التفاصيل البيبلوغرافية
| العنوان: |
Azocalix[4]arene-Rhodamine Supramolecular Hypoxia-Sensitive Systems: A Search for the Best Calixarene Hosts and Rhodamine Guests |
| المؤلفون: |
Diana Mironova, Vladimir Burilov, Farida Galieva, Mohamed Ali Mohamed Khalifa, Sofia Kleshnina, Alsu Gazalieva, Ramil Nugmanov, Svetlana Solovieva, Igor Antipin |
| المصدر: |
Molecules, Vol 26, Iss 18, p 5451 (2021) |
| بيانات النشر: |
MDPI AG, 2021. |
| سنة النشر: |
2021 |
| المجموعة: |
LCC:Organic chemistry |
| مصطلحات موضوعية: |
calixarene, hypoxia sensing, host-guest complex, Organic chemistry, QD241-441 |
| الوصف: |
A potential hypoxia-sensitive system host-guest complex of three calixarenes (including two with four anionic carboxyl and sulphonate azo fragments on the upper rim and a newly synthesized bis-azo adduct of calixarene in the cone configuration with azo fragments on the lower rim with the most widespread cationic and zwitterionic rhodamine dyes (123, 6G and B)) was studied using UV-VIS spectrometry and fluorescence as well as 1D and 2D NMR techniques. It was found that all three calixarenes form a complex with rhodamine dyes with a 1:1 composition. The association constants of calixarene-dye complexes with sulfonate calixarenes, especially in the case of tetra-anionic calixarene, turned out to be higher compared with carboxyl calixarene due to the more intense electrostatic interactions. For the first time using an HRESI MS technique, it was shown that the treatment of rhodamine 6G and 123 with sodium dithionite (SDT) produces a non-fluorescent leuco form of the dye, and only rhodamine B can be used with SDT without the occurrence of a side reduction. Moreover, it was identified that in addition to the reduction in the azo groups, SDT causes partial cleavage of the aryl ether bonds. The found features of SDT should be taken into account when SDT is used as an azoreductase mimic. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
1420-3049 |
| Relation: |
https://www.mdpi.com/1420-3049/26/18/5451; https://doaj.org/toc/1420-3049 |
| DOI: |
10.3390/molecules26185451 |
| URL الوصول: |
https://doaj.org/article/6b180a2b1cfd4ca6aa5ee8d8ea20fc83 |
| رقم الانضمام: |
edsdoj.6b180a2b1cfd4ca6aa5ee8d8ea20fc83 |
| قاعدة البيانات: |
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