Reactivity of N-substituted azaaromatics

Śliwa, Wanda

doi:10.1007/bf01165002

Cited by 2 publications

(2 citation statements)

References 162 publications

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“…Therefore, the resorcinarenes and their derivatives can also be considered cavitands-like cyclodextrins and calixarenes, because of their cavity-shaped structure. It is an interesting coincidence that alkylene-bridged resorcinarenes are also referred to as cavitands [8]. The resorcinarenes and cavitands are relatively easy to synthesize in a wide range of size and with different functional groups [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Retention behavior of resorcinarene‐based cavitands on C₈ and C₁₈ stationary phases

Bartó

Prauda

Kilár

et al. 2015

J of Separation Science

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The understanding of the retention behavior of large molecules is an area of interest in liquid chromatography. Resorcinarene-based cavitands are cavity-shaped cyclic oligomers that can create host-guest interactions. We have investigated the chromatographic behavior of two types of cyclic tetramers as analytes in high-performance liquid chromatography. The experiments were performed at four different temperatures (15, 25, 35, 45°C) on two types of reversed stationary phases (C8 and C18 ) from two different manufacturers. We have found a huge difference between the retention of resorcinarenes and cavitands. In some cases, the retention factor of cavitands was even a hundred times larger than the retention factor of resorcinarenes. The retention of methylated derivates was two to four times larger compared to that of demethylated compounds on every column. The opposite retention behavior of the resorcinarenes and cavitands on the two types of stationary phases showed well the difference of the selectivity of the XTerra and BDS Hypersil columns. The retention mechanism was studied by the thermodynamic parameters calculated from the van't Hoff equation.

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Section: Introductionmentioning

confidence: 99%

Retention behavior of resorcinarene‐based cavitands on C₈ and C₁₈ stationary phases

Bartó

Prauda

Kilár

et al. 2015

J of Separation Science

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“…Due to the distinct three-dimensional shapes, calixarenes have received considerable attention in various fields, especially in molecular recognition . Recently, increasing attention has also been focused on the heterocalixarenes in which phenol units of calixarene are replaced by aromatic heterocycles . In this regard, we have recently reported the design and synthesis of calix[2]triazole[2]arene ( 1 , Scheme ) as a new class of hybrid heterocalixarene .…”

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Bimodal Calix[2]triazole[2]arene Fluorescent Ionophore

et al. 2013

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Pyrene-appended calix[2]triazole[2]arene capable of bimodal sensing has been synthesized. Upon addition of Zn(2+) (or Cd(2+)), it selectively exhibits an enhanced monomeric emission (~13-20-fold) over other metal ions. On the other hand, it displays excellent selectivity for Fe(2+) over other metal ions (even over Fe(3+)) from the angle of excimeric emissions (10-fold enhancement). Density Functional Theory (DFT) based theoretical calculations distinguished the bimodal activity of the probe and supported the experimental observations.

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Reactivity of N-substituted azaaromatics

Cited by 2 publications

References 162 publications

Retention behavior of resorcinarene‐based cavitands on C₈ and C₁₈ stationary phases

Retention behavior of resorcinarene‐based cavitands on C₈ and C₁₈ stationary phases

Bimodal Calix[2]triazole[2]arene Fluorescent Ionophore

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Reactivity of N-substituted azaaromatics

Cited by 2 publications

References 162 publications

Retention behavior of resorcinarene‐based cavitands on C8 and C18 stationary phases

Retention behavior of resorcinarene‐based cavitands on C8 and C18 stationary phases

Bimodal Calix[2]triazole[2]arene Fluorescent Ionophore

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Retention behavior of resorcinarene‐based cavitands on C₈ and C₁₈ stationary phases

Retention behavior of resorcinarene‐based cavitands on C₈ and C₁₈ stationary phases