Structure impact in antenna effect of novel upper rim substituted tetra-1,3-diketone calix[4]arenes on Tb(III) green and Yb(III) NIR-luminescence
| Autor: | Svetlana N. Sudakova, Asiya R. Mustafina, Victor V. Syakaev, Rustem Amirov, Il'dar Kh. Rizvanov, Sergey N. Podyachev, Nataliya Shamsutdinova, Rustem Zairov, Vasily M. Babaev, Gulnaz Sh. Gimazetdinova |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Diketone
biology medicine.diagnostic_test 010405 organic chemistry Chemistry Organic Chemistry Inorganic chemistry Infrared spectroscopy Antenna effect 010402 general chemistry Mass spectrometry biology.organism_classification 01 natural sciences Biochemistry 0104 chemical sciences Crystallography Deprotonation Spectrophotometry Drug Discovery medicine Tetra Luminescence |
| Zdroj: | Tetrahedron. 72:2447-2455 |
| ISSN: | 0040-4020 |
| Popis: | Two novel calix[4]arene macrocyclic ligands functionalized with four 1,3-diketone groups at the upper and hydroxyl ( 3 ) or propyloxy-groups ( 6 ) at the lower rims were synthesized and characterized using NMR, IR spectroscopy, mass spectrometry, and elemental analysis. UV–vis spectrophotometry and ESI mass spectrometry studies indicate 1:1 complex formation of ligands 3 and 6 with Ln(III) (Ln=Tb, Yb) in alkaline DMF solutions resulted from coordination of Ln(III) with 1,3-diketonate groups. Luminescence study of Ln(III) complexes with 3 and 6 reveals significant difference in antenna effects of their deprotonated forms on both Tb(III)- and Yb(III)-centered luminescence. Comparison of ligand-centered emission for ligands 3 and 6 points to the latter as more efficient antenna for Tb(III) and Yb(III). Different conformational behavior of ligands 3 and 6 in alkaline media is assumed as a reason for the experimentally observed difference in sensitization pathways in Ln(III) complexes with 3 and 6 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect