Double-decker Yttrium(III) Complexes with Phthalocyaninato and Porphyrinato Ligands

Abstract

A series of new yttrium(III) double-decker complexes with the same and different phthalocyaninato and porphyrinato ligands has been prepared. The homoleptic complexes Y ( P ) 2 ( P = Pc *(C 7 H 15 ) 8 , Pc *( OC 5 H 11 ) 8 ; Pc * = 2,3,9,10,16,17,23,24-octasubstituted phthalocyaninate) have been synthesized by treating yttrium(III) acetylacetonate ( Y ( acac ) 3 · H 2 O ) with the phthalonitriles C 6 H 2 R 2 ( CN ) 2 ( R = C 7 H 15 , OC 5 H 11 ) in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU). The heteroleptic analogues Y ( P )( Pc ) ( P = Pc *( C 7 H 15 ) 8 , Pc *( OC 5 H 11 ) 8 ; Pc = unsubstituted phthalocyaninate) and Y ( P )( Por ) ( P = Pc , Pc *( C 7 H 15 ) 8 ; Por = meso-tetraphenylporphyrinate (TPP), meso-tetra(4-pyridyl)porphyrinate (TPyP)) have been prepared by the base-catalysed tetramerization of the corresponding phthalonitriles using Y ( P )( acac ) ( P = Pc , TPP , TPyP ) as templates. The syntheses along with the spectroscopic and electrochemical properties of these novel double-deckers are described.