Synthesis and characterisation of [CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat
This research project is focused on the synthesis and characterization of copper(II) mixed carboxylates of general formula, [Cu2(RCOO)n(R’COO)4-n)], where R = p-H2NC6H4, R’ = CH3(CH2)14, and n = 1–3. These mixed carboxylates were specially designed to be low-temperature and thermally stable magnetic...
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my.um.stud.37522013-09-19T09:36:30Z Synthesis and characterisation of [CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat Ahmad Nazeer, Che Mat QD Chemistry This research project is focused on the synthesis and characterization of copper(II) mixed carboxylates of general formula, [Cu2(RCOO)n(R’COO)4-n)], where R = p-H2NC6H4, R’ = CH3(CH2)14, and n = 1–3. These mixed carboxylates were specially designed to be low-temperature and thermally stable magnetic and redox-active metallomesogens. A total of six binuclear copper(II) mixed-carboxylates were successfully prepared by the one-pot reaction, and their thermal, metallomesogenic, magnetic and redox properties reported. The instrumental analyses used to characterize these complexes were CHN elemental analyses, FTIR and UV-vis spectroscopies, molar conductivity, thermogravimetry, differential scanning calorimetry, optical polarized microscopy, magnetic susceptibility by the Gouy method, and cyclic voltammetry. All complexes, except for [Cu2(p-H3NC6H4COO)3Cl]Cl3.NH3.3H2O (Complex 4), were non-electrolytes. Complex 4 was a 1:1 electrolyte. Their geometry was square-pyramidal involving syn-syn or syn-anti bridging and/or chelating carboxylates, their thermal stabilities were higher than 200oC, and the melting point ranges from about 118oC, except for Complex 6 which melted at a higher temperature of 166oC. The complex exhibiting thermotropic metallomesogenic properties was [Cu2(p-H2NC6H4COO)2(CH3(CH2)14COO)2(H2O)(CH3CH2OH)] (Complex 1) with smectic C mesophase. They were either antiferromagnet or ferromagnet, with μeff and 2J values from 2.11 to 3.72 B.M. and from -200 to 109 cm-1, iii respectively. All complexes were redox active. The redox reactions were quasi-reversible involving extensive structural reorganization and chemical reactions (the EC mechanism). 2011 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/3752/1/FIRST_COVER_(INSIDE).pdf application/pdf http://studentsrepo.um.edu.my/3752/2/FRONT_COVER_(RED_HARD_COVER).pdf application/pdf http://studentsrepo.um.edu.my/3752/3/Acknowledge%2C_Abstract%2C_Abstrak_%26_Content.pdf application/pdf http://studentsrepo.um.edu.my/3752/4/CHAPTER_1_INTRODUCTION.pdf application/pdf http://studentsrepo.um.edu.my/3752/5/CHAPTER_2_THEORY_AND_REVIEW_150411.pdf application/pdf http://studentsrepo.um.edu.my/3752/6/CHAPTER_3_EXPERIMENTAL_nazeer.pdf application/pdf http://studentsrepo.um.edu.my/3752/7/CHAPTER_4_RESULTS_AND_DISCUSSIONS.pdf application/pdf http://studentsrepo.um.edu.my/3752/8/CHAPTER_5_CONCLUSION.pdf application/pdf http://studentsrepo.um.edu.my/3752/9/APPENDIX_1.pdf application/pdf http://studentsrepo.um.edu.my/3752/10/APPENDIX_2.pdf http://pendeta.um.edu.my/client/default/search/results?qu=Synthesis+and+characterisation+of+%5BCU2%28P-H2NC6H4COO%29N%28Rcoo%294-N%5D+as+low+temperature+functional+metallomesogens&te= Ahmad Nazeer, Che Mat (2011) Synthesis and characterisation of [CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/3752/ |
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QD Chemistry Ahmad Nazeer, Che Mat Synthesis and characterisation of [CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat |
description |
This research project is focused on the synthesis and characterization of copper(II) mixed carboxylates of general formula, [Cu2(RCOO)n(R’COO)4-n)], where R = p-H2NC6H4, R’ = CH3(CH2)14, and n = 1–3. These mixed carboxylates were specially designed to be low-temperature and thermally stable magnetic and redox-active metallomesogens.
