Coordination environment driven luminescence in mononuclear and dinuclear dysprosium(iii) β-diketonate complexes
4 affiliations
- 1Department of Chemistry, Maharshi Dayanand University Rohtak-124001 Haryana India [email protected] [email protected].
- 2Department of Chemistry, DCR University of Science and Technology Murthal-131039 Haryana India.
- 3Department of Chemistry, Kurukshetra University Kurukshetra 136119 Haryana India.
- 4Department of Chemistry, COBS&H, CCS Haryana Agricultural University Hisar-125004 Haryana India.
Abstract
A series of Dy(iii) complexes with 4-bromobenzoylacetone (BBA) as a sensitizing β-diketonate ligand and pyrazine as an auxiliary N-donor ligand was synthesized to study the influence of coordination environment and nuclearity on optical properties. Three complexes - aqua (DyA), mononuclear pyrazine-coordinated (DyM) and pyrazine-bridged dinuclear (DyD) have been studied spectroscopically and photophysically. Electronic absorption and excitation analysis indicate that the ligand-centered π → π* transitions dominate the excitation process, highlighting the antenna role of the coordinating ligand framework in sensitizing the Dy(iii) center. The complexes emit the typical Dy(iii) emission peaks from the ⁴F9/2 excited state upon excitation, producing blue and yellow emission peaks along with a peak at ∼669 nm. The variations in emission intensity, lifetime, quantum yield and branching ratios show that there is a strong dependence of optical properties on the coordinating environment. The chromaticity analysis indicates tunable emission towards the white region and the optical band gap estimation indicates that the complexes are in the semiconducting range, which indicates their potential application in the field of photonic and optoelectronic applications.
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BibTeX
@article{malik2026coordination,
title = {{Coordination environment driven luminescence in mononuclear and dinuclear dysprosium(iii) β-diketonate complexes}},
author = {Sofia Malik and Komal Jakhar and Devender Singh and Swati Dalal and Sumit Kumar and Rajender Singh Malik and Parvin Kumar and Jayant Sindhu},
journal = {RSC advances},
year = {2026},
month = nov,
doi = {10.1039/d6ra06053f},
url = {https://europepmc.org/article/PMC/PMC13726136},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Coordination environment driven luminescence in mononuclear and dinuclear dysprosium(iii) β-diketonate complexes
AU - Sofia Malik
AU - Komal Jakhar
AU - Devender Singh
AU - Swati Dalal
AU - Sumit Kumar
AU - Rajender Singh Malik
AU - Parvin Kumar
AU - Jayant Sindhu
PY - 2026
DA - 2026/11/02
JO - RSC advances
DO - 10.1039/d6ra06053f
UR - https://europepmc.org/article/PMC/PMC13726136
AB - A series of Dy(iii) complexes with 4-bromobenzoylacetone (BBA) as a sensitizing β-diketonate ligand and pyrazine as an auxiliary N-donor ligand was synthesized to study the influence of coordination environment and nuclearity on optical properties. Three complexes - aqua (DyA), mononuclear pyrazine-coordinated (DyM) and pyrazine-bridged dinuclear (DyD) have been studied spectroscopically and photophysically. Electronic absorption and excitation analysis indicate that the ligand-centered π → π* transitions dominate the excitation process, highlighting the antenna role of the coordinating ligand framework in sensitizing the Dy(iii) center. The complexes emit the typical Dy(iii) emission peaks from the ⁴F9/2 excited state upon excitation, producing blue and yellow emission peaks along with a peak at ∼669 nm. The variations in emission intensity, lifetime, quantum yield and branching ratios show that there is a strong dependence of optical properties on the coordinating environment. The chromaticity analysis indicates tunable emission towards the white region and the optical band gap estimation indicates that the complexes are in the semiconducting range, which indicates their potential application in the field of photonic and optoelectronic applications.
SN - 2046-2069
ER -