Conjugated network polymers (CNPs) have gained considerable attention as heterogeneous photocatalysts, however, their limited solubility in solvents poses a significant challenge in employing CNPs for photoreactors. Herein, we report the chemical dissolution of CNPs in aminic solvents to enhance solution processability. The CNPs, synthesized via the Knoevenagel polycondensation, were dissolved into corresponding polymer inks, forming thin films on various substrates through mild heating. Residual functional groups on the CNP surface provided latent reactive sites for liquid amines, facilitating structural disentanglement and dissolution without hindering the π-conjugation. The resulting polymer films on FTO electrodes exhibited broader light absorbance and > 2-fold enhanced photoresponse compared to CNP powder films. Photocatalytic production of HO using the large-area polymer film (254.4 cm) demonstrated sustained activity with a production rate of 0.21 mM HO h over 14 h without sacrificial agents. These findings lay the groundwork for applying CNP photocatalysts in chemical, optical, and electronic applications.

中文翻译：

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从不溶到可加工：供体-受体共轭网络聚合物的胺溶剂溶解，用于制造光催化薄膜


共轭网络聚合物（CNP）作为非均相光催化剂受到了广泛关注，然而，它们在溶剂中的有限溶解度对将 CNP 用于光反应器提出了重大挑战。在此，我们报告了 CNP 在胺溶剂中的化学溶解，以增强溶液的可加工性。通过Knoevenagel缩聚合成的CNP被溶解到相应的聚合物墨水中，通过温和加热在各种基材上形成薄膜。 CNP 表面上的残留官能团为液体胺提供了潜在的反应位点，促进结构解缠结和溶解，而不阻碍 π 共轭。与 CNP 粉末薄膜相比，FTO 电极上所得的聚合物薄膜表现出更宽的光吸收率和 2 倍以上的增强光响应。使用大面积聚合物膜（254.4 cm）光催化生产 H2O 表现出持续的活性，在没有牺牲剂的情况下，14 小时内的生产速率为 0.21 mM H2O·h。这些发现为 CNP 光催化剂在化学、光学和电子应用中的应用奠定了基础。