Fig. 1. TCEP-induced release of CPT and NAP from 1. (a) UV-vis spectra (c = 25 μM) of NAP, CPT, 1, and 1 treated with 20 eq. TCEP at 37 °C for 48 h. (b) Fluorescence spectra (c = 5 μM, λexc = 450 nm, spectral bandwidths 3 nm) of NAP, 1, and 1 treated with 20 eq. TCEP at 37 °C for 48 h. Inset: photograph of the solutions under UV-light (λexc = 455 nm). (c) Released amount of NAP and CPT over reaction time calculated from normalized integrated areas of the PDA detector signals of UPLC elugrams (Fig. S32a†). All spectra were recorded in MeCN : H2O = 2 : 3 (v/v) at room temperature.
