A novel 2D coordination polymer based on a copper(II) tetramer with p -sulfonated thiacalix[4]arene

Guo, Qian; Wenxiang, Zhu; Gao, Song; Ma, Shulan; Dong, Shujing; Xu, Miao-Qiong

doi:10.1016/j.inoche.2004.01.011

Cited by 27 publications

(13 citation statements)

References 12 publications

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“…By comparison of the molecular structure of TCAS and CAS, possible mechanism of distinctive chromogenic recoginition of TCAS towards copper(II) ion can be inferred as the complexation between TCAS and copper(II) ion via the bridge sulfur atom site. This complexation structure between TCAS and copper(II) ion had been reported in previous experimental work [25,26].…”

Section: The Mechanism Of Selective Chromogenic Response Of Tcas To Csupporting

confidence: 86%

“…Thiacalix [4]arene tetrasulfonate (TCAS, Figure 1), a water-soluble derivative of calix [4]arene with a heteratom bridge atom between its phenol units, has been studied in some previous works [23,24]. The crystal structures of a few copper complexes of TCAS have been investigated to clarify the coordination site between TCAS and copper [25,26]. In this work, we firstly reported the highly selective chromogenic recognition behavior of TCAS towards copper(II) ion over other first row transition metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Selective Chromogenic Recognition of Copper(II) Ion by Thiacalix[4]arene Tetrasulfonate and Mechanism

Zhu

2020

Molecules

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Detection of biologically important transition metal ions such as copper by using a simple method is desirable and of great importance. In this work, we firstly reported that water-soluble thiacalix[4]arene tetrasulfonate (TCAS) exhibited selective chromogenic recognition towards copper(II) ion over other transition metal ions. Color change from colorless to salmon pink was observed in TCAS solution, weak bathochromic shift was induced in UV absorption spectrum of TCAS upon addition of copper(II) ion, and the absorbance of characteristic absorption band at 312 nm increased linearly with copper(II) ion concentration. The recognition mechanism of TCAS to copper(II) ion was investigated by a comparative study with calix[4]arene tetrasulfonate (CAS) and time-dependent density functional theory(TD-DFT) study, and the absorption bands were assigned based on transition orbital analysis.

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Section: The Mechanism Of Selective Chromogenic Response Of Tcas To Csupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Selective Chromogenic Recognition of Copper(II) Ion by Thiacalix[4]arene Tetrasulfonate and Mechanism

Zhu

2020

Molecules

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“…It is well-known that calixarenes can form stoichiometric 1:1 complexes with model substrates. − Herein, the Corey-Pauling-Koltun (CPK) molecular model studies also demonstrate that C4AS, TC4AS, or C5AS can only accommodate one pyridine guest in its hydrophobic cavity. Simultaneously, the 1:1 binding modes for the inclusion complexes of C4AS or TC4AS with pyridine have been also validated by their crystal structures. Therefore, a fixed 1:1 binding stoichiometry is used in the curve-fitting analysis of calorimetric titration.…”

Section: Resultsmentioning

confidence: 91%

Molecular Recognition Thermodynamics of Pyridine Derivatives by Sulfonatocalixarenes at Different pH Values

Liu

Chen

et al. 2006

J. Org. Chem.

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The complex stability constants (Ka) and thermodynamic parameters (DeltaG degrees, DeltaH degrees, and TDeltaS degrees) for 1:1 complexation of water-soluble calix[4]arene, thiacalix[4]arene, and calix[5]arene sulfonates with pyridine and their methylated derivatives have been determined by means of isothermal titration calorimetry at pH 2.0 and 7.2 at 298.15 K, and their binding modes have been investigated by NMR spectroscopy. The results obtained show that sulfonatocalixarenes afford stronger binding ability toward pyridine guests at pH 2.0, attributable to the positive electrostatic interactions and the more extensive desolvation effects, but present higher molecular selectivity at pH 7.2 owing to the strengthened C-H...pi interactions. The pH-responsible binding ability and molecular selectivity are discussed from the viewpoint of electrostatic, pi-stacking, van der Waals interactions and size-fit relationship between host and guest. A close comparison further demonstrates that the C-H...pi interactions and van der Waals interactions play a more important role than pi...pi interactions in the present inclusion complexation.

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“…As mentioned above, thiacalix[ n ]arenes and their derivatives have high affinity to various metal ions by virtue of the coordination of the bridging groups. Actually, a variety of metal complexes have already been prepared, many of their structures being elucidated by X-ray crystal analysis. − It has been revealed that they frequently assemble to form multinuclear complexes using many ligating sites. The ratio of thiacalix[ n ]arenes (ligand) and metal ions of the reported metal complexes is summarized in Table 10.…”

Section: 26 Preparation Of Metal Complexes Using Thiacalixarenes As L...mentioning

confidence: 99%

Thiacalixarenes

et al. 2006

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A novel 2D coordination polymer based on a copper(II) tetramer with p -sulfonated thiacalix[4]arene

Cited by 27 publications

References 12 publications

Selective Chromogenic Recognition of Copper(II) Ion by Thiacalix[4]arene Tetrasulfonate and Mechanism

Selective Chromogenic Recognition of Copper(II) Ion by Thiacalix[4]arene Tetrasulfonate and Mechanism

Molecular Recognition Thermodynamics of Pyridine Derivatives by Sulfonatocalixarenes at Different pH Values

Thiacalixarenes

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