research centers


Search results: Found 3

Listing 1 - 3 of 3
Sort by

Article
Study of Interaction between Vitamin C and Nickel () Ion using a Polarographic Methods
دراسة التآثر بين فيتامين سي و آيون النيكل الثنائي باستخدام طرق البولاروغرافي

Authors: Elham Al Rufaie الهام الرفيعي --- Mohamed Abdel Kalik Hussain محمد عبد الخالق حسين*
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2014 Volume: 55 Issue: 3A Pages: 878-885
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

The Polarographic study of the interaction between ascorbic acid and Ni+2 was carried out at dropping mercury electrode [DME] . This study included the determination of the kinetic parameters (kfh ,n) and thermodynamic parameters such as enthalpy change (H), free energy change (G) and entropy change (S) of Ni+2 complexes with ascorbic acid in 0.1 M KCl solution over the temperature rang of (294-309)K. The electrode processes were irreversible and diffusion controlled.

استخدمت تقنية البولاروغراف النبضي المشتق وبولاروغراف التيار المباشر لدراسة التآثر بين ايون النيكل الثنائي وحامض الاسكوربيك باستخدام قطب الزئبق المتقاطر، واشتملت الدراسة تعيين الدوال الحركية (ثابت سرعة التآثر ومعامل الانتقال الكاثودي) وكذلك حساب الدوال الثرمودينامكية، الانثاليبي، وطاقة كيبز الحرة، والانتروبي لعملية التعقيد بين ايون النيكل وحامض الاسكوربيك في مدى من درجات الحرارة بين (294-309) كلفن وتبين ان عمليات القطب غير عكسية ومسيطر عليها بالانتشار.


Article
Incorporation of Ions into Giant Molybdenum-oxide Cluster as a General Phenomenon

Author: Al-Ameen Bariz Omarali
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 21 Issue: 3 Pages: 1-12
Publisher: Al-Nahrain University جامعة النهرين

Loading...
Loading...
Abstract

In spite of the integration and concomitant release of all 16 {Mo1} (necessary for ions Recently, the integration of different kinds of matter into giant wheel-shaped molybdenum-oxide clusters has been investigated with so-called chemical adaptability phenomenon. This refers to the integration of a large number of appropriate cations and anions even of the large “salt like” {M(SO4)}16 rings (M = K+ or NH4+) based on the cooperative/synergetic activation of silent receptor sites. An even more remarkable consequence of the flexibility behavior of the molecular giant wheel-shaped molybdenum-oxides of the type {Mo176} and {Mo154}: the possibility of the integration of Cu2+ as tetrahedrally coordinated divalent cations at the same wheel area. In this study and in order to make the phenomenon as a general, the incorporation of ions into giant molybdenum-oxide cluster was expanded to involve the integration of some other cations (Fe2+, Co2+, Ni2+ or Zn2+) or salt like ring{Tl(SO4)}16. Uptake and almost half of the 16 {Mo2} units the parent ring structure is maintained in the following resulting hybrids {(Mo146) (K(SO4))16} 1compound, {(Mo146) (NH4(SO4))16} 2 compound and {(Mo146) (Tl(SO4))16} 3. Moreover, the integrating of a tetrahedrally coordinated divalent cation like Fe2+, Co2+, Ni2+ or Zn2+ in addition to Cu2+, at the same wheel area (after releasing six {Mo2}-type building blocks of the parent wheel-shaped cluster) produced hybrid compounds with the general formula: [H4MIIn MoV28MoVI114O432(H2O)58]-26+2(n-5) (where MII= Fe2+, Co2+, Ni2+ or Cu2+, n=5, but with Zn2+, n=6) compounds (4–8). The result corresponds to the extreme flexibility of molybdenum-oxide building block linking resulting in the formation of a huge variety of structures from “molybdate” containing solutions (a unique molybdenum-oxide diversity phenomenon). The prepared compounds were characterized by CHN, Cit.Tit for the determination of the number of the MoV centers, spectroscopic methods (IR and UV-Vis) and X-ray crystallography (determination of the characteristic unit cell dimensions).


Article
Synthisis of Metal Complexes of Novel Heterocyclic Azo Dyes 1-nitro5-azo-(4N(2`,4`-dichloro-6-yl-δ-triazine)-anilino) acridine NADTAA and study Suggested Geometries

Authors: Nezar L. Shihab --- Intedhar K. M.
Journal: Misan Journal of Acodemic Studies مجلة ميسان للدراسات الاكاديمية ISSN: 1994697X Year: 2017 Volume: 16 Issue: 31 Pages: 12-30
Publisher: Misan University جامعة ميسان

Loading...
Loading...
Abstract

AbstractIn this work,we synthesized a new azo complexes dye by bringing together three important chemical compounds, Acridine, (2`,4`-dichloro-6-yl-δ -triazine)-anilino and metal(I ,II , III, IV). Complexes by using this dye. The chemical structures of both nitro5-azo-(4N(2`,4`-dichloro-6-yl-δ-triazine)-anilino)-acridine NADTAA and azo metal complexes were studied.The preparation and structural identification of novel(Ag+, Cr+2 , Pd+2 , Cu+2 , Co+2 Cd+2 , Ni+2 , Zn+2,Fe+3,Pd+4).Complexes of 1-nitro5-azo-(4N(2`,4`-dichloro-6-yl-δ-triazine)-anilino acridineNADTAA are studied on the basis of their spectroscopic data. Structural information has been taken from spectroscopic. It has been found that the azo ligand behaves as neutral bidentate (N,N) ligand forming chelates with 1:2 (metal:ligand) stoichiometry Tetra hydral environment is suggested for metal complexes .

الخلاصةفي هذا البحث تم تحضير صبغة ازوية معقدة جديددة مدب ستخدامدالا ة ةدة مر بدتي يةيتهيدة م ةدةالا ريددديب و 2 و 4 ةنددتهي ردد و – - 6 يدد دلاددت ترايددنيب انريندد والاي نددتي الةرنيددة الاوتديددة و – – – -الثنتهية والث ةية والرستعية . ومعقداي خرقت مدب هدذا الغدبغة ا تدم د اخدة الار يدل الييةيدتهي ليد مدب13الغبغة 1 نارو - 5 ازو – - 4 4 ةنتهي ر و – - 2( 4 6 ي دلات تراينيب انرين ا رايديب و – – – -معقدات ت مع الاي نتي الةرنية وتةت الد اخة ل ذا الةر بتي الةعقدة الةحضرة الجدسددة وتخميغد ت سدتل رال يةيدة لرةر دل 1 نادرو - 5 ازو – - 4 4 ةندتهي رد و – - 2( 4 6 يد دلادت ترايدنيب انريند – – – -ا رايديب و معقدات ت مع اي نتي الةضة + 1 واليرولا + 2 والب دي لا + 2 والنحتس + 2 والي سردت+ 2 واليتدمي لا + 2 والنييد + 2 والمت صديب + 2 والحديدد + 3 والب ديد لا + 4 . ومدب د اخدةالةعر متي ال يةية لقد وجدنت ان هذا الةر ل الرييندي الازوي ياغرف رييتيند ةندتهي الندب فردن كلييتينددسننبة 1ك 2 اي لييتيند يرياي مب خ لاي الناروجيب ومب هذا الننبة تم اقاراح ال يئة الةراغية ل ذا الةعقداي الاي ينية.

Listing 1 - 3 of 3
Sort by
Narrow your search

Resource type

article (3)


Language

English (3)


Year
From To Submit

2018 (1)

2017 (1)

2014 (1)