Özer Bekaroğlu

Özer Bekaroğlu
Istanbul Technical University · Department of Chemistry

Prof.Dr.

About

29
Publications
1,361
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780
Citations
Additional affiliations
January 2012 - present
Marmara University
January 2012 - present
Bülent Ecevit Üniversitesi
January 2004 - present

Publications

Publications (29)
Article
The new metal-free phthalocyanine 2 and phthalocyaninatometals 3–5 (M = Ni, Co and Zn) carrying eight hydroxyethylmercapto groups on peripheral positions have been synthesized from 1,2-bis(hydroxyethylmercapto)-4,5-dicyanobenzene in the presence of a suitable anhydrous metal salt [NiCl2, CoCl2 or Zn(O2CMe)2] or hydroquinone. Zinc (II) phthalocyanin...
Article
Crosswise-disubstituted metal-free phthalocyanines carrying two 2-(trimethylamino)ethylsulfanyl and two amino groups on peripheral positions have been synthesized by 2:2 condensation of 5-[2-(dimethylamino)ethylsurfanyl]-1,3-diiminoisoindoline and 1,1,3-trichloro-5-nitro-1H-isoindole.
Article
Unsymmetrical phthalocanines (5–7) with a single macrocyclic substituent are synthesized by the reaction of the boron complex of phthalonitrile (1) with the iminoisoindoline derivatives 2–4 of macrocyclic compounds, i.e. 15-crown-5, monoaza-15-crown-5, and tetraazacyclotetradecane. The monomacrocycle-substituted phthalocyanines are less soluble tha...
Article
Metal phthalocyanines (M = Cu, Ni, Co, SnCl2) 3–6 containing four 14-membered tetraaza macrocycles have been prepared. Detosylation of the aza functions has provided donor sites for binding four Ni2+ ions giving a pentanuclear complex which is extremely soluble in polar solvents. The mass spectrum of the [hexadecakis(N-p-tosyl)-tetrakis-macrocycle-...
Article
Cyclotrimerization of 4,5-bis(hexylthio)phthalodinitrile (1) in 1-chloronaphthalene in the presence of BCl3 leads to the subphthalocyanine 4. Unsymmetrical phthalocyanines (5, 6) with six alkylthio substituents on three of the benzenoid units are synthesized by the reaction of 4 with an diiminoisoindoline derivative (R′ = H or NO2). These extremely...
Article
The new vic-dioxime ligand 2 (LH4) carrying a 14-membered N2O2 macrocycle has been prepared. Mononuclear complex (LH3)2Ni, trinuclear complexes (LH)2Cu3, (LH)2Co3, (LH)2-Pd3, and (LH)2Co3(py)3Cl3, dinuclear complex (LH3)2-(UO2)2(OH)2, and pentanuclear complex [L2Cu5(phen)2]-(NO3)2 have been synthesized from LH4. The electrochemical properties of tr...
Article
Group-IV-A phthalocyanines with four crown ether substituents have been prepared from 4′,5′-dicyanobenzo(15-crown-5), 4′,5′-diiminoisoindolino(15-crown-5), or metal-free phthalocyanine and the corresponding metal salts. The axial ligands of dichloro[tetra(15-crown-5)phthalocyaninato]silicon or -tin have been converted into dihydroxy derivatives by...
Article
A new vicinal dioxime ligand with two crown-ether groups, 1,2-bis[(monoaza[15]crown-5)-N-Yl]-glyoxime(LH2), has been prepared from cyanogen di-N-oxide and monoaza[15]crown-5. Ni(II), Pd(II), and Pt(IV) complexes of LH2 with or without alkali-metal ions bound to macrocyclic groups have been isolated. The high affinity of [Pd(LH)2] and [Ni(LH)2] for...
Article
The structure of the title compound obtained from 2(1H)-quinoxalinone oxime by the template effect of Co(II) and Ni(II) ion has been determined by three dimensional X-ray analysis.
Article
The tendency of CoII-chelates to form binuclear μ-peroxo-bridged complexes with O2 has been investigated. The nature of the ligand strongly influences the stability of such complexes. Polyamin chelates obviously fovour the bonding to O2 whereas chelates with aminopolycarboxylic acids do not show any measurable affinity for O2. The solution stabilit...
Article
A new trimeric-s-triazine containing three amino zinc(II) phthalocyanines has been prepared by following the multistep reactions of unsymmetrical substituted phthalocyanines. The zinc(II) phthalocyanine containing an unsymmetrical substituted nitro group was synthesized by means of the well-known statistically mixing method of two different phthalo...
Article
The synthesis of new metal-free and zinc(II), cobalt(II) phthalocyanines substituted with four 4-(2-N′-cyanoethyl)aminoethylsulfanyl groups is described. The new compounds have been characterized by elemental analysis and IR, 1H NMR and UV-vis spectroscopy. Copyright © 2001 John Wiley & Sons, Ltd.
