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1

New oxadiazole derivatives as promising electron transport materials: synthesis and characterization of thermal, optical and electrochemical properties

100%

Liu C., Zhao P., Huang W.

Open Chemistry

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2007

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vol. 5

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issue 1

303-315

EN

2,5-bis-(4-biphenyl)-yl-1,3,4-oxadiazole (1a), 2,5-bis-(4-(6,8-difluoro)-biphenyl)-yl-1,3,4-oxadiazole (1b) and 2,5-bis-(4-(spiro-fluorenyl)-phenyl)-yl-1,3,4-oxadiazole (1c) were designed, synthesized and characterized. 1a–c were easily obtained from Suzuki reactions between 2,5-bis-(4-bromo-phynyl)-[1,3,4]oxadiazole (2) and aromatic boronic acids (3). They were characterized by 1H-NMR, DSC, TGA, UV-Vis, photoluminescence (PL) spectrometry and CV. The melting temperatures (T m) of 1a–c are 237, 208 and 370 °C, respectively, much higher than that of 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole (PBD, T m = 136 °C). The oxidation potentials of 1a–c are 1.86, 1.94 and 1.18 V, and their reduction potentials are −2.31, −2.22 and −2.27 V, respectively, indicating that the introduction of electronegative oxadiazole unit lowers the electron density in molecules and enhances their stabilities. The LUMO/HOMO energy levels of 1a–c are as low as −2.39/−6.56, −2.48/−6.69 and −2.43/−5.88 eV, respectively. The good thermal stabilities and low orbital levels of 1a–c make them promising electron-transporting or hole-blocking materials for organic optoelectronic devices.

2

Effects of mismatches and insertions on discrimination accuracy of nucleic acid probes

100%

Piao X., Sun L., Zhang T., Gan Y., Guan Y.

Acta Biochimica Polonica

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2008

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vol. 55

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issue 4

713-720

EN

Effective discrimination of non-complementary nucleotides is an important factor to ensure the accuracy of hybridization-based nucleic acid analyses. The current study investigates the effects of the chemical nature, the positions, the numbers, and the cooperative behavior of mismatches as well as insertions on 20-mer and 30-mer duplexes. We observed the hybridization stability trend affected by mismatches: G:T ≈ G:G > G:A > A:A ≈ T:T > A:C ≈ T:C > C:C. The experimental data show that mismatches at the center of the oligonucleotide probes have a more profound destabilizing effect on the hybridization stability than those at either ends. Insertions also demonstrate a similar destabilizing effect as mismatches. These results provide useful information for designing DNA microarray nucleotide probes and for improving the discrimination accuracy of hybridization-based detections.

3

Comparison of Cupola Furnace and Blast Furnace Slags with Respect to Possibilities of Their Utilization

75%

Pribulová A., Futáš P., Petrík J., Pokusová M., Brzeziński M., Jakubski J.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 4

4

Thermodynamic model of crystallization and melting of small particles

51%

Samsonov V., Malkov O.

Open Physics

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2004

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vol. 2

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issue 1

90-103

EN

The size dependence of the nanocrystal melting temperature has been investigated based on a nonequilibrium thermodynamics approach. An expression has been derived for the melting temperature that, contrary to the classical Tomson formula, takes into account the metastable character of the crystal nucleus-melt shell equilibrium. Quantitative estimations have been carried out for small spherical particles of aluminum, tin, and lead.

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1 Acta Biochimica Polonica

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1 Open Chemistry

1 Open Physics

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1 Gan Y.

1 Guan Y.

1 Huang W.

1 Jakubski J.

1 Liu C.

1 Malkov O.

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1 Piao X.

1 Pokusová M.

1 Pribulová A.

1 Samsonov V.

1 Sun L.

1 Zhang T.

1 Zhao P.

New oxadiazole derivatives as promising electron transport materials: synthesis and characterization of thermal, optical and electrochemical properties

Effects of mismatches and insertions on discrimination accuracy of nucleic acid probes

Comparison of Cupola Furnace and Blast Furnace Slags with Respect to Possibilities of Their Utilization

Thermodynamic model of crystallization and melting of small particles