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- Title
Modulating the Inclusive and Coordinating Ability of Thiacalix[4]arene and Its Antenna Effect on Yb 3+ -Luminescence via Upper-Rim Substitution.
- Authors
Podyachev, Sergey N.; Sudakova, Svetlana N.; Zairov, Rustem R.; Syakaev, Victor V.; Masliy, Alexey N.; Dusek, Michal; Gubaidullin, Aidar T.; Dovzhenko, Alexey P.; Buzyurova, Daina N.; Lapaev, Dmitry V.; Mambetova, Gulnaz Sh.; Babaev, Vasily M.; Kuznetsov, Andrey M.; Mustafina, Asiya R.
- Abstract
The present work introduces the series of thiacalix[4]arenes (H4L) bearing different upper-rim substituents (R = H, Br, NO2) for rational design of ligands providing an antenna-effect on the NIR Yb3+-centered luminescence of their Yb3+ complexes. The unusual inclusive self-assembly of H3L− (Br) through Br...π interactions is revealed through single-crystal XRD analysis. Thermodynamically favorable formation of dimeric complexes [2Yb3+:2HL3−] leads to efficient sensitizing of the Yb3+ luminescence for H4L (Br, NO2), while poor sensitizing is observed for ligand H4L (H). X-ray analysis of the single crystal separated from the basified DMF solutions of YbCl3 and H4L(NO2) has revealed the transformation of the dimeric complexes into [4Yb3+:2L4−] ones with a cubane-like cluster structure. The luminescence characteristics of the complexes in the solutions reveal the peculiar antenna effect of H4L(R = NO2), where the triplet level at 567 nm (17,637 cm−1) arisen from ILCT provides efficient sensitizing of the Yb3+ luminescence.
- Subjects
ANTENNAS (Electronics); LIGANDS (Biochemistry); SINGLE crystals; LUMINESCENCE; X-rays
- Publication
Molecules, 2022, Vol 27, Issue 20, p6793
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules27206793