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2 article(s) from Zavalij, Peter Y

Insoluble methylene-bridged glycoluril dimers as sequestrants for dyes

Suvenika Perera,
Peter Y. Zavalij and
Lyle Isaacs

Beilstein J. Org. Chem. 2025, 21, 2302–2314, doi:10.3762/bjoc.21.176

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Figure 1: Chemical structures of selected hosts used as the basis for sequestrants.

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Scheme 1: a) Synthesis of triphenylene-derived aromatic walls W1 and W2, and b) structure of commercially ava...

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Scheme 2: Synthesis of methylene-bridged glycoluril dimers G2W1–G2W4. Conditions: a) TFA: Ac₂O, 95 °C, 3.5 h (...

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Figure 2: Chemical structures of dyes used in this study.

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Figure 3: ¹H NMR spectra recorded (400 MHz, DMSO-d₆, rt) for: a) G2W1, b) G2W2, c) G2W3, d) G2W4.

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Figure 4: Plot of removal efficiency of dyes from water after incubating with equimolar amounts (7.2 μmol) of ...

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Figure 5: Cross-eyed stereoview of: a) one molecule of G2W3 in the crystal, and b) the packing of G2W3 in the...

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Figure 6: Cross-eyed stereoview of: a) a molecule of G2W1 in the crystal, b) the packing of G2W1 along the xz...

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Figure 7: a) Plot of removal efficiency of methylene blue (240 μM, 1 mL) from water after incubating with dif...

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Figure 8: Plot of the removal efficiency versus methylene blue concentration (70, 90, 120, 180, 240, 300, 100...

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Figure 9: a) Plot of removal efficiency of methylene blue (240 μM, 1 mL) from water as a function of time aft...

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Published 29 Oct 2025

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Acyclic cucurbit[n]uril bearing alkyl sulfate ionic groups

Christian Akakpo,
Peter Y. Zavalij and
Lyle Isaacs

Beilstein J. Org. Chem. 2025, 21, 717–726, doi:10.3762/bjoc.21.55

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Figure 1: Chemical structures of CB[n] and selected acyclic CB[n]-type molecular containers M1 and M0.

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Scheme 1: Synthesis of C1. Conditions: a) TFA/Ac₂O, 70 °C, 3.5 h, 71%; b) LiOH, 50 °C, 69%; c) dry pyridine, ...

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Figure 2: a) ¹H NMR spectrum (600, D₂O, rt) and b) ¹³C NMR spectrum recorded (150 MHz, D₂O, rt) for C1.

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Figure 3: Chemical structures of guests used in this study along with the complexation induced changes in che...

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Figure 4: ¹H NMR spectra recorded (400 MHz, D₂O, rt) for: a) Me₆PXDA (0.5 mM), b) a mixture of C1 (0.5 mM) an...

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Figure 5: Cross-eyed stereoview of the C1·Me₆CHDA complex in the crystal. Color code: C, gray; H, white; N, b...

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Figure 6: Cross-eyed stereoview of the crystal packing observed in the molecular cell of C1·Me₆CHDA. H-atoms ...

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Figure 7: a) Representative plot of DP (μcal s⁻¹) versus time from the titration of C1 (0.1 mM) in the ITC ce...

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Published 03 Apr 2025

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