Araştırma Çıktıları
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Publication Metadata only 1 : 1 binary complexes of citric acid with some metal ions: Stability and thermodynamic parameters(WALTER DE GRUYTER GMBH, 2007) Bastug, A. Seza; Gokturk, Sinem; Sismanoglu, TubaThe stability constants of the 1:1 binary complexes of citric acid with Cu2+, Ni2+ CO2+ Mn2+ and Ce3+ were determined potentiometrically at 15.0, 25.0, and 35.0 degrees C and at an ionic strength of 0.10 mol L-1 (NaClO4). UV-VIS spectroscopic studies were also performed in order to confirm the complexes formation and the stability constants of Cu-citric acid system determined potentiometrically. The thermodynamic parameters, Delta G(o), Delta H-o, and Delta S-o were reported for the complexes formation reactions. The enthalpy and entropy changes of all binary complexes are positive.Publication Metadata only 1,2,3-Triazole incorporated coumarin carrying metal-free, Zn(II), Mg(II) phthalocyanines: Synthesis, characterization, theoretical studies, photophysical and photochemical properties(ELSEVIER SCIENCE SA, 2020) YALÇIN, BAHATTİN; Ozdemir, Mucahit; Abliatipova, Aziza; Benian, Sueda; Yalcin, Bahattin; Salan, Umit; Durmus, Mahmut; Bulut, MustafaIn this study, the preparation of two novel phthalonitrile compounds, 7-(propargyloxy)-3-(3,4-dicyanophenoxyphenyl)coumarin (1), and 7-(propargyloxy)-3-(2,3-dicyanophenoxy-phenyl)coumarin (2) were performed. Two new coumarinyl-1,2,3-triazole hybrids, (1-phenethy1-1H41,2,A-triazole 4 yl) 7 methyleneoxy 3 [F. (3,4 dicya nophenoxy)phenyl]-coumarin (3), and (1-phenethy1-1H-[1,2,3]-triazole 4 yl) 7 methyleneoxy 3 [F. (2,3 dicya nophenoxy)phenyl]-coumarin (4), were synthesized by the copper(I)-catalysed Huisgen 1,3-dipolar cycloaddition reaction of 2-(azidoethyl)benzene with terminal ethynyl bearing coumarin derivatives (1 or 2). These novel phthalonitrile derivatives (3 and 4) were converted into their peripheral (5-7) and non-peripheral (8-10) metal-free, zinc(II) and magnesium(II) phthalocyanine counterparts. The synthesized phthalocyanine derivatives are first examples on the phthalocyanine-coumarin derivatives bearing triazole ring. The structures of all these novel compounds were characterized by variety of spectroscopic techniques including FT-IR, UV-vis, H-1 NMR, MALDI-TOF MS and elemental analysis. The photophysicochemical properties of all studied Pcs (5-10) were determined in dimethyl sulfoxide. The zinc(II) and magnesium(II) phthalocyanines bearing triazole containing coumarin substituents appear to be useful as Type II photosensitizers because the singlet oxygen quantum yields ranged in acceptable values from 0.17 to 0.49 confirmed that these phthalocyanines can be suggested as photosensitizers in Photodynamic Therapy applications. Geometry optimization, frequency analysis and molecular orbital energy values of coumarin/triazole substituted phthalocyanine were performed in Density Functional Theory method using the B3LYP/LANL2DZ level of theory.Publication Metadata only 1,2,4-triazole-5(4H)-one based novel peripherally tetrasubstituted metal-free and metallophthalocyanines: Synthesis, characterization, and electrochemical and spectroelectrochemical properties(TAYLOR & FRANCIS INC, 2017) KOCA, ATIF; Aktas, Ayse; Uenlueer, Dilek; Kobak, Rabia Zeynep Uslu; Acar, Irfan; Dugdu, Esra; Koca, Atif; Kantekin, HalitIn this study, the synthesis of metal-free