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Ultima descărcare din IBN: 2023-09-13 17:25 |
SM ISO690:2012 CULEAC, Ion, VERLAN, Victor, BORDIAN, Olga, ZUBAREVA, Vera, YOVU, M., BULHAK, Ion, SIMINEL, Nikita, SIMINEL, Anatolii, MIHAI, G., ENACHESCU, Marius. Synthesis and Characterization of Coordination Compound [Eu(µ2-OC2H5)(btfa)(NO3)(phen)]2phen with High Luminescence Efficiency. In: Nanomaterials, 2022, vol. 12, pp. 1-14. ISSN 2079-4991. DOI: https://doi.org/10.3390/nano12162788 |
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Nanomaterials | |||||||
Volumul 12 / 2022 / ISSN 2079-4991 /ISSNe 2079-4991 | |||||||
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DOI:https://doi.org/10.3390/nano12162788 | |||||||
Pag. 1-14 | |||||||
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A high-luminescent, blue-light excitable europium(III) coordination complex, [Eu(µ2-OC2H5)(btfa)(NO3)(phen)]2phen (1) {btfa = benzoyl trifluoroacetone, phen = 1,10-phenantroline}, has been synthesized and investigated. The complex was characterized by infrared (IR) and photoluminescence (PL) spectroscopy. The PL emission spectra of powder samples registered in a range of 10.7–300 K exhibit characteristic metal-centered luminescence bands, assigned to internal radiative transitions of the Eu3+ ion, 5D1→7Fj and 5D0→7Fj (j = 0–4). The high-resolution spectrum of the transition 5D0→7F0 shows that it consists of two narrow components, separated by 0.96 meV, which indicates the presence in the matrix of two different sites of the Eu3+ ion. The splitting pattern of 5D0→7Fj (j = 0–4) transitions indicates that europium ions are located in a low-symmetry environment. The absolute quantum yield and the sensitization efficiency were determined to be 49.2% and 89.3%, respectively. The complex can be excited with low-cost lasers at around 405 nm and is attractive for potential applications in optoelectronics and biochemistry. |
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Cuvinte-cheie blue-light excitable, dinuclear coordination compound, europium(III), photoluminescence, Quantum yield |
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