Article
 A novel phthalodinitrile derivative carrying dimethylaminoethylsulfanyl groups at positions 4 and 5 was synthesized from 2-dimethylaminoethanethiol hydrochloride and 1,2-dichloro-4,5-dicyanobenzene. Its cyclotetramerization in the presence of 2-dimethylamino-ethanol or metal salts (CoCl2, Zn(OAc)2) gave metal-free or metal-containing phthalocyanin...
Article
Organic compound phthalocyanines (Pcs) are able to act as chemically sensitive films because of the various physical effects induced in them by interaction with a large number of gases. Specifically, they are used as thin film semiconducting gas sensors for the detection of halogens such as chlorine (Cl2) and nitrogendioxide (NO2) as well as organi...
Article
Cyclic voltammetry of octakis(hydroxyethylthio)-substituted phthalocyanines with 2H (H2OHETPc), Zn(II) (ZnIIOHETPc(−2)) and Co(II) (CoII(OHETPc(−2)) in the phthalocyanine core has been investigated in dimethylsulfoxide (DMSO), and some of the results were evaluated together with their absorption spectra in the visible range. The redox processes due...
Article
This paper provides a review of synthesis of the phthalocyanines containing various macrocycles at the peripheral position of the benzene rings. They are expected to be suitable to change the chemical and physical properties toward the need of technologycal applications. In addition, transition and alkali metal phthalocyanine complexes especially r...
Article
Soluble and less soluble phthalocyaninatocopper(II) derivatives (4a and 4b) were prepared from the corresponding 7-[(4′-benzo-15-crown-5)oyl]-15, 16-dibromo-2,3,6,7,8,9,11,12-octahydro-5H-benzo[e]-[1,4,10,13,7] tetraoxaazacyclopentadecine (3a) and 7-(2′-tosylaminoethyl)-15, 16-dibromo-2,3,6,7,8,9,11, 12-octahydro-5H-benzo[e]-[1,4,10,13,7] tetraoxaa...
Article
Novel phthalocyanines (M = Ni, Zn, Co) bearing eight 2′-aminophenoxy and 2′-amino phenylsulfanyl substituents on peripheral positions have been prepared starting from 4,5-bis(2′-aminophenoxy)-1,2-dicyanobenzene or 4,5-bis(2′-aminophenyl sulfanyl)-1,2-dicyanobenzene and the correspond-ing anhydrous metal salts [NiCl2, Zn(O2CMe)2, CoCI2]. Complexatio...
Article
A series of soluble tetradentate dithioglyoxime such as mono-, tri- and pentanuclear metal complexes as well as their heteronuclear polymers are investigated as sensitive materials for the detection of organic solvent vapors by utilizing quartz crystal microbalance (QCM) and interdigital capacitor (IDC) as sensor transducers. The results show compl...
Article
The synthesis of new metal-free and nickel(II) phthalocyanines substituted with four alkylthio groups SR (R = dodecyl or hexadecyl) is described. The new compounds have been characterized by elemental analyses, and IR, 1H NMR and UV/VIS spectroscopy. The thio donors co-ordinate to AgI and PdII to give 2: 1 metal–nickel phthalocyanine species. The c...
Article
(18-Crown-6)-bridged phthalocyanine network polymers 4–8 as well as a low-molecular-weight model compounds with only one phthalocyanine unit (3a, b) were prepared from tetracyanodibenzo-18-crown-6 (2a). The cyano end groups were partially converted into imido groups during the cyclotetramerization reaction, as detected from the IR spectra. In order...
Article
A copper complex of a phthalocyanine substituted with four benzo-15-crown-5 1,Cu and the corresponding dihydrogeno-derivative 1,H2 were synthesized. X-ray determinations at small angles permitted us to characterize two types of condensed phases. Solid phases with orthorhombic structure were found for 1,H2 and for 1,Cu (a=20.5, b= 18, c=4.2 Å). In t...
Article
A new one-step synthesis of 2 (1H)-quinoxalinone oxime (3) from (1,2-benzenediamine (1) and s-trans-chloroethanedial dioxime (2) is described. This oxime is converted into a new heterocyclic compound, 1,2,4,5,-tetrazino)[1,6-a: 4,3-a′]diquinoxaline (4), by the template effect of Co(II) and Ni(II) ions.
Article
Four new macrocyclic vic-dioximes, dibenzo[e,k]-2,3-bis(hydroxyimino)-1,4-diaza-7,10-dioxa-2,3,8,9-tetrahydrocyclododecine (ODIH2), dibenzo[e,n]-2,3-bis(hydroxyimino)-1,4-diaza-7,10,13-trioxa-2,3,8,9,11,12-hexahydrocyclopentadecine (OTRH2), dibenzo[e,q]-2,3-bis(hydroxyimino)-1,4-diaza-7,10,13,16-tetraoxa-2,3,8,9,11,12,14,15-octahydrocyclo-octadecin...

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