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It is previously reported that chemical polymerization using iodine as an oxidant enables the synthesis of amorphous\n                    <jats:bold>POP<\/jats:bold>\n                    s without impurities. In this study, an iodine\u2010based chemical polymerization method is employed to maximize the specific surface area of polytriphenylamine, a typical amorphous\n                    <jats:bold>POP<\/jats:bold>\n                    . Furthermore, 1,3,5\u2010tris[4\u2010(diphenylamino)phenyl]benzene, a monomer with three triphenylamine moieties connected by a benzene core, is used to increase the number of reaction points and construct a rigid structure. The resulting poly[1,3,5\u2010tris[4\u2010(diphenylamino)phenyl]benzene] (\n                    <jats:bold>pTTPA<\/jats:bold>\n                    ) exhibited a high specific surface area. Using 200 equivalents of iodine resulted in a\n                    <jats:bold>pTTPA<\/jats:bold>\n                    with the largest Brunauer\u2013Emmett\u2013Teller (\n                    <jats:bold>BET<\/jats:bold>\n                    ) specific surface area (2134.6\u00a0m\n                    <jats:sup>2<\/jats:sup>\n                    \u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) among previously reported triphenylamine\u2010based amorphous\n                    <jats:bold>POP<\/jats:bold>\n                    s, and demonstrated a high CO\n                    <jats:sub>2<\/jats:sub>\n                    adsorption capacity (3.31\u00a0mmol\u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 25\u00a0\u00b0C). Furthermore,\n                    <jats:bold>pTTPA<\/jats:bold>\n                    exhibited significant water\u2013vapor adsorption when the\n                    <jats:bold>BET<\/jats:bold>\n                    specific surface area reached 1500 m\n                    <jats:sup>2<\/jats:sup>\n                    \u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    , leading to the emergence of proton conductivity (e.g., 4.33 \u00d7 10\n                    <jats:sup>\u22126<\/jats:sup>\n                    S cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 95% RH and 90\u00a0\u00b0C). The findings demonstrate that iodine\u2010based chemical polymerization enables the maximization of the porosity of amorphous\n                    <jats:bold>POP<\/jats:bold>\n                    s and the development of proton conductivity within them.\n                  <\/jats:p>","DOI":"10.1002\/smll.202410794","type":"journal-article","created":{"date-parts":[[2025,2,17]],"date-time":"2025-02-17T10:26:21Z","timestamp":1739787981000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Triphenylamine\u2010Based Porous Organic Polymers with High Porosity: their High Carbon\u2010Dioxide Adsorption and Proton\u2010Conductivity Emergence"],"prefix":"10.1002","volume":"21","author":[{"given":"Kohei","family":"Okubo","sequence":"first","affiliation":[{"name":"Institute of Multidisciplinary Research for Advanced Materials Tohoku University  2\u20101\u20101 Katahira, Aoba\u2010ku Sendai Miyagi 980\u20108577 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Research Center Ibaraki University  4\u201012\u20101 Nakanarusawa Hitachi Ibaraki 316\u20108511 Japan"},{"name":"Deuterium Science Research Unit Center for the Promotion of Interdisciplinary Education and Research Kyoto University  Yoshida Sakyo\u2010ku Kyoto 606\u20108501 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