[fe₃o₄@sio₂@si-pr-nme₂-et-nhme₂][fecl₄][hso₄] as a novel and effectual catalyst for the fabrication of 14-aryl-14h-dibenzo[a,j]xanthenes

A new magnetic nanomaterial namely [fe3o4@sio2@si-pr-nme2-et-nhme2][fecl4][hso4] (fspnfh) was constructed, and characterized using eds, elemental mapping, ft-ir, fe-sem, vsm, xrd and tg analyses. thereupon, fspnfh was exploited as a magnetically recoverable catalyst for the fabrication of 14-aryl-14h-dibenzo[a,j]xanthenes via the condensation of aryl aldehydes (1 eq.) with 2-naphthol (2 eq.) under solvent-free conditions. the xanthene derivatives were obtained in high yields (89-97%) and short times (15-30 min). fspnfh was reused for two times without significant diminishing in its activity.