| Sustainable aerobic bromination of aromatic compounds using a reusable TiO₂–HNT photocatalysts with excellent para‑selectivity |
| کد مقاله : 1235-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 |
| چکیده مقاله |
| A sustainable and efficient visible‑light‑driven photocatalytic system for the regioselective bromination of aromatic compounds is presented [1]. The method employs heterogeneous TiO₂–halloysite nanotube (TiO₂–HNT) composites as a reusable photocatalyst, using KBr as an inexpensive bromine source and molecular oxygen as a green oxidant (Scheme 1). The TiO₂–HNT catalyst is synthesized via low‑temperature in situ crystallization, where halloysite nanotubes direct uniform TiO₂ crystal growth and enable precise control over anatase or anatase/rutile mixed phases. Under mild conditions, the protocol delivers high yields and excellent para‑selectivity for electron‑rich arenes, along with broad functional‑group tolerance [2]. The heterogeneous catalyst can be easily recovered and reused without significant loss of activity, and ICP‑OES analysis confirms negligible metal leaching. Overall, this study provides a practical and environmentally benign approach for aromatic bromination and highlights the potential of TiO₂–halloysite photocatalysts in visible‑light‑driven oxidative C–H functionalization reactions. |
| کلیدواژه ها |
| Bromination, TiO2–halloysite nanotubes, Transition‑Metal‑Catalyzed C–H Functionalization, visible-light photocatalytic activity |
| وضعیت: پذیرفته شده |