{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["11(5)"],"submitter":["Takashima I"],"pubmed_abstract":["Next-generation polymer electrolyte fuel cells (PEFCs) require polymer electrolyte membranes (PEMs) capable of operating at temperatures above the boiling point of water (100 °C) and under low-humidity below 40% RH. In this study, we synthesized poly-(8-(<i>p</i>-styryl)-1-octanephosphonic acid) (soPA), a polymer bearing phosphonic acid groups on the side chains connected via eight-carbon alkylene spacers. soPA was insoluble in water and formed a highly oriented lamellar phase-separated nanostructure with a 2.9 nm domain spacing, consisting of a hydrophobic phase formed by the alkylene spacers and the polystyrene backbone, and a hydrophilic phase containing the phosphonic acid groups. Despite its lower acid group density compared with poly-(4-(<i>p</i>-styryl)-1-butanephosphonic acid) (sbP"],"journal":["ACS omega"],"pagination":["8272-8282"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12902858"],"repository":["biostudies-literature"],"pubmed_title":["Long Alkylene Spacers Promote Structural Ordering and Proton Transport in Phosphonic Acid-Based Polymer Electrolyte Membranes."],"pmcid":["PMC12902858"],"pubmed_authors":["Kajita T","Tanaka H","Takashima I","Nakayama T","Nishimoto M","Noro A"],"additional_accession":[]},"is_claimable":false,"name":"Long Alkylene Spacers Promote Structural Ordering and Proton Transport in Phosphonic Acid-Based Polymer Electrolyte Membranes.","description":"Next-generation polymer electrolyte fuel cells (PEFCs) require polymer electrolyte membranes (PEMs) capable of operating at temperatures above the boiling point of water (100 °C) and under low-humidity below 40% RH. In this study, we synthesized poly-(8-(<i>p</i>-styryl)-1-octanephosphonic acid) (soPA), a polymer bearing phosphonic acid groups on the side chains connected via eight-carbon alkylene spacers. soPA was insoluble in water and formed a highly oriented lamellar phase-separated nanostructure with a 2.9 nm domain spacing, consisting of a hydrophobic phase formed by the alkylene spacers and the polystyrene backbone, and a hydrophilic phase containing the phosphonic acid groups. Despite its lower acid group density compared with poly-(4-(<i>p</i>-styryl)-1-butanephosphonic acid) (sbP","dates":{"release":"2026-01-01T00:00:00Z","publication":"2026 Feb","modification":"2026-07-15T15:39:36.043Z","creation":"2026-07-06T03:11:32.958Z"},"accession":"S-EPMC12902858","cross_references":{"pubmed":["41696346"],"doi":["10.1021/acsomega.5c10883"]}}