Fig. 4: Multi-internal reflection IR spectra.
From: Porphene and porphite as porphyrin analogs of graphene and graphite
a LB layer of Zn-2 after 3 h of oxidation to 1 with an aqueous subphase containing approx. (A) 0, (B) 0.5, (C) 3.5, (D) 5.3, (E) 7.0, (F) 17.5, and (G) 35.0 μM K2IrCl6, followed by charge quenching with excess NaI and transfer to Ge. Unlabeled orange curve: contribution of 1 to spectrum (F). The sequence (A)–(F) shows the gradual conversion of Zn-2 to 1. Spectrum (G) was taken 24 h after adjusting the subphase to ~0.1 M ZnCl2 and pH = 6 and is a spectrum of Zn-1. Intensity above 1630 cm-1 reflects variable film water content. b IR spectrum of a transferred layer: (A) 2, (B) 1, (C) Zn-1, (D) Zn-2.
