期刊
CHEMICAL SCIENCE
卷 12, 期 21, 页码 7460-7466出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sc01196k
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-
资金
- University of Roma La Sapienza (Progetti di Ricerca Grandi 2018) [RG1181641DCAAC4E]
The report demonstrates the use of nitroacetic acid to control the pH of a water solution over time, allowing for time-programmable pH sequences by predicting the extent of pH changes and time required through reagent concentrations. The method was successfully applied to control the pH-dependent host-guest interaction.
In this report it is shown that nitroacetic acid 1 (O2NCH2CO2H) can be conveniently used to control the pH of a water solution over time. Time-programmable sequences of the kind pH(1(high))-pH(2(low))-pH(3(high)) can be achieved, where both the extent of the initial pH jump (pH(1(high))-pH(2(low))) and the time required for the subsequent pH rising (pH(2(low))-pH(3(high))) can be predictably controlled by a judicious choice of the absolute and relative concentrations of the reagents (acid 1 and NaOH). Successive pH(1(high))-pH(2(low))-pH(3(high)) sequences can be obtained by subsequent additions of acid 1. As a proof of concept, the method is applied to control over time the pH-dependent host-guest interaction between alpha-cyclodextrin and p-aminobenzoic acid.
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