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These compounds crystallize in the noncentrosymmetric (NCS) space group,\n                    <jats:italic>R<\/jats:italic>\n                    32, and are composed of distorted octahedral [CdX\n                    <jats:sub>3<\/jats:sub>\n                    F\n                    <jats:sub>3<\/jats:sub>\n                    ] (X\u2550Cl or Br) units, which extend into a 3D framework. Remarkably, both compounds demonstrate strong second\u2010harmonic generation (SHG) efficiencies\u20143.0 and 8.0 times that of KH\n                    <jats:sub>2<\/jats:sub>\n                    PO\n                    <jats:sub>4<\/jats:sub>\n                    for the Cl\u2010 and Br\u2010containing analogs, respectively\u2014with phase\u2010matching behavior observed. The SHG efficiency is attributed to the highly distorted coordination environment of the polarizable d\n                    <jats:sup>10<\/jats:sup>\n                    Cd\n                    <jats:sup>2+<\/jats:sup>\n                    ions, with (NH\n                    <jats:sub>4<\/jats:sub>\n                    )\n                    <jats:sub>2<\/jats:sub>\n                    Cd\n                    <jats:sub>2<\/jats:sub>\n                    Br\n                    <jats:sub>3<\/jats:sub>\n                    F\n                    <jats:sub>3<\/jats:sub>\n                    benefiting further from Br's greater polarizability. Furthermore, these compounds exhibit wide bandgaps exceeding 4.2\u00a0eV, making them the first d\n                    <jats:sup>10<\/jats:sup>\n                    metal mixed halide systems incorporating fluoride that are suitable for UV NLO applications. With UV absorption cut\u2010off edges as short as 203\u00a0nm for (NH\n                    <jats:sub>4<\/jats:sub>\n                    )\n                    <jats:sub>2<\/jats:sub>\n                    Cd\n                    <jats:sub>2<\/jats:sub>\n                    Cl\n                    <jats:sub>3<\/jats:sub>\n                    F\n                    <jats:sub>3<\/jats:sub>\n                    and 243\u00a0nm for (NH\n                    <jats:sub>4<\/jats:sub>\n                    )\n                    <jats:sub>2<\/jats:sub>\n                    Cd\n                    <jats:sub>2<\/jats:sub>\n                    Br\n                    <jats:sub>3<\/jats:sub>\n                    F\n                    <jats:sub>3<\/jats:sub>\n                    , these materials represent a significant advancement in the development of UV\u2010transparent NLO materials. This study introduces a novel synthetic strategy for the design of d\n                    <jats:sup>10<\/jats:sup>\n                    mixed halide systems with enhanced optical properties, offering promising candidates for future UV NLO technologies.\n                  <\/jats:p>","DOI":"10.1002\/advs.202414503","type":"journal-article","created":{"date-parts":[[2025,1,28]],"date-time":"2025-01-28T12:55:26Z","timestamp":1738068926000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["(NH\n                    <sub>4<\/sub>\n                    )\n                    <sub>2<\/sub>\n                    Cd\n                    <sub>2<\/sub>\n                    Cl\n                    <sub>3<\/sub>\n                    F\n                    <sub>3<\/sub>\n                    and (NH\n                    <sub>4<\/sub>\n                    )\n                    <sub>2<\/sub>\n                    Cd\n                    <sub>2<\/sub>\n                    Br\n                    <sub>3<\/sub>\n                    F\n                    <sub>3<\/sub>\n                    : The First Fluoride\u2010Containing d\n                    <sup>10<\/sup>\n                    Metal Mixed Halides Exhibiting Superior Ultraviolet Nonlinear Optical Properties"],"prefix":"10.1002","volume":"12","author":[{"given":"Seunghun","family":"Choi","sequence":"first","affiliation":[{"name":"Department of Chemistry Sogang University  35 Baekbeom\u2010ro, Mapo\u2010gu Seoul 04107 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Chemistry Sogang University  35 Baekbeom\u2010ro, Mapo\u2010gu Seoul 04107 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunseung","family":"Kuk","sequence":"additional","affiliation":[{"name":"Department of Chemistry Sogang University  35 Baekbeom\u2010ro, Mapo\u2010gu Seoul 04107 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7195-9089","authenticated-orcid":false,"given":"Kang Min","family":"Ok","sequence":"additional","affiliation":[{"name":"Department of Chemistry Sogang University  35 Baekbeom\u2010ro, Mapo\u2010gu Seoul 04107 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,1,28]]},"reference":[{"key":"e_1_2_7_1_1","doi-asserted-by":"publisher","DOI":"10.1039\/b511119f"},{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.253.5017.281"},{"key":"e_1_2_7_1_3","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.5b03986"},{"key":"e_1_2_7_1_4","doi-asserted-by":"publisher","DOI":"10.1039\/D1TC04498B"},{"key":"e_1_2_7_1_5","doi-asserted-by":"publisher","DOI":"10.1039\/D1QI00214G"},{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202301420"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1039\/D2QM00983H"},{"key":"e_1_2_7_2_3","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.0c00702"},{"key":"e_1_2_7_3_1","first-page":"235","volume":"28","author":"Chen C.","year":"1985","journal-title":"Sci. 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