トリプトファンとβ-シクロデキストリン修飾ZnS量子ドットの分子間相互作用の分光分析による探求
Ritu K Shah1, Sahaj A Gandhi1, Pinkesh G Sutariya2
1Department of Physics, Bhartiya Vidya Bhavan's Shri Ishvarbhai L.P. Arts-Science & J. Shah Commerce College, Dakor 388225, Gujarat, India.
Abstract:
The luminescent properties of water-soluble β-cyclodextrin surface-modified capped ZnS QDs (β-CD/ZnS QDs) were investigated for host-guest interactions. The optical properties of the β-CD/ZnS QDs complex revealed selectivity for L-tryptophan (L-Trp) through aggregation-induced emission. Fluorescence titration and Dynamic Light Scattering analysis revealed the fluorescence enhancement effect and aggregation state of β-CD/ZnS QDs in the presence of L-Trp, respectively. The apparent binding constant was determined 1.75x10-8M-1 determine, along an LOD of 420 nM for L-Trp. UV-Visible, Raman, Fourier transform infrared, and Matrix-Assisted Laser Desorption/Ionization (MALDI) - mass spectrometry were used to investigate the interaction of β-CD/ZnS QDs with L-Trp. Moreover, the β-CD/ZnS QDs probe was used for L-Trp detection in soybeans, yielding 91-97% recovery using fluorescence titration.
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