请帮我翻译以下段落：随着当前经济的不断发展化石燃料的燃烧使得大气中的二氧化碳浓度逐渐升高进而引发了温室效应以及各种气候问题。选择性地捕获且高效地分离二氧化碳对于缓解当前气候问题具有重要的现实意义。金属有机框架MetalOrganic Framework MOF材料由于高的比表面积、孔径可调控、高的热稳定性与机械稳定性被广泛应用于气体吸附领域尤其是对二氧化碳的捕集与分离具有重要的实际应用价值。 本

With the continuous development of the current economy, the burning of fossil fuels has led to a gradual increase in carbon dioxide concentration in the atmosphere, which in turn has caused greenhouse effects and various climate problems. Selectively capturing and efficiently separating carbon dioxide has important practical significance for alleviating current climate problems. Metal-organic framework (MOF) materials, due to their high specific surface area, controllable pore size, high thermal stability, and mechanical stability, have been widely used in the field of gas adsorption, especially in the capture and separation of carbon dioxide, and have important practical application value. In this paper, two new pillar-layered metal-organic frameworks were synthesized by solvothermal method using Zn(II) as the central metal and three nitrogen atoms and two carboxylic acid ligands, and the gas adsorption separation, structural transformation, and fluorescence sensing properties of the MOFs were studied. Firstly, a new pillar-layered metal-organic framework material, the complex [Zn2(ATZ)2(SQA)]·DMF, was synthesized by mixing the ligands SQA and ATZ with Zn(NO3)2·6H2O under solvothermal conditions. The complex has good thermal stability and chemical stability. Next, we mainly studied the adsorption and separation performance of this material for CO2/N2. After activation, single-component CO2 and N2 gas adsorption experiments were performed after reaching the theoretical adsorption capacity of the complex. According to the adsorption isotherms of CO2 at 273 K, 298 K, and 313 K, the adsorption heat (Qst) of the complex was calculated using the virial equation as 37.4 kJ/mol, indicating that the adsorption of CO2 is physical adsorption. The selectivity separation ratio of CO2/N2 at normal temperature and pressure was calculated by the ideal adsorption solution theory, and the separation ratio was 74, which can meet the requirements of CO2 separation. Secondly, by replacing the dicarboxylic acid pillar in the two-dimensional interlayer support, we replaced SQA with 9,10-anthracene dicarboxylic acid (H2ADC) and reacted with Zn(NO3)2·6H2O and TRZ under solvothermal conditions to obtain a second isomorphic pillar-layered metal-organic framework material, the complex [Zn2(TRZ)2(ADC)]·DMF. We mainly studied the transformation behavior of this structure. After removal of the solvent, the complex [Zn2(TRZ)2(ADC)]·DMF changed into the activated phase [Zn2(TRZ)2(ADC)]. After passing CO2 gas, it transformed into the CO2-containing guest phase [Zn2(TRZ)2(ADC)]·CO2, and then continued to pass N2, it transformed into the activated phase. These transformation processes can be observed through the change of PXRD diffraction peaks. Similarly, the adsorption isotherms of CO2 at different temperatures also showed step-like adsorption jump behavior, which also proved that the MOF underwent a structural transformation. In addition to the adsorption jump behavior, the structural transformation is also reflected in the fluorescence. After removing the guest DMF, the complex [Zn2(TRZ)2(ADC)]·DMF undergoes fluorescence transformation, changing from the original synthesized blue-violet light to the white light of the activated phase. Further introduction of CO2 into the activated phase will cause the white light to change back to blue-violet light. This fluorescence transformation is expected to be applied to CO2 gas sensing using this material. Finally, the paper summarizes the research conclusions and prospects for potential applications.