Semih Gördük

• PhD
• Professor (Associate) at Yıldız Technical University

In this study, Silicon Dioxide (SiO 2 ) doped nano Titanium Dioxide (TiO 2 ) nanocomposites were prepared by hydrothermal method and under different reaction conditions. The reason for doping with nano SiO 2 is to ensure that nano TiO 2 gains photocatalytic activity in the visible region instead of showing photocatalytic properties only under ultra...

Recent advances in the construction of ternary composite electrodes have revealed new strategies for energy storage applications. For energy storage applications, supercapacitors have attracted significant attention owing to their fascinating electrochemical performance and combining advantages. In this study, a facile and one-step electrochemical...

Supercapacitors (SCs) are the most interesting alternative energy storage and conversion systems to successfully overcome the global energy problem for future generations. A lot of work has been done to improve the capacitive performance of an electrode and to achieve high power and energy density. Here, we prepared hybrid composite materials consi...

In this work, copper and zinc including metal organic frameworks (MOFs) have been synthesized and used as additives in polypyrrole based electronically conducting polymers (ECPs) as electrode materials of supercapacitors for the first time in the literature. Prepared powders of metal organic frameworks are characterized by using of spectroscopic me...

Phthalocyanines (Pcs) are macrocyclic compounds of great importance. Different metals and ligands can be used in the synthesis of Pc compounds and it seems interesting that these give different properties to Pcs. Thus, the usage areas of Pcs have been increasing day by day. One of the most important areas of use of Pcs is photodynamic therapy (PDT)...

In this study, phthalocyanine (Pc)–TiO2 nanocomposites were prepared via in situ hydrothermal method. The metal-free, zinc(II), cobalt(II), nickel(II) and copper(II) Pc compounds were used for formation of nanocomposites. A total of 5 different Pc–TiO2 nanocomposites was successfully prepared by hydrothermal method. The prepared nanocomposites were...

In present study, peripherally tetra-substituted metal-free (H2Pc), Mg(II) (MgPc) and In(III)CI (InPc) phthalocyanine compounds containing carboxylic acid moieties were synthesized and characterized by various spectroscopic techniques. Photophysical, photochemical and aggregation properties of these compounds, which are show good solubility in DMSO...

In this work, we aimed to prepare three different metallo phthalocyanine/functionalized-multiwalled carbon nanotube/polyaniline/pencil graphite electrode (MPc/f-MWCNT/PANI/PGE) modified electrodes with high specific capacitance, high energy and power densities, and long cycle life for supercapacitors. In this concept, ZnPc/f-MWCNT/PANI/PGE, CuPc/f-...

In the present work, the synthesis, characterization, photophysicochemical and aggregation properties of non-peripherally tetra-substituted metal-free (H2Pc), Mg(II) (MgPc), Zn(II) (ZnPc), and In(III)CI (InCIPc) phthalocyanines containing tetra (2,3-dihydro-1,4-benzodioxin-2-ylmethoxy) moieties were reported. The spectroscopic techniques were appli...

In this study, tetra-substituted copper(II) phthalocyanine-graphene modified pencil graphite electrode (CuPc-Gr/PGE) was developed for the amperometric determination of hydrogen peroxide (H2O2) for the first time in the literature. The developed non-enzymatic electrode platform was electrochemically characterized by cyclic voltammetry (CV) and elec...

In the present work, we report one‐step preparation of phthalocyanine/acid‐activated multiwalled carbon nanotube/polypyrrole modified pencil graphite electrodes (Pc/AA‐MWCNT/PPy/PGE) for electrochemical supercapacitor applications. Conducting polymer‐based ternary electrode materials were prepared by in situ electropolymerization of pyrrole in the...

This study presents the synthesis, characterization, photochemical, photophysical and aggregation properties of novel 4-((1,2,2,6,6-pentamethylpiperidin-4-yl)oxy)phthalonitrile (HOPEMP-Pht) and its highly soluble peripherally tetra-substituted Mg(II) (HOPEMP-MgPc), Zn(II) (HOPEMP-ZnPc), and In(III)CI (HOPEMP-InPc) phthalocyanine derivatives as a ph...

In this study, the synthesis and characterization of novel 4-chloro-5-((2,3-dihydrobenzo-1,4-benzodioxin-2-yl)methoxy)phthalonitrile (1) and its peripherally octa-substituted Zn(II) (Pc-Zn), In(III) (PcInCI) and Mg(II) (Pc-Mg) phthalocyanine (Pc) derivatives are reported for the first time. FT-IR, elemental analysis, UV-vis, NMR and MS techniques w...

The synthesis of metallophthalocyanines (M = Zn (1), In (2), Co (3), Cu (4), Ni (5) and Mg (6)) derived from (2E)-3-[4-(2,3-dicyanophenoxy)-3-methoxyphenyl]prop-2-enoic acid on non-peripherally positions were achieved. These compounds were characterized by joining of elemental analysis, FT-IR, ¹H NMR, ¹³C NMR, UV–Vis, and mass spectroscopic techniq...

