Abstract
For further understanding of the molecular absorption mechanisms of photothermal conversion by coordination compounds, two newly prepared xanthene-functionalized silver(I) complexes, [Ag2(X9A)2(dppm)2] (1) (where dppm = bis(diphenylphosphino)methane and X9A = 9H-xanthene-9-carboxylato(-1)) and [Ag4(X9A)4(dppm)2]·6CH3OH (2), have been isolated and structurally characterized. We report here the syntheses, crystal structures, characterizations by various spectroscopic (IR, UV–Vis, powder XRD) techniques, as well as photothermal conversion performance of 1 and 2. Their X-ray crystal structures reveal that 1 is a binuclear silver(I) coordination compound bridged by two dppm molecules with two monodentate 9H-xanthene-9-carboxylato(-1) ligands, and 2 can be described as the dimer of 1 bridged by two 9H-xanthene-9-carboxylato(-1) anions in the μ3-η1,η2 coordination mode. Their photothermal conversion experimental results give new insight into understanding the molecular mechanisms for improving the performance of photothermal conversion molecular materials.
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