{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T04:11:27Z","timestamp":1792642287671,"version":"4.5.0"},"reference-count":69,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2025,8,8]],"date-time":"2025-08-08T00:00:00Z","timestamp":1754611200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,8,8]],"date-time":"2025-08-08T00:00:00Z","timestamp":1754611200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemPlusChem"],"published-print":{"date-parts":[[2025,10,9]]},"abstract":"<jats:p>\n                    The nonlinear optical properties of aza\u2010borondipyrromethene (aza\u2010BODIPY) derivatives modified with 4\u2010methoxyphenyl, 2,4\u2010dimethoxyphenyl, and 4\u2010N,N\u2010diphenylaminophenyl groups at the 1 and 7 positions of the core structure are evaluated. The effects of substituents and solvent polarity (tetrahydrofuran (THF) and chloroform (CHCl\n                    <jats:sub>3)<\/jats:sub>\n                    ) on the linear absorption and fluorescence properties are systematically investigated. The target aza\u2010BODIPYs exhibit higher absorption in CHCl\n                    <jats:sub>3<\/jats:sub>\n                    compared to THF. While solvent polarity exerted a minimal effect on the absorption and fluorescence intensity, the fluorescence in\n                    <jats:bold>BOD2<\/jats:bold>\n                    and\n                    <jats:bold>BOD3<\/jats:bold>\n                    is markedly quenched as a result of the electron\u2010donating methoxy groups and the pronounced intramolecular charge transfer (ICT) characteristics of the diphenylamine unit. Moreover, all compounds shows strong near\u2010infrared two\u2010photon absorption (TPA) behavior. The TPA cross\u2010sections of\n                    <jats:bold>BOD1<\/jats:bold>\n                    and\n                    <jats:bold>BOD3<\/jats:bold>\n                    are measured as 61 and 269\u2009GM at 1000\u2009nm, respectively, and\n                    <jats:bold>BOD3<\/jats:bold>\n                    showed the highest value due to the enhanced ICT efficiency. Density functional theory calculations are also performed to study the thermodynamic and photophysical properties in different media. The findings indicated an enhancement in molecular stability and a reduction in HOMO\u2013LUMO gaps, particularly in THF. Among the compounds,\n                    <jats:bold>BOD3<\/jats:bold>\n                    stood out with its low energy gap and high polarizability, and its theoretical NLO parameters are in strong agreement with the experimental TPA findings.\n                  <\/jats:p>","DOI":"10.1002\/cplu.202500354","type":"journal-article","created":{"date-parts":[[2025,8,8]],"date-time":"2025-08-08T08:34:53Z","timestamp":1754642093000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Enhancing Near\u2010Infrared Two\u2010Photon Absorption of Aza\u2010Boron\u2010Dipyrromethene Compounds Through Intramolecular Charge Transfer Via Electron Donating Substitution"],"prefix":"10.1002","volume":"90","author":[{"given":"An\u0131l","family":"Do\u011fan","sequence":"first","affiliation":[{"name":"Department of Engineering Physics Faculty of Engineering Ankara University  Ankara 06100 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