•  Persian
    • Persian
    • English
  •   ورود
  • دانشگاه فردوسی مشهد
  • |
  • مرکز اطلاع‌رسانی و کتابخانه مرکزی
    • Persian
    • English
  • خانه
  • انواع منابع
    • مقاله مجله
    • کتاب الکترونیکی
    • مقاله همایش
    • استاندارد
    • پروتکل
    • پایان‌نامه
  • راهنمای استفاده
View Item 
  •   کتابخانه دیجیتال دانشگاه فردوسی مشهد
  • Fum
  • Articles
  • ProfDoc
  • View Item
  •   کتابخانه دیجیتال دانشگاه فردوسی مشهد
  • Fum
  • Articles
  • ProfDoc
  • View Item
  • همه
  • عنوان
  • نویسنده
  • سال
  • ناشر
  • موضوع
  • عنوان ناشر
  • ISSN
  • شناسه الکترونیک
  • شابک
جستجوی پیشرفته
JavaScript is disabled for your browser. Some features of this site may not work without it.

Complexation Ability of Dibenzo-24-crown-8 with Cs+ Cation in Binary Mixed Non-Aqueous Solvents

نویسنده:
غلامحسین رونقی
,
M. Mohajeri
,
سمیه ترحمی
,
Glamhossein Ronagi
,
somayeh tarahomi
سال
: 2009
چکیده: The complexation reaction of macrocyclic ligand, dibenzo-24-crown-8 (DB24C8) with Cs+ cation was studied in acetonitrile-methanol(AN-MeOH), acetonitrile-ethanol (AN-EtOH), acetonitrile-dimethylformamide(AN-DMF) and nitromethane-methanol (NM-MeOH) binary

mixtures at different temperatures using the conductometric method.

The conductance data show that in all the solvent systems, the stoichiometry

of the complex formed between DB24C8 and Cs+ cation is 1:1(ML). It was found that the stability of (DB24C8.Cs)+ complex decreases with increasing temperature. The stability constant of the resulting 1:1complex in pure non-aqueous solvents decreases in the order: EtOH >MeOH > DMF and in binary mixed solutions, it follows the order: ANEtOH> AN-MeOH > AN-DMF. A non-linear behaviour was observed for changes of log Kf of (DB24C8.Cs)+ complex versus the composition of the binary mixed solvents. The obtained results show that the stability of the complex is quite sensitive to the composition of the mixed solvents.The values of thermodynamic quantities (DHºc and DSºc) for formation of (DB24C8.Cs)+ complex were obtained from temperature dependence of the stability constant using the van\\'t Hoff plots. The results show that in all cases the complex is enthalpy stabilized but, in most cases entropy destabilized and both parameters are affected by the nature and composition of the mixed solvents.
یو آر آی: https://libsearch.um.ac.ir:443/fum/handle/fum/3381022
کلیدواژه(گان): Dibenzo-24-crown-8,Cs+,Conductometry,Acetonitrilemethanol,Acetonitrile-ethanol,Acetonitrile-dimethylformamide,Nitromethane-methanol
کالکشن :
  • ProfDoc
  • نمایش متادیتا پنهان کردن متادیتا
  • آمار بازدید

    Complexation Ability of Dibenzo-24-crown-8 with Cs+ Cation in Binary Mixed Non-Aqueous Solvents

Show full item record

contributor authorغلامحسین رونقیen
contributor authorM. Mohajerien
contributor authorسمیه ترحمیen
contributor authorGlamhossein Ronagifa
contributor authorsomayeh tarahomifa
date accessioned2020-06-06T14:04:03Z
date available2020-06-06T14:04:03Z
date issued2009
identifier urihttps://libsearch.um.ac.ir:443/fum/handle/fum/3381022
description abstractThe complexation reaction of macrocyclic ligand, dibenzo-24-crown-8 (DB24C8) with Cs+ cation was studied in acetonitrile-methanol(AN-MeOH), acetonitrile-ethanol (AN-EtOH), acetonitrile-dimethylformamide(AN-DMF) and nitromethane-methanol (NM-MeOH) binary

mixtures at different temperatures using the conductometric method.

The conductance data show that in all the solvent systems, the stoichiometry

of the complex formed between DB24C8 and Cs+ cation is 1:1(ML). It was found that the stability of (DB24C8.Cs)+ complex decreases with increasing temperature. The stability constant of the resulting 1:1complex in pure non-aqueous solvents decreases in the order: EtOH >MeOH > DMF and in binary mixed solutions, it follows the order: ANEtOH> AN-MeOH > AN-DMF. A non-linear behaviour was observed for changes of log Kf of (DB24C8.Cs)+ complex versus the composition of the binary mixed solvents. The obtained results show that the stability of the complex is quite sensitive to the composition of the mixed solvents.The values of thermodynamic quantities (DHºc and DSºc) for formation of (DB24C8.Cs)+ complex were obtained from temperature dependence of the stability constant using the van\\'t Hoff plots. The results show that in all cases the complex is enthalpy stabilized but, in most cases entropy destabilized and both parameters are affected by the nature and composition of the mixed solvents.
en
languageEnglish
titleComplexation Ability of Dibenzo-24-crown-8 with Cs+ Cation in Binary Mixed Non-Aqueous Solventsen
typeJournal Paper
contenttypeExternal Fulltext
subject keywordsDibenzo-24-crown-8en
subject keywordsCs+en
subject keywordsConductometryen
subject keywordsAcetonitrilemethanolen
subject keywordsAcetonitrile-ethanolen
subject keywordsAcetonitrile-dimethylformamideen
subject keywordsNitromethane-methanolen
journal titleAsian Journal of Chemistryen
journal titleAsian Journal of Chemistryfa
pages4861-4870
journal volume21
journal issue6
identifier linkhttps://profdoc.um.ac.ir/paper-abstract-1011691.html
identifier articleid1011691
  • درباره ما
نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
DSpace software copyright © 2019-2022  DuraSpace