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However, developing advanced hydrogel systems that simultaneously achieve efficient solar\u2010thermal conversion and comprehensive pollutant removal remains challenging. This work reports the synthesis of three novel conjugated polymers through molecular engineering of diketopyrrolopyrrole with modified benzo[1,2\u2010\n                    <jats:italic>c<\/jats:italic>\n                    :4,5\u2010\n                    <jats:italic>c<\/jats:italic>\n                    \u2032]bis[1,2,5]thiadiazole derivatives to enhance electron\u2010withdrawing characteristics. The optimized molecular structures exhibit extended light absorption and minimized radiative decay through synergistic intramolecular charge transfer and controlled molecular motion in the aggregated state. Among them, PDPP\u2010SeQ achieves a remarkable photothermal conversion efficiency of 26.71% under standard solar illumination. By incorporating PDPP\u2010SeQ micelles into a polyethylenimine\/polyvinyl alcohol matrix, we fabricated a multifunctional solar\u2010absorbing hydrogel (SAG\u2010Se). The composite demonstrates exceptional performance, including a record water production rate of 10.18\u00a0kg\/m\n                    <jats:sup>2<\/jats:sup>\n                    \u00b7h with excellent cycling stability, representing the highest reported value among organic photothermal systems. Notably, the design enables concurrent freshwater and electricity generation (55\u00a0mV output) without sacrificing evaporation efficiency. The resulting SAG\u2010Se purification platform combines portability with robust treatment capabilities, effectively eliminating contaminants. This study provides fundamental insights into molecular design principles for high\u2010efficiency photothermal materials while demonstrating their practical application in integrated water\u2010energy systems for remote regions.\n                  <\/jats:p>","DOI":"10.1002\/smll.73294","type":"journal-article","created":{"date-parts":[[2026,4,3]],"date-time":"2026-04-03T08:26:55Z","timestamp":1775204815000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Quinoxaline\u20106,7\u2010dicarboxylate\u2010based Photothermal Polymers Inspired Multifunctional Hydrogels for High\u2010Efficient Solar\u2010Driven Water Purification"],"prefix":"10.1002","volume":"22","author":[{"given":"Shizhang","family":"Li","sequence":"first","affiliation":[{"name":"Institute of Flexible Electronics (IFE) Northwestern Polytechnical University  Xi'an China"},{"name":"Key Laboratory of Forest Plant Ecology Ministry of Education, Engineering 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