Novel 2-naphthol luminophors for optoelectronics

Mane, K. G.; Nagore, P. B.; Pujari, S. R.

doi:10.1007/s00339-019-3024-8

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…As for 2e and 3e , the spectra reveal additional strong emissions at 380 nm and 450 nm, respectively, which are originated from 2‐naphthol and 7‐hydroxycoumarin. [ 16 ] Moreover, the emission at ca . 420 nm appears as a shoulder peak for 2e and 3e .…”

Section: Resultsmentioning

confidence: 99%

Trinuclear Dy(III) Single‐Molecule Magnets with Two‐Step Relaxation

et al. 2023

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Comprehensive SummaryThe reaction of DyCl3⋅6H2O with a rigid diacylhydrazone ligand (H2L) afforded a trinuclear precursor [Dy3L2Cl3(H2O)2(CH3OH)]Cl2⋅3CH3OH (1). The replacement of the Cl– ions and the coordinating solvents by the aryloxides ligands (Lx)– yields three trinuclear complexes [Dy3L2(Lx)5]⋅nsol (x = 1,2‐naphthol (2); x = 2,7‐hydroxycoumarin (3); and x = 3, phenol (4)). In complexes 2—4, two end Dy3+ centers adopt almost identical N4O4 coordination sphere of D6h geometry while the central one adopts N4O5 coordination sphere in Cs geometry. Magnetic measurements reveal weak antiferromagnetic interactions in the hydrated samples 2e—4e and two‐step slow relaxation process under zero dc field with effective energy barriers Ueff of 439 and 91 K, 353 and 40 K, 466 and 89 K for SR and FR in 2e—4e, respectively. Such dynamic magnetic behaviour for 4 persists in the magnetically diluted sample of 4@Y. Complex 4 possesses the short Dy‐Oaryloxide bond distance of 2.055(18) Å, and the largest Ueff among the reported linear trinuclear dysprosium complexes. Moreover, the functionalized aryloxides ligands (Lx)– show photoluminescence via intramolecular energy transfer, making 2e—4e luminescent Dy3+ SMMs with high energy barriers.

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Section: Resultsmentioning

confidence: 99%

Trinuclear Dy(III) Single‐Molecule Magnets with Two‐Step Relaxation

et al. 2023

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“…2‐Naphthol (2‐NP)‐doped materials are considered outstanding materials for energy transfer. Intramolecular charge transfer in excited states or excimers or exciplex formation are responsible for this type of energy transfer in doped organic matrices …”

Section: Introductionmentioning

confidence: 99%

Photophysical and structural aspects of perylene‐doped 2‐naphthol luminophors: Green emission by exciplex formation

Mane¹,

Nagore²,

Pujari

2019

Luminescence

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Several perylene (Pery)‐doped 2‐naphthol (2‐NP) (Pery/2‐NP) luminophors were prepared using conventional solid‐state reaction techniques. Energy transfer in the excited state was examined using fluorescence spectroscopy and cyclic voltammetry. Fluorescence studies revealed exciplex formation by Pery in the form of structureless and broad spectra at higher concentrations with monomer quenching of 2‐NP; a broad green emission was observed in the range 500–650 nm, peaking at 575 nm. Structural properties and thermal stability were analyzed using X‐ray diffraction, scanning electron microscopy and TGA‐differential scanning calorimetry. Highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels were observed in the range 5.56–5.61 eV and 2.79–2.81 eV, respectively with a 2.77–2.82 eV band gap. The present study reveals these to be probable candidates for hole‐transporting materials suitable in optoelectronics.

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