Millisecond-Long Red Phosphorescence in Chiral Heteroleptic Ag(I) Complexes Bearing Benzothiazole Ligands
Abstract
Six orange-red phosphorescent chiral Ag(I) complexes of general structure [Ag(N1^N2)(P^P)]PF6, where N1^N2 is a pyridyl- or quinolyl-functionalized benzo[d]thiazole and P^P is an enantiopure diphosphine of the BINAP family with axial chirality, are herein presented. The novel complexes have been extensively characterized from a chemical, structural, and photophysical point of view, resulting in a family of chiral Ag(I) coordination compounds with red photoluminescence. Their emissive properties can be attributed to ligand-centered triplet manifold excited states localized on the benzothiazole ligand (3LCbtz). Low photoluminescence quantum yield (PLQY) values are recorded in solution, as is typical of Ag(I) derivatives, whereas a remarkable switch-on of the emission is observed in the solid state, with samples of quinolyl-benzothiazole xylBINAP complexes R-3 and S-3 displaying PLQY as high as 50% and excited-state lifetimes in the millisecond range. Electron circular dichroism (ECD) spectra show strong activity in both solution and solid state as thin films for all the complexes. Time-dependent density functional theory (TD-DFT) calculations confirm the strong LCbtz nature of the major absorbing singlet and emissive triplet states and provide an argument behind the absence of circularly polarized luminescence (CPL) in these samples.
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BibTeX
@article{giuso2026millisecondlong,
title = {{Millisecond-Long Red Phosphorescence in Chiral Heteroleptic Ag(I) Complexes Bearing Benzothiazole Ligands}},
author = {Valerio Giuso and Christophe Gourlaouen and Lorenzo Arrico and Lorenzo Di Bari and Matteo Mauro},
journal = {Inorganic Chemistry},
year = {2026},
month = aug,
doi = {10.1021/acs.inorgchem.6c01416},
url = {https://cnrs.hal.science/hal-05766525v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Millisecond-Long Red Phosphorescence in Chiral Heteroleptic Ag(I) Complexes Bearing Benzothiazole Ligands
AU - Valerio Giuso
AU - Christophe Gourlaouen
AU - Lorenzo Arrico
AU - Lorenzo Di Bari
AU - Matteo Mauro
PY - 2026
DA - 2026/08/06
JO - Inorganic Chemistry
DO - 10.1021/acs.inorgchem.6c01416
UR - https://cnrs.hal.science/hal-05766525v1
AB - Six orange-red phosphorescent chiral Ag(I) complexes of general structure [Ag(N1^N2)(P^P)]PF6, where N1^N2 is a pyridyl- or quinolyl-functionalized benzo[d]thiazole and P^P is an enantiopure diphosphine of the BINAP family with axial chirality, are herein presented. The novel complexes have been extensively characterized from a chemical, structural, and photophysical point of view, resulting in a family of chiral Ag(I) coordination compounds with red photoluminescence. Their emissive properties can be attributed to ligand-centered triplet manifold excited states localized on the benzothiazole ligand (3LCbtz). Low photoluminescence quantum yield (PLQY) values are recorded in solution, as is typical of Ag(I) derivatives, whereas a remarkable switch-on of the emission is observed in the solid state, with samples of quinolyl-benzothiazole xylBINAP complexes R-3 and S-3 displaying PLQY as high as 50% and excited-state lifetimes in the millisecond range. Electron circular dichroism (ECD) spectra show strong activity in both solution and solid state as thin films for all the complexes. Time-dependent density functional theory (TD-DFT) calculations confirm the strong LCbtz nature of the major absorbing singlet and emissive triplet states and provide an argument behind the absence of circularly polarized luminescence (CPL) in these samples.
SN - 0020-1669
SN - 1520-510X
ER -