Abstract
Photothermal conversion is one of the key technologies in solar energy collection,seawater desali-nation,photothermal treatment and other important fields.In order to develop next generation photothermal materials,four polyoxometalates,[(CH3)2NH2]12H5[Ni3Mo18O54(HPO3)10(PO4)]·18H2O(Compound 1),[(CH3)2NH2]1 Na11[Ni2Mo8O22(HPO3)10]·16H2O(Compound 2),Na15(OH)5[Mo6O18(HPO3)4]2[MoO]1.5·16H2O(Compound 3),[(CH3)2NH2]4Na11[Na[Mo6O15(HPO3)4]2]·18H2O(Com-pound 4),are successfully designed and synthesized via a microwave-assisted reaction protocol.Compounds 1-4 not only exhibit broad absorption and notable photothermal conversion effects in near-infrared(NIR)region,but also have high photothermal conversion efficiencies and high quality NIR photothermal imaging effects under NIR laser irradiation.Compound 1 shows the best photothermal conversion effect,and it provides a unique model to explore the relationship between the complex metal oxide structure and photothermal conversion behavior at the molecular level.Both the experimental results and theo-retical calculations consistently conclude that the charge and degree of electron delocalization on the Cluster have a robust influence on the photothermal conversion,as well as the aggregation microstructures.
维普
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