title: Synthesis, characterization and nonlinear absorption of novel octakis-POSS substituted metallophthalocyanines and strong optical limiting property of CuPc.
abstract: In this study, the preparation of some novel metallophthalocyanine (MPcs) complexes substituted with octakis(mercaptopropylisobutyl-POSS) functional group was achieved. By the reaction of [1-(3-mercapto)propyl-3,5,7,9,11,13,15-isobutylpentacyclo[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxane 1 with 4,5-dichloro-1,2-dicyanobenzene 2 in THF as the solvent in the presence of K2CO3 as the base, the phthalonitrile derivative 3 was synthesized. Compound 3 reacted with CoCl2 x 6H2O in ethylene glycol to furnish a novel cobalt(II) phthalocyanine . The tetramerization of 3 with urea and CuCl in the absence of solvent gave the novel Cu(II) phthalocyanine 4; while with Zn(OAc)2 x 2H2O in dry DMF gave the novel zinc(ii) phthalocyanine 6. The structures of the target compounds were confirmed by elemental analysis, UV/VIS, IR, MALDI-TOF MS and 1H NMR spectra. Nonlinear absorptions of MPcs in chloroform solution were investigated by using Z-scan measurement technique with 4 ns pulses at 532 nm wavelength. While CuPc 5 showed very high nonlinear absorption, MPcs 4 and 6 did not show considerable nonlinear absorption. Investigations of optical limiting properties of 5 revealed that this material is a very good candidate for optical limiting applications.
authors.affiliation: Department of Biochemistry, Division of Organic Chemistry, Gülhane Medical Academy, (GATA), Ankara, Turkey.
authors.forename: Tanju
authors.initials: T
authors.lastname: Ceyhan
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yüksek
authors.forename: H Gül
authors.initials: HG
authors.lastname: Yağlioğlu
authors.forename: Bekir
authors.initials: B
authors.lastname: Salih
authors.forename: Mehmet K
authors.initials: MK
authors.lastname: Erbil
authors.forename: Ayhan
authors.initials: A
authors.lastname: Elmali
authors.forename: Ozer
authors.initials: O
authors.lastname: Bekaroğlu
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D003486:Cyanides / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D017711:Nonlinear Dynamics; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D017646:Organosilicon Compounds / Q000737:chemistry*; D013053:Spectrophotometry
chemical_list: D003486:Cyanides; D009942:Organometallic Compounds; D017646:Organosilicon Compounds; C521417:polyhedraloligosilsesquioxane; D003300:Copper