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1 article(s) from Kar, Debasis

Fluorometric recognition of both dihydrogen phosphate and iodide by a new flexible anthracene linked benzimidazolium-based receptor

Kumaresh Ghosh and
Debasis Kar

Beilstein J. Org. Chem. 2011, 7, 254–264, doi:10.3762/bjoc.7.34

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Graphical Abstract

Figure 1: Synthesized compounds 1 and 2.

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Scheme 1: Synthesis of 1 and 2.

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Figure 2: Energy optimized geometry of 1 with H₂PO₄⁻ (E = 92.14 kcal/mol, a = 2.45 Å, b = 1.94 Å, c = 2.34 Å, ...

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Figure 3: Change in fluorescence emission of 1 (c = 5.78 × 10⁻⁵ M) in the presence of 2 equiv of tetrabutylam...

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Figure 4: Change in emission spectra of 1 (c = 5.78 × 10⁻⁵ M) in presence of increasing amounts of H₂PO₄⁻ in ...

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Figure 5: Suggested modes of binding of the H₂PO₄⁻ ion into the cleft of 1.

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Figure 6: Plot of change in emission of 1 at 420 nm vs the ratio of guest to host concentration in CH₃CN.

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Figure 7: Fluorescence Job plot of 1 with H₂PO₄⁻.

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Figure 8: Change in fluorescence emission of 2 (c = 3.93 × 10⁻⁵ M) in the presence of 1 equiv of tetrabutylam...

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Figure 9: Stern–Volmer plots for 1 (c = 5.78 × 10⁻⁵ M) with H₂PO₄⁻, F⁻, Br⁻ and I⁻ at 420 nm (up to the addit...

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Figure 10: Change in UV–vis spectra of 1 (c = 5.78 × 10⁻⁵ M) in presence of increasing amounts of H₂PO₄⁻ in CH₃...

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Figure 11: Change in fluorescence emission of 1 (c = 5.78 × 10⁻⁵ M) in the presence of 2 equiv of tetrabutylam...

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Figure 12: Stern–Volmer plots for 1 (c = 5.78 × 10⁻⁵ M) with H₂PO₄⁻, F⁻, Br⁻ and I⁻ at 420 nm (up to the addit...

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Figure 13: Fluorescence decays (at λ_max = 420 nm) of receptor 1 upon the addition of H₂PO₄⁻ ion ([H] = 5.78 × ...

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Figure 14: Fluorescence decays (at λ_max = 420 nm) of receptor 1 upon the addition of I⁻ ion ([H] = 5.78 × 10⁻⁵...

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Figure 15: Partial ¹H NMR (300 MHz, CDCl₃ containing 4% CD₃CN) spectra of (a) 1 (c = 1.38 × 10⁻³ M), (b) 1:1 a...

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Published 25 Feb 2011

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