In this study, we reported synthesis, characterization, photophysical, photochemical and aggregation properties of new non-peripherally tetra-substituted Zn(II) (FA-ZnPc) and In(III) (FA-InPc) phthalocyanine photosensitizers bearing ferulic acid units. The synthesized compounds were characterized by Elemental analysis, FT-IR, UV–vis, NMR and MS tec...

In this study, carboxylic acid terminated Zn(II), Cu(II), Co(II) and Ni(II) phthalocyanine dyes were synthesized using 3-(4-(3,4-dicyanophenoxy)-3-methoxyphenyl)acrylic acid. Phthalocyanine dyes were characterized by elemental analysis, FT-IR, UV–Vis, ¹H-NMR and MALDI-TOF MS techniques. The sensitizing abilities of these dye molecules in standard d...

In this study, two new coordination polymers of Cu(II) and Cd(II) ions with pyrazine-2,3-dicarboxylic acid and 1-vinylimidazole were synthesized. The structures of these coordination polymers were characterized with elemental analysis, infrared spectroscopy, thermal analysis, powder X-ray diffraction, and magnetic susceptibility techniques. Accordi...

A novel copper(II) phthalocyanine (CuPc) modified multiwalled carbon nanotube-based electrode was prepared for sensitive electrochemical detection of bisphenol A in this work. The synthesized novel CuPc was characterized by spectroscopic methods. Pencil graphite electrode was modified by the adsorption method to obtain CuPc modified multiwalled car...

In this study, novel peripherally ferulic acid tetra-substituted Zn(II) phthalocyanine was synthesized for the first time. The synthesized phthalocyanine was characterized by elemental analysis, infrared spectroscopy, UV-Vis spectrophotometry,¹H-NMR spectroscopy, and MALDI-TOF MS techniques. The photophysical, photochemical and aggregation properti...

This article reports the electrochemical determination of paracetamol (PC) in the presence of ascorbic acid (AA) and caffeine (CF) using an electrochemically treated pencil graphite electrode. In this study, we describe the use of an electrode prepared by overoxidation between 0.0 and +2.1 V for paracetamol determination. The electrochemically trea...

We studied the synthesis and characterization of polymeric coordination complexes of Co(II) and Ni(II) ions with pyrazine-2,3-dicarboxylic acid and 1-vinylimidazole. The e lemental analysis, infrared spectroscopy, powder X-ray diffraction, magnetic susceptibility, thermal analysis and X-ray single crystal techniques were used in the characterizatio...

New metal-free and metallophthalocyanine compounds (Zn, Co, Ni, and Cu) were synthesized using 2-hydroxymethyl-1,4-benzodioxan and 4-nitrophthalonitrile compounds. All newly synthesized compounds were characterized by elemental analysis, FT-IR, UV-Vis, ¹ H-NMR, MALDI-TOF MS, and GC-MS techniques. The applications of synthesized compounds in Schottk...

This article is the first to report the direct, one-step synthesis of molybdenum blue (MB) in solid state, via application of cyclic voltammetry. Electrochemical synthesis of MB was carried out in a three-electrode cell in 1.0 M sulfuric acid and at the appropriate amount of sodium molybdate dihydrate. Both a pencil graphite electrode and a platinu...

In this study, novel 2-hydroxymethyl-1,4-benzodioxane substituted phthalonitrile ligand (1) and its non-peripherally tetra-substituted phthalocyanine derivatives with metal-free (2), zinc(II) (3), cobalt(II) (4), nickel(II) (5) and copper(II) (6) were synthesized. These compounds were characterized by several techniques including elemental analysis...

A novel multicomponent system consisting of benzene-1,4-diyldimethanimine bridged dimeric zinc-phthalocyanine groups was synthesized. Firstly, a novel unsymmetrically nitro and 2,4-di-tert-butylphenoxy groups substituted zinc (II) phthalocyanine was synthesized and then nitro group was reduced to amino functional group. All newly synthesized compou...

A new imidazo[4,5-f][1,10]phenanthroline (imp) derivative imidazo-N⁵,N⁶-bis((4-(1H-imidazo[4,5-f][1,10]phenanthroline-2-yl)phenyl)methylene)-1,10-phenanthroline-5,6-diamine (impap) was synthesized in five steps starting from bare phenanthroline (phen) precursors. The novel compound was fully characterized by ¹H-NMR, IR, elemental analysis and elect...

We investigated the use of an overoxidized nanofiber polypyrrole (OONfPPy) modified pencil graphite electrode (PGE) as a sensor for the determination of dopamine (DA) in this work. The performance of the modified electrode was studied using differential pulse voltammetric method. The surface of the modified electrode was characterized by an electro...

In this work, Ag doped nano TiO2 photocatalysts were synthesized in powder form by hydrothermal method at 180 ºC in 120 min using different reduction agents. The synthesized powders were characterized by powder X-ray diffraction (XRD), Energydispersive X-ray spectroscopy (EDS), Surface area measurements (BET), Transmission electron microscopy (TEM)...