Bulky-substituted phthalodinitriles and cobalt and copper phthalocyanines based on them: synthesis, thermal analysis and spectroscopic properties

Abstract The aim of this work was to study the effect of the microwave radiation on the thermal and spectroscopic features, as well as about arrangement (order-disorder) and morphological properties, of the layered manganese oxide with birnessite-type structure. The route employed to obtain Na-birnessite matrix was redox precipitation. The products were characterized by X-ray diffraction, thermal analysis (TG-DTG-DSC), infrared (FTIR) and Raman spectroscopy, scanning electron microscopy (SEM) and nitrogen adsorption-desorption technique. The results showed that microwave radiation influenced in a short time (5 min) the octahedral ordering of birnessite, as well as in increasing the crystallite size. Thermal analysis showed that the thermal behavior of the lamellar matrix was different from that of birnessite under microwave radiation. After microwave-assisted hydrothermal treatment, FTIR and Raman spectroscopy investigations were used to differentiate ordered and disordered birnessites. Otherwise, there were no changes in SEM morphology of the lamellar-type phases, but the particle size changed.

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Four copper(II) diclofenac complexes with pyridine derivatives: Synthesis, crystal structures, spectroscopic properties, thermal analysis and catechol oxidase activities

Inorganica Chimica Acta ◽

10.1016/j.ica.2013.09.013 ◽

2013 ◽

Vol 408 ◽

pp. 131-138 ◽

Cited By ~ 19

Author(s):

Sema Caglar ◽

Ismihan E. Aydemir ◽

Ekrem Adıgüzel ◽

Bulent Caglar ◽

Serkan Demir ◽

...

Keyword(s):

Thermal Analysis ◽

Crystal Structures ◽

Spectroscopic Properties ◽

Catechol Oxidase ◽

Pyridine Derivatives

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Synthesis and some spectroscopic properties of tetra-2,3-pyridoporphyrazinatosilicon involving bulky axial ligands

Journal of Porphyrins and Phthalocyanines ◽

10.1002/1099-1409(200008)4:5<538::aid-jpp268>3.0.co;2-g ◽

2000 ◽

Vol 04 (05) ◽

pp. 538-543 ◽

Cited By ~ 6

Author(s):

TARO NONOMURA ◽

NAGAO KOBAYASHI ◽

TATSUYA TOMURA

Keyword(s):

Thermal Analysis ◽

Electronic Absorption ◽

Nmr Spectra ◽

Electronic Absorption Spectra ◽

Spectroscopic Properties ◽

Molecular Orbital Calculations ◽

Face To Face ◽

Axial Ligands ◽

20 Nm ◽

Thermal Stability Of

Tetra-2,3-pyridoporphyrazinatosilicon ( SiPyD ) containing bis(tri-n-hexylsiloxy) (1) or bis(n-heptylcarbonyloxy) (2) axial ligands have been prepared and characterized by NMR, IR and electronic absorption spectroscopies and by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). These SiPyDs are soluble in common organic solvents, and face-to-face-type stacking is prevented in solution and films. Accordingly, their NMR spectra could be reasonably assigned. Their electronic absorption spectra in solution appear to the blue and red compared with those of the corresponding Si phthalocyanines ( SiPcs ) and Si tetrapyrazinoporphyrazines ( SiPyZs ) respectively. These characteristics are reproduced by molecular orbital calculations in the framework of the Pariser-Parr-Pople approximation. On formation of films, the Q bands shift to the red of those in solution by ca 20 nm, suggesting that other similar tetravalent metallophthalocyanines with two long axial ligands can be used for shifting the Q band to the red. TGA and DTA experiments show that the thermal stability of the macrocycles is markedly influenced by the type of axial ligands.

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