Fig. 1: Crystal structure of the synthesized compounds.

a A perspective view of the compound 1. b Partially dimerized compound i201. c In-situ bent compound 1b. d PXRD patterns of simulated (black) and as-synthesized before UV (red) and after UV irradiation (blue) of compound 1. e Optical microscopic image of needle crystal 1 before irradiation. f Bending crystal of 1 upon UV irradiation. g In-situ obtained bent crystal 1b.