N-heterocyclic carbene-stabilized Cu<sub>9</sub> clusters with combined thermally activated delayed fluorescence and phosphorescence

Zhang, Lin-Mei; Xie, Mo; Wei, Hui-Zhi; Yuan, Shang-Fu; Li, Dong-Sheng; Wu, Tao

doi:10.1039/d4qi00160e

“…The abnormal thermally enhanced emission intensity from 80 to 140 K and a slight blue-shift of the emission suggests that the thermally activated delayed fluorescence (TADF) may be involved in this process, where excitons transfer from the lower-lying excited states to the higher-lying excited states, corresponding to a reverse intersystem crossing (rISC) between the triplet and singlet states. 63–69…”

Section: Resultsmentioning

confidence: 99%

Construction and characterization of an inorganic–organic hybrid copper(i) iodide coordination polymer with semiconducting luminescence

Yang,

Kuang,

Mi

et al. 2024

New J. Chem.

1

0

View full text Add to dashboard Cite

show abstract

Ln³⁺ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln₂Ag₂₈

Wang,

He,

Lv

et al. 2024

Angewandte Chemie

1

0

View full text Add to dashboard Cite

A series of TADF‐active compounds: 0D chiral Ln‐Ag(I) clusters L‐/D‐Ln2Ag28‐0D (Ln = Eu/Gd) and 2D chiral Ln‐Ag(I) cluster‐based frameworks L‐/D‐Ln2Ag28‐2D (Ln = Gd) has been synthesized. Atomic‐level structural analysis showed that the chiral Ag(I) cluster units {Ag14S12} in L‐/D‐Ln2Ag28‐0D and L‐/D‐Ln2Ag28‐2D exhibited similar configurations, linked by varying numbers of [Ln(H2O)x]3+ (x = 6 for 0D, x = 3 for 2D) to form the final target compounds. Temperature‐dependent emission spectra and decay lifetimes measurement demonstrated the presence of TADF in L‐Ln2Ag28‐0D (Ln = Eu/Gd) and L‐Gd2Ag28‐2D. Experimentally, the remarkable TADF properties primarily originated from {Ag14S12} moieties in these compounds. Notably, {Ag14S12} in L‐Eu2Ag28‐0D and L‐Gd2Ag28‐2D displayed higher promote fluorescence rate and shorter TADF decay times than L‐Gd2Ag28‐0D. Combined with theoretical calculations, it was determined that the TADF behaviors of {Ag14S12} cluster units were induced by 4f perturbation of Ln3+ ions. Specially, while maintaining ΔE(S1‐T1) small enough, it can significantly increase k(S1→S0) and reduce TADF decay time by adjusting the type or number of Ln3+ ions, thus achieving the purpose of improving TADF for cluster‐based luminescent materials.

show abstract

Ln³⁺ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln₂Ag₂₈

Wang,

He,

Lv

et al. 2024

Angew Chem Int Ed

0

View full text Add to dashboard Cite

A series of TADF‐active compounds: 0D chiral Ln‐Ag(I) clusters L‐/D‐Ln2Ag28‐0D (Ln = Eu/Gd) and 2D chiral Ln‐Ag(I) cluster‐based frameworks L‐/D‐Ln2Ag28‐2D (Ln = Gd) has been synthesized. Atomic‐level structural analysis showed that the chiral Ag(I) cluster units {Ag14S12} in L‐/D‐Ln2Ag28‐0D and L‐/D‐Ln2Ag28‐2D exhibited similar configurations, linked by varying numbers of [Ln(H2O)x]3+ (x = 6 for 0D, x = 3 for 2D) to form the final target compounds. Temperature‐dependent emission spectra and decay lifetimes measurement demonstrated the presence of TADF in L‐Ln2Ag28‐0D (Ln = Eu/Gd) and L‐Gd2Ag28‐2D. Experimentally, the remarkable TADF properties primarily originated from {Ag14S12} moieties in these compounds. Notably, {Ag14S12} in L‐Eu2Ag28‐0D and L‐Gd2Ag28‐2D displayed higher promote fluorescence rate and shorter TADF decay times than L‐Gd2Ag28‐0D. Combined with theoretical calculations, it was determined that the TADF behaviors of {Ag14S12} cluster units were induced by 4f perturbation of Ln3+ ions. Specially, while maintaining ΔE(S1‐T1) small enough, it can significantly increase k(S1→S0) and reduce TADF decay time by adjusting the type or number of Ln3+ ions, thus achieving the purpose of improving TADF for cluster‐based luminescent materials.

show abstract

N-heterocyclic carbene-stabilized Cu₉ clusters with combined thermally activated delayed fluorescence and phosphorescence

Abstract: Metal clusters with both phosphorescence and thermally activated delayed fluorescence (TADF) at room temperature, allowing for efficient light emission and a short lifetime, are of particular interest. However, such clusters...

Cited by 3 publications

References 43 publications

Construction and characterization of an inorganic–organic hybrid copper(i) iodide coordination polymer with semiconducting luminescence

Construction and characterization of an inorganic–organic hybrid copper(i) iodide coordination polymer with semiconducting luminescence

Ln³⁺ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln₂Ag₂₈

Ln³⁺ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln₂Ag₂₈

Contact Info

Product

Resources

About

N-heterocyclic carbene-stabilized Cu9 clusters with combined thermally activated delayed fluorescence and phosphorescence

Abstract: Metal clusters with both phosphorescence and thermally activated delayed fluorescence (TADF) at room temperature, allowing for efficient light emission and a short lifetime, are of particular interest. However, such clusters...

Cited by 3 publications

References 43 publications

Construction and characterization of an inorganic–organic hybrid copper(i) iodide coordination polymer with semiconducting luminescence

Construction and characterization of an inorganic–organic hybrid copper(i) iodide coordination polymer with semiconducting luminescence

Ln3+ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln2Ag28

Ln3+ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln2Ag28

Contact Info

Product

Resources

About

N-heterocyclic carbene-stabilized Cu₉ clusters with combined thermally activated delayed fluorescence and phosphorescence

Ln³⁺ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln₂Ag₂₈

Ln³⁺ Induced Thermally Activated Delayed Fluorescence of Chiral Heterometallic Clusters Ln₂Ag₂₈