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Ligand Exchange Reactions between Phosphonic Acids at TiO 2 Nanoparticle Surfaces
Author(s) -
Yamashita Shohei,
Sudo Tatsuya,
Kamiya Hidehiro,
Okada Yohei
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100541
Subject(s) - phosphonate , ligand (biochemistry) , nanoparticle , colloid , chemistry , toluene , homogeneous , decantation , combinatorial chemistry , nanotechnology , materials science , chemical engineering , organic chemistry , biochemistry , receptor , physics , engineering , thermodynamics
Understanding the surface chemistry of organic‐inorganic interfaces is a prerequisite for the design of novel nanohybrid materials. Herein, we disclose that phosphonate ligands tightly bind to TiO 2 nanoparticle surfaces and cannot be displaced even through repetitive decantation by methanol. However, 1D 1 H solution NMR analyses unambiguously show that they can be effectively exchanged by other phosphonic acids. A key enabler for successful measurements is the design and synthesis of a novel phosphonic acid ligand that stabilizes TiO 2 nanoparticles in toluene to form homogeneous colloidal conditions.