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However, current organic optoelectronic materials still suffer from limited functionality and the low atom economy of conventional synthesis methods (such as Suzuki and Stille couplings). Herein, two isomeric organic conjugated molecules,\n                    <jats:italic>p<\/jats:italic>\n                    \u2010Ph2FTT and\n                    <jats:italic>o<\/jats:italic>\n                    \u2010Ph2FTT, employing noncovalent conformational locks with excellent planarity are first developed via an eco\u2010friendly, tin\u2010free direct C\u2500H activation strategy. Due to the different fluorine substitution positions on the benzene ring, the\n                    <jats:italic>p<\/jats:italic>\n                    \u2010Ph2FTT molecule exhibits superior planarity compared with\n                    <jats:italic>o<\/jats:italic>\n                    \u2010Ph2FTT, resulting in superior charge transport performance in OFETs. Employing\n                    <jats:italic>p<\/jats:italic>\n                    \u2010Ph2FTT as a photosensitizer, the fabricated\n                    <jats:italic>p<\/jats:italic>\n                    \u2010Ph2FTT\/PDVT\u201010 synaptic transistor exhibits distinct synaptic responses under blue light stimulation, demonstrating excellent synaptic plasticity and a remarkable photosensitivity of 6.7 \u00d7 10\n                    <jats:sup>4<\/jats:sup>\n                    . Furthermore, an artificial neural network constructed by this transistor achieves an overall recognition accuracy of 92.84% for handwritten digits. This investigation establishes a paradigm for the green synthesis of multifunctional molecular materials, facilitating the integration of eco\u2010friendly chemistry and high\u2010performance electronics for neuromorphic computing.\n                  <\/jats:p>","DOI":"10.1002\/smll.75099","type":"journal-article","created":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T06:31:54Z","timestamp":1786516314000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["C\u2500H Arylation\u2010Derived Organic Conjugated Molecules for Optoelectronic Synaptic Transistors"],"prefix":"10.1002","volume":"22","author":[{"given":"Yiyu","family":"Chen","sequence":"first","affiliation":[{"name":"Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Hu","sequence":"additional","affiliation":[{"name":"Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingpeng","family":"Wu","sequence":"additional","affiliation":[{"name":"Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi","family":"Zhao","sequence":"additional","affiliation":[{"name":"Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zechen","family":"Liang","sequence":"additional","affiliation":[{"name":"Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7908-9874","authenticated-orcid":false,"given":"Laju","family":"Bu","sequence":"additional","affiliation":[{"name":"School of Chemistry Xi'an Jiaotong University  Xi'an China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7829-7308","authenticated-orcid":false,"given":"Guanghao","family":"Lu","sequence":"additional","affiliation":[{"name":"Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University  Xi'an China"},{"name":"Laodong Guangdian Co. 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