Color Responses of a Tripodal Colorimetric Sensor toward Anions

Wei, Lin; He, Yabai; Wu, Jian‐Zhong; Qin, Hongmei; Xu, Kuoxi; Meng, Lingzhi

doi:10.1002/cjoc.200590608

Cited by 9 publications

(1 citation statement)

References 42 publications

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“…Tri(acylhydrazine) amine was used as a B 3 monomer. Both A 2 24 and B 3 29 were synthesized according to previous reports. Dendronized hyperbranched poly(acylhydrazone)s with different branched architecture were prepared by traditional A 2 + B 3 polycondensation of dialdehyde with triacylhydrazine in a solution of pH 4.0.…”

Section: Resultsmentioning

confidence: 99%

Multiple-Responsive Dendronized Hyperbranched Polymers

et al. 2019

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By combining topological structures of hyperbranched polymers with dendronized polymers, a series of hyperbranched poly(acylhydrazone)s pendanted with 3-fold branched dendritic oligoethylene glycol (OEG) units were efficiently prepared through A 2 + B 3 polycondensation. The constituents of these dendritic polymers can be mediated through dynamic covalent acylhydrazones. Owing to the dense OEG pendants, these dendronized hyperbranched polymers are biocompatible and thermoresponsive, and their cloud points ( T cp s) can be modulated by the branched architecture, solution pH, and addition of a third component. Cell viability in the presence of these hyperbranched poly(acylhydrazone)s can be maintained above 80%. Based on the unique dendritic architecture with rich acylhydrazine groups, dynamic hydrogels cross-linked via acylhydrazone linkages with good mechanical property were prepared, which inherit the characteristic thermoresponsive behavior of the polymer precursors and also show remarkable self-healing properties. This novel kind of topological polymers and their corresponding hydrogels with dynamic and multiple smart properties may have promising applications as biomaterials.

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Section: Resultsmentioning

confidence: 99%

Multiple-Responsive Dendronized Hyperbranched Polymers

et al. 2019

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Effect of Hydrogen Binding on Selective Recognition of Halide Anions

Kang

et al. 2016

Chin. J. Chem.

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The interplay of molecular rigidity enforced by interior or exterior hydrogen bonding and affinity for binding halide anions is described to demonstrate the effect of intramolecular hydrogen bonding in anion recognition process. To this end pyridine‐2,6‐dicarboxamides 1 and 2, and aromatic oligoamides 3 and 4 containing intramolecular hydrogen bonds were explored for their ability in associating with tetrabutylammonium halide (Cl−, Br−, and I−). Binding constants in chloroform solution were calculated using nonlinear curve‐fitting method based on 1H NMR titration experiments. The trimeric amide 3, which adopts a crescent conformation as revealed by single‐crystal X‐ray diffraction analysis, strongly binds chloride anion with binding constant as high as 379 L·mol−1. This is more than 6 times greater than the binding constant for the control receptor 2 with a backbone that is only partially rigidified. The comparative data provided supportive information for rationalizing the observed affinity difference in binding halide anions in terms of local preorganization effected by interior or exterior hydrogen bonding.

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