Ligand‐Dependent Locally Excited and Charge‐Transfer Emission in Linear Copper(I) Mesoionic Carbene Luminophores
Abstract
We describe the synthesis of a family of photoemissive linear Cu(I) complexes bearing mesoionic carbenes (MIC) and amido ligands of the general formula Cu(MIC)NR 2 (NR 2 = carbazolide, diphenylamide). Careful tuning of the electronic and structural properties of both ligands enables modulation of the emission wavelengths from 400 to 520 nm and determines whether emission occurs mainly from locally excited or charge-transfer states. Complexes containing naphthyl substituents in the MIC fragment generally show structured locally excited emissions, which is consistent with the presence of a low-lying triplet state localized on the naphthyl fragment. In contrast, complexes without the naphthyl group generally display broader emission with a larger charge transfer contribution. The Cu complex supported by Naph 2 Mes NPh 2 represents a unique case, displaying both a high-energy fluorescence and a lower-energy vibronically structured phosphorescence band. These results show that tuning the ligandcentered triplet state enabled us to exert exquisite control over the nature of the absorption and emission mechanisms of these emissive linear Cu(I) complexes.
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BibTeX
@article{leon2026liganddependent,
title = {{Ligand‐Dependent Locally Excited and Charge‐Transfer Emission in Linear Copper(I) Mesoionic Carbene Luminophores}},
author = {Felix León and Changfeng Si and Chenfei Li and Adisak Thanetchaiyakup and Thomas V Papineau and Denis Jacquemin and Eli Zysman‐colman and Han Sen Soo},
journal = {Advanced Optical Materials},
year = {2026},
month = sep,
doi = {10.1002/adom.71819},
url = {https://nantes-universite.hal.science/hal-05849007v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Ligand‐Dependent Locally Excited and Charge‐Transfer Emission in Linear Copper(I) Mesoionic Carbene Luminophores
AU - Felix León
AU - Changfeng Si
AU - Chenfei Li
AU - Adisak Thanetchaiyakup
AU - Thomas V Papineau
AU - Denis Jacquemin
AU - Eli Zysman‐colman
AU - Han Sen Soo
PY - 2026
DA - 2026/09/18
JO - Advanced Optical Materials
DO - 10.1002/adom.71819
UR - https://nantes-universite.hal.science/hal-05849007v1
AB - We describe the synthesis of a family of photoemissive linear Cu(I) complexes bearing mesoionic carbenes (MIC) and amido ligands of the general formula Cu(MIC)NR 2 (NR 2 = carbazolide, diphenylamide). Careful tuning of the electronic and structural properties of both ligands enables modulation of the emission wavelengths from 400 to 520 nm and determines whether emission occurs mainly from locally excited or charge-transfer states. Complexes containing naphthyl substituents in the MIC fragment generally show structured locally excited emissions, which is consistent with the presence of a low-lying triplet state localized on the naphthyl fragment. In contrast, complexes without the naphthyl group generally display broader emission with a larger charge transfer contribution. The Cu complex supported by Naph 2 Mes NPh 2 represents a unique case, displaying both a high-energy fluorescence and a lower-energy vibronically structured phosphorescence band. These results show that tuning the ligandcentered triplet state enabled us to exert exquisite control over the nature of the absorption and emission mechanisms of these emissive linear Cu(I) complexes.
SN - 2195-1071
ER -