Table 4.
Physico-chemical and photophysical characteristics of fresh solutions of polymer-cluster constructs in PBS and their stability after 5 days.
| Polymer-Cluster Constructs |
DH (nm) a |
ZP (mV) a |
λL (nm) b |
ΦL(Ar) | ΦL(air) | FT(air) |
|---|---|---|---|---|---|---|
| POL5, fresh | 7.3 ± 1.1 | −17 | 688 | 0.27 | 0.06 | 0.78 |
| POL5, 5 days old | 7.9 ± 1.4 | −15 | 690 | 0.25 | 0.06 | 0.76 |
| POL6, fresh | 11.0 ± 0.9 | −7 | 689 | 0.27 | 0.06 | 0.78 |
| POL6, 5 days old | 14.2 ± 0.1 | −1 | 690 | 0.27 | 0.06 | 0.78 |
a The mean hydrodynamic diameter (DH) and zeta potential (ZP) were obtained by DLS with intensity of scattered light detected at angle θ = 173° in PBS. b λL is the maximum of luminescence emission bands; ΦL(Ar) and ΦL(air) are the luminescence quantum yields in argon- and air-saturated dispersions, respectively (excitation wavelength was 400 nm); FT(air) is the fraction of the triplet states quenched by oxygen in air saturated solutions: FT(air) =1 − ΦL(air)/ΦL(Ar).