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Rapid Commun."],"published-print":{"date-parts":[[2025,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Phenolic aerogels based on resorcinol\u2010formaldehyde (RF) are among the best thermally insulating materials. However, the hydrophilicity inherent to the free phenolic moiety of RF gels generally limits their actual range of applications. Prior efforts to render phenolic gels hydrophobic are restricted to post\u2010synthetic functionalizations of hydrophilic gels, processes that are often limited in efficiency, scope, and\/or longevity. Here, an acid\u2010mediated conversion of 1,3,5\u2010trimethoxybenzene with formaldehyde is reported, yielding monolithic trimethoxybenzene\u2010formaldehyde (TMBF) aerogels and xerogels with low density (0.11\u20130.30\u00a0g\u00a0cm\n                    <jats:sup>\u22123<\/jats:sup>\n                    ), high porosity (74\u201392\u00a0%), inner surface areas (\n                    <jats:italic>S<\/jats:italic>\n                    <jats:sub>BET<\/jats:sub>\n                    ) of up to 284\u00a0m\n                    <jats:sup>2<\/jats:sup>\n                    \u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    , and thermal conductivity of 34.5\u201343.9\u00a0mW\u00a0m\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u00a0K\n                    <jats:sup>\u22121<\/jats:sup>\n                    . For a monolithic xerogel based on TMBF xerogels an unprecedently low thermal conductivity\u00a0of 34.5\u00a0mW\u00a0m\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u00a0K\n                    <jats:sup>\u22121<\/jats:sup>\n                    could be achieved. In addition, all TMBF gels are thermally stable (degradation &gt;280\u2010310\u00a0\u00b0C) and highly hydrophobic (water contact angles 130\u00b0\u2013156\u00b0). As such, TMBF serves as a new class of inherently hydrophobic aerogels and xerogels and useful complement to RF materials.\n                  <\/jats:p>","DOI":"10.1002\/marc.202400691","type":"journal-article","created":{"date-parts":[[2024,9,30]],"date-time":"2024-09-30T11:39:16Z","timestamp":1727696356000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Hydrophobic Aerogels and Xerogels based on Trimethoxybenzene\u2010Formaldehyde"],"prefix":"10.1002","volume":"46","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3192-907X","authenticated-orcid":false,"given":"Thomas","family":"Anklam","sequence":"first","affiliation":[{"name":"Institute for Materials Research German Aerospace Center (DLR)  Linder H\u00f6he 51147 Cologne Germany"},{"name":"Institute of Inorganic Chemistry University of Cologne  Greinstrasse 4\u20136 50939 Cologne Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9484-8886","authenticated-orcid":false,"given":"Ren\u00e9","family":"Tannert","sequence":"additional","affiliation":[{"name":"Institute for Materials Research German Aerospace Center (DLR)  Linder H\u00f6he 51147 Cologne Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,9,30]]},"reference":[{"key":"e_1_2_7_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-3093(95)00069-0"},{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4419-7589-8_40"},{"key":"e_1_2_7_1_3","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4419-7589-8_38"},{"key":"e_1_2_7_1_4","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-030-27322-4_64"},{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1116\/1.575547"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01139044"},{"key":"e_1_2_7_2_3","first-page":"C433","volume":"50","author":"Pekala R. 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F.Baumann J. H.Satcher A. E.Gash The Regents of the University of California US7291653B2 2004 Surprisingly also the applicability of their base\u2010mediated protocol to alkylated resorcinol and phloroglucinol derivatives is claimed in the patent. We were however unable to reproduce the synthetic protocols reported therein for ethers."},{"key":"e_1_2_7_24_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.8b01657"},{"key":"e_1_2_7_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja010890y"},{"key":"e_1_2_7_26_1","doi-asserted-by":"publisher","DOI":"10.1002\/apmc.1973.050320101"},{"key":"e_1_2_7_26_2","unstructured":"b)K.Haagen Farbenfabriken Bayer Aktiengesellschaft US2692866 1954;"},{"key":"e_1_2_7_26_3","doi-asserted-by":"publisher","DOI":"10.5059\/yukigoseikyokaishi.66.705"},{"key":"e_1_2_7_26_4","doi-asserted-by":"publisher","DOI":"10.1295\/koron.66.331"},{"key":"e_1_2_7_27_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10847-009-9623-9"},{"key":"e_1_2_7_27_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.joc.5b00099"},{"key":"e_1_2_7_28_1","unstructured":"1 3 5\u2010Trimethoxybenzene >95% CAS RN: 621\u201023\u20108 ACR16055 rev. 5 Thermo Fisher Scientific https:\/\/www.fishersci.de\/shop\/products\/1\u20103\u20105\u2010trimethoxybenzene\u201099\u2010thermo\u2010scientific\/10562371 (accessed: Jan2024)."},{"key":"e_1_2_7_29_1","unstructured":"Resorcinol 98% CAS RN: 108\u201046\u20103 W358908\u201010KG rev. 7.7 Sigma\u2010Aldrich Chemie GmbH https:\/\/www.sigmaaldrich.com\/DE\/en\/sds\/aldrich\/w358908?userType=anonymous (accessed: April 2024)."},{"key":"e_1_2_7_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/0032-3861(81)90019-7"},{"key":"e_1_2_7_31_1","first-page":"3103","volume":"20","author":"Das B.","year":"2007","journal-title":"Thieme"},{"key":"e_1_2_7_32_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.tet.2012.04.014"},{"key":"e_1_2_7_32_2","doi-asserted-by":"publisher","DOI":"10.1039\/C5RA21801B"},{"key":"e_1_2_7_33_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10570-016-1091-y"},{"key":"e_1_2_7_34_1","unstructured":"A lack of equilibrium can be ruled out since increasing the respective equilibrium times in a control experiment did not alter the resulting isotherms (Figure S22a Supporting Information)."},{"key":"e_1_2_7_35_1","doi-asserted-by":"publisher","DOI":"10.1515\/pac-2014-1117"},{"key":"e_1_2_7_36_1","doi-asserted-by":"publisher","DOI":"10.1351\/pac198557040603"},{"key":"e_1_2_7_36_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4419-7589-8_21"},{"key":"e_1_2_7_37_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja01269a023"},{"key":"e_1_2_7_38_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja01145a126"},{"key":"e_1_2_7_39_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-030-27322-4_4"},{"key":"e_1_2_7_40_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0141-3910(96)00171-1"},{"key":"e_1_2_7_41_1","doi-asserted-by":"publisher","DOI":"10.1002\/adem.202100095"},{"key":"e_1_2_7_42_1","doi-asserted-by":"publisher","DOI":"10.1039\/C6SM01460G"},{"key":"e_1_2_7_43_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201709014"},{"key":"e_1_2_7_44_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-3093(90)90324-F"},{"key":"e_1_2_7_45_1","doi-asserted-by":"publisher","DOI":"10.1098\/rspa.1982.0088"}],"container-title":["Macromolecular Rapid Communications"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/marc.202400691","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/marc.202400691","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/marc.202400691","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T09:55:53Z","timestamp":1771062953000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/marc.202400691"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,9,30]]},"references-count":82,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2025,1]]}},"alternative-id":["10.1002\/marc.202400691"],"URL":"https:\/\/doi.org\/10.1002\/marc.202400691","archive":["Portico"],"relation":{},"ISSN":["1022-1336","1521-3927"],"issn-type":[{"value":"1022-1336","type":"print"},{"value":"1521-3927","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,9,30]]},"assertion":[{"value":"2024-08-29","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-09-30","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"2400691"}}