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Keywords:

  • coordination chemistry;
  • density functional calulations;
  • diarylethene;
  • nonlinear optics;
  • photochrome
Thumbnail image of graphical abstract

Flip the NLO switch! A straightforward access to hexadithienylethene-based photochromes by using a coordination-chemistry approach through the combination of bis(dithienylethene)bipyridyl ligands and metal ions (M=Zn, Fe) is reported. The photostability of the isomeric forms of the iron(II) complexes allows the photoswitching of second-order nonlinear optical (NLO) responses (see figure), and the results are rationalized with the help of time-dependent density functional theory.