期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 24, 期 55, 页码 14824-14829出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201803242
关键词
adsorption; colloids; ligand design; organic-inorganic hybrid composites; surface chemistry
资金
- National Institutes of Health [RCMI 5G12MD007595]
- Louisiana Cancer Research Consortium [NIGMS-BUILD UL1GM118967]
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 4.5nm -Fe2O3 nanoparticles and 5 is water-, alcohol- and CH2Cl2-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 degrees C, demonstrating the high practicality of 2-hydroxyisophthalic acid for nanoparticulate inorganic/organic hybrid material design.
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