A reaction-based luminescent switch-on sensor for the detection of OH- ions in simulated wastewater

Chun Wu; Kasipandi Vellaisamy; Guanjun Yang; Zhen Zhen Dong; Chung Hang Leung; Jin Biao Liu; Dik Lung Ma

doi:10.1039/c7dt00633k

A reaction-based luminescent switch-on sensor for the detection of OH^- ions in simulated wastewater

Chun Wu, Kasipandi Vellaisamy, Guanjun Yang, Zhen Zhen Dong, Chung Hang Leung, Jin Biao Liu, Dik Lung Ma^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

25 Citations (Scopus)

Abstract

A series of luminescent iridium(iii) complexes were synthesized and evaluated for their ability to interact with hydroxide ions in semi-aqueous media at ambient temperature. Upon the addition of OH^-, a nucleophilic aromatic substitution reaction takes place at the bromine groups of the N^N ligand of complex 1, resulting in the generation of a yellow-green luminescence. Complex 1 showed a 35-fold enhanced emission at pH 14 when compared to neutral pH, and the detection limit for OH^- ions was 4.96 μM. Complex 1 exhibited high sensitivity and selectivity, long-lived luminescence and impressive stability. Additionally, we have demonstrated the practical application of complex 1 to detect OH^- ions in simulated wastewater.

Original language	English
Pages (from-to)	6677-6682
Number of pages	6
Journal	Dalton Transactions
Volume	46
Issue number	20
DOIs	https://doi.org/10.1039/c7dt00633k
Publication status	Published - 2017

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Inorganic Chemistry

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10.1039/c7dt00633k

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@article{6efb7468621a43a087761d514148b7b8,

title = "A reaction-based luminescent switch-on sensor for the detection of OH- ions in simulated wastewater",

abstract = "A series of luminescent iridium(iii) complexes were synthesized and evaluated for their ability to interact with hydroxide ions in semi-aqueous media at ambient temperature. Upon the addition of OH-, a nucleophilic aromatic substitution reaction takes place at the bromine groups of the N^N ligand of complex 1, resulting in the generation of a yellow-green luminescence. Complex 1 showed a 35-fold enhanced emission at pH 14 when compared to neutral pH, and the detection limit for OH- ions was 4.96 μM. Complex 1 exhibited high sensitivity and selectivity, long-lived luminescence and impressive stability. Additionally, we have demonstrated the practical application of complex 1 to detect OH- ions in simulated wastewater.",

author = "Chun Wu and Kasipandi Vellaisamy and Guanjun Yang and Dong, {Zhen Zhen} and Leung, {Chung Hang} and Liu, {Jin Biao} and Ma, {Dik Lung}",

note = "Funding Information: This work is supported by Hong Kong Baptist University (FRG2/15-16/002), the Health and Medical Research Fund (HMRF/14130522), the Research Grants Council (HKBU/12301115, HKBU/204612 and HKBU/201913), the National Natural Science Foundation of China (21575121, 21502075 and 21628502), the Guangdong Province Natural Science Foundation (2015A030313816).",

year = "2017",

doi = "10.1039/c7dt00633k",

language = "English",

volume = "46",

pages = "6677--6682",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "20",

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TY - JOUR

T1 - A reaction-based luminescent switch-on sensor for the detection of OH- ions in simulated wastewater

AU - Wu, Chun

AU - Vellaisamy, Kasipandi

AU - Yang, Guanjun

AU - Dong, Zhen Zhen

AU - Leung, Chung Hang

AU - Liu, Jin Biao

AU - Ma, Dik Lung

N1 - Funding Information: This work is supported by Hong Kong Baptist University (FRG2/15-16/002), the Health and Medical Research Fund (HMRF/14130522), the Research Grants Council (HKBU/12301115, HKBU/204612 and HKBU/201913), the National Natural Science Foundation of China (21575121, 21502075 and 21628502), the Guangdong Province Natural Science Foundation (2015A030313816).

PY - 2017

Y1 - 2017

N2 - A series of luminescent iridium(iii) complexes were synthesized and evaluated for their ability to interact with hydroxide ions in semi-aqueous media at ambient temperature. Upon the addition of OH-, a nucleophilic aromatic substitution reaction takes place at the bromine groups of the N^N ligand of complex 1, resulting in the generation of a yellow-green luminescence. Complex 1 showed a 35-fold enhanced emission at pH 14 when compared to neutral pH, and the detection limit for OH- ions was 4.96 μM. Complex 1 exhibited high sensitivity and selectivity, long-lived luminescence and impressive stability. Additionally, we have demonstrated the practical application of complex 1 to detect OH- ions in simulated wastewater.

AB - A series of luminescent iridium(iii) complexes were synthesized and evaluated for their ability to interact with hydroxide ions in semi-aqueous media at ambient temperature. Upon the addition of OH-, a nucleophilic aromatic substitution reaction takes place at the bromine groups of the N^N ligand of complex 1, resulting in the generation of a yellow-green luminescence. Complex 1 showed a 35-fold enhanced emission at pH 14 when compared to neutral pH, and the detection limit for OH- ions was 4.96 μM. Complex 1 exhibited high sensitivity and selectivity, long-lived luminescence and impressive stability. Additionally, we have demonstrated the practical application of complex 1 to detect OH- ions in simulated wastewater.

UR - http://www.scopus.com/inward/record.url?scp=85021768868&partnerID=8YFLogxK

U2 - 10.1039/c7dt00633k

DO - 10.1039/c7dt00633k

M3 - Journal article

C2 - 28484771

AN - SCOPUS:85021768868

SN - 1477-9226

VL - 46

SP - 6677

EP - 6682

JO - Dalton Transactions

JF - Dalton Transactions

IS - 20

ER -

A reaction-based luminescent switch-on sensor for the detection of OH^- ions in simulated wastewater

Abstract

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