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(a) SERS spectra of DAS ⊂ CB[8]:AuNP nanocluster solution before (tirr = 0 s) and after (tirr = 60 s) UV irradiation (λ = 355 nm). Highlighted modes (blue, tirr = 60 s) indicate newly emergent modes following photocyclisation. Spectra offset and background subtracted for clarity. (b) Time-resolved normalized SERS intensity of the 1630 cm–1 alkene mode of the DAS “reactant” (○) and of the 667 cm–1 cyclic mode of the syn-TCB photocycle product (●). Solid and dashed lines guide the eye.
