TY - JOUR
T1 - Naked eye and fluorescent detections of Hg 2+ ions and Cysteine via J-aggregation and deaggregation of a perylene bisimide derivative
AU - Fang, Hsiao Ping
AU - Shellaiah, Muthaiah
AU - Singh, Ashutosh
AU - Raju, Mandapati V.Ramakrishnam
AU - Wu, Yen Hsing
AU - Lin, Hong-Cheu
PY - 2014/4/1
Y1 - 2014/4/1
N2 -
Selective naked eye and fluorescent sensor responses of a 1,6,7,12-tetra(4-tert-butylphenoxy)perylene-3,4:9,10-tetracarboxylic acid bisimide (PBI) derivative are reported for the first time toward Hg
2+
ions and Cysteine (Cys) via J-aggregation and deaggregation mechanisms. The J-aggregation and deaggregation of PBI induced by Hg
2+
and Cys were well established by UV-vis/PL and
1
H NMR titrations. The 1:1 stoichiometry of PBI-Hg
2+
and Cys-Hg
2+
/PBI ensembles were elucidated from the jobs plots based on their UV-vis spectral changes. The linear complex formation by PBI-Hg
2+
ensemble was confirmed through FT-IR and
1
H NMR spectral studies and well supported by its reversible nature upon the addition of pentamethyl diethylene triamine (PMDTA). The positive cooperativities of Hg
2+
and Cys (with PBI) in PBI-Hg
2+
and Cys-Hg
2+
/PBI ensembles were evidenced from the Hill plots based on their fluorescence binding isotherms. The detection limits of Hg
2+
ions and Cys were calculated as 36.6 and 91.3 nM, respectively, by standard deviations and linear fittings of their Stern-Volmer (K
SV
) constants and relative fluorescence intensity changes, respectively. Furthermore, the sensor properties of PBI were well investigated by K
SV
constants, pH values, time effects, and time resolved photoluminescence (TRPL) spectra.
AB -
Selective naked eye and fluorescent sensor responses of a 1,6,7,12-tetra(4-tert-butylphenoxy)perylene-3,4:9,10-tetracarboxylic acid bisimide (PBI) derivative are reported for the first time toward Hg
2+
ions and Cysteine (Cys) via J-aggregation and deaggregation mechanisms. The J-aggregation and deaggregation of PBI induced by Hg
2+
and Cys were well established by UV-vis/PL and
1
H NMR titrations. The 1:1 stoichiometry of PBI-Hg
2+
and Cys-Hg
2+
/PBI ensembles were elucidated from the jobs plots based on their UV-vis spectral changes. The linear complex formation by PBI-Hg
2+
ensemble was confirmed through FT-IR and
1
H NMR spectral studies and well supported by its reversible nature upon the addition of pentamethyl diethylene triamine (PMDTA). The positive cooperativities of Hg
2+
and Cys (with PBI) in PBI-Hg
2+
and Cys-Hg
2+
/PBI ensembles were evidenced from the Hill plots based on their fluorescence binding isotherms. The detection limits of Hg
2+
ions and Cys were calculated as 36.6 and 91.3 nM, respectively, by standard deviations and linear fittings of their Stern-Volmer (K
SV
) constants and relative fluorescence intensity changes, respectively. Furthermore, the sensor properties of PBI were well investigated by K
SV
constants, pH values, time effects, and time resolved photoluminescence (TRPL) spectra.
KW - Hg mediated Cys sensor
KW - J-Aggregation and deaggregation
KW - Perylene bisimide
KW - Reversible sensor
KW - TRPL spectra
UR - http://www.scopus.com/inward/record.url?scp=84892505435&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2013.12.082
DO - 10.1016/j.snb.2013.12.082
M3 - Article
AN - SCOPUS:84892505435
VL - 194
SP - 229
EP - 237
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -