Yan Tong, Li Yu-Yang, Su Jian, Wang Hai-Ying, Zuo Jing-Lin
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China.
School of Environmental Science, Xiaozhuang University, Nanjing, 211171, P. R. China.
Chemistry. 2021 Aug 2;27(43):11050-11055. doi: 10.1002/chem.202101607. Epub 2021 Jun 1.
Metal-organic frameworks (MOFs), as a class of new inorganic-organic hybrid crystal materials, could have important applications in near-infrared (NIR) photothermal conversion. Herein, a new charge-transfer MOF (Co-MOF) with mixed ligands of H TTFTB and bpmNDI incorporating redox-active tetrathiafulvalene/naphthalene diimide (TTF/NDI) units into one system is reported. Due to the presence of TTF/NDI oxidative and reductive couples, stable radicals can be observed in the MOF. In addition, charge transfer from the electron donor (TTF) to the acceptor (NDI) results in a broad absorption in the NIR region. The Co-MOF exhibited an efficient photothermal effect induced by irradiation with a NIR laser. Under the 808 nm laser (0.7 W cm ) illumination, the temperature of the Co-MOF increased from room temperature to 201 °C in only 10 s. Furthermore, a series of polydimethylsiloxane (PDMS) films doped with trace amounts of Co-MOF showed efficient NIR photothermal conversion. When a Co-MOF@PDMS (0.6 wt %) film is irradiated by 808 nm laser with power of 0.5 W cm , it's temperature can reach a plateau at 62 °C from 20 °C within 100 s. Our experimental results from the Co-MOF@PDMS film demonstrate that the effectiveness and feasibility of the material is promising for photothermal applications.
金属有机框架材料（MOFs）作为一类新型无机-有机杂化晶体材料，在近红外（NIR）光热转换方面可能具有重要应用。在此，报道了一种新型的电荷转移MOF（Co-MOF），它具有H TTFTB和bpmNDI的混合配体，将氧化还原活性四硫富瓦烯/萘二酰亚胺（TTF/NDI）单元整合到一个体系中。由于存在TTF/NDI氧化还原对，在MOF中可观察到稳定的自由基。此外，从电子供体（TTF）到受体（NDI）的电荷转移导致在近红外区域有宽吸收。Co-MOF在近红外激光照射下表现出高效的光热效应。在808 nm激光（0.7 W cm ）照射下，Co-MOF的温度仅在10 s内就从室温升至201 °C。此外，一系列掺杂微量Co-MOF的聚二甲基硅氧烷（PDMS）薄膜表现出高效的近红外光热转换。当Co-MOF@PDMS（0.6 wt %）薄膜在功率为0.5 W cm 的808 nm激光照射下，其温度可在100 s内从20 °C升至62 °C并达到稳定状态。我们对Co-MOF@PDMS薄膜的实验结果表明，该材料在光热应用方面具有有效性和可行性，前景广阔。
