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 pH1(high)-pH2(low)-pH3(high) can be achieved, where both the extent of the initial pH jump (pH1(high)-pH2(low)) and the time required for the subsequent pH rising (pH2(low)-pH3(high)) can be predictably controlled by a judicious choice of the absolute and relative concentrations of the reagents (acid 1 and NaOH). Successive pH1(high)-pH2(low)-pH3(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. This journal is

Time-programmable pH: decarboxylation of nitroacetic acid allows the time-controlled rising of pH to a definite value / Del Giudice, Daniele; Spatola, Emanuele; Valentini, Matteo; Bombelli, Cecilia; Ercolani, Gianfranco; DI STEFANO, Stefano. - In: CHEMICAL SCIENCE. - ISSN 2041-6520. - 12:21(2021), pp. 7460-7466. [10.1039/d1sc01196k]

Time-programmable pH: decarboxylation of nitroacetic acid allows the time-controlled rising of pH to a definite value

Del Giudice, Daniele;Spatola, Emanuele;Valentini, Matteo;Bombelli, Cecilia;Ercolani, Gianfranco;Di Stefano, S
2021

Abstract

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 pH1(high)-pH2(low)-pH3(high) can be achieved, where both the extent of the initial pH jump (pH1(high)-pH2(low)) and the time required for the subsequent pH rising (pH2(low)-pH3(high)) can be predictably controlled by a judicious choice of the absolute and relative concentrations of the reagents (acid 1 and NaOH). Successive pH1(high)-pH2(low)-pH3(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. This journal is
2021
pH; temporal control; molecular motion; chemical fuel; dissipative systems; host-guest chemistry
01 Pubblicazione su rivista::01a Articolo in rivista
Time-programmable pH: decarboxylation of nitroacetic acid allows the time-controlled rising of pH to a definite value / Del Giudice, Daniele; Spatola, Emanuele; Valentini, Matteo; Bombelli, Cecilia; Ercolani, Gianfranco; DI STEFANO, Stefano. - In: CHEMICAL SCIENCE. - ISSN 2041-6520. - 12:21(2021), pp. 7460-7466. [10.1039/d1sc01196k]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1552115
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