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1.
Ergün Gonca 《高分子科学杂志,A辑:纯化学与应用化学》2017,54(9):589-597
The reaction of (5-hydroxypentylthio magnesium porphyrazine) with 2-methoxy-4,6-bis(trifluoromethyl)benzoic acid in DCCI and PTSA, esterified MgPz having [5-thiopentyl 2-methoxy-4,6-bis(trifluoromethyl)benzoate] substituent was obtained. Further reactions of the metal-free porphyrazine with M2+(Mg, Co, Cu, Zn, Fe) acetates have produced the metallo-porphyrazines. Finally, by the reaction of FePzCl with pyridine or pyrazine compounds, [FePz(py)2] and [FePz(pyz)]n complexes were prepared as the novel stable complexes, respectively. The target compounds have been characterized by using different spectroscopic methods such as FT-IR, UV-Vis, mass, 1H, 13C, and 19F NMR together with elemental analysis. The aggregation and the solubility features were indicated in various concentrations and solvents. 相似文献
2.
Mehmet Burçin Pişkin Aysel Kantürk Figen Hatice Ergüven 《Research on Chemical Intermediates》2013,39(2):569-583
In this study, the solid-state reaction mechanism and kinetics were investigated for production of anhydrous sodium metaborate (NaBO2), an industrially and technologically important boron compound. To assess the kinetics of solid-state production of NaBO2, the chemical reaction between borax (Na2B4O7) and sodium hydroxide (NaOH) was investigated by use of the thermal analysis techniques thermogravimetry (TG) and differential thermal analysis (DTA). DTA curves obtained under non-isothermal conditions at different heating rates (5, 10 and 20 °C/min), revealed five endothermic peaks corresponding to five solid-state reactions occurring at 70, 130, 295, 463, and 595 °C. The stages of the solid-state reaction used for production NaBO2 were also analyzed by XRD, which showed that at 70 and 130 °C, Na2B4O7 and NaOH particles contacted between the grains, and diffusion was initiated at the interface. However, there was not yet any observable formation of NaBO2. Formation of NaBO2 was initiated and sustained from 295 to 463 °C, and then completed at 595 °C; the product was anhydrous NaBO2. Activation energies (E a) of the solid-state reactions were calculated from the weight loss based on the Arrhenius model; it was found that in the initial stages of the solid-state reaction E a values were lower than in the last three steps. 相似文献
3.
Leyla Gündoğdu Nihan Şen Cevher Gündoğdu Hızlıateş Mustafa Yavuz Ergün 《Journal of fluorescence》2017,27(6):2095-2100
Four new carbazole-oxadiazole derivatives (3a-b, 6a-b) were prepared from the reaction of aromatic aldehydes and carbohydrazides which were synthesized from carbazole aldehydes namely 9-hexyl-9H-carbazole-3-carbaldehyde 1 and 4-(9H-carbazole-9-yl)benzaldehyde 4 and acid hydrazides. The structures of the new derivatives were confirmed by 1H-NMR and FT-IR. The optical properties such as maximum absorption and emission wavelengths (λ; nm), molar extinction coefficients (ε; cm?1 M?1), Stoke’s shifts (ΔλST; nm) and quantum yields (?F), of the carbazole-oxadiazole derivatives were declared in dichloromethane, toluene and tetrahydrofuran solutions. 相似文献
4.
Güleç Özcan Türkeş Cüneyt Arslan Mustafa Demir Yeliz Yeni Yeşim Hacımüftüoğlu Ahmet Ereminsoy Ergün Küfrevioğlu Ömer İrfan Beydemir Şükrü 《Molecular diversity》2022,26(5):2825-2845
Molecular Diversity - The acetylcholinesterase and carbonic anhydrase inhibitors (AChEIs and hCAIs) remain key therapeutic agents for many bioactivities such as anti-Alzheimer and antiobesity... 相似文献
5.
Cevher Gündoğdu Hızlıateş Sibel Gülle Yavuz Ergün 《Journal of heterocyclic chemistry》2016,53(1):249-254
The novel heterocyclic compounds that have cycloalk[b]indole moiety bearing spiropiperidinone and spiropiperidinedione ( 3a , 3b , 3c , 5a , 5b , 8a , 8b , and 10a ) were synthesized for the first time. The synthesis of spiropiperidinone and spiropiperidinedione structures was performed by a new method. These compounds are similar to sedative and hypnotic drugs such as methyprylon, glutethimide, and thalidomide. 相似文献
6.
