| Low temperature in situ engineering of crystalline TiO₂–Halloysite nanotube heterostructures for enhanced visible light photocatalytic synthesis of aryl sulfonyl fluorides |
| کد مقاله : 1237-ICOC |
| نویسندگان |
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دانیال زندحسین شاهی1، علی اکبری *2، Asadollah Hassankhani3 1دانشجو کارشناسی ارشد_روزانه/ گروه شیمی_ رشته شیمی آلی /دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته کرمان 2Department of Chemistry, Faculty of Science, University of Jiroft, Jiroft, P. O. Box 8767161167, Iran. 3Department of New Materials, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, P.O Box 76315-117, Kerman, Iran. Tel.: +98 3426226617, Fax: +98 3426226611-12 |
| چکیده مقاله |
| This study presents a low‑temperature in situ approach for the synthesis of crystalline TiO₂–halloysite nanotube (TiO₂–HNT) heterostructures and their application in visible‑light‑driven photocatalytic synthesis of aryl sulfonyl fluorides (Scheme 1). Halloysite nanotubes act as a robust one‑dimensional support, enabling uniform TiO₂ nucleation while preserving structural integrity under mild conditions [1]. Controlled adjustment of the TiO₂ sol acidity allows precise tuning of the crystalline phase, affording anatase or mixed anatase/rutile heterostructures with improved charge separation and suppressed electron–hole recombination. Comprehensive characterization confirms uniform TiO₂ dispersion, enhanced surface area, and superior visible‑light absorption, particularly for mixed‑phase composites [2]. The TiO₂–HNT photocatalyst efficiently promotes the visible‑light‑mediated reaction of aryldiazonium salts with DABSO and a fluoride source under organophotoredox conditions, enabling access to aryl sulfonyl fluorides with broad substrate scope and high functional group tolerance. The heterogeneous nature of the catalyst ensures facile recovery and reuse, providing a sustainable and practical platform for visible‑light‑driven C–SO₂F bond formation. |
| کلیدواژه ها |
| Arylsulfonyl fluorides, TiO2–halloysite nanotubes, Visible-light photocatalytic activity |
| وضعیت: پذیرفته شده |