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Platinum (II) sulfide is an inorganic solid compound with the formula PtS and is green in color, insoluble in all solvents. It is characterized by square planar Pt atoms and tetrahedral sulfide centers.

Achieving Controllable Size of platinum ii sulfide Nanodots for Multimodal Cancer Imaging and Photothermal Therapy

Noble metal chalcogenides such as platinum (II) sulfide hold tremendous potential as efficient agents for cancer theranostics to improve both accuracy and efficiency of cancer diagnosis and treatment. However, a critical bottleneck remains in exploring simple and controllable synthetic methods for these unique materials.

Here, we report an albumin-templated biomineralization synthesis of tunable platinum ii sulfide nanodots (PtS-NDs) for multimodal cancer imaging and potent photothermal therapy. The NDs were precisely synthesized with a tunable core diameter ranging from 2.1 nm to 4.5 nm through a thermodynamically controlled growth inside albumin nanocages. The resulting PtS-NDs displayed significant near-infrared (NIR) absorbance and outstanding photothermal conversion under NIR laser irradiation, as well as effective resistance to photobleaching, leading to remarkable in vivo photoacoustic signals and hyperthermia at tumor site.

XPS of PtS2 and PtS films: the Pt 4f and S 2p core-levels, and d-d transitions

The d-d transitions for coordinating solvents such as acetonitrile, dimethyl sulfoxide, and 1,4-dioxane are well resolved. In contrast, the d-d bands in chloroform and dichloro-methane are not as well resolved because of their proximity to the intense charge transfer band.

In modern coordination chemistry, the d-d band shifts from one solvent to another due to the increase in solvent interaction at the vacant octahedral sites. This is a result of d-level ordering in the square planar complexes of platinum(I1), where the dZ2 orbital of platinum is shifted to a higher energy.

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