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Here, two different, cationic ruthenium complexes facilitated the conversion of 3D LHPs to the desired low\u2010D variants. [Ru(bpy)\n                    <jats:sub>2<\/jats:sub>\n                    (4,4'\u2010dinonyl\u20102,2'\u2010bpy)]\n                    <jats:sup>2+<\/jats:sup>\n                    (RBN) produces 2D lead halides and [Ru(bpy)\n                    <jats:sub>2<\/jats:sub>\n                    (4,4'\u2010dimethyl\u20102,2'\u2010bpy)]\n                    <jats:sup>2+<\/jats:sup>\n                    (RBM) generates 1D\/2D heterostructures via stacking of 0D Cs\n                    <jats:sub>4<\/jats:sub>\n                    PbBr\n                    <jats:sub>6<\/jats:sub>\n                    nanodiscs. Femtosecond transient absorption spectroscopy indicates efficient photoinduced charge stabilization and establishes the Ru\u2010complex\u2010induced low\u2010D LHP variants as promising photocatalytic platforms to sustain high\u2010energy carriers. These are prerequisites for generating catalytic substrates to reduce CO\n                    <jats:sub>2<\/jats:sub>\n                    and H\n                    <jats:sup>+<\/jats:sup>\n                    . Practically, the 1D\/2D heterostructures show exceptional CO\n                    <jats:sub>2<\/jats:sub>\n                    reduction to CO with very good generation efficiency (rate: 243.6\u00a0\u00b5mol\u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    \u00a0h\n                    <jats:sup>\u22121<\/jats:sup>\n                    ), which is \u223c8.7\u2010fold higher compared to the higher dimensional LHPs, due to larger surface area, long diffusion length and pronounced electron transfer. RBN, with a nonyl chain, has specific directional properties that control the growth of the 2D LHP sheet, and RBM (methyl appended) produces the 1D variants via 0D hexagonal nanostructure formation.\n                  <\/jats:p>","DOI":"10.1002\/smtd.71074","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T13:38:27Z","timestamp":1790689107000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ligand\u2010Engineered Ru(II) Complexes Direct 1D\/2D Halide Perovskite Heterostructure Formation for Efficient CO\n                    <sub>2<\/sub>\n                    Reduction"],"prefix":"10.1002","author":[{"given":"Mallika","family":"Mukherjee","sequence":"first","affiliation":[{"name":"Department of Chemical Sciences and Center for Advanced Functional Materials Indian Institute of Science Education and Research (IISER) Kolkata  Kolkata 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