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61
Synthesis and structural studies of some metal complexes of tetraaza macrocyclic ligands
Published 1993“…A series of dibenzo macrocyclic tetraamine ligands with 14-, 15-, 16-, 17- and 19-membered inner great lings (L14 to L15) has been synthesized to investigate the effect of ring size variation on their complexation behaviour with the metal-ions, Ni(Il), Zn(ll) and Cd(II).…”
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Thesis -
62
Untitled (Publicity notice board)
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Photograph -
63
Studies of oxime complexes
Published 1981“…The complexing behaviour of 3-methyl-4-oxime-IH-pyrazol-4, 5-dione (poH) and 3-methyl-4-oxime-l-phenvl-lH-pyrazol-4,5-dione (PpoH) with nickel(II) and copper(II) has been reinvestigated. …”
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Thesis -
64
Studies of 3-hydroxypyrid-4-ones and related ligands
Published 1990“…The oxidation of this diol with Jones' reagent gave a mixture of products, one of which was identified as the desired product, 1-ethoxycarbonylpiperidene-3,4-dione using G.C.-mass spectrometry techniques. ...…”
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Thesis -
65
Innovative UWB phase shifters using groove gap-waveguide technology inspired by metasurfaces for beamforming networks operating at 100 GHz
Published 2025“…The metasurface features a "bed-of-nails" structure, where metal pins are connected to a bottom layer and spaced <λ/4 from a top plate. …”
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Conference or Workshop Item -
66
Copper complexes of dinucleating octa-azamacrocyclic ligands
Published 1982“…Three types of dinacleating tetraimine macrocycles have been prepared from 4,7-diaza-2,3;8,9-dibenzodecane-l,10-dione by condensation with the appropriate polyamine; I, large-ring octa-aza macrocycles e.g. the 28—membered ring compound 5,6,7,8,15,16,23,24,25,26,33,34— dodecahydrotetrabenzo(e,m,s,a’) (1,4,11,15,18,22,25) octaaza- cyclooctacosine and related 30- and 36- membered ring compounds; II, the "fused" bis(tetra-azamacrocycle) 5,6,7,8,22,23,24,25-octahydrotetrabenzo (f,f’1,1’) benzo (1,2-b:4,5-b’)- bis(1,4,8,)tetraazacyclotetradecine; III, the "Linked" bis(tetra-azamacrocycle) 5,6,7,8,24,25,26,27-octahydrotetrabenzo (f,f’,1,1)diphenyl(3,4-b:3’,4’-b’)bis(l,4,8,11)tetraazacyclotetradecine. …”
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Thesis -
67
Metamaterial based ultra-wideband antennas for portable wireless applications
Published 2017“…Various approaches have been reported to reduce the physical size of RF antennas including using high permittivity substrates, shorting pins, reactive components, and more recently, metamaterials (MTM) based on composite right-/left-handed transmission-lines (CRLH-TLs). …”
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Book Section -
68
Tetraazamacrocyclic ligands and their copper complexes
Published 1982“…Condensations of 4,8-diaza-2,3:9,10-dibenzoundecane-1,11-dione with a range of aliphatic and aromatic diamines has allowed the isolation of metal-free diimine macrocycles without recourse to metal template' or 'high dilution' techniques. …”
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Thesis -
69
Aligning internal market orientation (IMO) with market orientation (MO) to impact performance in the banking sector in Ghana
Published 2017“…The pioneering studies of Lings and Greenley on internal market orientation (IMO) in the 2000s and that of Kohli and Jaworski experience enormous investigation empirically. …”
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Thesis