Two-stage crystal-to-crystal transformation of 1B (scale bar = 30 μm) upon heating, accompanied by fluorescence color changes from blue (1B) to green (1G) and then to yellow (1Y). White dashed lines ...
A donor-acceptor pyrazinacene derivative with triphenylamine substituents selectively detects naphthalene via π-hole⋅⋅⋅π interactions, inducing a striking, reversible color change from greenish-blue ...
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