{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T15:10:20Z","timestamp":1774019420331,"version":"3.50.1"},"reference-count":47,"publisher":"Wiley","issue":"39","license":[{"start":{"date-parts":[[2021,8,20]],"date-time":"2021-08-20T00:00:00Z","timestamp":1629417600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["21971019"],"award-info":[{"award-number":["21971019"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004826","name":"Natural Science Foundation of Beijing Municipality","doi-asserted-by":"publisher","award":["2202022"],"award-info":[{"award-number":["2202022"]}],"id":[{"id":"10.13039\/501100004826","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2021,9,20]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Over recent decades, guided by the anionic group theory of nonlinear optical (NLO) materials, rational design strategies have been primarily focused on anionic moieties; consequently, structural modification and design of cationic moieties have long been neglected. Herein, we report a strategy for the coordination of cationic moieties that substantially enhances the optical properties of NLO materials. For an example with well\u2010known crystal structure, [Ag(NH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>]<jats:sub>2<\/jats:sub>SO<jats:sub>4<\/jats:sub>, we demonstrate that the coordination of the Ag<jats:sup>+<\/jats:sup> cation by the neutral ligand drives the formation of a noncentrosymmetric tetragonal <jats:italic>P<\/jats:italic>\n2<jats:sub>1<\/jats:sub><jats:italic>c<\/jats:italic> structure as a positive uniaxial crystal. The bending of the [Ag(NH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>]<jats:sup>+<\/jats:sup> cationic moiety parallel to the <jats:italic>z<\/jats:italic>\u2010axis generates an anisotropic arrangement of the dipoles, i.e., a dipole of 0.12\u2005D along the <jats:italic>z<\/jats:italic>\u2010direction, yet zero dipole in the <jats:italic>xy<\/jats:italic>\u2010plane, which interacts anisotropically with the incident light oscillating electromagnetic wave, leading to optical anisotropy with a large birefringence. The incident beam of 589.3\u2005nm normal to the (110) crystal plane measures \u0394<jats:italic>n<\/jats:italic><jats:sub>obv.<\/jats:sub>=0.08, and [Ag(NH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>]<jats:sub>2<\/jats:sub>SO<jats:sub>4<\/jats:sub> also exhibits a phase\u2010matching NLO response 1.4 times that of KH<jats:sub>2<\/jats:sub>PO<jats:sub>4<\/jats:sub> (KDP) (<jats:italic>obv<\/jats:italic>. 1.4\u00d7KDP @1064\u2005nm; <jats:italic>cal. d<\/jats:italic><jats:sub>36<\/jats:sub>=1.50\u2005pm\u2009V<jats:sup>\u22121<\/jats:sup>).<\/jats:p>","DOI":"10.1002\/anie.202107780","type":"journal-article","created":{"date-parts":[[2021,7,16]],"date-time":"2021-07-16T02:57:15Z","timestamp":1626404235000},"page":"21216-21220","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":84,"title":["[Ag(NH<sub>3<\/sub>)<sub>2<\/sub>]<sub>2<\/sub>SO<sub>4<\/sub>: A Strategy for the Coordination of Cationic Moieties to Design Nonlinear Optical Materials**"],"prefix":"10.1002","volume":"60","author":[{"given":"Yi\u2010Chang","family":"Yang","sequence":"first","affiliation":[{"name":"Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University  Beijing 100875 P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xin","family":"Liu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Theoretical and Computational Photochemistry Ministry of Education College of Chemistry Beijing Normal University  Beijing 100875 P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Lu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Theoretical and Computational Photochemistry Ministry of Education College of Chemistry Beijing Normal University  Beijing 100875 P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8390-2138","authenticated-orcid":false,"given":"Li\u2010Ming","family":"Wu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Theoretical and Computational Photochemistry Ministry of Education College of Chemistry Beijing Normal University  Beijing 100875 P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3693-4193","authenticated-orcid":false,"given":"Ling","family":"Chen","sequence":"additional","affiliation":[{"name":"Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University  Beijing 100875 P. R. 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