Effects of molecular structure on the grafting of diaminobenzene sulfonic acid onto graphene oxide

One-Pot Synthesis of Functionalised rGO/AgNPs Hybrids as Pigments for Highly Conductive Printing Inks

“…With the addition of 2,5-DBSA and heating under reflux, the two precursors (GO and Ag ions) were successfully reduced [47] and according to our previous results [6,30], rGO was functionalized by arylsulfonic groups and obtained a characteristic hydrophilic character. Similarly, Fukaya et al [7] reported that the distance of the amino-and sulfo-groups in 2,5-DBSA (para-positions) is a determining factor for the strength of the electronic interaction between them and thus allows the significant reduction of GO by DBSA. Furthermore, the density functional theory calculations that the same authors performed indicated that 2,5-DBSA can have a stronger reduction effect than 2,4-DBSA (meta-positions).…”

“…Also, Fukaya et.al. [7] studied the adsorption and reduction reactions between GO and 2,4-DBSA, and 2,5-DBSA through experimental and numerical analyses and showed that 2,5-DBSA possesses a stronger reducing ability towards GO than 2,4-DBSA. The as produced functionalized rGO (f -rGO) is highly reduced and simultaneously hydrophilic and is, therefore, considered ideal for use as a conductive functional pigment for the development of water-based conductive inks for gravure [6], flexo [8] and ink-jet printing [9][10][11][12], paving the way for its utilization in many application areas.…”