A novel L-tryptophan (L-Trp) fluorescent sensor (BTAP5) based on a functionalized pillar[5]arene has been developed. The sensor BTAP5 exhibits high selectivity and sensitivity (2.83 × 10−7 M) towards L-Trp in H2O/DMSO (7 : 3, v/v) solution. The recognition mechanism was studied by 1H NMR, electrospray ionization mass spectrometry and 2D NOESY.
![Graphical abstract: A novel functionalized pillar[5]arene-based selective amino acid sensor for l-tryptophan](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C6QO00569A&imageInfo.ImageIdentifier.Year=2017)
T. Wei, J. Chen, X. Cheng, H. Li, B. Han, Y. Zhang, H. Yao and Q. Lin, Org. Chem. Front., 2017, 4, 210 DOI: 10.1039/C6QO00569A
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