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Raman studies on the specific adsorption of BPE with PbI 2
Author(s) -
Zhu Lin,
Ma Hao,
Song Wei,
Wang He,
Li Peng,
Ma Chao,
Wu Jiawei,
Guo Lin,
Zhao Bing
Publication year - 2021
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.6013
Subject(s) - raman spectroscopy , intercalation (chemistry) , molecule , adsorption , crystallography , chemistry , scanning electron microscope , crystal (programming language) , spectroscopy , absorption spectroscopy , materials science , inorganic chemistry , organic chemistry , optics , physics , quantum mechanics , computer science , composite material , programming language
Intercalation, the insertion of guest atomic and molecular entities into the architecture of a crystal, is an efficient route for generating new materials with novel properties. However, the detailed analysis of their new structure and properties is of great importance, which are still insufficient. Here, 1,2‐bis(4‐pyridyl)ethylene (BPE) intercalated PbI 2 (BIP) has been investigated by Raman spectroscopy together with correlated studies of scanning electron microscope (SEM), X‐ray diffraction (XRD), ultraviolet–visible (UV–Vis) absorption spectrum, and energy‐dispersive X‐ray spectroscopy (EDS). The Raman spectrum of intercalated compound discloses new lines at 83, 222, and 234 cm −1 with remarkable displacement of the bands at 1001, 1200, 1603, and 1640 cm −1 , indicating a formation of a new crystal and the chemical interaction between the nitrogen atom of guest molecules with PbI 2 host material. XRD confirmed the intercalation of guest molecules into a host matrix through the appearance of diffraction lines at lower angles that are corresponding to the enlarged unit cell in c axis. Furthermore, we also found that the PbI 2 can specifically adsorb of BPE molecules, which was confirmed by an adsorption experiment revealed by adsorption capacity toward BPE is higher than 2,2‐bipyridine and 4,4‐bipyridine, suggesting the good adsorptive selectivity toward BPE by PbI 2 film. This work further demonstrated our mechanism on enhanced Raman spectroscopy on PbI 2 . It is believed that this unusual discovery not only enables PbI 2 to be a specific adsorbent, which also provides a new advance toward a better understanding of structure about PbI 2 .