Pair correlation function analysis of 5-(4-hexadecyloxyphenyl)-10,15,20-tri(4-pyridyl)porphyrin and 5-(4-methoxycarbonylphenyl)-10,15,20-tri(4-pyridyl)porphyrin

Pasewicz, Anna; Idziak, D.; Koloczek, J.; Kuś, Piotr; Wrzalik, R.; Fennell, T.; Honkimäki, V.; Ratuszna, A.; Burian, A.

doi:10.1016/j.molstruc.2007.04.025

Cited by 6 publications

(2 citation statements)

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“…3(A), and are typical of all compositions. Short range order in the CGA glasses was evaluated by calculating the atomic pair distribution function (PDF) from the amorphous XRD spectra 31–34 . For PDF calculations, XRD spectra were collected from 5°–144° 2Θ at a step interval of 0.05° with a dwell time of 3 s/step, and summing up the results of three scans.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Bulk, Vitreous Cadmium Germanium Arsenide

Johnson

Riley

Sundaram

et al. 2009

Journal of the American Ceramic Society

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Cadmium germanium diarsenide glasses were synthesized in bulk form (B2.4 cm 3 ) using procedures adapted from the literature. Several issues involved in the fabrication and quenching of amorphous CdGe x As 2 (x 5 0.45, 0.65, 0.85, and 1.00, where x is the molar ratio of Ge to 1 mol of Cd) are described. An innovative processing route is presented to enable fabrication of high-purity, vitreous, crack-free ingots with sizes up to 10 mm diameter, and 30-40 mm long. Specimens from selected ingots were characterized using thermal analysis, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, particle-induced X-ray emission, Rutherford backscattering, secondary ion mass spectrometry, X-ray diffraction, density, and optical spectroscopy. Variations in properties as a function of processing conditions and composition are described. Results show that the density of defect states in the middle of the band gap and near the band edges can be decreased three ways: through suitable control of the processing conditions, by doping the material with hydrogen, and by increasing the concentration of Ge in the glass.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Bulk, Vitreous Cadmium Germanium Arsenide

Johnson

Riley

Sundaram

et al. 2009

Journal of the American Ceramic Society

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“…The majority of them did not yield monocrystals suitable for crystallographic studies. We also attempted to investigate the structure of amorphous asymmetric porphyrins using synchrotron radiation [7,8]. Such studies are burdened by severe inconveniences such as access to suitable source of radiation or handling of experimental results.…”

Section: Introductionmentioning

confidence: 99%

Aromatic C–H⋯π, C–H⋯O and parallel aromatic–aromatic interactions in the crystal structure of meso-tetrakis[4-(benzyloxy)phenyl]porphyrin

2018

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Analysis of the crystal packing of the title porphyrin derivative (C 72 H 54 N 4 O 4) suggests no classical hydrogen bonds between neighbor molecules. X-ray crystal structure shows that all benzyl units of this porphyrin have close C-H⋯π weak contacts with phenyl or porphyrinyl units forming a network of porphyrin rings. Also C-H⋯O and parallel aromatic-aromatic weak interactions play an important role in structure extension. All of these interactions control the crystal packing of molecules. X-ray diffraction was used to perform single crystal analysis. The structure was solved in the triclinic space group P-1, with unit cell parameters:

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