Towards white light emission from a hybrid thin film of a self-assembled ternary samarium(iii) complex
New Journal of Chemistry, vol.44, no.15, pp.5673-5683, 2020 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 44 Issue: 15
- Publication Date: 2020
- Doi Number: 10.1039/c9nj06287d
- Journal Name: New Journal of Chemistry
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, Chimica, EMBASE, DIALNET
- Page Numbers: pp.5673-5683
- Open Archive Collection: AVESIS Open Access Collection
- Ondokuz Mayıs University Affiliated: Yes
Abstract
A new samarium complex [Sm(hfaa)3(Py-Im)] (ML) was synthesized by utilizing hexafluoroacetylacetone (hfaa) and 2-(2-pyridyl)benzimidazole (Py-Im) as coordinating ligands. Single crystal X-ray analysis shows that in the solid-state the complex dimerizes through intermolecular hydrogen-bonding with N-H⋯O (2.127 Å) and N-H⋯F (2.576 Å) interactions. The complex in the solid-state displayed highly monochromatic brilliant red emission with Commission International de I'Eclairage (CIE) color coordinates of 0.6532; 0.3336, with a remarkably long luminescence lifetime (τexp. ≈ 204.47 ± 4.043 μs) and a high intrinsic quantum yield (QSmSm ≈ 6.60%). Furthermore, the complex in different organic media displayed color tunability from orange (CIE; 0.6071; 0.3568) to violet (CIE; 0.3634; 0.2144) with τexp. from 105.50 ± 0.143 to 14.27 ± 0.033 μs. Hybrid and flexible thin films obtained by doping different concentrations (1%, 2%, 4% and 6%) of the complex into the poly(urethane) (PU) polymer matrix also exhibited color tunability from violet (CIE; 0.3380; 0.2162) to light orange (CIE; 0.5666; 0.3408). White light emission from a 1% doped thin film of the complex was realized by changing the excitation wavelength. Thus, the new material could be a potential candidate for the fabrication of full-color display devices and for solid-state lighting (SSL) applications.