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Название: Validation of ‘lock-and-key' mechanism of a metal-organic framework in selective sensing of triethylamine
Авторы: Vellingiri, K.
Boukhvalov, D. W.
Kim, K. -H.
Philip, L.
Дата публикации: 2019
Издатель: Royal Society of Chemistry (RSC)
Библиографическое описание: Validation of ‘lock-and-key' mechanism of a metal-organic framework in selective sensing of triethylamine / K. Vellingiri, D. W. Boukhvalov, K. -H. Kim, et al. // RSC Advances. — 2019. — Vol. 9. — Iss. 14. — P. 7818-7825. — DOI: 10.1039/c8ra10637a.
Аннотация: To develop the metal-organic framework (MOF)-based sensing of triethylamine (TEA) in an aqueous phase, Al-MIL-101-NH2 (MIL: Material Institute Lavoisier) with a tripod-like cavity was utilized based on a lock-and-key model. Al-MIL-101-NH2 (Al-MOF) was found to be an excellent fluorescent sensor for the TEA molecules in the range of 0.05-0.99 mM. The limit of detection (LOD) and linear calibration range of this probe towards TEA were found to be 3 μM and 0.05-0.40 mM, respectively. The mechanism of the sensing process indicates the dominant role of physical processes (e.g., non-covalent bond interactions). In addition, the exact fit of the TEA molecule (6.5 Å) in the tripod-like cavity (6.78 Å) supported the strong interaction between three ethyl groups (TEA) and aromatic rings (MOF). This kind of specific suitability between size/shape of the TEA and tripod-like cavity of MOF (ΔG: −46.7 kJ mol−1) was not found in other molecules such as ethylamine (ΔG: −2.20 kJ mol−1 and size: 3.7 Å), formaldehyde (ΔG: +1.50 kJ mol−1 and size: 2.8 Å), and ammonia (ΔG: +0.71 kJ mol−1 and size: 1.6 Å). As such, Al-MOF was found to be a selective and stable sensor for TEA. © The Royal Society of Chemistry.
Ключевые слова: AMMONIA
CRYSTALLINE MATERIALS
LOCKS (FASTENERS)
ORGANOMETALLICS
FLUORESCENT SENSORS
LIMIT OF DETECTION
LINEAR CALIBRATION
METAL ORGANIC FRAMEWORK
PHYSICAL PROCESS
SELECTIVE SENSING
SENSING PROCESS
STRONG INTERACTION
MOLECULES
URI: http://elar.urfu.ru/handle/10995/73986
Условия доступа: cc-by-nc
Идентификатор SCOPUS: 85062936527
Идентификатор WOS: 000462646000030
Идентификатор PURE: 9168166
ISSN: 2046-2069
DOI: 10.1039/c8ra10637a
Сведения о поддержке: The rst author KV acknowledges Department of Science and Technology (DST) for providing Nano science and Technology (NST) post-doctoral fellowship (JNC/AO/A.0610(36)2017-2620) and the corresponding author acknowledge Department of Science and Technology (DST), Government of India for providing research funding DST/TN/WTI/WIC/2K17/82.
Располагается в коллекциях:Научные публикации, проиндексированные в SCOPUS и WoS CC

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