2026-09-24T11:23:05Zhttps://univendspace.univen.ac.za/server/oai/requestoai:univendspace.univen.ac.za:11602/17542024-09-10T14:23:25Zcom_11602_1924com_11602_1914com_11602_1897com_11602_737col_11602_2142col_11602_738
Batisai, Eustina
Oliver, Clive
Mahwasane, Rolivhuwa
2021
2021-11-22T13:12:37Z
2021-11-22T13:12:37Z
2021-04
Mahwasane, Rolivhuwa (2021) Synthesis of mixes ligand metal-organic frameworks for sorption studies. University of Venda, South Africa.<http://hdl.handle.net/11602/1754>.
http://hdl.handle.net/11602/1754
Mahwasane R. Synthesis of mixes ligand metal-organic frameworks for sorption studies. []. , 2021 [cited yyyy month dd]. Available from: http://hdl.handle.net/11602/1754
Mahwasane, R. (2021). <i>Synthesis of mixes ligand metal-organic frameworks for sorption studies</i>. (). . Retrieved from http://hdl.handle.net/11602/1754
Mahwasane, Rolivhuwa. <i>"Synthesis of mixes ligand metal-organic frameworks for sorption studies."</i> ., , 2021. http://hdl.handle.net/11602/1754
TY - Dissertation
AU - Mahwasane, Rolivhuwa
AB - Metal-organic frameworks (MOFs) are a class of crystal engineered materials consisting of organic and inorganic units. They are made up of metal ions connected by bridging ligands to form three dimensional (3D) networks. MOFs have attracted widespread interest owing to their diverse applications in gas storage and separation, luminescence, catalysis, non-linear optics as well as magnetism. The first part of this study describes the synthesis and characterisation of five pyridyl N-donor diimide ligands namely; N,N-bis(pyridin-3-ylmethyl)naphthalene diimide (L1), N,N-bis(pyridin-4-ylmethyl) naphthalene diimide (L2), 2,2-bis(pyridin-2-ylmethyl)-[5,5-biisoindoline]-1,1-3,3-tetraone (L3), 2,2-bis(pyridin-4-ylmethyl)-[5,5-biisoindoline]-1,1-3,3-tetraone (L4) and 5,5-carbonylbis(2-(pyridin-3-ylmethyl) isoindoline-1,3-dione) (L5). The second part of this study describes the synthesis of seven (7) new MOFs namely; {[Zn(DCT)(L1)0.5]·(DMF)}n (RMMOF 1), {[Zn(DCT)(L2)0.5]·(DMF)·(H2O)}n (RMMOF 2), {[Co(DCT)(L2)0.5]·(DMF)}n (RMMOF 3), {[Zn5(OBZ)3(DMF)2]·(DMF)4}n (RMMOF 4), {[Cd(NDC)(L4)2]·(DMF)3}n (RMMOF 5), {[Zn0.5(NDC)0.5(L4)0.5]·(DMF)2}n (RMMOF 6) and {[Cu(NDC)(L5)0.5](DMF)3}n (RMMOF 7). The MOFs were synthesized from the reactions of the pyridyl N-donor diimide ligands, carboxylate O-donor co-ligands (6,6-dithiodinicotinic acid (DCT), 4,4-oxybis benzoic acid (OBZ) and 2,6-naphthalene dicarboxylic acid (NDC)) and transition metal salts. The MOFs were characterized using single crystal X-ray diffraction (SCXRD), thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD) and Brunauer-Emmet-Teller (BET). SCXRD revealed that the MOFs are three dimensional and possess voids that are occupied by solvent molecules. The nature of the voids as well as the void volumes were determined using the Mercury program. RMMOF 7 possesses the largest void space (~33%) compared to the other MOFs. The sorption capacities were determined for RMMOF 4, RMMOF 5, RMMOF 6 and RMMOF 7 using carbon dioxide gas at 195 K and 273 K. RMMOF 7 adsorbs the largest amount of CO2 at 195 K compared to the other MOFs.
DA - 2021-04
DB - ResearchSpace
DP - Univen
KW - Synthesis
KW - Mixes ligand metal
KW - Organic frameworks
KW - Sorption studies
LK - https://univendspace.univen.ac.za
PY - 2021
T1 - Synthesis of mixes ligand metal-organic frameworks for sorption studies
TI - Synthesis of mixes ligand metal-organic frameworks for sorption studies
UR - http://hdl.handle.net/11602/1754
ER -
MSc (Chemistry)
Metal-organic frameworks (MOFs) are a class of crystal engineered materials consisting of organic and inorganic units. They are made up of metal ions connected by bridging ligands to form three dimensional (3D) networks. MOFs have attracted widespread interest owing to their diverse applications in gas storage and separation, luminescence, catalysis, non-linear optics as well as magnetism. The first part of this study describes the synthesis and characterisation of five pyridyl N-donor diimide ligands namely; N,N-bis(pyridin-3-ylmethyl)naphthalene diimide (L1), N,N-bis(pyridin-4-ylmethyl) naphthalene diimide (L2), 2,2-bis(pyridin-2-ylmethyl)-[5,5-biisoindoline]-1,1-3,3-tetraone (L3), 2,2-bis(pyridin-4-ylmethyl)-[5,5-biisoindoline]-1,1-3,3-tetraone (L4) and 5,5-carbonylbis(2-(pyridin-3-ylmethyl) isoindoline-1,3-dione) (L5). The second part of this study describes the synthesis of seven (7) new MOFs namely; {[Zn(DCT)(L1)0.5]·(DMF)}n (RMMOF 1), {[Zn(DCT)(L2)0.5]·(DMF)·(H2O)}n (RMMOF 2), {[Co(DCT)(L2)0.5]·(DMF)}n (RMMOF 3), {[Zn5(OBZ)3(DMF)2]·(DMF)4}n (RMMOF 4), {[Cd(NDC)(L4)2]·(DMF)3}n (RMMOF 5), {[Zn0.5(NDC)0.5(L4)0.5]·(DMF)2}n (RMMOF 6) and {[Cu(NDC)(L5)0.5](DMF)3}n (RMMOF 7). The MOFs were synthesized from the reactions of the pyridyl N-donor diimide ligands, carboxylate O-donor co-ligands (6,6-dithiodinicotinic acid (DCT), 4,4-oxybis benzoic acid (OBZ) and 2,6-naphthalene dicarboxylic acid (NDC)) and transition metal salts. The MOFs were characterized using single crystal X-ray diffraction (SCXRD), thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD) and Brunauer-Emmet-Teller (BET). SCXRD revealed that the MOFs are three dimensional and possess voids that are occupied by solvent molecules. The nature of the voids as well as the void volumes were determined using the Mercury program. RMMOF 7 possesses the largest void space (~33%) compared to the other MOFs. The sorption capacities were determined for RMMOF 4, RMMOF 5, RMMOF 6 and RMMOF 7 using carbon dioxide gas at 195 K and 273 K. RMMOF 7 adsorbs the largest amount of CO2 at 195 K compared to the other MOFs.
NRF
1 online resource (xii, 71 leaves) : color illustrations
en
University of Venda
Synthesis
UCTD
Mixes ligand metal
Organic frameworks
Sorption studies
541.2242
Oligand
Coordination compounds
Crown ethers
Metal ions
Synthesis of mixes ligand metal-organic frameworks for sorption studies
Dissertation
open.access