From: Characterisation of different polymorphs of tris(8-hydroxyquinolinato)aluminium(III) using solid-state NMR and DFT calculations
Model
Isomer
δ iso (ppm)
η Q
χ/MHz
Isolated Molecule
α-Alq3
-
0.77
7.7
δ-Alq3
0.03
7.0
IPCM
0.81
7.2
0.10
5.8