Evidence item

The seven-order comparison is the first Zn–nitrate binding event measured by NMR under the study’s mixed stoichiometric binding model, not a general affinity for every nitrate condition. MEASUREMENT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 25941

Source: Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron · locator {} · excerpt hash sha256:eaeb5c00432057ca3f5d6051e1539edb4f024a7e638da2c5d5e6940d418d65ba

We quantified the NO3− binding affinities of I-Zn and II-Zn through iterative additions of [Bu4N][NO3], assessed using 1H nuclear magnetic resonance spectroscopy. The binding isotherms were best modelled by a mixed (Zn:NO3−) 2:1/1:1/1:2 model... The largest difference is the first binding event, K1:1 = 0.18 ± 0.04 M−1 for II-Zn versus (1.5 ± 0.6) × 106 M−1 for I-Zn.