Crystal structure and luminescence properties of 2-[(2',6'-dimeth-oxy-2,3'-bipyridin-6-yl)-oxy]-9-(pyridin-2-yl)-9-carbazole.

In the title com-pound, CHNO, the carbazole system forms a dihedral angle of 68.45 (3)° with the mean plane of the bi-pyridine ring system. The bi-pyridine ring system, with two meth-oxy substituents, is approximately planar (r.m.s. deviation = 0.0670 Å), with a dihedral angle of 7.91 (13)° between the planes of the two pyridine rings. Intra-molecular C-H⋯O/N hydrogen bonds may promote the planarity of the bipyridyl ring system. In the pyridyl-substituted carbazole fragment, the pyridine ring is tilted by 56.65 (4)° with respect to the mean plane of the carbazole system (r.m.s. deviation = 0.0191 Å). In the crystal, adjacent mol-ecules are connected C-H⋯O/N hydrogen bonds and C-H⋯π inter-actions, resulting in the formation of a three-dimensional (3D) supra-molecular network. In addition, the 3D structure contains inter-molecular π-π stacking inter-actions, with centroid-centroid distances of 3.5634 (12) Å between pyridine rings. The title com-pound exhibits a high energy gap (3.48 eV) and triplet energy (2.64 eV), indicating that it could be a suitable host material in organic light-emitting diode (OLED) applications.