7-Diethylamino-3-thenoylcoumarin

7-Diethylamino-3-thenoylcoumarin (CAS 77820-11-2) is a high-performance fluorescent coumarin derivative engineered for laser dye applications, optoelectronic materials, and biological imaging. This molecule integrates a 7-diethylaminocoumarin core—a privileged fluorophore scaffold known for high quantum yield and photostability—with a 3-thenoyl substituent containing a sulfur-bearing thiophene ring. The introduction of the thenoyl group at the C3 position extends the π-conjugation system, resulting in red-shifted absorption and emission profiles compared to standard 3-acylcoumarins, while the diethylamino donor at C7 enhances intramolecular charge transfer (ICT) efficiency. This intermediate is particularly valuable for constructing tunable laser dyes, fluorescent probes for protein labeling, and organic light-emitting diode (OLED) materials where sulfur-heterocycle integration modulates electronic properties and solvatochromic behavior. Manufactured with purity ≥98-99% under controlled conditions, it supports research programs requiring precise wavelength control and robust fluorescence performance in complex media.