Formation of fluorescent one-dimensional structures from trigonal molecules
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Light-responsive fluorescent compounds are imperative in applications such as optical information storage and fluorescence sensing in contactless function. Herein, we synthesized a trigonal azobenzene framework connected with three methoxy group at the meta position. Photoisomerization process of the trigonal compound was affirmed by NMR spectroscopic measurements. Upon irradiation with UV light, the proton signals related to the aromatic rings were shifted to upfield because of its molecular structure change. Reversely, thermal recovery to the original state was completed in three days in the dark. Optical microscopy (OM), Scanning electron microscopy (SEM) and fluorescence optical microscopy (FOM) observations showed fibrous structures formed from the mixture of chloroform and methanol. The introduction of green light to the self-assembled structures exhibited red fluorescent emission.