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Here, we report an unconventional \u201c\u03c0\u2010contraction\u201d strategy that excises the peripheral benzene rings from metallophthalocyanine (MPc) to afford contracted metalloporphyrazine (MPz) ligands (M\u00a0=\u00a0Co, Ni). Trimming decreases \u03c0\u2010electron density on the carbon framework and directs charge to the metal center, thereby reshaping its electronic structure. In CoPz\u2013MOF, this contraction uniquely induces a high\u2010spin Co 3d station and stabilizes mixed Co(I)\/Co(II) valence states\u2014features absent in CoPc MOF and Ni\u2010based analogues. DFT calculations confirm that the high\u2010spin configuration confers the strongest oxygen adsorption affinity among the series, while the presence of Co(I) species further promotes O\n                    <jats:sub>2<\/jats:sub>\n                    chemisorption during the onset stage of ORR. Electrochemically, CoPz\u2013MOF delivers a half\u2010wave potential of 0.84\u00a0V with a preferential four\u2010electron pathway, outperforming its counterparts. In zinc\u2013air batteries, it achieves a peak power density of 125.6\u00a0mW\u00a0cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    and stable operation over 500\u00a0h. This work establishes ligand\u2010level conjugation engineering\u2014rather than node\u2010metal substitution\u2014as a powerful strategy for tailoring metal\u2010center electronic structures in c\u2010MOF electrocatalysts.\n                  <\/jats:p>","DOI":"10.1002\/anie.1652124","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T15:11:30Z","timestamp":1789398690000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["\u03c0\u2010Contraction Induces High\u2011Spin Co Centers in 2D Conductive MOFs for Efficient Oxygen Reduction"],"prefix":"10.1002","author":[{"given":"Xue","family":"Liu","sequence":"first","affiliation":[{"name":"Shandong Key Laboratory of Intelligent Energy Materials School of Materials Science and Engineering China University of Petroleum (East China)  Qingdao 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