Congratulation Dr. Sankarasekaran Shanmugaraju (Raju) on a hat-trick of publication recently out in Organic & Biomolecular Chemistry, Chem. Commun and Journal of Material Chemistry A.
In Organic & Biomolecular Chemistry, working with Chris and Sachi as well as group alumni Jon Kitchen and Salvador Blasco, he reported a novel one-pot synthetic strategy for the synthesis of a family of N-alkyl-1,8-naphthalimide based Tröger’s bases via a nucleophilic substitution reaction of a common ‘precursor’ N-aryl-1,8-naphthalimide Tröger’s base and aliphatic primary amine, neat at 80 °C.
In Chem. Commun the synthesis and structural characterization of two novel supramolecular coordination polymers TB-Co-CP and TB-Cd-CP was described, containing Tröger’s base structural motifs, from a novel V-shaped 4-amino-1,8-naphthalimide derived Tröger’s base luminescent scaffold. These are the second examples of such systems, and the first to be structurally characterised through X-ray diffraction analysis, which demonstrated that, in each case, substantial face-to-face π-π interactions prevail the extended structures, leading to 1D-supramolecular polymeric networks. These results are of major importance in demonstrating the application of NapTB in coordination and inorganic supramolecular chemistry. This communication was published in a special issue on “chemosensor and molecular logic”. Also, the work was featured as an inside front cover!
The very recent article published in Journal of Material Chemistry A, Raju reported a Tröger’s base-functionalised covalent organic polymer (TB-COP) which was used as an adsorbent/molecular filter for the efficient removal of secondary chemical explosives picric acid (PA) from water. The extraction of PA was also clearly visible to the naked eye, where the yellow colored PA solution became transparent upon addition of TB-COP. Importantly, TB-COP could be used to store PA over a long period of time in a safe manner, without any leakage or any significant loss in extraction efficiency. Moreover, the polymer could be reused for several adsorption cycles, as PA could be released back into solution by simply changing the pH of the aqueous media. This makes TB-COP an extremely promising material for the selective and efficient removal of picric acid from water, as well as TB-COP can be considered as being a ‘fast’ and naked eye colorimetric indicator for such analytes.
Congrats to Raju and collaborators for these excellent articles!