polynuclear metal complexes containing azacrown moieties

The novel (E,E)-dioxime,7,8-bis(hydroxyimino)-1,14-bis(monoaza[8]crown-6)-benzo[f]-4,11-dioxa-1,14-diazadecane[7,8-g]quinoxaline (H2L), has been synthesized by the reaction of 6,7-diamino-1,12-bis(monoaza[18]crown-6)benzo[f]-4,9-dioxa-1,12-diazadecane (4) which has been prepared by the reduction of 6,7-dinitro-1,12-bis(mono-aza[18]crown-6)benzo[f]-4,9-dioxa-1,12-diazdecane (3) and cyanogendi-N-oxide. Mononuclear Ni-II and Cu-II complexes of H2L have a metal:ligand ratio of 1:2 and the ligand coordinates through two hydroxyimino nitrogen atoms, as do most of the (E,E)-dioximes. The hydrogen-bridged Ni-II was converted into its BF2+ capped anologue by the reaction with BF3 center dot Et2O. The reaction of the Cu-II complex with 2,2'-dipyridyl as an end-cap ligand gave the homotrinuclear complex. Structures for the ligand and its complexes are proposed in accordance with elemental analysis, magnetic susceptibility measurements, H-1, C-13-n.m.r, IR and MS spectral data

Synthesis and characterization of novel vic-dioxime and its mononuclear complexes containing tetraazadioxamacrobicyclic moieties

A (E, E)-dioxime, N,N′-bis(7-aminobenzo-17,23-dimethyl-4,11-dioxa-1, 14,17,23-tetraazapentacyclo[12.10.100.5,10]hexadiconta-1,5,7,12,14-pentane) diaminoglyoxime (H2L) has been synthesized from (E, E)-dichloroglyoxime and 7-aminobenzo-17,23-dimethyl-4,11-dioxa-1,14,17,23-tetraazapentacyclo[12.10.100. 5,10]hexadiconta-1,5,7,12,14-pentane which has been prepared from 7-nitro-17,23-dimethyl-4,11-dioxa-1,14,17,23-tetraazapentacyclo[12.10.100.5,10] hexadiconta-1,5,7,12,14-pentane. A mononuclear Ni(II) complex with a metal : ligand ratio of 1 : 2 was prepared and then a Ni(II) complex bridged with BF2+ was obtained by reaction with boron trifluoride etherate. The structure of the dioxime and its transition metal complexes are proposed according to elemental analysis, 1H NMR, IR and mass spectral data. © 2008 Taylor & Francis

Synthesis, characterization, and photocatalytic evaluation of manganese (Iii) phthalocyanine sensitized znwo4 (znwo4mnpc) for bisphenol a degradation under uv irradiation

ZnWO4MnPcwassynthesizedviaahydrothermalautoclavemethodwith1wt.%manganese (iii) phthalocyanine content. The material was characterized for its structural and morphological features via X-ray diffraction (XRD) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, transmission emission microscopy (TEM), scanning electron microscopy-Energy dispersive X-ray spectroscopy (SEM-EDX), N2 adsorption-desorption at 77K, X-ray photoelectron spectroscopy (XPS), and UV-visible/diffuse reflectance spectroscopy(UV-vis/DRS). ZnWO4MnPc photocatalytic performance was tested on the degradation of bisphenol A (BPA). The ZnWO4MnPc material removed 60% of BPA after 4 h of 365 nm UV irradiation. Degradation process improved significantly to about 80% removal in the presence of added 5 mM H2O2 after 4 h irradiation. Almost 100% removal was achieved after 30 min under 450 nm visible light irradiation in the presence of same concentration of H2O2. The effect of ions and humic acid (HA) towards BPA removal was also investigated. © 2020 by the authors

Comparative nonlinear optics and optical limiting properties of metallophthalocyanines

Biyiklioglu, Zekeriya/0000-0001-5138-214XWOS: 000454151300043In this study, peripherally tetra-{2-[[4-((E)-{[4-dimethylamino)phenyl]imino}methyl)phenyl](methyl)amino]ethoxy} substituted cobalt(II), manganese(III), copper(II) phthalocyanines 2a-2c and axially di-{2-[[4-((E)-{[4-(dimethylamino)phenyl]imino}methyl)phenyl](methyl)amino]ethoxy} substituted silicon phthalocyanine 3 were synthesized for the first time. These compounds were characterized by standard spectroscopy methods. Their nonlinear optical properties are evaluated with the help of z-scan technique. Both open and closed aperture configurations show clear z-scan signal in the four samples. The refractive nonlinear index n(2) is found to be ranging between -4.9 and -28.1 x 10(-8) cm(2)/W, and the nonlinear absorptive coefficient varied between 0.2 and 5.4 x 10(-3) cm/W. The optical limiting measurements showed low threshold levels, 645 W/cm(2) in 2c and 680 W/cm(2) in 2a in full agreement with Z-scan measurements.Research Fund of Karadeniz Technical University, Trabzon, TurkeyKaradeniz Teknik UniversityThis study was supported by The Research Fund of Karadeniz Technical University, Trabzon, Turkey

Synthesis of axially disubstituted silicon phthalocyanines and investigation of their in vitro cytotoxic/phototoxic anticancer activities

In this study, two SiPcs have been selected and the photodynamic therapy potentials were evaluated of the Pcs. Synthesis of Axially 2-decyn-1-oxy disubstituted Es-SiPc-2 was newly synthesized by the reaction of SiPcCl2 with 2-decyn-1-ol in the presence of NaH in toluene. Furthermore, their nuclear imaging potentials were evaluated in human colon adenocarcinoma (HT-29) and human lung fibroblast cell (WI-38) cell lines. The uptake results have indicated that Es-SiPc labeled with 131I radionuclide (131I-Es-SiPc) was approximately 2-fold higher in the HT-29 cell line than the WI-38 cell line. In other words, the target/non-target tissue ratio is defined as two in the HT-29/WI-38 cell lines. Besides, the uptake values of 131I-Es-SiPc were found to be higher than 131I-Es-SiPc-2. 131I-Es-SiPc and 131I-Es-SiPc-2 are promising for imaging or treating colon adenocarcinoma. In vitro photodynamic therapy (PDT) studies have shown that both compounds are suitable and can be used in this field. Also, Es-SiPc has been shown to have higher phototoxicity than Es-SiPc-2. © 2020 World Scientific Publishing Company