Selective and reversible recognition of Hg ions by Tetrathia[22]porphyrin(2.1.2.1).

Interestingly, neutral tetrathia[22]porphyrin(2.1.2.

Sultam-Based Hetero[5]helicene: Synthesis, Structure, and Crystallization-Induced Emission Enhancement.

A deep-blue-emitting sultam-based hetero[5]helicene was synthesized in four steps, and its crystal structure and physical properties were characterized. The helicene displays more than two-fold crystallization-induced emission enhancement as well as atypical blue-shifting of its solid-state emission relative to the solution phase. This rapid synthesis of an unusual sulfonamide-based helicene fluorophore is expected to generate new molecular design options that will help address the ongoing challenges associated with designing pure-blue emitters for organic optoelectronic and sensing applications.

Neutral tetrathia[22]annulene[2.1.2.1] based field-effect transistors: improved on/off ratio defies ring puckering.

New, neutral, slightly puckered aromatic meso-substituted tetrathia[22]annulene[2.1.2.

Oxygen bridged neutral annulenes: a novel class of materials for organic field-effect transistors.

New, neutral, meso-substituted tetraoxa[22]annulene[2,1,2,1] aromatic macrocycles are synthesised and disclosed as new p-type semiconductors with reproducible bulk-like carrier mobility (as high as 0.40 cm(2) V(-1) s(-1)) on highly crystalline thin films deposited on octadecyltrichlorosilane modified SiO(2).