The highly conjugated DHP-NDI-DHP photochromic dyad 1 was synthesized via a condensation reaction from 1,4,5,8naphthale-nenetetracarboxylic dianhydride 2 (NDA) and DHPamine 3 precursor in DMF (scheme 1) in the closed 1c form which upon purification via column chromatography yielded the pure product as a green solid in 40% yield. The precursor amine 3 was synthesized via a Suzuki coupling of the 4-aminophenyl boronic acid and bromo-DHP 4 in THF/water solvent. The target compound 1c was thoroughly characterized by 1 H, C NMR spectroscopy (for a detailed synthetic procedure please see the supporting information).