Luminescence Study of the Interaction of Carboxymethyl Chitosan with Metal Ions

Wu, Min; You, Jung-Suk; Zh, Song

doi:10.1007/s10812-014-9976-8

Cited by 2 publications

(2 citation statements)

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“…The decay lifetime curves of the Eu(III) for both complexes are shown in Figure 12, with emission monitored at 616 nm with a 290 nm excitation energy. The observed mono-exponential fitting (goodness of fit, R 2 = 0.99991 and 0.9996 for 2 and 3, respectively) indicates that both complexes present a homogeneous composition [48]. The average life (τ av) increases from 0.42 ms in 2 to 0.53 ms 3.…”

Section: Luminescence Decay Profilesmentioning

confidence: 86%

“…In addition, is well known that water molecules serve as quenching sites in many Eu(III) carboxylate complexes when they are at the coordination sphere due to can efficiently non-radiatively depopulate the 5 D 0 excited state of Eu 3+ [50,51]. present a homogeneous composition [48]. The average life (τ av) increases from 0.42 ms in 2 to 0.53 ms 3.…”

Section: Luminescence Decay Profilesmentioning

confidence: 99%

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New Mononuclear Complex of Europium(III) and Benzoic Acid: From Synthesis and Crystal Structure Solution to Luminescence Emission

et al. 2020

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This study presents a general method which can be used for the synthesis of mononuclear complexes with europium(III) and organic ligands with carboxylic groups. It describes the procedure for preparing a new mononuclear coordination complex with europium(III) and carboxylate ligands sourced from benzoic acid. The construction of mononuclear complexes with a coordination sphere saturated in carboxylic ligands must go through the preparation and purification of a europium(III) intermediate complex that presents a coordination sphere with anions that will be later exchanged for carboxylic groups and finally precipitated as a solvent-free or anion-free complex within the coordination sphere. The detailed synthesis procedure for powders of a new complex, as well as studies of its structural composition at each phase and luminescent properties, are detailed in this study. Analytical and spectroscopic data reveal the formation of a new mononuclear complex of the general formula [Eu(OOCC6H5)3·(HOOCC6H5)2]. The crystal structure of the Eu(III) complex was solved using X-ray powder diffraction data and EXPO2014 software, and the crystal structure result was deposited in the CCDC service with number 19771999.

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Section: Luminescence Decay Profilesmentioning

confidence: 86%