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

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

63 Citations (Scopus)

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.

Original language	English
Pages (from-to)	2151-2156
Number of pages	6
Journal	Chemical Science
Volume	7
Issue number	3
DOIs	https://doi.org/10.1039/c5sc04091d https://doi.org/10.1039/c5sc04091d
Publication status	Published - 1 Mar 2016

ASJC Scopus subject areas

General Chemistry

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http://hdl.handle.net/10397/60975

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@article{4fdd03d38d5740a1b499d11654117bd2,

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

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.",

author = "Zhenhao Liang and Tsoi, \{Tik Hung\} and Chan, \{Chi Fai\} and Lixiong Dai and Yudan Wu and Guangyan Du and Lizhi Zhu and Lee, \{Chi Sing\} and Wong, \{Wing Tak\} and Law, \{Ga Lai\} and Wong, \{Ka Leung\}",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2016.",

year = "2016",

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doi = "10.1039/c5sc04091d",

language = "English",

volume = "7",

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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

PY - 2016/3/1

Y1 - 2016/3/1

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.

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.

UR - https://www.scopus.com/pages/publications/84959386364

U2 - 10.1039/c5sc04091d

DO - 10.1039/c5sc04091d

M3 - Journal article

SN - 2041-6520

VL - 7

SP - 2151

EP - 2156

JO - Chemical Science

JF - Chemical Science

IS - 3

ER -

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

Abstract

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