A unique 3D luminescent metal-organic framework, namely [Cd(L)(H₂O)_0.5]·DMF·2.5H₂O (1), where H₂L=3-(tetrazol-5-yl)triazole, has been successfully prepared and characterized. The framework has demonstrated excellent luminescence properties and structural stability in the water system. Notably, the luminescence intensity of 1 was significantly quenched by Cr(Ⅵ) (1 mL of Cr₂O₇^2- or 150 μL of CrO₄^2-, 1 mmol·L^-1), leading to the formation of an "on-off" luminescence silencing system (Cr₂O₇^2-@1), which was capable of accurately detecting Cr(Ⅵ) in the water system. The primary mechanism responsible for luminescence quenching was the Forster resonance energy transfer (FRET) process. Additionally, by removing the involvement of the FRET process, the luminescence intensity of the Cr₂O₇^2-@1 system could be restored, allowing for the highly selective and sensitive detection of ascorbic acid (AA) in water systems. Moreover, it has been demonstrated that 1 can successfully detect AA in vitamin C tablets, yielding recovery rates ranging from 98.20% to 103.33% and relative standard deviations (RSDs) ranging from 1.78% to 3.42%. Based on the findings of this experiment, a luminescent "IMPLICATION" molecular logic gate has been constructed utilizing AA and Cr(Ⅵ) as the chemical inputs, respectively.

“荧光海”是指在夜晚或黑暗环境中，海水表面发蓝光的景象，又称“蓝眼泪”。本科普实验着眼于引导人们了解该有趣自然现象，探究背后的科学原理，以智能缓释材料海藻多糖水凝胶包埋发光原料，根据化学发光能量转移原理制备可持续发光的多彩藻胶球，并基于此推出一种便携科普实验盒，可随时随地重现属于自己的澎湃“蓝眼泪”。本科普实验将糖化学、光化学和材料化学知识应用于自然现象的解读与应用，向公众充分展现浪漫美妙的化学科学。