The first hexadithienylethene-substituted tris(bipyridine)metal complexes as quadratic NLO photoswitches: combined experimental and DFT studies.
Journal article published in 2013 by
Lucie Ordronneau,
Vincent Aubert,
Véronique Guerchais 
,
Abdou Boucekkine,
Hubert Le Bozec,
Anu Singh,
Isabelle Ledoux,
Denis Jacquemin
,
Abdou Boucekkine,
Hubert Le Bozec,
Anu Singh,
Isabelle Ledoux,
Denis Jacquemin
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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.