Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions

Fluorescent metal–organic frameworks (MOFs) are ideal materials for sensors because of their adjustable pore size and functional groups, which provide them with favorable metal ion selective recognition. In this paper, a new cadmium-based MOF was synthesized using Cd(NO<sub>3</sub>)<s...

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Autores principales:	Li-Li Xu, Qiu-Feng Zhang, Dong Wang, Guang-Wei Wu, Hong Cai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	metal–organic frameworks luminescent Fe<sup>3+</sup> recognition high selectivity Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/55cbefb8918342d09702d77a7bf1d936
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spelling	oai:doaj.org-article:55cbefb8918342d09702d77a7bf1d9362021-11-25T18:27:44ZConstruction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions10.3390/molecules262268471420-3049https://doaj.org/article/55cbefb8918342d09702d77a7bf1d9362021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/6847https://doaj.org/toc/1420-3049Fluorescent metal–organic frameworks (MOFs) are ideal materials for sensors because of their adjustable pore size and functional groups, which provide them with favorable metal ion selective recognition. In this paper, a new cadmium-based MOF was synthesized using Cd(NO<sub>3</sub>)<sub>2</sub>·4H<sub>2</sub>O and 3,3′,5,5′-biphenyltetracarboxylic acid by solvothermal method. CdBPTC owned three types of channels with dimensions of approximately 8.4 × 8.3 Å, 6.0 × 5.2 Å, 9.7 × 8.4 Å along a, b, and c axis, respectively. This MOF has high selectivity to ferric ions and shows excellent anti-inference ability toward many other cations. The results indicate that the fluorescence quenching efficiency of CdBPTC is close to 100% when the concentration of Fe<sup>3+</sup> reaches 1.0 × 10<sup>−3</sup> mol·L<sup>−1</sup>. Moreover, the luminescent intensity at 427 nm presents a linear relationship at a concentration range of 2.0 × 10<sup>−4</sup>~7.0 × 10<sup>−4</sup> mol·L<sup>−1</sup>, which can be quantitatively expressed by the linear Stern–Volmer equation I<sub>0</sub>/I = 8489 [Fe<sup>3+</sup>] − 0.1400, which is comparable to the previously reported better-performing materials. Competitive energy absorption and ion exchange may be responsible for the variation in fluorescence intensity of CdBPTC in different Fe<sup>3+</sup> concentrations.Li-Li XuQiu-Feng ZhangDong WangGuang-Wei WuHong CaiMDPI AGarticlemetal–organic frameworksluminescentFe<sup>3+</sup> recognitionhigh selectivityOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6847, p 6847 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	metal–organic frameworks luminescent Fe<sup>3+</sup> recognition high selectivity Organic chemistry QD241-441
spellingShingle	metal–organic frameworks luminescent Fe<sup>3+</sup> recognition high selectivity Organic chemistry QD241-441 Li-Li Xu Qiu-Feng Zhang Dong Wang Guang-Wei Wu Hong Cai Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions
description	Fluorescent metal–organic frameworks (MOFs) are ideal materials for sensors because of their adjustable pore size and functional groups, which provide them with favorable metal ion selective recognition. In this paper, a new cadmium-based MOF was synthesized using Cd(NO<sub>3</sub>)<sub>2</sub>·4H<sub>2</sub>O and 3,3′,5,5′-biphenyltetracarboxylic acid by solvothermal method. CdBPTC owned three types of channels with dimensions of approximately 8.4 × 8.3 Å, 6.0 × 5.2 Å, 9.7 × 8.4 Å along a, b, and c axis, respectively. This MOF has high selectivity to ferric ions and shows excellent anti-inference ability toward many other cations. The results indicate that the fluorescence quenching efficiency of CdBPTC is close to 100% when the concentration of Fe<sup>3+</sup> reaches 1.0 × 10<sup>−3</sup> mol·L<sup>−1</sup>. Moreover, the luminescent intensity at 427 nm presents a linear relationship at a concentration range of 2.0 × 10<sup>−4</sup>~7.0 × 10<sup>−4</sup> mol·L<sup>−1</sup>, which can be quantitatively expressed by the linear Stern–Volmer equation I<sub>0</sub>/I = 8489 [Fe<sup>3+</sup>] − 0.1400, which is comparable to the previously reported better-performing materials. Competitive energy absorption and ion exchange may be responsible for the variation in fluorescence intensity of CdBPTC in different Fe<sup>3+</sup> concentrations.
format	article
author	Li-Li Xu Qiu-Feng Zhang Dong Wang Guang-Wei Wu Hong Cai
author_facet	Li-Li Xu Qiu-Feng Zhang Dong Wang Guang-Wei Wu Hong Cai
author_sort	Li-Li Xu
title	Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions
title_short	Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions
title_full	Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions
title_fullStr	Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions
title_full_unstemmed	Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions
title_sort	construction of a luminescent cadmium-based metal–organic framework for highly selective discrimination of ferric ions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/55cbefb8918342d09702d77a7bf1d936
work_keys_str_mv	AT lilixu constructionofaluminescentcadmiumbasedmetalorganicframeworkforhighlyselectivediscriminationofferricions AT qiufengzhang constructionofaluminescentcadmiumbasedmetalorganicframeworkforhighlyselectivediscriminationofferricions AT dongwang constructionofaluminescentcadmiumbasedmetalorganicframeworkforhighlyselectivediscriminationofferricions AT guangweiwu constructionofaluminescentcadmiumbasedmetalorganicframeworkforhighlyselectivediscriminationofferricions AT hongcai constructionofaluminescentcadmiumbasedmetalorganicframeworkforhighlyselectivediscriminationofferricions
_version_	1718411132240134144

Construction of a Luminescent Cadmium-Based Metal–Organic Framework for Highly Selective Discrimination of Ferric Ions

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