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Beilstein J. Org. Chem. 2010, 6, No. 12, doi:10.3762/bjoc.6.12
Graphical Abstract
Figure 1: The structure of the indolocarbazole-based chemosensor 1.
Scheme 1: Synthesis of receptor 1.
Figure 2: The AM1 optimized structure of receptor 1 (heat of formation = −8.29 kcal/mol).
Figure 3: Color changes of receptor 1 (A) (c = 1.1 × 10−4 M) in CH3CN/H2O (4:1 v/v) on addition of tetrabutyl...
Figure 4: UV spectral change of receptor 1 (c = 1.1 × 10−4 M) upon gradual addition of [Bu4N]+F− (left side) ...
Scheme 2: Schematic representation (the circles represent the indolocarbazole moiety) of the two-step process...
Figure 5: The Job plot of 1 with fluoride ion from UV method in CH3CN/H2O (4:1 v/v).
Figure 6: Fluorescence change of receptor 1 (c = 4.475 × 10−5 M) upon gradual addition of [Bu4N]+F− (left sid...
Figure 7: Binding constant calculation curves for receptor 1 vs F−, Cl−, Br−, I−, AcO−, HSO4−, and H2PO4− (le...
Figure 8: 1H NMR spectra of receptor 1 (bottom), 1 with [Bu4N]+F− 1:2 [receptor 1:(Bu4N)+F−] (middle) and exc...