Investigation of synthesis and some properties of the copper complexes containing imidazole ligand

The copper(II) complexes bearing tetrasubstituted imidazole derivatives containing oxygen donor as ligands (L1-6) were synthesized and characterized by spectroscopic methods, magnetic measurements, elemental and thermogravimetric analyses. The fluorescence efficiency of the ligands (L1-6) and their copper(II) complexes were investigated at r.t. in DMF solution. Theoretical calculations were performed for the copper(II) complex of L4 ligand, in this study. The molecular geometry, bond lengths, bond angles and vibrational wave numbers were calculated by using ab initio calculations based on the Hartree-Fock{HF/6-31G(d)} and the density functional theory {B3LYP/6-31G(d)} in the ground state

Thermal and kinetic analyses of 2,5-bis(2-hydroxyphenyl)thiazolo[5,4-d]thiazole

Thermal behavior and UV-Vis absorption properties of 2,5-bis(2-hydroxyphenyl)thiazolo[5,4-d]thiazole were investigated in the present study. It was found that decomposition occurs in two stages which correspond to removal of both phenolic rings and degradation of remaining core structure, respectively. After the characterization of decomposition stages, apparent activation energy values of each stage were calculated using model-free isoconversional methods (FWO and KAS). Apparent activation energies of decomposition stages are determined by both methods. Their averages are calculated as 98.232 and 123.253 kJ mol -1 in consecutive order. UV-Vis absorption properties of this compound have been determined with using different solvents. © 2014 Akadémiai Kiadó, Budapest, Hungary

Transparent-blue colored dual type electrochromic device: Switchable glass application of conducting organic-inorganic hybrid carbazole polymer

A new organic-inorganic hybrid monomer, O-2-(9H-carbazyl) ferrocenyldithiophosphonate (CzFc), was synthesized and characterized. Electropolymerization was realized with an applied potential of 1.5 V in boron trifluoride diethyl etherate (BFEE). Spectroelectrochemical and colorimetry studies have shown that P(CzFc) has transmissive colored in neutral state. For switchable glass applications, it has to be two electrochromic polymers have tranmissive states in different oxidation states. So we were constructed dual-type complementary colored polymer switchable glass derived from P(CzFc) as anodically coloring material and P(EDOT) as cathodically coloring material in sandwich configuration. Optoelectrochemical studies indicate that the reduced state of the switchable glass shows blue color for the oxidized state whereas it shows transmissive color for the reduced state. P(CzFc)/P(EDOT) device has good switching time, high optical contrasts and excellent redox stability. © 2016 The Electrochemical Society. All rights reserved

The synthesis and characterization of novel metalloporphyrazine containing crown ether linked calix[4]arene moieties

The synthesis and characterization of novel magnesium porphyrazine, peripherally symmetrically derived from 1,3-alternate 26,28-[35,36-dicyano-34,37-dithia-29,32,40,43-tetraoxa-35-en]calix[4]arene-crown-5, were carried out. This compound was prepared starting from cis-1,2-dicyano-1,2-ethylenedithiolate and 1,3-alternate 26,28-bis(5′-chloro-3′-oxapentyloxy)calix[4]arene-crown-5. The new macrocycle was characterized using the techniques of UV-vis, 1H, 13C NMR, IR, MS and elemental analysis. © 2009 Elsevier B.V. All rights reserved

Fourier transform infrared spectral evaluation for the differentiation of clinically relevant Trichophyton species

Routine mold identification methods have been established to provide actual data to facilitate reliable diagnoses in clinical laboratories, as well as the management of infection and health practice planning, particularly for dermatophytes. Some species of the Trichophyton genera, particularly T. rubrum and T. mentagrophytes complexes, exhibit more complexity in species recognition. In this study, the intriguing technique of Fourier-transform infrared (FT-IR) spectroscopy is evaluated for species recognition of Trichophyton spp. A total of 32 reference isolates, belonging to T. mentagrophytes (n. =. 7), T. rubrum (n. =. 21) complexes and Arthroderma spp. (n. =. 4), were included in the study. Numerous spectral window FTIR spectroscopy data were analyzed by principal component analysis and hierarchical clustering was performed. There were not any spectral ranges presenting clusters at the main Trichophyton species (e.g. T. rubrum, T. mentagrophytes and Arthroderma spp.). Notably, only T. violaceum (including T. yaoundei and T. soudanense) was clustered in several ranges. In intra-species evaluation, T. erinacei, belonging to the T. mentagrophytes complex, was distinguishable by FT-IR spectroscopy with different spectral range calculations. We suggested that further research with several reference and clinical isolates of Trichophyton species will be crucial to accurately identify intra-species of T. rubrum and T. mentagrophytes complexes. © 2013 Elsevier B.V