and metallophthalocyanines containing four 4-[2-(4-methoxyphenyl) ethyl]-5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one substituents at the peripheral positions were reported. The structures of compounds were characterized using IR, H-1 NMR, C-13 NMR, mass spectroscopies, and UV-Vis. Electrochemistry of the complexes were studied with voltammetric and in situ spectroelectrochemical measurements in different electrolytic systems. MPcs having redox inactive metal centers (H+, Zn+2, Cu+2, and Ni+2) just illustrated similar Pc-based electron transfer reactions. Due to the different effective nuclear charge of the ions in the core of Pc ring, small potential shifts and reversibility differences were observed between the redox processes of these complexes. MPcs having redox-active metal centers (Co+2 and TiO+2) gave metal-based electron transfers in addition to Pc-based processes. Electrolyte type of the measurement system significantly influenced oxidation behaviors of CoPc due to the coordination of polar coordinating solvent molecules to the oxidized Co-III center of CoPc. Spectra and color of the electrogenerated MPc species were determined with in situ spectroelectrochemical measurements.Publication Metadata only 1,3,4-thiadiazole derivatives. Synthesis, structure elucidation, and structure-antituberculosis activity relationship investigation(AMER CHEMICAL SOC, 2004) Oruc, EE; Rollas, S; Kandemirli, F; Shvets, N; Dimoglo, ASA series of 2,5-disubstituted-1,3,4-thiadiazoles were synthesized, the compounds structures were elucidated and screened for the antituberculosis activity against Mycobacterium tuberculosis H37Rv using the BACTEC 460 radiometric system. Among the tested compounds, 2-phenylamino-5-(4-fluorophenyl)-1,3,4-thiadiazole 22 showed the highest inhibitory activity. The relationships between the structures of compounds and their antituberculosis activity were investigated by the Electronic-Topological Method (ETM) and feed forward neural networks (FFNNs) trained with the back-propagation algorithm. As a result of the approach, a system of pharmacophores and anti-pharmacophores has been found that effectively separates compounds of the examination set into groups of active and inactive compounds. The system can be applied to the screening and design of new active compounds possessing skeletons similar to those used in the present study.Publication Metadata only 1,4-Dithiaheterocycle-fused porphyrazines: Synthesis, characterization, voltammetric and spectroelectrochemical properties(ELSEVIER SCI LTD, 2009) KOCA, ATIF; Tuncer, Serap; Koca, Atif; Guel, Ahmet; Avciata, UlviPorphyrazines (M = H, Mg, Zn and Co) with a 2,3-dicyano-5-phenyl-5,6-dihydro-1,4-dithiin group fused to each pyrrole unit were synthesized and characterized starting with the corresponding unsaturated dicarbonitrile derivative. The voltammetric and spectroelectrochemical characterizations of the metallo-porphyrazines (M=2H(+), Mg2+, Zn2+ and Co2+) substituted with 2,3-dicyano-5-phenyl-5,6-dihydro-1,4-dithiin groups on peripheral positions are described. Cyclic voltammetry and differential pulse voltammetry studies showed that while metal-free, magnesium, and zinc porphyrazines represented well-defined one-electron ligand-based reductions and ligand-based one-electron oxidation couples, cobalt porphyrazine gave both metal-based and ligand-based reduction and oxidation couples. Assignments