2.3.4. Low-field nuclear magnetic resonance cross-linked density using hydrogen NMR measurements were performed on a Bruker Mini-spec NMR spectrometer at a frequency of 20 MHz for 1 H under 40 ºC.

The 1 H NMR spectrum (Table 1) showed two deshielded signals assignable to a hydrogen-bonded hydroxyl group at d 13.30 and an aldehyde proton at d 9.26, corroborating with the observations from the IR ...

The light-promoted, nickel-catalyzed hydrogen-evolution C(sp3)–H acylation of simple alkanes with aromatic aldehydes has been achieved without the need for additional photosensitizers or oxidants.

The valorization of lignin into value-added products by oxidative conversion is a widely studied strategy. However, in many cases, this approach has limited scope for integration into industrial ...