NDLI: Bay Functionalized Perylenediimide with Pyridine Positional Isomers: NIR Absorption and Selective Colorimetric/Fluorescent Sensing of Fe$^{3+}$ and Al$^{3+}$ Ions

Content Provider	Springer Nature Link
Author	Kundu, Anu Pitchaimani, Jayaraman Madhu, Vedichi Sakthivel, Pachagounder Ganesamoorthy, Ramasamy Anthony, Savarimuthu Philip
Copyright Year	2016
Abstract	Bay functionalized perylene diimide substituted with pyridine isomers, (2-pyridine (2HMP-PDI), 3-pyridine (3-HMP-PDI) and 4-pyridine (4-HMP-PDI)) have been synthesized and explored for selective coloro/fluorimetric sensing of heavy transition metal ions. HMP-PDIs showed strong NIR absorption (760–765 nm) in DMF. The absorption and fluorescence of HMP-PDIs have been tuned by make use of pyridine isomers. Reddish-orange color was observed for 2-HMP-PDI (λ$_{max}$ = 437, 551, 765 nm) whereas 4-HMP-PDI exhibited light green (λ$_{max}$ = 432, 522, 765 nm). 3-HMP-PDI showed orange-yellow (λ$_{max}$ = 431, 524, 762 nm). The fluorescence spectra of 2-, 3- and 4-HMP-PDI showed λ$_{max}$ at 585, 538, 546 nm, respectively. Interestingly, HMP-PDI dyes showed selective color change (intense pink color) and fluorescence quenching for Fe$^{3+}$ and Al$^{3+}$ metal ions in DMF. Absorbance spectra revealed complete disappearance of NIR absorption and intensification/appearance of new peak at lower wavelength. The concentration dependent studies suggest that 4-HMP-PDI can detect up to 36.52 ppb of Fe$^{3+}$ and 43.12 ppb of Al$^{3+}$ colorimetrically. The interference studies in presence of other metal ions confirmed the good selectivity for Fe$^{3+}$ and Al$^{3+}$. The mechanistic studies indicate that Lewis acidic character of Fe$^{3+}$ and Al$^{3+}$ ions were responsible for selective color change and fluorescence quenching.
Starting Page	491
Ending Page	500
Page Count	10
File Format	PDF
ISSN	10530509
Journal	Journal of Fluorescence
Volume Number	27
Issue Number	2
e-ISSN	15734994
Language	English
Publisher	Springer US
Publisher Date	2016-11-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bay functionalized perylenediimide Pyridine positional isomers NIR absorption Selective colorimetric/fluorescent sensing of Fe$^{3+}$ and Al$^{3+}$ ions Biomedicine Biological and Medical Physics, Biophysics Biotechnology Biochemistry Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Sociology and Political Science Spectroscopy Law Biochemistry Clinical Biochemistry Clinical Psychology

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