Air-Stable Benzo[ c]thiophene Diimide n-Type π-Electron Core.

In this paper, the molecular design of the first deep-lowest unoccupied molecular orbital (LUMO) level diimide π-electron core, benzo[ c]thiophene diimide (BTDI), as a novel n-type organic semiconductor was determined. An original synthetic sequence was devised to obtain the target cyclohexyl-BTDI (Cy6-BTDI) derivative. Cy6-BTDI demonstrated completely reversible reduction waves and a stable radical anionic state. Favorable brickwork molecular assembly and two-dimensional charge transport properties of Cy6-BTDI were exhibited in the solid state. As a result, air-stable electron mobilities were obtained from the BTDI organic field-effect transistors under ambient conditions.

The Differential Diagnosis of Acute Onset Truncal Ataxia: The Importance of Dysgeusia in Miller Fisher Syndrome.

Miller Fisher syndrome (MFS) can be difficult to diagnose, particularly in mild cases where some of the standard triad of symptoms (external ophthalmoplegia, ataxia, and loss of deep tendon reflex) are absent. We herein report a case of the incomplete form of MFS diagnosed in a 54-year-old Japanese man who presented only with ataxia symptoms and was positive for the anti-GQ1b antibody. However, the patient also suffered from dysgeusia, a significant impairment of taste perception. We propose that dysgeusia in acute-onset ataxia cases may constitute an important clinical feature to aid in the diagnosis of the incomplete form of MFS.