Organic charge-transfer complexes for the selective accommodation of aromatic isomers using anthracene derivatives and TCNQ. (21st April 2016) - Khan, Arshad
Abstract : Four organic-charge transfer (CT) complexes (Ct1–Ct4 ) have been reported.Ct1 discerns p -xylene in the presence of a xylene mixture. Abstract : Four new organic charge-transfer complexes (Ct1, Ct2, Ct3 andCt4 ) were engineered via anthracene derivatives, namely, acetyl-3-phenyl-5-(9-anthryl)-2-pyrazoline/1-acetyl-3-naphthyl-5-(9-anthryl)-2-pyrazoline as donors and tetracyanoquinodimethane as the acceptor by a solution crystallization method. The resulting encapsulated charge-transfer complexes (Ct2–Ct4 ) characterized by single crystal X-ray diffraction (SCXRD) analysis showed the formation of channels in the supramolecular architecture through various non-covalent interactions. Interestingly, Ct1 demonstrated remarkable selectivity towards p -xylene over the other xylene isomers to form theCt1 · p -xylene inclusion complex.Ct2 andCt3 contain p -xylene, whereasCt4 features p -chlorotoulene. Moreover, the closely matched powder X-ray diffraction (PXRD) profile revealed thatCt2 andCt1 · p -xylene are isomorphic.