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Strong hydrogen\u2010bonding interactions at the interlayer between AMBA molecules impose structural rigidity that prevents the formation of continuous metal\u2010halide layers, instead generating isolated linear islands of three edge\u2010sharing [PbBr\n                    <jats:sub>6<\/jats:sub>\n                    ]\n                    <jats:sup>4<\/jats:sup>\n                    <jats:sup>\u2212<\/jats:sup>\n                    octahedra (Pb\n                    <jats:sub>3<\/jats:sub>\n                    Br\n                    <jats:sub>14<\/jats:sub>\n                    ). The anisotropic in\u2010plane arrangement of the structure is confirmed by angle\u2010resolved polarized Raman spectroscopy, which reveals directional vibrational modes aligned with the octahedral island orientation. Despite the discontinuous lattice, transient photoluminescence microscopy demonstrates efficient in\u2010plane exciton transport. Transport is strongly anisotropic, with the diffusion coefficient along the\n                    <jats:italic>c<\/jats:italic>\n                    \u2010axis (0.149\u00a0cm\n                    <jats:sup>2<\/jats:sup>\n                    \/s) exceeding that along the\n                    <jats:italic>a<\/jats:italic>\n                    \u2010axis (0.042\u00a0cm\n                    <jats:sup>2<\/jats:sup>\n                    \/s) by over threefold. This anisotropy is attributed to preferential near\u2010field resonant energy transfer between the anisotropically oriented islands, as confirmed by numerical simulations, offering an efficient alternative transport mechanism in discontinuous layered perovskites.\n                  <\/jats:p>","DOI":"10.1002\/adma.75282","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T09:41:18Z","timestamp":1791452478000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Efficient in\u2010Plane Exciton Transport in a Discontinuous Layered Lead\u2010Bromide Perovskite"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4647-6886","authenticated-orcid":false,"given":"Raquel","family":"Utrera\u2010Melero","sequence":"first","affiliation":[{"name":"Condensed Matter Physics Center (IFIMAC) Universidad Aut\u00f3noma de Madrid  Madrid Spain"},{"name":"Department of Condensed Matter Physics Universidad Aut\u00f3noma de Madrid  Madrid Spain"},{"name":"Instituto Madrile\u00f1o De Estudios Avanzados (IMDEA) Nanociencia Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonella","family":"Cutrupi","sequence":"additional","affiliation":[{"name":"Condensed Matter Physics Center (IFIMAC) Universidad Aut\u00f3noma de Madrid  Madrid Spain"},{"name":"Department of Condensed Matter Physics Universidad Aut\u00f3noma de Madrid  Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1984-7183","authenticated-orcid":false,"given":"Ivan","family":"Rivilla","sequence":"additional","affiliation":[{"name":"IKERBASQUE Basque Foundation for Science  Bilbao Spain"},{"name":"Donostia International Physics Center BERC Basque Excellence Research Centre  Donostia\u2010San Sebasti\u00e1n Spain"},{"name":"Departamento De Qu\u00edmica Org\u00e1nica I and Centro de Innovaci\u00f3n y Qu\u00edmica Avanzada (ORFEO\u2010CINQA) Facultad De Qu\u00edmica\/Kimika Fakultatea Universidad del Pa\u00eds Vasco\/Euskal Herriko Unibertsitatea (UPV\/EHU)  Donostia\u2010San Sebasti\u00e1n Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6074-957X","authenticated-orcid":false,"given":"Davide","family":"Spirito","sequence":"additional","affiliation":[{"name":"BCMaterials \u2013 Basque Center For Materials Applications and Nanostructures UPV\/EHU Science Park  Leioa Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9647-6406","authenticated-orcid":false,"given":"E. Carolina","family":"Sa\u00f1udo","sequence":"additional","affiliation":[{"name":"Institut De Nanoci\u00e8ncia i Nanotecnologia Universitat de Barcelona (IN2UB) Universitat de Barcelona  Barcelona Spain"},{"name":"Departament de Qu\u00edmica Inorg\u00e0nica i Org\u00e0nica Secci\u00f3 de Qu\u00edmica Inorg\u00e0nica Universitat de Barcelona  Barcelona Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9926-3833","authenticated-orcid":false,"given":"Juan","family":"Cabanillas\u2010Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Instituto Madrile\u00f1o De Estudios Avanzados (IMDEA) Nanociencia Madrid Spain"},{"name":"Unidad de Nanomateriales Avanzados IMDEA\u2010Nanociencia, Unidad Asociada al CSIC por el ICMM  Madrid Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8082-395X","authenticated-orcid":false,"given":"Antonio 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