本文要點(diǎn)：

1. 將共價有機(jī)框架材料（COFs）工程化為兼具本征功能與工業(yè)化生產(chǎn)潛力的薄膜，一直是合成化學(xué)領(lǐng)域的重大挑戰(zhàn)。

2. 本研究通過開發(fā)骨架氮嗪-吡啶構(gòu)象，提出了一種高效合成框架，可在綠色常溫條件下將粉末狀COFs家族材料轉(zhuǎn)化為自聚合COFs薄膜。

3. 該氮嗪-吡啶框架中的活性質(zhì)子互變異構(gòu)現(xiàn)象不僅賦予材料熱致變色特性，更實(shí)現(xiàn)了大尺寸COFs薄膜（約10納米至30微米厚度）的自聚合制備，所得薄膜具有卓越的化學(xué)穩(wěn)定性、工業(yè)化加工性能和機(jī)械強(qiáng)度。

4. 尤為突出的是，基于氮嗪-吡啶的COFs首次展現(xiàn)出多重新穎特性：對Au3?→Au?和Cr??→Cr3?離子的還原容量分別高達(dá)1913與624 mg g?1、99.9%的紫外-藍(lán)光屏蔽率與97.2%的可見光透過率、以及鋅電池壽命提升10倍。

5. 預(yù)期該氮嗪-吡啶合成框架將成為推動網(wǎng)狀化學(xué)、環(huán)境科學(xué)和納米電子學(xué)發(fā)展的普適性路徑。

Figure 1.Synthesis of Azine-Pyridine frame induced COFs family and industrialized self-polymerization of tunable AP-COFs films.

Figure 2.Experimental and simulated PXRD patterns of A)TG-mDFP, B) TG-oOBPy, C)TG-oMBPy and D) TG-pDFP AP-COFs powders. Insets display the simulated structures of corresponding AP-COFs along top and side views. To render detailed structures of AP-COFs, optimal unit cell parameters are also shown in insets.

Figure 3.Temperature-dependent molecular structure analysis of AP-COFs. A, B)Raman spectral variances of representative TG-mDFP APCOFs from 30 to 120°C and from 120 to 30°C, respectively. Insets in A) and B) show magnified region from 1530 to 1480 cm?1 of the Raman spectra to elaborate the reversible skeleton transformation. C) Temperature-dependent FT-IR spectra of TG-mDFP AP-COFs from 20 to 120°C. An inset shows the difference spectra in the region of 1600 to 1450 cm?1. Intensity changes at 1617 cm?1 and 1505 cm?1 due to C=N and N=N stretching modes, respectively, confirmed the new chromophore formed in the skeleton of TG-mDFP AP-COFs. D) Temperature-dependent calculated ratios (I1280 / I1318 and I 1505 / I1617) of FT-IR absorbances from 20 to 120°C.

Figure 4.Skeletal proton transfer for the thermochromism of AP-COFs.

Figure 5.Crystal structure, industrializable and mechanical performances of self-polymerized AP-COF films.

Figure 6.Applications of AP-COFs films on heavy metal ion recovery and battery performance enhancement.

https://doi.org/10.1002/anie.202509221

(來源：網(wǎng)絡(luò) 版權(quán)屬原作者 謹(jǐn)致謝意）