Dipyrrolylquinoxaline-bridged Schiff bases: A new class of fluorescent sensors for mercury(II)

Lei Wang; Xunjin ZHU; Wai Yeung WONG; Jian Ping Guo; Rick W K WONG; Zao Ying Li

doi:10.1039/b505676d

Dipyrrolylquinoxaline-bridged Schiff bases: A new class of fluorescent sensors for mercury(II)

Lei Wang
, Xunjin ZHU
, Wai Yeung WONG
, Jian Ping Guo
, Rick W K WONG^*
, Zao Ying Li

^*Corresponding author for this work

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

59 Citations (Scopus)

Abstract

Novel 2,3-bis(1H-pyrrol-2-yl)quinoxaline-functionalized Schiff bases were prepared and characterized as new fluorescent sensors for mercury(II) ion. The X-ray crystal structures of compounds 4, 5, 4a and 5a were determined. The binding properties of 4 and 5 for cations were examined by UV-vis and fluorescence spectroscopy. The UV-vis and fluorescence data indicate that a 1: 1 stoichiometric complex is formed between compound 4 (or 5) and mercury(II) ion, and the association constant is (3.81 ± 0.7) × 10⁵ M^-1 for 4 and (3.43 ± 0.53) × 10⁵ M ^-1 for 5. The recognition mechanism between compound 4 (or 5) and metal ion was discussed based on their chemical construction and the fluorescence quenching effect when they interact with each other. Competition experiments revealed that compound 4 (or 5) has a highly selective response to mercury(II) ion in aqueous solution.

Original language	English
Pages (from-to)	3235-3240
Number of pages	6
Journal	Dalton Transactions
Issue number	19
DOIs	https://doi.org/10.1039/b505676d
Publication status	Published - 7 Oct 2005

Access to Document

10.1039/b505676d

Cite this

@article{49de073fc82c495582223a211ca8c566,

title = "Dipyrrolylquinoxaline-bridged Schiff bases: A new class of fluorescent sensors for mercury(II)",

abstract = "Novel 2,3-bis(1H-pyrrol-2-yl)quinoxaline-functionalized Schiff bases were prepared and characterized as new fluorescent sensors for mercury(II) ion. The X-ray crystal structures of compounds 4, 5, 4a and 5a were determined. The binding properties of 4 and 5 for cations were examined by UV-vis and fluorescence spectroscopy. The UV-vis and fluorescence data indicate that a 1: 1 stoichiometric complex is formed between compound 4 (or 5) and mercury(II) ion, and the association constant is (3.81 ± 0.7) × 105 M-1 for 4 and (3.43 ± 0.53) × 105 M -1 for 5. The recognition mechanism between compound 4 (or 5) and metal ion was discussed based on their chemical construction and the fluorescence quenching effect when they interact with each other. Competition experiments revealed that compound 4 (or 5) has a highly selective response to mercury(II) ion in aqueous solution.",

author = "Lei Wang and Xunjin ZHU and WONG, \{Wai Yeung\} and Guo, \{Jian Ping\} and WONG, \{Rick W K\} and Li, \{Zao Ying\}",

note = "The authors would like to thank Hong Kong Baptist University (FRG/03-04/II-52), Hong Kong Research Grants Council (HKBU 2038/02P) and National Natural Science Foundation of China (No: 29972035) for financial support.",

year = "2005",

month = oct,

day = "7",

doi = "10.1039/b505676d",

language = "English",

pages = "3235--3240",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "19",

}

TY - JOUR

T1 - Dipyrrolylquinoxaline-bridged Schiff bases

T2 - A new class of fluorescent sensors for mercury(II)

AU - Wang, Lei

AU - ZHU, Xunjin

AU - WONG, Wai Yeung

AU - Guo, Jian Ping

AU - WONG, Rick W K

AU - Li, Zao Ying

N1 - The authors would like to thank Hong Kong Baptist University (FRG/03-04/II-52), Hong Kong Research Grants Council (HKBU 2038/02P) and National Natural Science Foundation of China (No: 29972035) for financial support.

PY - 2005/10/7

Y1 - 2005/10/7

N2 - Novel 2,3-bis(1H-pyrrol-2-yl)quinoxaline-functionalized Schiff bases were prepared and characterized as new fluorescent sensors for mercury(II) ion. The X-ray crystal structures of compounds 4, 5, 4a and 5a were determined. The binding properties of 4 and 5 for cations were examined by UV-vis and fluorescence spectroscopy. The UV-vis and fluorescence data indicate that a 1: 1 stoichiometric complex is formed between compound 4 (or 5) and mercury(II) ion, and the association constant is (3.81 ± 0.7) × 105 M-1 for 4 and (3.43 ± 0.53) × 105 M -1 for 5. The recognition mechanism between compound 4 (or 5) and metal ion was discussed based on their chemical construction and the fluorescence quenching effect when they interact with each other. Competition experiments revealed that compound 4 (or 5) has a highly selective response to mercury(II) ion in aqueous solution.

AB - Novel 2,3-bis(1H-pyrrol-2-yl)quinoxaline-functionalized Schiff bases were prepared and characterized as new fluorescent sensors for mercury(II) ion. The X-ray crystal structures of compounds 4, 5, 4a and 5a were determined. The binding properties of 4 and 5 for cations were examined by UV-vis and fluorescence spectroscopy. The UV-vis and fluorescence data indicate that a 1: 1 stoichiometric complex is formed between compound 4 (or 5) and mercury(II) ion, and the association constant is (3.81 ± 0.7) × 105 M-1 for 4 and (3.43 ± 0.53) × 105 M -1 for 5. The recognition mechanism between compound 4 (or 5) and metal ion was discussed based on their chemical construction and the fluorescence quenching effect when they interact with each other. Competition experiments revealed that compound 4 (or 5) has a highly selective response to mercury(II) ion in aqueous solution.

UR - https://www.scopus.com/pages/publications/26844439903

U2 - 10.1039/b505676d

DO - 10.1039/b505676d

M3 - Journal article

AN - SCOPUS:26844439903

SN - 1477-9226

SP - 3235

EP - 3240

JO - Dalton Transactions

JF - Dalton Transactions

IS - 19

ER -

Dipyrrolylquinoxaline-bridged Schiff bases: A new class of fluorescent sensors for mercury(II)

Abstract

Access to Document

Other files and links

Fingerprint

Cite this