1618110-52-3Relevant academic research and scientific papers
Fluorescent 2-(2′-hydroxybenzofuran)benzoxazole (HBBO) borate complexes: Synthesis, optical properties, and theoretical calculations
Massue, Julien,Benelhadj, Karima,Chibani, Siwar,Le Guennic, Boris,Jacquemin, Denis,Retailleau, Pascal,Ulrich, Gilles,Ziessel, Raymond
, p. 4136 - 4140 (2014/07/22)
The multi-step synthesis, structural and optical properties of original luminescent borate complexes derived from 2-(2′-hydroxybenzofuran) benzoxazole (HBBO) are reported. Functionalization at position 3 of the benzofuran ring was readily achieved through an electrophilic cyclization key step followed by a Sonogashira cross-coupling reaction. The optical properties of the resulting boron difluoride dyes highlight different photophysical behaviors depending on the nature of the substitution at position 3 of the benzofuran core (tBu-phenylacetylene or NnBu 2-phenylacetylene). The NnBu2-phenylacetylene moiety favors a sizeable intramolecular charge transfer as evidenced by a strong solvatochromism; a feature further confirmed by ab initio calculations.
