Novel coumarin-based pH sensitive fluorescent probes for the highly alkaline pH region was written by Nguyen, T. Hien;Sun, Tong;Grattan, Kenneth T. V.. And the article was included in Dyes and Pigments in 2020.HPLC of Formula: 638-07-3 The following contents are mentioned in the article:
The design, synthesis and spectroscopic properties of novel polymerizable coumarin-based pH indicators are reported. They show a fluorescence response to pH in the highly alk. pH region with calculated pKa values in the range of 12.2-12.5. Covalent immobilization of the indicators to polymer supports provides novel pH-sensitive materials that possess excellent photostability. The materials are sensitive to pH in a similar range and can be applied in optical pH sensors for measuring pH in various alk. media. This study involved multiple reactions and reactants, such as Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3HPLC of Formula: 638-07-3).
Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3) belongs to organic chlorides. Chlorination modifies the physical properties of hydrocarbons in several ways. These compounds are typically denser than water due to the higher atomic weight of chlorine versus hydrogen.While alkyl bromides and iodides are more reactive, alkyl chlorides tend to be less expensive and more readily available. Alkyl chlorides readily undergo attack by nucleophiles.HPLC of Formula: 638-07-3
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics