Mahmut Durmuş

Gebze Technical University

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Vefa Ahsen

Gebze Technical University

Ayşe Gül Gürek

Gebze Technical University

Tamara V. Basova

Nikolaev Institute of Inorganic Chemistry

Aseel Hassan

Sheffield Hallam University

Hikmat Banimuslem

University of Babylon

Sinem Tuncel

Gebze Technical University

Fatma Yüksel

Gebze Technical University

Aliye Aslı Esenpınar

Kırklareli University

Asuman Dakoğlu Gülmez

Gebze Technical University

Mehmet Menaf Ayhan

Gebze Technical University

Cooperative Institutions

Gebze Technical University

Nikolaev Institute of Inorganic Chemistry

Siberian Branch of the Russian Academy of Sciences

Université Claude Bernard Lyon 1

Russian Academy of Sciences

Centre National de la Recherche Scientifique

TÜBİTAK Marmara Research Center

Rhodes University

Kocaeli Üniversitesi

Novosibirsk State University

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Copper phthalocyanine/single walled carbon nanotubes hybrid thin films for pentachlorophenol detection

Sensors and Actuators B Chemical (2013)

Hikmat Banimuslem Aseel Hassan Tamara V. Basova Asuman Dakoğlu Gülmez Sinem Tuncel

Pentachlorophenol

Ellipsometry

Spin Coating

10.1016/j.snb.2013.09.059

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Citations (20)

CCDC 640849: Experimental Crystal Structure Determination

The Cambridge Structural Database (2009)

Fatma Yüksel Ayşe Gül Gürek Mahmut Durmuş İlke Gürol Vefa Ahsen

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccphvkk

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Composites of liquid crystalline nickel phthalocyanine with gold nanoparticles: Liquid crystalline behaviour and optical properties

Dyes and Pigments (2014)

Tamara V. Basova Roman G. Parkhomenko И. К. Игуменов Aseel Hassan Mahmut Durmuş

10.1016/j.dyepig.2014.05.033

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Citations (26)

Effect of Interface on the Orientation of the Liquid Crystalline Nickel Phthalocyanine Films

The Journal of Physical Chemistry C (2009)

Tamara V. Basova Mahmut Durmuş Ayşe Gül Gürek Vefa Ahsen Aseel Hassan

In this paper, the effect of interface on the orientation of the film of two derivatives of tetra-substituted nickel phthalocyanines NiPcR4-1 (R = −OCH(CH2OC12H25)2) and NiPcR4-2 (R = −SCH(CH2(OCH2CH2)2OC2H5)2) deposited on one substrate and between two identical substrates is studied by the method of polarized Raman spectroscopy. The methods of ultraviolet−visible (UV−vis) absorption spectroscopy and infrared (IR) spectroscopy were also used for the characterization of films deposited on quartz and KBr substrates, respectively. The orientation of columns in films confined between two substrates is characterized by polarized optical microscopy. It has been shown that the films of both compounds confined between two substrates are characterized by homeotropic alignment while no homeotropic alignments could be obtained with an air interface. The orientation is also independent of the type of substituents on the phthalocyanine ring.

Homeotropic alignment

10.1021/jp905907n

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Citations (25)

Effects of position (α or β) and linker heteroatom (O or S) of substituent on the photophysicochemical behavior of poly(oxyethylene) substituted ZnPcs and assessment of J-aggregation or protonation using TD-DFT computations

Dalton Transactions (2013)

Mehmet Menaf Ayhan Gül Altınbaş Özpınar Mahmut Durmuş Ayşe Gül Gürek

A series of zinc phthalocyanines (ZnPcs) tetra-substituted with 1,3-di[2-(2-ethoxyethoxy)ethoxy]-2-propanol () or 1,3-di[2-(2-ethoxyethoxy)ethoxy]-2-propanethiol () at peripheral (β) () and non-peripheral (α) () positions have been synthesized and characterized. The spectroscopic, photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen generation and photodegradation) properties of these newly synthesized phthalocyanines have been investigated in DMSO. The effects of the position of the substituents on the phthalocyanine skeleton and the nature of the linker heteroatom on their spectroscopic, photophysical and photochemical properties have been determined. The quenching behavior of the zinc phthalocyanines by 1,4-benzoquinone has been studied in DMSO. All of the zinc(ii) Pc complexes ( and ) showed similar electronic absorption spectra in various solvents (chloroform, dichloromethane, DMF, DMSO, THF and toluene). However, complex gave an extra red-shifted band at 742 nm in chloroform and dichloromethane. DFT and TD-DFT computations were performed on the model structures (, and ) to find out the cause of the extra red-shifted Q band (J-type aggregation or protonation of the Pc ring). The computational results showed that monoprotonation of a meso nitrogen atom leads to the formation of this extra band. Photophysical and photochemical measurements indicated that these newly synthesized ZnPc derivatives are promising candidates for use as photosensitizers in the application of PDT.

