Aging effect on bonding properties of fluorescent neodymium materials

Ameen, Iffat; Tripathi, Abhishek Kumar; Mishra, Raj Laxmi; Siddiqui, Afshan; Tripathi, U. N.

doi:10.1016/j.kijoms.2018.05.001

Cited by 5 publications

(3 citation statements)

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“…The absorption and emission spectrum peaks were used to compute the quantum yields of these neodymium complexes in accordance with published explanations, [60] and their results are shown in Table 7. These neodymium compounds have a small Stoke shift, which means that only a vibrational shift has taken place [60] …”

Section: Resultsmentioning

confidence: 99%

“…These neodymium compounds have a small Stoke shift, which means that only a vibrational shift has taken place. [60] The widely recognised energy diagram, shown in Figure 9, illustrates how energy is absorbed by the acylpyrazolone ligand, known as the "CL (central ligand)", transferred to the metal ion, and then returned to the ground state. [61] The main ideas pertaining to the emission process of neodymium ions can be explained using this diagram.…”

Section: ¼mentioning

confidence: 99%

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Structural Features, Emission Analysis, and Covalency Comparison of Neodymium Acylpyrazolone Complexes using Oscillator Strengths, Covalency and Judd‐Ofelt Parameters**

Travadi,

Jadeja,

Butcher

2023

ChemistrySelect

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Three distorted square antiprismatic eight coordinated neodymium acylpyrazolone complexes were synthesized having the compositions [Nd(L1)3(H2O)(EtOH)] (NdL1), [Nd(L2)3(H2O)(EtOH)] (NdL2), and [Nd(L3)3(H2O)(EtOH)] (NdL3). The structure of all three complexes was examined using ESI‐mass, FT‐IR, and thermogravimetric methods. According to the single crystal analysis of NdL1, the complex was found eight‐coordinated (NdO8) with a distorted square antiprismatic geometry. A powder XRD pattern confirmed a similar structural arrangement of the other two complexes. In electronic absorption spectra, the transition 4G5/2←4I9/2, which is close to the centre of the visible spectrum (~17,500 cm−1), exhibits hypersensitivity, which stands out in stark contrast to the behaviour of many other typically weak and reliably unchanging, typical 4f–4f transitions. Through a comparative analysis of calculated oscillator strength, Judd‐Ofelt parameters, root mean square deviation, radiative lifetime and covalency parameters in various solvents, hypersensitivity, symmetry characteristics, and covalency have been thoroughly investigated. The promotion of 4f–4f electric‐dipole intensity has been found to be particularly successful with ethanol, pyridine, DMF, and DMSO. Utilizing Judd‐Ofelt Ω4 values and Hirshfeld analysis, long‐range secondary π⋅⋅⋅π stacking or H‐bonding interactions were investigated. The intensity of emission spectra, quantum yield, stokes shift, and antenna effect energy diagram was examined using solid‐state emission spectra.

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Section: Resultsmentioning

confidence: 99%

Section: ¼mentioning

confidence: 99%

Structural Features, Emission Analysis, and Covalency Comparison of Neodymium Acylpyrazolone Complexes using Oscillator Strengths, Covalency and Judd‐Ofelt Parameters**

Travadi,

Jadeja,

Butcher

2023

ChemistrySelect

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“…5. The increase in the size of particles in comparison to the size of crystallite obtained by PXRD is due to the intermolecular hydrogen bonding which results in associated molecules of large particle size at the surface [44,45].…”

Section: Micrographic Studiesmentioning

confidence: 98%