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Shokurov AV, Alexandrova AV, Shcherbina MA, Bakirov AV, Rogachev AV, Yakunin SN, Chvalun SN, Arslanov VV, Selektor SL. Supramolecular control of the structure and receptor properties of an amphiphilic hemicyanine chromoionophore monolayer at the air/water interface. SOFT MATTER 2020; 16:9857-9863. [PMID: 33048105 DOI: 10.1039/d0sm01078b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Designing sensors for toxic compounds such as mercury salts in aqueous solutions still remains one of the most pressing tasks of modern chemical research, since many existing systems do not show enough sensitivity and/or response. In this regard, the opportunities offered by supramolecular approaches can be used to improve both these characteristics by creating a new self-organized smart system. Herein, we show that barium cations, that according to the data of X-ray standing waves do not bind directly to the ionophore molecules in the monolayers at the air/water interface, could be used to efficiently preorganize such molecules to achieve supramolecular architecture. We demonstrate that such preorganization ensures both low analyte detection threshold and high fluorescent response. We reveal the interrelation of the monolayer structure and receptor characteristics of a sensory system and show that such cation-induced preorganization in Langmuir monolayers of a hemicyanine dithia-aza-crown-substituted chromoionophore inhibits the formation of non-fluorescent aggregates with low receptor function, and allows the quantitative detection of mercury cations using a ratiometric fluorometric approach.
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Affiliation(s)
- Alexander V Shokurov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Leninsky pr. 31-4, Moscow, 119071, Russia.
| | - Alvina V Alexandrova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Leninsky pr. 31-4, Moscow, 119071, Russia.
| | - Maxim A Shcherbina
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, Profsoyuznaya 70, Moscow, 117393, Russia and Moscow Institute of Physics and Technology, 4 Institutsky line, 141700 Dolgoprudny, Moscow region, Russian Federation
| | - Artem V Bakirov
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, Profsoyuznaya 70, Moscow, 117393, Russia
| | - Alexander V Rogachev
- Kurchatov Institute, National Research Centre Kurchatov Institute, 1 Kurchatov square, 123098 Moscow, Russian Federation
| | - Sergey N Yakunin
- Kurchatov Institute, National Research Centre Kurchatov Institute, 1 Kurchatov square, 123098 Moscow, Russian Federation
| | - Sergey N Chvalun
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, Profsoyuznaya 70, Moscow, 117393, Russia and Kurchatov Institute, National Research Centre Kurchatov Institute, 1 Kurchatov square, 123098 Moscow, Russian Federation
| | - Vladimir V Arslanov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Leninsky pr. 31-4, Moscow, 119071, Russia.
| | - Sofiya L Selektor
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Leninsky pr. 31-4, Moscow, 119071, Russia.
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