Table 2. Fluorescence Anisotropy Decay Parameters of NADH and NADPH in Aqueous Buffer, across the Tuning Spectrum of the Ti:Sapphire Laser and with Single-Photon Excitation at 360 nm for Comparison.
linear |
circular |
||||
---|---|---|---|---|---|
λ/nm | RL(0) | τLrot/ns | RC(0) | τCrot/ns | |
NADH | 705 | 0.53(±0.07) | 0.277(±0.006) | –0.2(±0.1) | 0.27(±0.01) |
715 | 0.5(±0.1) | 0.279(±0.005) | –0.28(±0.08) | 0.260(±0.007) | |
725 | 0.55(±0.08) | 0.290(±0.004) | –0.25(±0.08) | 0.264(±0.008) | |
735 | 0.5(±0.1) | 0.324(±0.009) | –0.25(±0.08) | 0.244(±0.007) | |
745 | 0.50(±0.03) | 0.346(±0.002) | –0.23(±0.05) | 0.252(±0.004) | |
755 | 0.52(±0.08) | 0.323(±0.005) | –0.24(±0.08) | 0.246(±0.007) | |
765 | 0.5(±0.1) | 0.360(±0.007) | –0.25(±0.08) | 0.249(±0.007) | |
mean | 0.52(±0.02) | 0.323(±0.002) | –0.24(±0.03) | 0.253(±0.002) | |
360 | 0.36(±0.07) | 0.258(±0.006) | – | – | |
NADPH | 705 | 0.5(±0.3) | 0.28(±0.02) | –0.3(±0.1) | 0.32(±0.01) |
715 | 0.5(±0.1) | 0.308(±0.008) | –0.2(±0.1) | 0.28(±0.01) | |
725 | 0.5(±0.1) | 0.364(±0.007) | –0.3(±0.1) | 0.35(±0.02) | |
735 | 0.6(±0.1) | 0.316(±0.008) | –0.3(±0.1) | 0.29(±0.02) | |
745 | 0.6(±0.1) | 0.357(±0.007) | –0.25(±0.08) | 0.35(±0.01) | |
755 | 0.6(±0.1) | 0.338(±0.009) | –0.2(±0.1) | 0.30(±0.02) | |
765 | 0.5(±0.2) | 0.364(±0.01) | –0.2(±0.2) | 0.25(±0.01) | |
mean | 0.55(±0.05) | 0.336(±0.003) | –0.25(±0.04) | 0.304(±0.005) | |
360 | 0.35(±0.05) | 0.42(±0.01) | – | – | |
combined | 2PA | 0.52(±0.02) | – | –0.25(±0.02) | – |
1PA | 0.36(±0.04) | – | – | – |