有机-无机杂化材料动力学与热力学转化以及荧光信息防伪应用研究——介绍一个综合化学实验

Research on Kinetic and Thermodynamic Transformations of Organic-Inorganic Hybrid Materials for Fluorescent Anti-Counterfeiting Application information:Introducing a Comprehensive Chemistry Experiment

有机-无机杂化发光材料易于调控的空间结构和发光性质,在发光防伪领域备受青睐。本实验基于Sb(Ⅲ)掺杂Bi(Ⅲ)基零维有机-无机杂化金属卤化物,利用不同的晶体生长方式实现动力学产物(化合物1)向热力学产物(化合物2)的转变,采用X-射线粉末衍射和荧光光度法分别对其进行了物相表征和光学性能测试,二者表现出截然不同的物相与光物理性质。化合物2在蒸馏水的作用下实现荧光淬灭,而且具有很强的反水性。基于化合物2出色的发光变色性质,制作了简易的可水写荧光信息防伪板/纸。本实验充分体现了“结构决定性质”的专业理论、“学以致用”的教学理念。该实验设计与实践旨在培养学生创新思维,提高其分析和解决实际问题的能力。

Organic-inorganic hybrid luminescent materials are highly favored in the luminescence anti-counterfeiting field due to their tunable structural and luminescent properties.This study investigates Sb(Ⅲ)doped Bi(Ⅲ)-based zerodimensional organic-inorganic hybrid metal halides,demonstrating the transformation from kinetic products(compound 1)to thermodynamic products(compound 2)by various crystal growth methods.X-ray powder diffraction and fluorescence spectroscopy were employed to characterize their phase and optical properties,revealing distinct differences between the two compounds.Compound 2 exhibits fluorescence quenching when exposed to distilled water and possesses robust hydrophobic properties,allowing for stable long-term storage in aqueous environments.Leveraging the exceptional color-changing properties of compound 2,a simple water-writable fluorescent anticounterfeiting board/paper was fabricated.This experiment exemplifies the principle that“structure determines properties”and embodies the educational philosophy of“learning through application”.The experimental design and implementation aim to cultivate students'innovative thinking and enhance their abilities to analyze and solve practical issues.