Wydział Chemii

Bartłomiej Potaniec

Maria Zdończyk

Joanna Cybińska

2022

Molecules

27

3092/1-3092/15

10.3390/molecules27103092

Naukowa

Angielski

Artykuł

In this study, we demonstrate six novel xanthene derivatives and their spectroscopic and chemical properties. The presented synthesis examination allowed us to obtain two different compounds during one step, with open and closed lactone rings substituted with different length alkyl chains. Increasing the reaction efficiency to 77% was obtained using the microwave-assisted method. Moreover, the modification of O-alkylation synthesis in an ecofriendly way using a ball mill led to achieving exclusively one opened ring product. All of the synthesized compounds showed different spectroscopic behaviors in comparison with the different organic dyes; the typical concentration quenching of luminescence was not observed. The relationship between the length of the alkyl chain and the time of luminescence decay is presented. Synthetized closed forms of dyes turned out to be promising leuco dyes. For the first time, an ionic liquid was used as a developer of synthesized xanthene derivatives (as leuco dyes), which led to obtaining an irreversible thermochromic marker.

fluoran leuco dye, xanthene dyes, luminescence, synthesis optimization, thermochromic materials, ionic liquid

CC-BY

https://doi.org/10.3390/molecules27103092

http://www.mdpi.com/journal/metals