Rhodamine–alginate conjugate as self indicating gel beads for efficient detection and scavenging of Hg²⁺and Cr³⁺in aqueous media

Abstract

Effective extraction of Hg(2+) and Cr(3+) ions from aqueous media by novel rhodamine-alginate polymer-based highly fluorogenic, as well as colorimetric, chemosensor beads.

A highly selective and sensitive fluorescent sensor for the rapid detection of Hg2+ based on phenylamine-oligothiophene derivative

“…Among the various assays that are available for the detection of cations, the techniques based on fluorescence sensors present a number of appealing advantages in terms of high sensitivity and selectivity, low cost, facile operation, response time, local observation and the wide spread availability of equipment for analysis [5][6][7]. A great number of scientific endeavors have focused on the development of fluorescent chemosensors for Hg 2+ such as small molecules [8][9][10][11][12][13][14][15][16][17], conjugated polymers [18,19], nanoparticles [20][21][22][23], and biomolecules [24][25][26]. However, some of them still suffer from practical use, including crosssensitivities toward other metal ions, narrow pH span, delayed response and so on.…”

Simultaneous detection and removal of radioisotopes with modified alginate beads containing an azo-based probe using RGB coordinates

“…The reaction mixture was stirred at room temperature for 1 h. A solution of BO2 (125.6 mg, 0.505 mmol) dissolved in distilled water (70 mL) was added to the reaction mixture. The reaction mixture was stirred at room temperature for 16 h. The reaction mixture was precipitated in isopropyl alcohol and washed twice with isopropyl alcohol [15,[26][27][28][29][30].…”

“…Sodium alginate, a sodium salt of alginic acid is a biopolymer containing a carboxylate group in its repeat unit [15,16]. Using this carboxylate group, alginate beads have been fabricated based on its unique gelation properties in the presence of divalent cations http://dx.doi.org/10.1016/j.jhazmat.2015.06.051 0304-3894/© 2015 Elsevier B.V. All rights reserved.…”

Rhodamine B immobilized on hollow Au–HMS material for naked-eye detection of Hg2+ in aqueous media

“…Although these methods are quantitative and powerful, the analyses require expensive instruments, highly trained personnel, and tedious maintenance. To avoid this, alternative approaches using fluorescence-based molecular sensors [9][10][11] and chemosensors [12][13][14] have been actively pursued. Designing a chemosensor that operate in aqueous solution will be of benefit for many practical applications [15], so a recent goal in chemosensor design is to find a suitable carrier.…”