Hydroxycoumarin encapsulated sulfonatothiacalix[4]arene: 1H NMR, steady state fluorescence and theory

Patil, Sanhita; Gejji, Shridhar P.; Kalyani, Vrashali S.; Malkhede, Dipalee D.

doi:10.1016/j.molliq.2021.116760

Cited by 5 publications

(3 citation statements)

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“…As a result, some Nap proton signals may be obscured by the TCAS signal. Due to the π-π interaction between the aromatic wall of TCAS and Nap, the Nap protons likely experience a shield effect after complexation, and their chemical shift values will be placed in the upfield region [ [49] , [50] , [51] ]. Although a sizeable upfield shift was found in the Nap protons, the formation of a new peak was highly unexpected because such a phenomenon has rarely been reported in prior research [ [52] , [53] , [54] , [55] ].…”

Section: Resultsmentioning

confidence: 99%

PAHs removal by soil washing with thiacalix[4]arene tetrasulfonate

Xing,

Meng,

Yang

et al. 2024

Environmental Science and Ecotechnology

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Section: Resultsmentioning

confidence: 99%

PAHs removal by soil washing with thiacalix[4]arene tetrasulfonate

Xing,

Meng,

Yang

et al. 2024

Environmental Science and Ecotechnology

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“…On the other hand, 1 H-NMR spectra of pure TSC4X revealed that it has two peaks in 1 H-NMR spectra for Ar–H and Ar–OH protons and the corresponding chemical shift values are 7.95 ppm and 3.44–3.42 ppm, respectively. 53 However, after complexation, the Ar–H proton undergoes an upfield change in the chemical shift value with Δδ = −0.04 ppm, whereas the Ar–OH proton undergoes slightly downfield chemical shift change having Δδ = 0.02 ppm.…”

Section: Resultsmentioning

confidence: 99%

Host–Guest Encapsulation of RIBO with TSC4X: Synthesis, Characterization, and Its Application by Physicochemical and Computational Investigations

et al. 2023

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In our present work, we synthesized a new encapsulated complex denoted as RIBO-TSC4X, which was derived from an important vitamin riboflavin (RIBO) and psulfonatothiacalix[4]arene(TSC4X). The synthesized complex RIBO-TSC4X was then characterized by utilizing several spectroscopic techniques such as 1 H-NMR, FT-IR, PXRD, SEM, and TGA. Job's plot has been employed to show the encapsulation of RIBO (guest) with TSC4X (host) having a 1:1 molar ratio. The molecular association constant of the complex entity (RIBO-TSC4X) was found to be 3116.29 ± 0.17 M −1 , suggesting the formation of a stable complex. The augment in aqueous solubility of the RIBO-TSC4X complex compared to pure RIBO was investigated by UV−vis spectroscopy, and it was viewed that the newly synthesized complex has almost 30 times enhanced solubility over pure RIBO. The enhancement of thermal stability upto 440 °C for the RIBO-TSC4X complex was examined by TG analysis. This research also forecasts RIBO's release behavior in the presence of CT-DNA, and at the same time, BSA binding study was also carried out. The synthesized RIBO-TSC4X complex exhibited comparatively better free radical scavenging activity, thereby minimizing oxidative injury of the cell as evident from a series of antioxidant and anti-lipid peroxidation assay. Furthermore, the RIBO-TSC4X complex showed peroxidase-like biomimetic activity, which is very useful for several enzyme catalyst reactions.

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“…1 H NMR spectroscopy is a useful technique that can be utilized to explore the possible binding mode of a guest molecule with TSC4X by analyzing the changes in chemical shift values (Dd) of guest protons. 36,37 In the present work, the inclusion of SBZ into the cavity of TSC4X has been studied using 1 H-NMR spectroscopy. The 1 H NMR spectra of pure SBZ, TSC4X and SBZ-TSC4X inclusion complex are shown in Fig.…”

Section: H Nmr Spectral Analysismentioning

confidence: 99%