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a) VT UV/Vis spectra of C1 (MCH, 2×10−5 m, 363 K–273 K; 1 K min−1). Inset: plot of absorbance versus T extracted from VT UV/Vis (λ=450 nm). b, c) AFM height images recorded upon spin‐coating a 5×10−5 m solution of C1 in MCH on HOPG at 293 K (b) and 273 K (c). d) Packing of C2, derived from X‐ray crystal analysis.
