[reaction: see text] A series of carbazole/fluorene (CBZm-Fn) hybrids were effectively synthesized through Friedel-Crafts-type substitution of the carbazole rings. These compounds were thermally and morphologically stable host materials for OLED applications. Efficient blue phosphorescent OLEDs were obtained when employing CBZ1-F2 as the host and FIrpic as the guest.

The whole mol-ecule of the title compound, C26H16N2S4, is generated by twofold rotational symmetry. The carbazole skeleton is nearly planar [maximum deviation = 0.054 (5) Å]. In the crystal, aromatic π-π stacking is observed between parallel carbazole ring systems of adjacent mol-ecules, the shortest centroid-centroid distances between pyrrole and benzene rings being 3.948 (3) and 3.751 (3) Å.

Novel indolo[3,2-b]carbazole derivatives and a chromogenic-sensing 5,12-dihydroindolo[3,2-b]carbazole have been synthesized starting from tetra-tert-butylated 6,12-diaryl-5,11-dihydroindolo[3,2-b]carbazoles, which were prepared via an efficient tert-butylation of 6,12-diaryl-5,11-dihydroindolo[3,2-b]carbazoles.

The title compound, C(19)H(13)BrFN, was synthesized by N-alkyl-ation of 1-chloro-methyl-4-fluoro-benzene with 3-bromo-9H-carbazole. The carbazole ring system is essentially planar (r.m.s. deviation of 0.024 Å for the non-H atoms) and forms a dihedral angle of 88.2 (3)° with the benzene ring.

The title compound, C(15)H(13)NO(2), was synthesized by N-alkyl-ation of methyl bromo-acetate with 9H-carbazole. The carbazole ring system is essentially planar (mean atomic deviation = 0.0346 Å) and makes a dihedral angle of 86.5 (7)° with the methyl acetate group. Weak inter-molecular C-H⋯O hydrogen bonding is present in the crystal structure.

The title compound, C(19)H(14)BrN, was synthesized by the N-alkyl-ation of (chloro-meth-yl)benzene with 3-bromo-9H-carbazole. The carbazole ring system is essentially planar (r.m.s. deviation = 0.013 Å) and forms a dihedral angle of 87.1 (2)° with the phenyl ring.

In the title compound, C(17)H(14)Br(2)N(2), the carbazole skeleton is nearly planar [maximum deviation = 0.055 (2) Å]. In the crystal, aromatic π-π stacking is observed between parallel carbazole ring systems of adjacent mol-ecules, the shortest centroid-centroid distance between benzene rings being 3.4769 (11) Å.

In the title compound, C(16)H(16)BrN, the tricyclic carbazole system is essentially planar (r.m.s. deviation of all non-H atoms = 0.010 Å). The dihedral angle between the two outer carbazole rings is 1.1 (3)°. There are no directional inter-molecular contacts in the crystal packing.

The asymmetric unit of the title compound, C(19)H(15)N, contains two crystallographically independent mol-ecules. In both mol-ecules, the planar carbazole moieties [maximum deviations = 0.037 (4) and 0.042 (3) Å] are oriented with respect to the adjacent benzene rings, at dihedral angles of 85.29 (8) and 89.89 (7)°, respectively. In the crystal structure, weak C-H⋯π inter-actions are observed i...

Carbazole derivatives have gained a lot of attention in medicinal chemistry over the last few decades due to their wide range biological and pharmacological properties, including antibacterial, antitumor, antioxidant, anti-inflammatory activities. The therapeutic potential natural, semi-synthetic or synthetic carbazole-containing molecules has expanded considerably owing role pathogenesis devel...