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Tenacic Acids: A New Class of Tenacious Binders to Metal Oxide Surfaces
Author(s) -
Komati Rajesh,
Mitchell Carl A.,
LeBeaud Anastasia,
Do Huy,
Goloverda Galina Z.,
Kolesnichenko Vladimir L.
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201803242
Subject(s) - metal , class (philosophy) , oxide , materials science , chemistry , metallurgy , computer science , artificial intelligence
The backbone of 2‐hydroxyisophthalic acid was identified as a potential metal oxide anchor because of the perfect alignment of all three of its donor groups for binding to inorganic surfaces. It can therefore be used in the design of organic linkers for metal oxide based hybrid materials. Optimized and scalable methods for the synthesis of 2‐hydroxyisophthalic acid ( 1 ) and its 5‐substituted derivatives: 5‐bromo‐ ( 2 ), 5‐sulfooxy‐ ( 3 ), 5‐hydroxy‐ ( 4 ), and 5‐PEG600 ( 5 ) are presented. Dynamic light scattering (DLS) demonstrated that compound 2 inhibits Fe(OH) 3 precipitation when Fe III aqueous solutions are titrated with NaOH, while similar titrations in the presence of the structurally‐related isophthalic and salicylic acids, both missing the third donor group, show turbidity at pHs as low as 2.3 and 3.5, respectively. The adduct synthesized from 4.5 nm γ‐Fe 2 O 3 nanoparticles and 5 is water‐, alcohol‐ and CH 2 Cl 2 ‐soluble, and forms stable aqueous colloids in the pH range of 4.4–8.7. Moreover, at a pH close to neutral these colloids survive at 100 °C, demonstrating the high practicality of 2‐hydroxyisophthalic acid for nanoparticulate inorganic/organic hybrid material design.