Elaboration of multimodal ligands based on BOX units: Toward full zinc release in Zn(II) complexes by external stimulation. (September 2021)

• Record Type: Journal Article
• Authors: Aidibi, Youssef; Allain, Magali; El-Ghayoury, Abdelkrim; Leriche, Philippe; Sanguinet, Lionel
• Is Part Of: Dyes and pigments. Volume 193(2021)
• Publication Date: 2021-09
• Subjects: Photoresponsiveness -- Electrochomism -- Halochromism -- Zinc complex; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109476
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The development of molecular switches such as photochromic and electrochromic systems still represents a major concern in numerous application fields. If numerous pure organic switch families have been explored so far, concerning the coordination compounds, the choice seems more limited. In this context, we are exploring the possibility to elaborate a new addressable ligand family based on benzazolo-oxazolidine (BOX) moiety, a poorly investigated switch family, known for its acido-, electro- and photochromism properties. As proof of concept, two ligands bearing a BOX moiety were prepared using a pyridine as metal binding site after what corresponding Zn(II) complexes were synthesized and characterized. The acido-, electro- and photochemical behaviors of the free ligand as well as complexes were studied. This study reveals a subtle and interesting tautomeric equilibrium between oxazolidine ring opening and pyridine protonation whatever the nature of the stimulation. More interestingly, it conducts to observe the possibility to catch and release zinc ion on demand by using two external and orthogonal stimulations. Graphical abstract: Image 1 Highlights: The synthesis of new multi-addressable ligands based on BOX unit is proposed. Easy functionalization of aromatic nitrogen heterocycle by indolino-oxazolidine moiety. Zn(II) complexes including multi-addressable BOX unit have been prepared. Zn(II) ions release in BOX based complex by using different kind of stimulation.