A total of six binuclear copper(II) mixed-carboxylates were successfully prepared by the one-pot reaction, and their thermal, metallomesogenic, magnetic and redox properties reported. The instrumental analyses used to characterize these complexes were CHN elemental analyses, FTIR and UV-vis spectroscopies, molar conductivity, thermogravimetry, differential scanning calorimetry, optical polarized microscopy, magnetic susceptibility by the Gouy method, and cyclic voltammetry.
All complexes, except for [Cu2(p-H3NC6H4COO)3Cl]Cl3.NH3.3H2O (Complex 4), were non-electrolytes. Complex 4 was a 1:1 electrolyte. Their geometry was square-pyramidal involving syn-syn or syn-anti bridging and/or chelating carboxylates, their thermal stabilities were higher than 200oC, and the melting point ranges from about 118oC, except for Complex 6 which melted at a higher temperature of 166oC.
The complex exhibiting thermotropic metallomesogenic properties was [Cu2(p-H2NC6H4COO)2(CH3(CH2)14COO)2(H2O)(CH3CH2OH)] (Complex 1) with smectic C mesophase. They were either antiferromagnet or ferromagnet, with μeff and 2J values from 2.11 to 3.72 B.M. and from -200 to 109 cm-1,
iii
respectively. All complexes were redox active. The redox reactions were quasi-reversible involving extensive structural reorganization and chemical reactions (the EC mechanism). |
format |
Thesis |
author |
Ahmad Nazeer, Che Mat |
author_facet |
Ahmad Nazeer, Che Mat |
author_sort |
Ahmad Nazeer, Che Mat |
title |
Synthesis and characterisation of
[CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat
|
title_short |
Synthesis and characterisation of
[CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat
|
title_full |
Synthesis and characterisation of
[CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat
|
title_fullStr |
Synthesis and characterisation of
[CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat
|
title_full_unstemmed |
Synthesis and characterisation of
[CU2(P-H2NC6H4COO)N(Rcoo)4-N] as low temperature functional metallomesogens / Ahmad Nazeer bin Che Mat
|
title_sort |
synthesis and characterisation of
[cu2(p-h2nc6h4coo)n(rcoo)4-n] as low temperature functional metallomesogens / ahmad nazeer bin che mat |
publishDate |
2011 |
url |
http://studentsrepo.um.edu.my/3752/1/FIRST_COVER_(INSIDE).pdf http://studentsrepo.um.edu.my/3752/2/FRONT_COVER_(RED_HARD_COVER).pdf http://studentsrepo.um.edu.my/3752/3/Acknowledge%2C_Abstract%2C_Abstrak_%26_Content.pdf http://studentsrepo.um.edu.my/3752/4/CHAPTER_1_INTRODUCTION.pdf http://studentsrepo.um.edu.my/3752/5/CHAPTER_2_THEORY_AND_REVIEW_150411.pdf http://studentsrepo.um.edu.my/3752/6/CHAPTER_3_EXPERIMENTAL_nazeer.pdf http://studentsrepo.um.edu.my/3752/7/CHAPTER_4_RESULTS_AND_DISCUSSIONS.pdf http://studentsrepo.um.edu.my/3752/8/CHAPTER_5_CONCLUSION.pdf http://studentsrepo.um.edu.my/3752/9/APPENDIX_1.pdf http://studentsrepo.um.edu.my/3752/10/APPENDIX_2.pdf http://pendeta.um.edu.my/client/default/search/results?qu=Synthesis+and+characterisation+of+%5BCU2%28P-H2NC6H4COO%29N%28Rcoo%294-N%5D+as+low+temperature+functional+metallomesogens&te= http://studentsrepo.um.edu.my/3752/ |
_version_ |
1738505602214133760 |
score |
13.209306 |