H. A. Ergül S. Topcuo?lu E. Ölmez Ç. K?rbaşo?lu 《Journal of Radioanalytical and Nuclear Chemistry》2006,268(1):133-136
Summary Radionuclide (137Cs, 238U, 232Th and 40K) concentrations were determined in a sediment trap and bottom sediment samples collected from a station at the eastern Turkish
coast of the Black Sea. The specific activity of the 137Cs radionuclide in the settling particles ranged from 0.04±0.01 to 0.10±0.02 Bq. g-1dry weight. The calculated flux rate of the 137Cs was between 0.37 and 2.59 Bq. m-2. d-1in the sampling periods of 2002 and 2003. The 137Cs concentration in the bottom sediment profile were between 0.039±0.013-9.083±0.017 Bq. g-1dry weight in the same station. The vertical profile of the radionuclides suggests that they have little mobility during the
17 years after the Chernobyl accident. 相似文献
7.
Natural diatomaceous earth (DE) is modified by flux calcination and refluxing with acid. To characterize natural DE, modified DE's [flux calcinated (FC)DE and FCDE-I] and silica gel 60GF(254) (Si-60GF(254)) are analyzed microscopically, physically, and chemically by various techniques. FCDE-I and Si-60GF(254) are investigated for their usefulness in the stationary phase of thin layer chromatography (TLC) both individually and in composition. Sodium diethyldithiocarbamate (DEDTC) and ammonium pyrrolidinedithiocarbamate (PyDTC) are prepared as Co or Cu (M) complexes [M(DEDTC)(2) and M(PyDTC)(2), respectively]. These complexes and their mixtures are run on thin layers of Si-60GF(254) and FCDE-I individually, and on various FCDE-I and Si-60GF(254) mixtures. Pure toluene and various toluene-cyclohexane mixtures (3:1, 1:1, 1:2, 1:3, v/v) are used as mobile phases for the running the complexes. The best analytical separations of both M(DEDTC)(2) and M(PyDTC)(2) complexes are obtained when using pure toluene and toluene-cyclohexane (3:1, 1:1, v/v) as mobile phases on FCDE-I-Si-60GF(254) (1:3, 1:1, w/w) layers as stationary phases. This study shows that it is possible to qualitatively analyze and to satisfactorily separate a mixture Cu(2+) and Co(2+) cations on cited chromatographic systems. 相似文献
8.
The synthesis of 11‐methyl‐6H‐pyrido[4,3‐b]carbazole‐1(2H)‐one (5), which can be important for the synthesis of other pyridocarbazole alkaloids and especially 1‐substituted ellipticines, is described. Construction of the tetracyclic structure was achieved by a new route and two important precursor compounds (4a and 4b) for the synthesis of pyridocarbazole alkaloids and also many new tetrahydrocar‐bazole derivatives (7, 8, 9, 10, 11, 12, 13) were synthesized. 相似文献
9.
C N Carducci M Matejka H Ergüven N Labonia A Mamianetti 《Journal of chromatography. A》1985,337(1):91-97
A high-performance liquid chromatographic procedure has been developed for the determination of pentamidine concentrations in serum samples. A microbore, reversed-phase column was used with a mobile phase consisting of methanol and water with sodium heptanesulfonate and triethylamine as modifiers. Pentamidine could be extracted from serum only by the addition of an ion-pairing agent, di(2-ethylhexyl) phosphoric acid, to the chloroform used for extraction. The method can be used to reliably detect levels as low as 5 ng/ml. The pentamidine concentration in the serum of eleven patients 24 h after their tenth daily dose of pentamidine averaged 60 +/- 34 ng/ml. 相似文献
10.
Ziya Kantarci Celal Batyak Ergün Kasap 《Journal of inclusion phenomena and macrocyclic chemistry》2001,39(1-2):103-108
Infrared spectra of Mn(NH3)2Zn(CN)4.2C6H6 andMn(ethylenediamine)Zn(CN)4.2C6H6 are reported. The spectral data suggest that these compounds are similar in structure toHofmann-Td-type and the en-Td-type clathrates,respectively. There is good evidence for H-bonding from ammoniaN–H to benzene as a to H-bond. 相似文献