From Textile Coloring to Light‐emitting Electrochemical Devices: Upcycling of the Isoviolanthrone Vat Dye

Major environmental pollutants, vat dyes nonetheless represent ideal and accessible candidates for chemical upcycling since produced at ton-scale and usually composed of large π-conjugated scaffolds. In this context, we report herein a successful example of valorization of dye contaminated wastewaters through a one-pot sequential functionalization of the vat violet 10’s leuco form and embedment of the resulting readily soluble compound, as active material, in light-emitting electrochemical cells.

Abstract

Produced at ton scale, vat dyes are major environmental pollutants generated by the textile industry. However, they represent ideal and accessible candidates for chemical upcycling since they are usually composed of large π-conjugated scaffolds. Based on the valorization of “old” products, waste or even contaminant into high-added value goods, this concept can be easily transposed to the laboratories. As a contribution to the current environmental and ecological transition, we demonstrate herein the valorization/upcycling of wastewaters generated during the dyeing procedure. To do so, the reduced (leuco) form of vat violet 10, also known as isoviolanthrone, was functionalized to afford a readily soluble derivative that was subsequently and successfully used as active material in operating solution processed light-emitting electrochemical cells, that is, from textile dyeing to high-tech application.

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