Triplet-triplet sensitizing within pyrene-based COO-BODIPY: a breaking molecular platform for annihilating photon upconversion.

We envisioned a new approach for achieving triplet-triplet annihilation-assisted photon upconversion based on the rational design of a heavy-atom-free, all-organic and photoactivatable triplet-triplet synergistic multichromophoric molecular assembly. This single molecular architecture is easily built by covalently anchoring triplet-annihilator units (pyrenes) to a triplet-photosensitizer moiety (BODIPY), to improve the effectiveness and probability of the required triplet-triplet energy transfer and the ulterior triplet-triplet annihilation. This unprecedented design takes advantage of the high synthetic accessibility and chemical versatility of the -BODIPY scaffold.

[Endoscopic tunneling procedures in achalasia and gastroparesis].

Since the first publication of peroral endoscopic myotomy (POEM) by Haruhiro Inoue et al. in 2008 in Japan, various novel endoscopic procedures have been established, which are performed after iatrogenic creation of a submucosal tunnel as a "new space" 1. Through the artificially formed access in the tela submucosa, interventions in the muscular layer of the esophagus and stomach can be performed while carefully sparing the mucosal layer 2.

Multichromophoric COO-BODIPYs: an advantageous design for the development of energy transfer and electron transfer systems.

COO-BODIPYs are highlighted as cutting edge scaffolds for easy access to a new generation of multichromophoric architectures with enhanced (photo)chemical stability, showing either boosted capability for excitation energy transfer, glow fluorescence and laser emission, or photoinduced electron transfer. The new finding paves the way for the rapid development of smarter organic dyes for advancing photonics and optoelectronics.

BCl-Activated Synthesis of COO-BODIPY Laser Dyes: General Scope and High Yields under Mild Conditions.

A general and straightforward method for the synthesis of COO-BODIPYs from F-BODIPYs and carboxylic acids is established. The method is based on the use of boron trichloride to activate the involved substitution of fluorine, which leads to high yields through rapid reactions under soft conditions. This mild method opens the way to unprecedented laser dyes with outstanding efficiencies and photostabilities, which are difficult to obtain by the current methods.