The Judd-Ofelt Spectroscopy (JOYSpectra) program [1, 2] was built to use the SOM and BOM models, taking into consideration covalency effects to the Ln-L bonds. Also, the charge factors calculations using the pseudo-diatomic approach [3] is available in JOYSpectra. The program intends to be useful to theoreticians as well as experimentalists, it is free of charge and has relevant features that facilitate a better understanding of the chemical-physics information behind the intensity parameters.
Manipulate geometry, to produce specific symmetry changes (natural distortions and vibrational or thermal effects), and to follow the intensity parameters variations with the coordination geometry changes.
The program also provides the symmetry point group of the coordination polyhedron according to the input geometry and in each step of a specific geometry variation.
The overlap polarizabilities are automatically calculated using the input geometry and internal parameters.
The charge factors and effective ligand polarizabilities quantities can be adjusted within physically reasonably acceptable values, to reproduce, as close as possible, the experimental omega values.
JOYSpectra web platform is able to produce the necessary data of overlap polarizability and ligand effective polarizability, using external programs.
Intramolecular Energy Transfer (IET) rates calculation [4]. The JOYSpectra web platform has the capability to calculate up Ln3+ 251 energy levels, including: Pr3+ (12 energy levels), Nd3+ (20 energy levels), Pm3+ (29 energy levels), Sm3+ (34 energy levels), Eu3+ (20 energy levels), Gd3+ (13 energy levels), Tb3+ (39 energy levels), Dy3+ (21 energy levels), Ho3+ (35 energy levels), Er3+ (15 energy levels), Tm3+ (12 energy levels), Yb3+ (1 energy levels)