Syntheses and characterizations of two-dimensional lanthanide coordination polymers based on anthraquinone-1,4,5,8-tetracarboxylic acid

Synthesis of a Novel Cysteine-Incorporated Anthraquinone Derivative and Its Structural Properties

“…Although a broadened peak was observed around 400–500 nm, there was no shift in the absorbance peak, thus each amide group is oriented in a perpendicular manner. The fluorescence excited at 350 nm appeared at 400–600 nm in Supplementary Materials (Fluorescence spectra of 7 ), which corresponds to the anthraquinone moiety as reported [23,24,25,26].…”

“…The two cysteine chains of 7 were oriented in a similar manner, and the two carbonyl groups at the 1,8-positions were incorporated perpendicularly to the anthraquinone rings with torsion angles of 61.09° and 83.04°, respectively [23,24,25,26,27,28,29]. About the anthraquinone moiety, in contrast to the reported structure, both benzene rings were twisted with a torsion angle of 8.25°.…”