Photocatalytic Oxidation of Bromide to Bromine
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https://figshare.com/articles/dataset/Photocatalytic_Oxidation_of_Bromide_to_Bromine/3808272
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资源简介：
Three consecutive
bimolecular reactions are employed to photocatalyze bromide oxidation
to bromine. The system consists of a ruthenium(II) complex, [Ru(deeb)2(dmbpy)]2+ (deeb = 4,4′-diethylester-2,2′-bipyridine;
dmbpy = 4,4′-dimethyl-2,2′-bipyridine), 4-bromobenzenediazonium
tetrafluoroborate (ArN2BF4), and Br–. Varying reagent concentrations allowed us to optimize the sequence
of reactions for product formation. The electronically excited ruthenium
complex (*Ru) reacts first with ArN2BF4 to produce
a ruthenium(III) (RuIII) intermediate, triggering a subsequent
reaction with Br–. Transient absorption measured
at 486 and 380 nm provides insight into the time-dependent concentrations
of *Ru, RuIII, and Br2•–. Without interference of back-electron transfer, the rate constant
for an equal concentration bimolecular reaction of Br2•– was determined to be 5 × 109 M–1 s–1. The final products,
bromine and tribromide, were spectroscopically characterized, and
the turnover number (TON) was 230.
创建时间：
2016-09-07
