Author
Natalia N. Smirnova
Bio: Natalia N. Smirnova is an academic researcher from N. I. Lobachevsky State University of Nizhny Novgorod. The author has contributed to research in topics: Heat capacity & Enthalpy. The author has an hindex of 10, co-authored 57 publications receiving 328 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the work temperature dependences of heat capacity of carbosilane dendrimers with butyl terminal groups of the third and the fourth generations as well as of the fifth and the sixth generations have been determined first in the range from 6 to 340 K and between 6 and 600 K, respectively, by precision adiabatic vacuum and dynamic calorimetry.
40 citations
TL;DR: In this article, two redox-isomeric (valence tautomeric) complexes (2,2′-bpy)Co(3,6-DBSQ)2 (1) and (1,10-phen) Co(3-6- DBSQ2 (2) reveal phase transitions that accompany interconversions of semiquinone-catecholato isomer into a bis-(semiquinonato) one.
Abstract: Two redox-isomeric (valence tautomeric) complexes (2,2′-bpy)Co(3,6-DBSQ)2 (1) and (1,10-phen)Co(3,6-DBSQ)2 (2) (where 2,2′-bpy = 2,2′-dipyridine; 1,10-phen = 1,10-phenanthroline; 3,6-DBSQ = 3,6-di-tert-butyl-benzosemiquinone-1,2) reveal phase transitions that accompany redox-isomeric interconversions of semiquinone–catecholato isomer into a bis-(semiquinonato) one. Phase transitions differ one from another by thermodynamic parameters (transition temperature and interval, enthalpy, and entropy). Complexes 1 and 2 have the same crystal system and space group, and they form solid solutions with any molar ratio. The number of solid solutions with the molar ratios of 2:1, 1:1, 1:2, 1:4, 1:8, and 1:16 of 1 per 2, respectively, were obtained. Product with 1:1 ratio was studied by precise calorimetry, by variable-temperature magnetic susceptibility, and by X-ray structural analysis. All solid solutions were investigated by means of differential scanning calorimetry. Each solid solution possesses phase transition ...
20 citations
TL;DR: In this article, the heat capacity of triphenylantimony dimethacrylate Ph3Sb(O2CCMe═CH2)2 was measured by precision adiabatic vacuum calorimetry over the temperature range from T = (6 to 335) K and by differential scanning over a range from (300 to 470) K. The melting of the sample was observed within the above temperature range.
Abstract: Heat capacities of triphenylantimony dimethacrylate Ph3Sb(O2CCMe═CH2)2 were measured by precision adiabatic vacuum calorimetry over the temperature range from T = (6 to 335) K and by differential scanning calorimetry over the temperature range from T = (300 to 470) K. The melting of the sample was observed within the above temperature range. The melting was accompanied by a compound decomposition. On the obtained data, the standard thermodynamic functions of molar heat capacity Cp,mo, enthalpy Ho(T) – Ho(0), entropy So(T), and Gibbs energy Go(T) – Ho(0) of Ph3Sb(O2CCMe═CH2)2 were calculated over the range from T = (0 to 400) K. The low-temperature (T < 50 K) heat capacity dependence was analyzed on the basis of Debye's heat capacity theory of solids and its multifractal model, so the characteristic temperatures and the fractal dimension were determined, and some conclusions about the structure topology were made. The standard entropy of formation at T = 298.15 K of Ph3Sb(O2CCMe═CH2)2(cr) was calculated.
19 citations
TL;DR: In this paper, the temperature dependence of the heat capacity C p,m ∘ = f (T ) of pentaphenylantimony Ph5Sb has been measured between T 6 and 350 k in the precision adiabatic vacuum calorimeter and from T 6 to 415k in the differential scanning calorimeters and reported for the first time.
19 citations
TL;DR: In this article, the heat capacity measurements of the crystalline phosphate CsMgPO4 of a tridymite structure were performed between T ǫ 7 and 650 k.
16 citations
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TL;DR: This review mainly covers 1 → 2 branched non-chiral dendrimers prepared by a divergent process but selected chiral surfaces are considered as well as metal encapsulation and a few hyperbranched routes to related imperfect d endrimers.
373 citations
TL;DR: A compendium of phase change enthalpies including fusion, vaporization, and sublimation was published in 2010 as mentioned in this paper, which included organic, organometallic, and a few inorganic compounds.
Abstract: A compendium of phase change enthalpies published in 2010 is updated to include the period 1880–2015. Phase change enthalpies including fusion, vaporization, and sublimation enthalpies are included for organic, organometallic, and a few inorganic compounds. Part 1 of this compendium includes organic compounds from C1 to C10. Part 2 of this compendium, to be published separately, will include organic and organometallic compounds from C11 to C192. Sufficient data are presently available to permit thermodynamic cycles to be constructed as an independent means of evaluating the reliability of the data. Temperature adjustments of phase change enthalpies from the temperature of measurement to the standard reference temperature, T = 298.15 K, and a protocol for doing so are briefly discussed.
191 citations
TL;DR: A collection of phase change enthalpies of organic molecules including fusion, vaporization, and sublimation enthalphies for organometallic, ionic liquids, and a few inorganic compounds can be found in this paper.
Abstract: The second part of this compendium concludes with a collection of phase change enthalpies of organic molecules inclusive of C11–C192 reported over the period 1880–2015. Also included are phase change enthalpies including fusion, vaporization, and sublimation enthalpies for organometallic, ionic liquids, and a few inorganic compounds. Paper I of this compendium, published separately, includes organic compounds from C1 to C10 and describes a group additivity method for evaluating solid, liquid, and gas phase heat capacities as well as temperature adjustments of phase changes. Paper II of this compendium also includes an updated version of a group additivity method for evaluating total phase change entropies which together with the fusion temperature can be useful in estimating total phase change enthalpies. Other uses include application in identifying potential substances that either form liquid or plastic crystals or exhibit additional phase changes such as undetected solid–solid transitions or behave ani...
107 citations
TL;DR: The publisher or other rights-holder may allow further reproduction and re-use of this version refer to the White Rose Research Online record for this item.
Abstract: eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher’s website.
103 citations
TL;DR: The first multiplication atom-bond connectivity index of several common drugs structure are studied, and the accurate expressions are determined, and theoretical conclusions provide practical guiding significance for pharmaceutical engineering.
Abstract: In the field of medicine, there are a large number of new drugs synthesis every year. Before entering the clinical stage, it needs a lot of work on drug testing of the various properties. Due to the lack of a large number of laboratory technician, laboratory equipment and reagents, the drug testing of many biochemical properties are not completed. Theoretical medicine provides a theoretical way for medical researchers to obtain the pharmaceutical properties of compounds by calculation tricks. In this paper, the first multiplication atom-bond connectivity index of several common drugs structure are studied, and the accurate expressions are determined. These theoretical conclusions provide practical guiding significance for pharmaceutical engineering.
100 citations