Heteroatom

Photodegradation

10.1039/c3dt51549d

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Citations (23)

Investigation of photoinduced change of dielectric and electrical properties of indium (III) phthalocyanine and fullerene doped nematic liquid crystal

Synthetic Metals (2012)

Ö. Tüzün K. Gökşen Ahmet Demi̇r Mahmut Durmuş Oğuz Köysal

10.1016/j.synthmet.2012.10.013

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Citations (29)

Corrosion inhibition of aluminum by novel phthalocyanines in hydrochloric acid solution

Journal of Materials Science (2010)

Oğuz Kaan Özdemir Aylin Aytaç Devrim Atílla Mahmut Durmuş

Hydrochloric acid

Langmuir adsorption model

Corrosion inhibitor

10.1007/s10853-010-4808-6

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Citations (32)

Optical Detection of Herbicides in Water using Dye-Modified Single Walled Carbon Nanotubes

International Journal on Smart Sensing and Intelligent Systems (2014)

Hikmat Banimuslem Aseel Hassan Tamara V. Basova Asuman Dakoğlu Gülmez Mahmut Durmuş

Abstract Hybrid materials were produced by mixing CuPcR 4 with acidified single-walled carbon nanotubes (SWCNTs) and characterised by UV-Vis absorption spectroscopy, scanning electron microscopy and atomic force microscopy. Thin films of pristine CuPcR 4 and SWCNT/CuPcR 4 were prepared by spin coating onto gold-coated glass slides and applied as active layers to detect pentachlorophenol (PCP), 2-chlorophenol, diuron and simazine in water utilizing Total Internal Reflection Ellipsometry (TIRE) as an optical detection method. Different concentrations in water ranging from 0.5 to 20 μg/L have been examined in the current work. It is revealed that the shifts in Δ(λ) spectra of SWCNT/CuPcR 4 films were evidently larger than those produced by the pristine CuPcR 4 films, indicating largely improved films’ sensitivity of the hybrid films.

Pentachlorophenol

Ellipsometry

Spin Coating

Simazine

Carbon fibers

10.21307/ijssis-2019-033

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Citations (1)

N-Doped carbon quantum dot–based ratiometric fluorescent nanosensor platforms for detection of gastric cancer-associated Helicobacter pylori genes

Microchimica Acta (2025)

Dilek Öztürk Mahmut Durmuş

Abstract Carbon quantum dot (CQD)–based fluorescent nanosensor platforms were developed using gastric cancer-associated Heliobacter pylori ( H. pylori ) genes. N-doped CQDs were synthesized using two different organic acids (citric acid and malic acid) and ethylenediamine by the microwave method. The photophysical and photochemical properties of the synthesized CQDs were investigated by ultraviolet–visible, fluorescence, and Fourier-transform infrared spectra. The surface of the synthesized N-doped CQDs was conjugated with single-stranded DNA (ssDNA), which is specific for gastric cancer. Ethidium bromide, a selective dye, shows enhanced fluorescence intensity upon intercalating with DNA. In the blue-emissive CQD-ssDNA nanoprobe system, the fluorescence intensity was quenched by ethidium bromide due to Förster resonance energy transfer (FRET) processes. When complementary ssDNA was introduced, the ethidium bromide strongly intercalated with the newly formed double-stranded DNA, shifting to a red emission. Using this ratiometric system, the detection method was improved for gastric cancer–associated genes, achieving a limit of detection (LOD) of 0.098 µM, within a concentration range 1.30 to 11.49 µM. Spike and recovery tests were also conducted to evaluate the precision of the presented method in synthetic saliva solutions, with recoveries ranging from 93.06% to 101.85% The performance of the nanosensors was compared using two different synthesized CQDs. Graphical abstract

Ethidium bromide

Nanosensor

Nanoprobe

10.1007/s00604-025-07004-4

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Photophysical, photochemical and liquid-crystalline properties of novel gallium(III) phthalocyanines

Dyes and Pigments (2010)

Fatma Yüksel Mahmut Durmuş Vefa Ahsen

Thermotropic crystal

Photodegradation

Thermogravimetric analysis

10.1016/j.dyepig.2010.12.011

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Citations (36)