双六氟乙酰丙酮钯的低温热力学性质

IF 0.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Russian Journal of Physical Chemistry A Pub Date : 2024-09-09 DOI:10.1134/s0036024424701012

M. A. Bespyatov, T. M. Kuzin, D. S. Shevelev, N. V. Gelfond

{"title":"双六氟乙酰丙酮钯的低温热力学性质","authors":"M. A. Bespyatov, T. M. Kuzin, D. S. Shevelev, N. V. Gelfond","doi":"10.1134/s0036024424701012","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The heat capacity of palladium bis-hexafluoroacetylacetonate (Pd(C5HF6O2)2; CAS no. 64916-48-9) is measured adiabatically in the range of 6.088–307.596 K. The obtained data are used to calculate thermodynamic functions (entropy, increment of enthalpy, reduced Gibbs energy) in the range of 0–310 K. The functional behavior of the heat capacity exhibits an anomaly in the range of 145–285 K. The anomaly has a maximum at a temperature of T ≈ 225 K, indicating a second-order phase transition in this range of temperatures. Anomalous contributions to entropy and enthalpy are calculated.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Low-Temperature Thermodynamic Properties of Palladium Bis-hexafluoroacetylacetonate\",\"authors\":\"M. A. Bespyatov, T. M. Kuzin, D. S. Shevelev, N. V. Gelfond\",\"doi\":\"10.1134/s0036024424701012\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Abstract</h3>The heat capacity of palladium bis-hexafluoroacetylacetonate (Pd(C5HF6O2)2; CAS no. 64916-48-9) is measured adiabatically in the range of 6.088–307.596 K. The obtained data are used to calculate thermodynamic functions (entropy, increment of enthalpy, reduced Gibbs energy) in the range of 0–310 K. The functional behavior of the heat capacity exhibits an anomaly in the range of 145–285 K. The anomaly has a maximum at a temperature of T ≈ 225 K, indicating a second-order phase transition in this range of temperatures. Anomalous contributions to entropy and enthalpy are calculated.\",\"PeriodicalId\":767,\"journal\":{\"name\":\"Russian Journal of Physical Chemistry A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Physical Chemistry A\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1134/s0036024424701012\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry A","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1134/s0036024424701012","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

摘要

摘要在6.088-307.596 K范围内对双六氟乙酰丙酮酸钯（Pd(C5HF6O2)2；化学文摘社编号：64916-48-9）的热容量进行了绝热测量。热容量的函数行为在 145-285 K 范围内表现出异常。异常值在温度 T≈225 K 时达到最大，表明在此温度范围内存在二阶相变。计算了熵和焓的异常贡献。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Low-Temperature Thermodynamic Properties of Palladium Bis-hexafluoroacetylacetonate

查看原文本刊更多论文

Low-Temperature Thermodynamic Properties of Palladium Bis-hexafluoroacetylacetonate

Abstract

The heat capacity of palladium bis-hexafluoroacetylacetonate (Pd(C₅HF₆O₂)₂; CAS no. 64916-48-9) is measured adiabatically in the range of 6.088–307.596 K. The obtained data are used to calculate thermodynamic functions (entropy, increment of enthalpy, reduced Gibbs energy) in the range of 0–310 K. The functional behavior of the heat capacity exhibits an anomaly in the range of 145–285 K. The anomaly has a maximum at a temperature of T ≈ 225 K, indicating a second-order phase transition in this range of temperatures. Anomalous contributions to entropy and enthalpy are calculated.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Russian Journal of Physical Chemistry A 化学-物理化学

CiteScore

1.20

自引率

14.30%

发文量

376

审稿时长

5.1 months

期刊介绍： Russian Journal of Physical Chemistry A. Focus on Chemistry (Zhurnal Fizicheskoi Khimii), founded in 1930, offers a comprehensive review of theoretical and experimental research from the Russian Academy of Sciences, leading research and academic centers from Russia and from all over the world. Articles are devoted to chemical thermodynamics and thermochemistry, biophysical chemistry, photochemistry and magnetochemistry, materials structure, quantum chemistry, physical chemistry of nanomaterials and solutions, surface phenomena and adsorption, and methods and techniques of physicochemical studies.