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Fig. 3 | Journal of Nanobiotechnology

Fig. 3

From: One-photon red light-triggered disassembly of small-molecule nanoparticles for drug delivery

Fig. 3

Photophysical characterization of PtTPBP, BTAEA and nanoparticles. Optimized excited state geometries and energy levels of BTAEA (a) and PtTPBP (b) determined at the B3LYP/6-31G(d) (LANL2DZ on I) level with Gaussian 16 software. c Normalized UV–vis absorption spectra of BTAEA, PtTPBP and PTX/Pt/BTNPs. d Phosphorescence intensity quenching of PtTPBP (10 μM) by BTAEA at different concentrations (0–10 μM) in N2-saturated methanol solution containing 10% toluene. e Stern−Volmer plot from phosphorescence quenching test and their linear fitness. (I0: phosphorescence intensity of PtTPBP in solution; It: phosphorescence intensity of PtTPBP in the presence of BTAEA; kq: bimolecular quenching constant; kTTET: TTET rate constant)

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