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Thermodynamic properties of second generation poly(phenylene-pyridyl) dendrimer

  • Chemical Thermodynamics and Thermochemistry
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Abstract

The temperature dependence of heat capacity C o p = f (T) of second generation hard poly(phenylene-pyridyl) dendrimer (G2-24Py) was measured by a adiabatic vacuum calorimeter over the temperature range 6–320 K for the first time. The experimental results were used to calculate the standard thermodynamic functions: heat capacity C o p (T), enthalpy H o(T)–H o(0), entropy S o(T)–S o(0) and Gibbs function G o(T)–H o(0) over the range from T → 0 K to 320 K. The standard entropy of formation at T = 298.15 K of G2-24Py was calculated. The low-temperature heat capacity was analyzed based on Debye’s heat capacity theory of solids. Fractal treatment of the heat capacity was performed and the values of the temperature characteristics and fractal dimension D were determined. Some conclusions regarding structure topology are given.

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Authors and Affiliations

  1. Institute of Chemistry, Nizhny Novgorod State University, pr. Gagarina 23/5, Nizhny Novgorod, 603950, Russia

    N. N. Smirnova, A. V. Markin & Yu. A. Zakharova

  2. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russia

    N. V. Kuchkina, A. L. Rusanov & Z. B. Shifrina

Authors
  1. N. N. Smirnova
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  2. A. V. Markin
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  3. Yu. A. Zakharova
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  4. N. V. Kuchkina
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  5. A. L. Rusanov
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  6. Z. B. Shifrina
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Correspondence to N. N. Smirnova.

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Original Russian Text © N.N. Smirnova, A.V. Markin, Yu.A. Zakharova, N.V. Kuchkina, A.L. Rusanov, Z.B. Shifrina, 2010, published in Zhurnal Fizicheskoi Khimii, 2010, Vol. 84, No. 4, pp. 628–633.

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Smirnova, N.N., Markin, A.V., Zakharova, Y.A. et al. Thermodynamic properties of second generation poly(phenylene-pyridyl) dendrimer. Russ. J. Phys. Chem. 84, 548–553 (2010). https://doi.org/10.1134/S0036024410040059

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  • DOI: https://doi.org/10.1134/S0036024410040059

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