Journal
APPLIED CLAY SCIENCE
Volume 228, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.clay.2022.106621
Keywords
Montmorillonite; Vibrational circular dichroism; Iridium complex
Funding
- Japan Society for the Promotion of Science (JSPS) KAKENHI Grant [JP17H03044, JP19K05508, JP20K21090]
- Japan Science and Technology Agency (JST) MIRAI Grant [JPMJMI18GC]
- Ministry of Education, Science, Sports and Culture [JP21J15602, 21-IMS-C153]
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Solid state vibrational circular dichroism (SD-VCD) spectra were recorded on intercalation compounds of sodium montmorillonite with a chiral iridium(III) complex. The VCD signals were sensitive to molecular interactions in adsorption layers and signal enhancement was achieved through coherent delocalization of vibrational motions. Theoretical simulations were used to propose models of molecular packing.
Solid state vibrational circular dichroism (SD-VCD) spectra were recorded on the intercalation compounds of sodium montmorillonite with a chiral iridium(III) complex. The complex used was Delta- (or ?-)[Ir(bzq)2(phen)]+ (bzqH = benzo[h]quinoline; phen = 1,10-phenanthroline). The complex formed mono- or bi-molecular layers in interlayer spaces, depending on the adsorption amount to 50% or 100% cation exchange capacity (CEC), respectively. Notably, the VCD signals were sensitive enough to reveal the detailed molecular interactions in adsorption layers. Signal enhancement was achieved by the coherent delocalization of vibrational motions over tightly bound associates. Models of molecular packing were proposed with the help of theoretical simulations.
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