《Fluorescent donor-acceptor psoralen cruciforms by consecutive Suzuki-Suzuki and Sonogashira-Sonogashira one-pot syntheses》 was written by Geenen, Sarah R.; Schumann, Torben; Mueller, Thomas J. J.. Recommanded Product: 4-Ethynylpyridine And the article was included in Journal of Organic Chemistry in 2020. The article conveys some information:
Two novel donor-acceptor cruciform topologies are efficiently synthesized by site-selective Suzuki-Suzuki and Sonogashira-Sonogashira multicomponent reactions starting from a bromo-triflato-functionalized psoralen scaffold. In addition to tunability of photophys. properties, such as absorption and emission, many derivatives possess partially high relative fluorescence quantum yields in solution and fluoresce strongly in the solid state. Addnl., the promising compounds show solvatochromism and acidochromic effects. In addition, 8-p-anisyl-5-p-cyanophenyl-substituted psoralen exhibits aggregation-induced emission properties. Exptl. (applying the Lippert-Mataga model) and computationally (TD-DFT calculations), the pronounced charge transfer character of the longest wavelength absorption band was confirmed. In the experiment, the researchers used 4-Ethynylpyridine(cas: 2510-22-7Recommanded Product: 4-Ethynylpyridine)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Recommanded Product: 4-Ethynylpyridine