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However, synthesizing supports with specific electronic environments and well-defined pores to prevent aggregation remains challenging. Here, we report a facile palladium\/copper cocatalyzed polycondensation to synthesize carbon-rich acetylenic nanostructures, poly(1,3,5-triethynylbenzene) (PTEB), for the in situ chelation of ultrafine Pd nanoclusters (\u223c0.4 nm). The extensive \u03c0-conjugated configuration of PTEB provides an electron-rich environment that enhances Pd coordination through charge transfer, while its intrinsic pore structures ensure exceptional Pd dispersibility and effective spatial confinement. This synergistic electronic and spatial design in Pd\/PTEB catalysts exhibits impressive catalytic activities in liquid-phase reactions, achieving a remarkable turnover frequency of 15\u202f039 molC=C molPd\u20131 h\u20131 in the semihydrogenation of 1-octyne and a rate constant of 2.26 \u00d7 107 min\u20131 gPd\u20131 for 4-nitrophenol reduction. These performances represent a significant improvement over commercial and previously reported Pd catalysts, demonstrating promising advances for stable and active heterogeneous catalysts.<\/jats:p>","DOI":"10.1021\/acs.nanolett.6c02168","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T14:02:24Z","timestamp":1786370544000},"page":"10707-10714","source":"Crossref","is-referenced-by-count":0,"title":["Electron-Rich\nAcetylenic Nanostructures with\n                    <i>In Situ<\/i>\n                    Chelated Ultrafine\nPalladium Nanoclusters for Efficient\nLiquid-Phase Reaction Catalyst"],"prefix":"10.1021","volume":"26","author":[{"given":"Xinyu","family":"Su","sequence":"first","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-4657-8590","authenticated-orcid":true,"given":"Feng","family":"Yu","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Houhong","family":"Song","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiang","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Metal Research, Chinese Academy of Sciences , , ,","place":["Shenyang, China, 110016"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shengen","family":"Qiu","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhibo","family":"Liu","sequence":"additional","affiliation":[{"name":"Institute of Metal Research, Chinese Academy of Sciences , , ,","place":["Shenyang, China, 110016"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5660-5269","authenticated-orcid":true,"given":"Siyu","family":"Yao","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gaorong","family":"Han","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4997-8870","authenticated-orcid":true,"given":"Wencai","family":"Ren","sequence":"additional","affiliation":[{"name":"Institute of Metal Research, Chinese Academy of Sciences , , ,","place":["Shenyang, China, 110016"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zongping","family":"Chen","sequence":"additional","affiliation":[{"name":"Shenzhen University of Advanced Technology , , ,","place":["Shenzhen, China, 518107"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3885-2703","authenticated-orcid":true,"given":"Xinliang","family":"Feng","sequence":"additional","affiliation":[{"name":"Dresden University of Technology , , ,","place":["Dresden, Germany, 01062"]},{"name":"Max Planck Institute of Microstructure Physics , Weinberg 2 , ,","place":["Halle, Germany, 06120"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,8,10]]},"reference":[{"key":"2026081910195603600_cit1","doi-asserted-by":"publisher","first-page":"28","DOI":"10.1021\/cr500208k","article-title":"Multimetallic Catalysis Based on\nHeterometallic Complexes and Clusters","volume":"115","author":"Buchwalter","year":"2015","journal-title":"Chem.\nRev."},{"key":"2026081910195603600_cit2","doi-asserted-by":"publisher","first-page":"4981","DOI":"10.1021\/acs.chemrev.7b00776","article-title":"Metal Catalysts for\nHeterogeneous Catalysis: From Single Atoms to\nNanoclusters and Nanoparticles","volume":"118","author":"Liu","year":"2018","journal-title":"Chem. 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