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1 article(s) from Hazra, Giridhari

Synthesis of indolo[3,2-b]carbazole-based new colorimetric receptor for anions: A unique color change for fluoride ions

Ajit Kumar Mahapatra,
Giridhari Hazra and
Prithidipa Sahoo

Beilstein J. Org. Chem. 2010, 6, No. 12, doi:10.3762/bjoc.6.12

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Graphical Abstract

Figure 1: The structure of the indolocarbazole-based chemosensor 1.

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Scheme 1: Synthesis of receptor 1.

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Figure 2: The AM1 optimized structure of receptor 1 (heat of formation = −8.29 kcal/mol).

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Figure 3: Color changes of receptor 1 (A) (c = 1.1 × 10⁻⁴ M) in CH₃CN/H₂O (4:1 v/v) on addition of tetrabutyl...

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Figure 4: UV spectral change of receptor 1 (c = 1.1 × 10⁻⁴ M) upon gradual addition of [Bu₄N]⁺F⁻ (left side) ...

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Scheme 2: Schematic representation (the circles represent the indolocarbazole moiety) of the two-step process...

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Figure 5: The Job plot of 1 with fluoride ion from UV method in CH₃CN/H₂O (4:1 v/v).

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Figure 6: Fluorescence change of receptor 1 (c = 4.475 × 10⁻⁵ M) upon gradual addition of [Bu₄N]⁺F⁻ (left sid...

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Figure 7: Binding constant calculation curves for receptor 1 vs F⁻, Cl⁻, Br⁻, I⁻, AcO⁻, HSO₄⁻, and H₂PO₄⁻ (le...

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Figure 8: ¹H NMR spectra of receptor 1 (bottom), 1 with [Bu₄N]⁺F⁻ 1:2 [receptor 1:(Bu₄N)⁺F⁻] (middle) and exc...

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Preliminary Communication

Published 08 Feb 2010

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