Photoswitchable electron-rich phosphines: using light to modulate the electron-donating ability of phosphines.

Florenz Buß,Mowpriya Das,Daniel Janssen-Müller, Alexander Sietmann,Ankita Das,Lukas F B Wilm,Matthias Freitag,Michael Seidl,Frank Glorius,Fabian Dielmann

Chemical communications (Cambridge, England)（2023）

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摘要

The synthesis and properties of photoswitchable electron-rich phosphines containing N-heterocyclic imines equipped with a photochromic dithienylethene unit are reported. Heteronuclear NMR spectroscopy and UV/vis studies reveal that the imine substituents undergo reversible electrocyclic ring-closing and ring-opening reactions upon exposure to UV and visible light, respectively. The photoisomerization alters the electron-donating ability of the phosphines by up to ΔTEP = 8 cm.

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关键词

phosphines,light,electron-rich,electron-donating

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