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Circular dichroism of surface complexes based on quantum dots and azo dye
Author(s) -
Kundelev Evgeny V.,
Orlova Anna O.,
Maslov Vladimir G.,
Baranov Alexander V.,
Fedorov Anatoly V.
Publication year - 2018
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.22788
Subject(s) - chemistry , circular dichroism , chirality (physics) , quantum dot , molecule , spectroscopy , crystallography , time dependent density functional theory , photochemistry , nanotechnology , organic chemistry , materials science , quantum mechanics , nambu–jona lasinio model , quark , chiral symmetry breaking , physics
Chiral properties of surface complexes based on CdSe/ZnS quantum dots (QDs) and 1‐(2‐pyridylazo)‐2‐naphthol (PAN) azo dye were investigated by circular dichroism spectroscopy. The use of L‐, D‐cysteine (Lcys, Dcys) capping ligands allowed us to obtain water‐soluble chiral QD‐PAN complexes. The characterization of the complexes was performed by UV‐vis, FTIR, and CD spectroscopy. Quantum chemical TDDFT calculated CD spectra reproduced the experimentally observed sign patterns, which originate from binding Lcys or Dcys and PAN molecules to the same Zn atom on the QD surface. The resulting complex is characterized by a large circular dichroism in comparison with an ordinary QD chirality induced by cysteine molecules. The pattern of CD signal is the same for Lcys and Dcys ligands in chiral QD‐PAN complex.