Micellar Effect on Photoinduced Electron Transfer Reactions of Ruthenium(II) Polypyridyl Complexes with Quinones: Effect of CTAB

• 作者: George Allen Gnana Raj Thangadurai Sumitha Celin
• 来源期刊: 无机化学期刊(英文)
• 学科: 化学
• 关键词: QUENCHING Stern-Volmer Plot Static QUENCHING Ru(II) POLYPYRIDYL Complex
• 年，卷（期）: 2019,（1）
• 页码范围: 1-10
• 页数: 10页
• 分类号: O6

摘要

Photoinduced electron transfer reaction between the excited state ruthenium (II) polypyridyl complexes and quinones has been investigated in cetyltrimethylammonium bromide using luminescent quenching techniques. The complexes have the absorption and emission maximum in the range 452 - 468 nm and 594 - 617 nm respectively. The static nature of quenching is confirmed from the ground state absorption studies. The association constants for the complexes with quinones are calculated from the Benesi-Hildebrand plots using absorption spectral data. The value of quenching rate constant (kq) is highly sensitive to the nature of the ligand and the quencher, the medium, structure and size of the quenchers. Compared to the aqueous medium, the electron transfer rate is altered in CTAB medium. The oxidative nature of the quenching is confirmed by the formation of Ru3+ ion and quinone anion radical.