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A series of five new heteroleptic mononuclear derivatives of aluminium(III) have been synthesized and characterized. Complexes [(CH 3 COCH 2 COCH 3 ) 2 Al(1a)]  2a , [(CH 3 COCH 2 COCH 3 ) 2 Al(1b)]  2b , [(CH 3 COCH 2 COCH 3 ) 2 Al(1c)]  2c , [(CH 3 COCH 2 COCH 3 ) 2 Al(1d)]  2d  and [(CH 3 COCH 2 COCH 3 ) 2 Al(1e)]  2e  were obtained by treating Al(OPri) 3  with acetylacetone and bidentate ligands (developed by treating phenanthridine and salicylaldehyde)  1a – 1e  ( 1a  = C 27 H 21 NO;  1b  = C 28 H 23 NO 2 ;  1c  = C 34 H 33 NO 4 ;  1d  = C 27 H 20 BrNO;  1e  = C 27 H 20 N 2 O 3 ) in 1:2:1 stoichiometry using anhydrous benzene as solvent. All the newly synthesized aluminium(III) complexes were characterized by NMR ( 1 H and  13 C), FTIR, HPLC, HRMS and elemental analysis. Derivatives  2a-2e  were confirmed by dept-135 and HSQC also. Complex 2a was employed as precursor for the synthesis of active alumina by well-established sol-gel technique. Nanostructured alumina was confirmed by powder XRD, FTIR, TGA-DTA and BET surface area, Fe-SEM and TEM analyses. Alumina synthesized from  2a  was used for photodegradation of rhodamine-B and methyl orange dyes that resulted in remarkably high (&gt;93%) decolorization within 140 minutes exposure of natural sunlight.

journal of coordination chemistry

Photodegradation of rhodamine-B and methyl orange employing nano-alumina developed from new aluminium(III) complex(es) associated with phenanthridine-salicylaldehyde derived ligands