Thiophenol-spaced 2D coordination polymers with extraordinary alkali resistance and efficient photothermal conversion

Abstract

Coordination polymers (CPs) based on metal-sulfur bonds are rare; we herein realize a series of thiol-functionalized linker-based CPs (thiol-CPs), MTBT (M = Fe, Co and Zn; TBT = dehydrated 4,4′-thiobisbenzenethiol), which feature an anionic two-dimensional (2D) network, [M(TBT)₂]_n²ⁿ⁻, with the tetrahedral coordination unit {MS₄} serving as a node. These compounds exhibit excellent hydrolytic stability, especially in alkaline solution (20M NaOH for five days), which is the highest value reported for CPs so far. In addition, among them, CoTBT displays favorable photo-thermal conversion effectiveness under an energy power of 0.5 W cm⁻² 808 nm laser irradiation for 15 s, with the temperature rising rapidly from room temperature to 135.2 °C.