Interaction Scheme

Molecule

Ca2
Ca2+

c = 0.0 — 25000.0 µM

Host

Cx4
Cx4

c = 1600.0 µM

Indicator

Untitled
2,3-Diazabicyclo(2.2.2)oct-2-ene

c = 1000.0 µM

Binding Properties

𝜈 Molecule 1 : 1 Host
Ka = 3820.0 ± 382.0 M-1
Kd =
logKa = 3.58 ± 0.04
T 25.0 °C 298 K
Energy kJ mol-1 kcal mol-1
ΔG = -20.45 ± 0.25 -4.89 ± 0.06
ΔH = 4.0 0.96
-TΔS = -23.0 -5.5
J mol-1 K-1 cal mol-1 K-1
ΔS = 77.1 18.4
These are the specifications of the determination of the experimental results.
Detection Method: Competitive
Assay Type: Competitive Binding Assay
Technique: Fluorescence
𝛌ex = 365.0 nm
Detailed information about the solvation.
Solvent System Complex Mixture
Solvents Deuterium Oxide
Additives sodium deuteroxide
pH 7.4
Please find here information about the dataset this interaction is part of.
Citation:

W. M. Nau, H. Bakirci, A. L. Koner, SupraBank 2024, Binding of inorganic cations by p-sulfonatocalix[4]arene monitored through competitive fluorophore displacement in aqueous solution (dataset). https://doi.org/10.34804/supra.20210928275

Link: https://doi.org/10.34804/supra.20210928275
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Please find here information about the scholarly article describing the results derived from that data.
Citation:

H. Bakirci, A. L. Koner, W. M. Nau, Chem. Commun. 2005, 5411.

Link: https://doi.org/10.1039/B510319C
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Binding Isotherm Simulations


The plot depicts the binding isotherm simulation of a 1:1 interaction of Ca2+ (0.005235602094240838 M) and Cx4 (0 — 0.010471204188481676 M).