Author(s):
1. Naheed Bibi:
Chemistry Department, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
Abstract:
Polypyridyl ligands like bipyridine, terpyridine and phenanthroline form stable complexes with various metal centers and affect the optical and electrochemical properties depending on their structure and functionalization with various electron donating and electron withdrawing groups.1The electron deficient rings like pyrazine, pyrimidine and pyridazine in combination with electron rich imidazole rings are comparatively under investigated. These ligands absorb intensely in the UV region, whereas their complexes display distinct electronic absorption spectra consisting of absorption bands in the UV region arising from ligand centered p-p* transitions (240-300 nm) and in the visible region by virtue of MLCT transitions (400-700 nm) having a lower molar extinction coefficient.2We investigated the electronic absorption spectroscopy of octahedral Ni(II) complexes prepared in-situ with terpy, dimpy and a set of bidentate ligands i.e., Impm, Impz, Impa and Impy and predicted the 10Dq values and parameter B. The lowest energy absorption band corresponds to the ligand field splitting parameter. We succeeded in obtaining the single crystals of [Ni(terpy)2]2+, [Ni(dimpy)2]2+ and [Ni(Impm)3]2+ and [Ni(Impa)3]2+ while the identity of the complexes was proved by their mass spectra.
Page(s):
290-290
DOI:
DOI not available
Published:
Journal: Abstract Book on International Conference on Food and Applied Sciences (ICFAS-23) 3-5 August 23, Volume: 0, Issue: 0, Year: 2023
Keywords:
MLCT
,
Polypyridyl ligands
,
Nickel complexes
,
Ligand Field Splitting
,
10Dq
References:
References are not available for this document.
Citations
Citations are not available for this document.