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In‐Situ Microfluidic Study of Biphasic Nanocrystal Ligand‐Exchange Reactions Using an Oscillatory Flow Reactor
Author(s) -
Shen Yi,
Abolhasani Milad,
Chen Yue,
Xie Lisi,
Yang Lu,
Coley Connor W.,
Bawendi Moungi G.,
Jensen Klavs F.
Publication year - 2017
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.201710899
Subject(s) - nanocrystal , ligand (biochemistry) , quantum dot , microfluidics , in situ , chemistry , sulfide , chemical engineering , materials science , photochemistry , nanotechnology , inorganic chemistry , organic chemistry , biochemistry , receptor , engineering
Abstract Oscillatory flow reactors provide a surface energy‐driven approach for automatically screening reaction conditions and studying reaction mechanisms of biphasic nanocrystal ligand‐exchange reactions. Sulfide and cysteine ligand‐exchange reactions with as‐synthesized CdSe quantum dots (QDs) are chosen as two model reactions. Different reaction variables including the new‐ligand‐to‐QD ratio, the size of the particles, and the original ligand type are examined systematically. Based on the in situ‐obtained UV/Vis absorption spectra during the reaction, we propose two different exchange pathways for the sulfide exchange reaction.