Fig. 6.

Application of the cyclo-WW + Zn(II) QC self-assemblies. a Schematic presentation of the LED setup using dried cyclo-WW + Zn(II) assembled in MeOH as phosphors. The upper inset shows the working depiction of a prototype, emitting bright green light (ex: 450 nm). b Spectroscopic characterization of the LED photoluminescence using three excitation wavelengths, as indicated, showing the same emission at 550 nm. c Cytotoxicity test of the cyclo-WW + Zn(II) nanospheres in DMSO (62.5 nM and 125 nM) towards B16-BL6, HaCaT, and MCF7 cells. Viability relative to untreated controls ± sd, designated as error bars, is shown based on three repeats and averaged. d In vivo whole body NIR fluorescent imaging following subcutaneous injection of the nanospheres (50 μL, 2.7 mM) into nude mice, showing notable emissions under various excitations. The dotted circle indicates the location of injection