	25
POMD	2	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	25
POMD	2	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) 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	Small sample (50 mg) DSC	25
POMD	3	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	25
POMD	3	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	25

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Preparation, luminescence and thermal properties of lanthanide complexes with 2-chloro-4-fluorobenzoic acid

Wang, J.-F.[Juan-Fen], Meng, F.-T.[Fan-Tao], Xu, S.-L.[Su-Ling], Zhang, J.-J.[Jian-Jun]

ABSTRACT