Charge-transfer bands and the Br81 NQR spectra of CBr4-amine complexes

79/81Br nuclear quadrupole resonance spectroscopic characterization of halogen bonds in supramolecular assemblies

“…To the best of our knowledge, only a handful of data has been published in the literature regarding the characterization of the halogen bond by 81 Br NQR. 48 As shown in Fig. 2 , the 79 Br and 81 Br NQR frequencies shift towards a higher frequency upon the formation of a halogen bond.…”