Detection of water in organic solvents by photo-induced electron transfer method

Abstract

A new class of fluorescence sensor for detection of water in organic solvents based on photo-induced electron transfer (PET) of anthracene coupled with an amino acid has been designed and developed.

Fluorescent Actuator Based on Microporous Conjugated Polymer with Intramolecular Stack Structure

“…[ 11 ] Recently, some water sensors based on organic fl uorophores have been developed. [ 12 ] On the other of the chemical potential of ethanol in the active layer and in the water media. The Hildebrand solubility parameters ( δ ) of ethanol and water are 26.2 and 48.0, respectively.…”

Inkjet‐Printable Amphiphilic Polydiacetylene Precursor for Hydrochromic Imaging on Paper

“…The solution was stirred at ambient temperature overnight and concentrated in vacuo to give a residue that was subjected to a silica gel column chromatography (methylene chloride/methanol, 96/4) to give the desired product as white solid (0.74 g, 82%). 1 H NMR (300 MHz, CDCl 3 , δ ): 7.54 (s, 1H), 7.03 (d, J = 0.9 Hz, 1H), 6.94 (t, J = 1.2 Hz, 1H), 6.21 (t, J = 5.7 Hz, 1H), 3.98 (t, J = 6.9 Hz, 2H), 3.24 (q, J = 6.6 Hz, 2H), 2.21 (t, J = 6.9 Hz, 4H), 2.14 (t, J = 7.8 Hz, 2H), 1.98 (quint, J = 6.6 Hz, 2H), 1.61-1.24 (m, 28H), 0.86 (t, J = 6.9 Hz, 3H); 13 3.00 mmol) in 10 mL methylene chloride was added to a solution of 2,5-dioxopyrrolidin-1-yl heptadeca-4,6-diynoate (HDDA-NHS, 0.72 g, 2.00 mmol) and TEA (0.41 g, 4 mmol) in 10 mL of methylene chloride. The solution was stirred at ambient temperature overnight and concentrated in vacuo to give a residue that was subjected to a silica gel column chromatography (methylene chloride/methanol, 96/4) to give the desired product as yellow liquid (0.57 g, 77%).…”

“…These materials have found great utility in sensing humidity [1][2][3][4][5][6][7][8][9][10][11][12] and measuring the water contents of organic solvents. [13][14][15][16][17][18] Designs of hydrochromic humidity sensors can be based on conjugated organic molecules that undergo color changes associated with polarity changes caused by exposure to water. [ 1,2 ] Certain periodically ordered polymer fi lms, which have refl ectance wavelengths that the interchain distance in this polymer leads to partial distortion of the arrayed p-orbitals and an associated change in the wavelength maximum for visible light absorption.…”

“…[3][4][5][6] Hydrochromic substances bearing amino-coupled fl uorophores also have been employed to determine the presence of water in organic solvents. [ 13,14 ] Sensors of this type emit only weak fl uorescence owing to the occurrence of facile quenching caused by photoinduced electron transfer (PET) from the amine moiety to the fl uorophore. However, in these systems blocking PET quenching by the formation of ammonium salt containing zwitterions when water is present in organic solvents results in the generation of strong fl uorescence.…”

Highly sensitive fluorescent sensing for water based on poly(m-aminobenzoic acid)

“…Water sensors based on fluorescent ''turn-on'' or ''turn-off '' mechanisms have been widely employed and proven to be highly desirable due to their high signal output and feasible measurements. [1][2][3][4][5] In most of these fluorescence water sensors, however, small molecule organic compounds are usually employed as sensing elements, for which it is difficult to respond to a trace amount of water. To circumvent the drawback, a new kind of fluorescent sensing probe should be explored as an alternative.…”