5495 Angew. Chem. Int. Ed. 2006, 45, 5494–5499 2006 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim www. angewandte. org at λex= 400 nm (an isosbestic point in the UV/Vis spectrum) at 258C, we observed that the emission intensity (λem= 465 nm) of CP1 decreased upon increasing the Por-12 concentration (Figure 1b). At [Por-12]= 0.072 mm, the fluorescence intensity of CP1 decreased to 7% of its value in the absence of Por-12. This ...