Improved Quantum Yield and Excellent Luminescence Stability of Europium‐Incorporated Polymeric Hydrogen‐Bonded Heptazine Frameworks Due to an Efficient Hydrogen‐Bonding Effect

Yang, Chao; Folens, Karel; Laing, Gijs Du; Artizzu, Flavia; Deun, Rik Van

doi:10.1002/adfm.202003656

Cited by 23 publications

(21 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…promoted by the Shibasaki catalysts [Ln(binol) 3 (M) 3 ] (M=alkali metal, Ln=lanthanide, binol=1,1′‐ bi ‐2‐naphthol) [102] . Moreover, the roles of intermolecular hydrogen bonding in the improved quantum yield and excellent luminescence stability, [103] photoactivity, [104] proton conductivity, [105] extraction, [63] etc. of lanthanide complexes have also been demonstrated.…”

Section: Hydrogen Bondingmentioning

confidence: 99%

Noncovalent Interactions at Lanthanide Complexes

Mahmudov

Huseynov

Aliyeva

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

Lanthanide complexes have attracted a widespread attention due to their structural diversity, as well as multifunctional and tunable properties. The development of lanthanide based functional materials has often relied on the design of the secondary coordination sphere of the corresponding lanthanide complexes. For instance, usually simple lanthanide salts (solvento complexes) do not catalyze effectively organic reactions or provide low yield of the expected product, whereas the presence of a suitable organic ligand with a noncovalent bond donor or acceptor centre (secondary coordination sphere) modifies the symmetry around the metal centre in lanthanide complexes which then successfully can act as catalysts in both homogenous and heterogenous catalysis. In this minireview, we discuss several relevant examples, based on X‐ray crystal structure analyses, in which the hydrogen, halogen, chalcogen, pnictogen, tetrel and rare‐earth bonds, as well as cation‐π, anion‐π, lone pair‐π, π–π and pancake interactions, are used as a synthon in the decoration of the secondary coordination sphere of lanthanide complexes.

show abstract

Section: Hydrogen Bondingmentioning

confidence: 99%

Noncovalent Interactions at Lanthanide Complexes

Mahmudov

Huseynov

Aliyeva

et al. 2021

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Although the EL efficiency is low, it still demonstrates that heptazine-based discotic liquid crystals may contribute to the further development of AIE-based blue emitters. Yang et al investigated the hydrogen-bonding effect on PLQEs and luminescence stability of polymeric hydrogen-bonded heptazine frameworks (P-HHF, Figure 2) and trivalent europium ions incorporated P-HHF (P-HHF-Eu) (Yang et al, 2020). The hydration degrees and the role of hydrogen bonding in the emission properties were analyzed by time-resolved and steady state PL spectroscopies.…”

Section: Monomeric Heptazine-based Light-emitting Traditional Fluorescencementioning

confidence: 99%

Heptazine-Based π-Conjugated Materials for Light-Emitting

Wang

et al. 2021

Front. Chem.

View full text Add to dashboard Cite

On the basis of planar and relatively rigid nitrogen-rich heterocyclic system of the heptazine core, heptazine-based π-conjugated materials have aroused widespread attention over the past decade by virtue of the fascinating electronic, optical, thermal, and mechanical properties in the fields of light-emitting, photocatalysis, sensors, environmental remediation, and so forth. However, there are still several obstacles to be solved before practical applications, such as low photoluminescence quantum efficiencies for light-emitting and weak visible absorption for photocatalysis. To further enhance various properties of heptazine-based π-conjugated materials, a series of strategies have been developed, including ingenious molecular design and modification, novel synthetic, and preparation methods. In this review, the significant progress of monomeric and polymeric heptazine-based π-conjugated materials and their applications typically in light-emitting are reviewed, which is beneficial for the acceleration of practical applications of heptazine-based materials and devices.

show abstract

“…Upon increasing the Eu 3+ loading, the CHN content of MIT:Eu gradually drops while the N/C ratio also slightly reduces, which might be due to an increase of structure defects in the MIT framework likely as a result of metal coordination. 13 The actual Eu 3+ concentration in the MIT:Eu samples was investigated by inductively coupled plasma mass spectrometry (ICP-MS) which evidenced a metal content below 2% (Table S2, ESI †). The transmission electron microscopy (TEM) images of the as-synthesized MIT shown in Fig.…”

Section: Synthesis Structure and Morphologymentioning

confidence: 99%

“…11 A successful strategy to expand the functionality of these HOFs materials relies on the incorporation of emissive lanthanide ions (Ln), as we have recently shown. [12][13][14][15] In contrast to the broad emission bands from organic moieties, luminescent Ln 3+ centers deliver narrow emission lines from f-f transitions which are characterized by large Stokes' shifts and limited lifetimes, typically in the microsecond range. They can be conveniently sensitized by energy transfer from the embedding organic matrix yielding a material which can provide multiple emission colours through a single-wavelength excitation.…”

Section: Introductionmentioning

confidence: 99%