Going beyond the borders: pyrrolo[3,2-]pyrroles with deep red emission.

A two-step route to strongly absorbing and efficiently orange to deep red fluorescent, doubly B/N-doped, ladder-type pyrrolo[3,2-]pyrroles has been developed. We synthesize and study a series of derivatives of these four-coordinate boron-containing, nominally quadrupolar materials, which mostly exhibit one-photon absorption in the 500-600 nm range with the peak molar extinction coefficients reaching 150 000, and emission in the 520-670 nm range with the fluorescence quantum yields reaching 0.90.

Rare Case of Hepatic Artery Pseudoaneurysm.

Hepatic artery aneurysms are rare, but potentially life-threatening vascular pathologies. They are usually discovered incidentally during imaging diagnostics of different pathologies. The study presented a rare case of hepatic artery pseudoaneurym with a fistula to the left branch of the portal vein.