Recognition of naphthoflavones by calix[4]pyrrole[2]phenanthrene?
New Journal of Chemistry Pub Date: 2023-07-07 DOI: 10.1039/D3NJ02483K
Abstract
Here we report the synthesis of a new kind of expanded calix[4]pyrrole named calix[4]pyrrole[2]phenanthrene 1, containing two phenanthrene subunits in lieu of two of the four acetone bridging elements. This macrocycle exists in a planar structure and four pyrrole units adopt the 1,3-alternate conformation in the solid state. Moreover, host 1 exhibits selective recognition against naphthoflavone as confirmed by 1H NMR, ESI-MS and X-ray analysis experiments. Interestingly, the conformation of 1 changed from a planar to a wing-like conformation after complexation with β-naphthoflavone, and noncovalent interactions played an important role in the formation of the complex.
![Graphical abstract: Recognition of naphthoflavones by calix[4]pyrrole[2]phenanthrene](http://scimg.chem960.com/usr/1/D3NJ02483K.jpg)
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Journal Name：New Journal of Chemistry
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CAS no.: 89640-58-4
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