In this work， a teaching experiment was designed to tune the carbon capture performance of deep eutectic solvents （DESs） by using hydrogen bonds. In the experiment， tetraethylammonium 4-fluorophenolate ([Et 4 N] [4-F-PhO]) was used as the hydrogen bond acceptor， and ethylene glycol （EG） and 4-fluorophenol （4-F-PhOH） were used as hydrogen bond donors to synthesize a variety of DESs for CO 2 capture. The CO 2 capacities of DESs were measured， and the CO 2 capture mechanisms by DESs were investigated by using nuclear magnetic resonance （NMR） and Fourier transform infrared （FTIR） spectra. The results indicated that the strength of hydrogen bonds between the anion [4-F-PhO] ─ and hydrogen bond donors had an important influence on the CO 2 capacity of DESs. This experiment is combined with hot topics， which will help stimulate students’ interest in scientific research and improve their practical operation ability.
随着我国城市化进程加快和工业化程度加大,水环境保护问题愈发突出.水质的实时监测是水质治理的重要前提之一.从水质实时监测发展历程中的各项技术谈起,介绍和比较多种光学传感法,并着重聚焦于新兴的量子点微型光谱传感技术.量子点光谱仪是基于胶体量子点材料的重建式微型光谱仪,具有成本较低、性能优良、发展潜力大等诸多优势,目前已实际应用到水环境实时监测中.最后总结并展望了水质实时监测技术未来的发展方向.
酮的多元卤代和α-卤代酮的Favorskii重排都是醛酮教学的重要内容,且都是在碱性条件下烯醇化后发生的.但是,前者是在含有卤素一侧烯醇化,而后者却是在不含卤素一侧烯醇化.这种烯醇化的"随意性"常引起学生困惑,甚至认为此2处的烯醇化是"矛盾"的.通过分析卤代酮烯醇化的可逆性和Favorskii重排的不可逆性合理地解释了 Favorskii重排中烯醇化的合理性,化解了教学中的这一"矛盾".
物理化学课程内容的编排顺序是物理化学教学中的核心问题之一,教指委发布的《化学类专业化学理论教学建议内容》对其并未明文规定,经典教材对此处理各有不同.经过对比和分析不同经典教材的编排顺序差别,可以看出物理化学的学科思维和认知规律是决定编排顺序的两大原则.依据学科思维从空间、时间、体系等3个维度为物理化学课程的核心内容画出逻辑关系图,并结合认知规律提出了多种编排内容的方式.
As an essential chemical element in all life forms, phosphorus plays a nonnegligible role in a series of processes including energy metabolism, micro-and macromolecular structural modification, and the central dogma. While relevant mechanisms and regulations of enzymatic reactions are often mentioned in biochemistry curricula, a systemic analysis and discussion still remains elusive. By looking at the fundamental structures and reactions of organophosphate and phosphoric anhydride, here we elucidate the mechanisms of relevant regulatory enzymes in cells and aim to systematically clarify in vivo transformation of adenosine triphosphate, the most characteristic and important species of phosphoric anhydride. As a summary of biological processes of phosphorus, this manuscript not only serves as an exploration of new pedagogical models in chemistry and life sciences, but also expects to inspire students in their research design.
