Fig. 3: Fine-tuning the degree of chiral asymmetry of PDA with sequential UV irradiation at 313 nm and 254 nm. | Nature Communications

Fig. 3: Fine-tuning the degree of chiral asymmetry of PDA with sequential UV irradiation at 313 nm and 254 nm.

From: Highly enantioselective photo-polymerization enhanced by chiral nanoparticles and in situ photopatterning of chirality

Fig. 3

a A mixture of left-handed and right-handed PDA obtained with sequential exposure of UV at two wavelengths. b CD spectra and c corresponding CD intensities at 685 nm of PDA obtained with different irradiation conditions: (i) 360 s at 313 nm, (ii) 340 s at 313 nm and 10 s at 254 nm, (iii) 320 s at 313 nm and 15 s at 254 nm, (iv) 300 s at 313 nm and 20 s at 254 nm, (v) 280 s at 313 nm and 25 s at 254 nm, (vi) 260 s at 313 nm and 35 s at 254 nm, (vii) 200 s at 313 nm and 40 s at 254 nm, (viii) 140 s at 313 nm and 45 s at 254 nm, (ix) 80 s at 313 nm and 50 s at 254 nm, (x) 20 s at 313 nm and 55 s at 254 nm, (xi) 60 s at 254 nm, respectively. At least four irradiation experiments were performed to obtain the average CD signals, and error bars represented standard deviations of measured CD signals.

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