The first structure elucidation of a lamellar gold thiolate coordination polymer is described. [Au(p-SPhCO2Me)]n is obtained from the simultaneous esterification of mercaptobenzoic acid and reduction of the Au(iii) precursor. Despite the presence of aurophilic interactions, the intense phosphorescence (QY ∼ 70%) originates from intra-ligand and metal-to-ligand transitions.
The structures of two lamellar silver
thiolate coordination polymers [Ag(p-SPhCO2H)]
n
(1) and [Ag(p-SPhCO2Me)]
n
(2) are described for the first time. Their inorganic part
is composed of distorted Ag3S3 honeycomb networks
separated by noninterpenetrated thiolate ligands. The main difference
between the two compounds arises from dimeric hydrogen bonds present
for the carboxylic acids. Indepth photophysical studies show that
the silver thiolates exhibit multiemission properties, implying luminescence
thermochromism. More interestingly, the synthesis of a heterometallic
lamellar compound, [Ag0.85Cu0.15(p-SPhCO2H)]
n
(3), allows to obtain mixed metal thiolate coordination polymers and
to tune the photophysical properties with the excitation wavelengths
from a green vibronic luminescence to a single red emission band.
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