A Bi-CP-based solid-state thin-film sensor: Preparation and luminescence sensing for bioamine vapors
【无机化学学报】doi: 10.11862/CJIC.20240134
A 1D coordination polymer (CP), (TBA) [Bi(bp4do)Br4] (1), was synthesized by the assembly of 4, 4' - bipyridine -N, N'-dioxide (bp4do) and Bi3+ (TBA+=tetrabutylammonium). 1 exhibits a red luminescence with a quantum yield of up to 69%. A solid-state thin-film sensor (1/PVP) with extremely high luminescence stability was prepared by combining 1 with polyvinyl pyrrolidone (PVP). 1/PVP has a wide - range sensing capability for 11 NH3/amine vapors with rapid response. During the sensing process, its luminescence color changed from red to blue, which was easy for naked -eye observation. The sensing mechanism is NH3/amine-induced collapse of the framework of 1. Furthermore, 1/PVP has been successfully applied to monitoring food freshness such as meat/aquatic products.
【大学化学】doi: 10.12461/PKU.DXHX202503052
化工原理课程是化工类及相近专业的一门非常重要的专业核心必修课,该课程在培养化工类及相近专业学生的理论基础、工程实践能力与创新思维方面起到举足轻重的作用。针对化工原理课程教学存在的痛点问题,课程组采取“以生为本、交叉融合、数智赋能、知行融拓”教学理念,通过融合跨学科教学内容、扩充多维度教学资源、构建四层次递进教学模式、采用“问题项目+AI虚拟组员”教学方法、提升评价维度、延伸评价深度等方法开展课程教学创新。通过改革实践,学生学习积极性和课程认同感提升、工程思维树立、创新能力提升,从根本上提高化工原理课程体系的教学质量,利于培养兼备创新思维和扎实工程实践技能的未来工程师。
【大学化学】doi: 10.12461/PKU.DXHX202504026
结构色是一种由微纳结构对光调控光反射和干涉形成的色彩,广泛存在于自然界中,如蝴蝶翅膀、鸟类羽毛等。相比传统色素,结构色具有更高的稳定性和环保性,因此在防伪、光学传感和仿生材料等领域具有广泛应用。本研究以温度响应性的微凝胶为研究对象,通过其可控合成及胶体晶体的自组装过程,系统性地引导学生探究结构色的形成机理与调控规律。实验采用乳液自由基聚合法制备单分散性良好的交联微凝胶,该微凝胶具有显著的温敏特性,可通过调节温度等参数实现溶液中微凝胶的可控自组装。教学实践将材料合成、结构表征与光学性能测试有机结合,并融入生动的科普展示,可有效激发学生的研究兴趣,培养学生的科学思维和创新能力。
