Fig. 2
From: Alkylation of Spiropyran Moiety Provides Reversible Photo-Control over Nanostructured Soft Materials
a UV–visible spectra of SPL in methanol (1.87 × 10−3 M, 298 K) with curves corresponding to equilibrium condition without light (continuous line), after 10 min UV light exposure (dashed line) and after 10 min white light exposure (dotted lines). b UV–visible spectra of phytantriol cubic phase in excess water without photochromic (continuous line) and SPL in phytantriol cubic phase (2.55 × 10−4 M, 298 K) with curves corresponding to 10 min UV light exposure (dashed line) and after 10 min white light exposure (dotted lines). The peaks at 300–350 nm are assigned to the closed spiro form of the SPL and the peak at 540 nm assigned to the open merocyanine form of the SPL