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Quantifying the Covalent Functionalization of Black Phosphorus
Author(s) -
Wild Stefan,
Dinh Xuan Thong,
Maid Harald,
Hauke Frank,
Abellán Gonzalo,
Hirsch Andreas
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202008646
Subject(s) - surface modification , raman spectroscopy , covalent bond , magic angle spinning , intercalation (chemistry) , spectroscopy , graphene , nuclear magnetic resonance spectroscopy , chemistry , materials science , nanotechnology , organic chemistry , physics , optics , quantum mechanics
A straightforward quantification method to consistently determine the overall functionalization degree of covalently modified two‐dimensional (2D) black phosphorus (BP) by Raman spectroscopy has been carried out. Indeed, the successful reductive methylation of the BP lattice using sodium intercalation compounds and exhibiting different functionalization degrees has been demonstrated by 31 P‐magic angle spinning (MAS) NMR spectroscopy. Furthermore, the correlation of 31 P‐MAS NMR spectroscopy and statistical Raman spectroscopy (SRS) revealed the first method to determine the functionalization degree of BP solely by evaluating the intensities of distinct peaks in the Raman spectra of the covalently modified material, in a similar way to the widely employed I D / I G ratio of graphene research.