Several tetra- and octaglycosylated PcZn 's 1a, 2a–2d, 3a-b and 4 were investigated for their aggregation behavior using different concentrations of the PcZn -species in pure DMSO, water and in various DMSO/water mixtures by comparing their UV-vis spectra. The PcZn 's 1–4 are independent of the concentration in pure DMSO and in up to 25 vol.% water/DMSO mixtures are non aggregated. Increasing amounts of water leads to higher aggregation ratios. The aggregation behavior is influenced by the nature and the position of the sugar substituents on the Pc-ring. PcZn 4 was found the least aggregated compound even in pure water.
New 5-(4-bromophenyl)-3, 7,12,13,17,18-hexamethyl-2,8-dipentyl-and 5,15-bis(4-bromophenyl)-2,8,12,18-tetramethyl-2,8,12,18-tetrapentylporphyrins (H 2 P-1 and H 2 P-2) and their zinc metal complexes (ZnP-1 and ZnP-2, respectively) were synthesized in high yields by condensation of β-tetraalkylsubstituted dipyrromethanes with 2-formyl-3,4-dialkylpyr-[a] IPCE RAS, Leninskiy prospekt 31-4, Moscow 119071, Russian Federation 5979 roles or 4-bromobenzaldehyde and subsequent metallation. X-ray analysis data showed the formation of axial complexes of ZnP-1 and ZnP-2 with the solvent molecules of THF and dioxane in the solid state. Coordination of ZnP-1 with dioxane led to polymer multidecker structures.
Results and DiscussionThe obtained meso-(bromophenyl)-substituted β-octaalkylporphyrins efficiently combine features of synthetic and natural porphyrins. The alkyl substituents inherent to www.eurjic.org
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