A smart "off-on" gate for the in situ detection of hydrogen sulphide with Cu(ii)-assisted europium emission

Zhenhao Liang; Tik-Hung Tsoi; Chi-Fai Chan; Lixiong Dai; Yudan Wu; Guangyan Du; Lizhi Zhu; Chi-Sing Lee; Wing-Tak Wong; Ga-Lai Law; Ka-Leung Wong

doi:10.1039/c5sc04091d

A smart "off-on" gate for the in situ detection of hydrogen sulphide with Cu(ii)-assisted europium emission

Zhenhao Liang, Tik-Hung Tsoi, Chi-Fai Chan, Lixiong Dai, Yudan Wu, Guangyan Du, Lizhi Zhu, Chi-Sing Lee, Wing-Tak Wong, Ga-Lai Law, Ka-Leung Wong

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

A water-soluble and emissive Eu-complex (EuL1) bearing a DO3A(Eu³⁺)-pyridine-aza-crown motif has been prepared and its Cu²⁺ complex has been demonstrated to be a smart luminescence "off-on" gate for H₂S detection in water with a nano-molar detection limit (60 nM). EuL1 binds to Cu²⁺ ions selectively (K_B = 1.2 × 10⁵ M^-1) inducing 17-fold luminescence quenching and forming a 1 : 1 stoichiometric complex (EuL1-Cu²⁺), which responds to H₂S selectively with restoration of the original Eu emission of EuL1 followed by a further 40-fold luminescence enhancement, forming a 1 : 1 stoichiometric complex (EuL1-Na₂S, K_B = 1.5 × 10⁴ M^-1). Without Cu²⁺ ions, EuL1 showed non-specific binding towards H₂S with only a 5-fold luminescence enhancement. © The Royal Society of Chemistry 2016.

Original language	English
Pages (from-to)	2151-2156
Journal	Chemical Science
Volume	7
Issue number	3
DOIs	https://doi.org/10.1039/c5sc04091d
Publication status	Published - 1 Mar 2016
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work is funded by the Peking University Shenzhen Graduate School (Key State Laboratory of Chemical Genomics open-project fellowship program), grants from Shenzhen Science, Technology Innovation Committee (KQTD201103), Nanshan (KC2014ZDZJ0026A), Hong Kong Baptist University (HKBU) (FRG2/14-15/013013), Hong Kong Polytechnic University (HKPolyU), Hong Kong Research Grants Council (HKBU 203012), Hong Kong Polytechnic University central Research Grant (G-UC08), Natural Science Foundation of China (21401158) and HKBU and HKPolyU Joint Research Programme (RC-ICRS/15-16/02F-WKL02F-WKL).

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This full text is made available under CC-BY 3.0. https://creativecommons.org/licenses/by/3.0/

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abstract = "A water-soluble and emissive Eu-complex (EuL1) bearing a DO3A(Eu3+)-pyridine-aza-crown motif has been prepared and its Cu2+ complex has been demonstrated to be a smart luminescence {"}off-on{"} gate for H2S detection in water with a nano-molar detection limit (60 nM). EuL1 binds to Cu2+ ions selectively (KB = 1.2 × 105 M-1) inducing 17-fold luminescence quenching and forming a 1 : 1 stoichiometric complex (EuL1-Cu2+), which responds to H2S selectively with restoration of the original Eu emission of EuL1 followed by a further 40-fold luminescence enhancement, forming a 1 : 1 stoichiometric complex (EuL1-Na2S, KB = 1.5 × 104 M-1). Without Cu2+ ions, EuL1 showed non-specific binding towards H2S with only a 5-fold luminescence enhancement. {\textcopyright} The Royal Society of Chemistry 2016.",

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T1 - A smart "off-on" gate for the in situ detection of hydrogen sulphide with Cu(ii)-assisted europium emission

AU - Liang, Zhenhao

AU - Tsoi, Tik-Hung

AU - Chan, Chi-Fai

AU - Dai, Lixiong

AU - Wu, Yudan

AU - Du, Guangyan

AU - Zhu, Lizhi

AU - Lee, Chi-Sing

AU - Wong, Wing-Tak

AU - Law, Ga-Lai

AU - Wong, Ka-Leung

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N2 - A water-soluble and emissive Eu-complex (EuL1) bearing a DO3A(Eu3+)-pyridine-aza-crown motif has been prepared and its Cu2+ complex has been demonstrated to be a smart luminescence "off-on" gate for H2S detection in water with a nano-molar detection limit (60 nM). EuL1 binds to Cu2+ ions selectively (KB = 1.2 × 105 M-1) inducing 17-fold luminescence quenching and forming a 1 : 1 stoichiometric complex (EuL1-Cu2+), which responds to H2S selectively with restoration of the original Eu emission of EuL1 followed by a further 40-fold luminescence enhancement, forming a 1 : 1 stoichiometric complex (EuL1-Na2S, KB = 1.5 × 104 M-1). Without Cu2+ ions, EuL1 showed non-specific binding towards H2S with only a 5-fold luminescence enhancement. © The Royal Society of Chemistry 2016.

AB - A water-soluble and emissive Eu-complex (EuL1) bearing a DO3A(Eu3+)-pyridine-aza-crown motif has been prepared and its Cu2+ complex has been demonstrated to be a smart luminescence "off-on" gate for H2S detection in water with a nano-molar detection limit (60 nM). EuL1 binds to Cu2+ ions selectively (KB = 1.2 × 105 M-1) inducing 17-fold luminescence quenching and forming a 1 : 1 stoichiometric complex (EuL1-Cu2+), which responds to H2S selectively with restoration of the original Eu emission of EuL1 followed by a further 40-fold luminescence enhancement, forming a 1 : 1 stoichiometric complex (EuL1-Na2S, KB = 1.5 × 104 M-1). Without Cu2+ ions, EuL1 showed non-specific binding towards H2S with only a 5-fold luminescence enhancement. © The Royal Society of Chemistry 2016.

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M3 - RGC 21 - Publication in refereed journal

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A smart "off-on" gate for the in situ detection of hydrogen sulphide with Cu(ii)-assisted europium emission

Abstract

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