of the redox couples were confirmed by spectroelectrochemical measurements. (C) 2008 Elsevier Ltd. All rights reserved.Publication Metadata only 1-[P-(BENZOYLAMINO)BENZOYL]-4-SUBSTITUTED THIOSEMICARBAZIDES - SYNTHESIS AND ANTIBACTERIAL AND ANTIFUNGAL ACTIVITIES(GOVI-VERLAG GMBH, 1992) KALYONCUOGLU, N; ROLLAS, S; SURALTINER, D; YEGENOGLU, Y; ANG, OPublication Metadata only 1-ACETYLHYDROQUINONE 4-GALACTOSIDE FROM FERULAGO-AUCHERI(PERGAMON-ELSEVIER SCIENCE LTD, 1991) DOGANCA, S; ULUBELEN, A; TUZLACI, EFrom the chloroform extracts of the aerial parts of Ferulago aucheri two coumarins osthenol, prantschimgin (marmesin senecioate), two flavonoids isorhamnetin 3-galactoside, 6-hydroxyapigenin 6-methyl ether and two new aromatic compounds 1-acetylhydroquinone 4-galactoside and quinol monoacetate were isolated. The structures were established by spectral and chemical methods.Publication Metadata only 1-Adolesanla görüşme ve öykü alma 2-Adolesanla iletişim, ebeveynlere mesajlar(Medikal Akademi, 2015-01-01) APAYDIN KAYA, MEMNUNE ÇİĞDEM; AKMAN, MEHMET; UZUNER, ARZU; CÖBEK ÜNALAN, GÜLRU PEMRA; TEKGÜL B. N., APAYDIN KAYA M. Ç., AKMAN M., ÖZMEN ÇİFTÇİ S., UZUNER A., ÜNALAN G. P., merter coşkun d., gümüşdere ş., DERMAN O., çiftçili S. S., et al.Publication Metadata only 1-p-(Benzoylamino)benzoyl-4-substituted thiosemicarbazides: synthesis and antibacterial and antifungal activities(1992) Kalyoncuoğlu, N.; Rollas, S.; Sür-Altiner, D.; Yeğenoğlu, Y.; Anğ, O.Publication Metadata only 10 Aralık 1919 Kastamonu mitinginin milli mücadele bağlamında değerlendirilmesi(2021-12-01) ÖZEL, SİBEL; ÖZEL S.Publication Metadata only 10 Aralık kadınlar mitingi(2022-12-10) ÖZEL, SİBEL; ÖZEL S.Publication Metadata only 10-65 yaş arası olgularda kranial metrik ölçümler ve paranasal sinüs ölçümleri ile yaş ve cinsiyet tespiti(2022-11-03) TURAN YURTSEVER, NURŞEN; Özdemir M., Turan Yurtsever N.Publication Metadata only 100. yılında Pendik ve mübadele(Pendik Belediyesi, 2023-01-01) KONUK HALAÇOĞLU, NEVAL; KONUK HALAÇOĞLU N.Publication Metadata only 101 soruda hadis(Duruş Yayınları, 2022-01-01) ŞAHYAR, AYŞE ESRA; ŞAHYAR A. E.101 Soruda Hadis adlı eserde hadis ilminin doğuşundan sistematiğine, sünnet ile farkından Kur’an-ı Kerim ile arasındaki bağa, ilk eserlerin yazılma süreçlerinden son yüzyılda yapılan çalışmalara kadar pek çok hususa dair akla gelebilecek sorulara yanıt aranmış, bu yanıtlar neticesinde vakıf olunması gereken bilgiler okurun istifadesine sunulmuştur.Publication Metadata only 101 soruda siyer(Duruş, 2022-01-01) KELPETİN, MAHMUT; AVCI, CASİM; KELPETİN M., AVCI C.Publication Metadata only 11th European Congress on Clinical Microbiology and Infectious Diseases - Istanbul, Turkey, 2 April 2001 - Introduction(W B SAUNDERS CO LTD, 2002) KORTEN, VOLKAN; Finch, R; Korten, VPublication Metadata only 13. küresel kriz sonrasında yeni model arayışları: Kamu-özel sektör ortaklıklarına doğru(İstanbul Ticaret Odası, 2012-01-01) ÇELEN, MUSTAFA; Çelen M..Publication Metadata only 15 Temmuz sonrası Rusya-Türkiye ilişkilerine realist bir bakış(2020-03-01) AL, ARZU; Al A.Publication Metadata only 15. yüzyıl Azerbaycan şairlerinden Kişverî'de Ali Şir Nevâyî etkisi(Eskişehir Osmangazi üniversitesi Yayınları, 2022-01-01) AY SAY, ÜMRAN; ÖZTOPRAK N., AY SAY Ü.Publication Metadata only 16. ve 18. yüzyıllar arasında Almanya da Alkol sorunu ve bunun Türk savaşlarına yansıması(2012-01-01) COŞAN, LEYLA; COŞAN L.