Synthesis and photochromism of a new binuclear porphyrazinato magnesium(II)

The synthesis, characterization and photochromism of a new coplanar binuclear porphyrazine bearing six bis-(trimethylthiophenyl) photochromic functionalities at the periphery are described. The synthetic route is concise and the near-infrared luminescence changes of this binuclear porphyrazine can be regulated in a reversible manner by the photoisomerization of the bisthienylethene moiety.