Selective and sensitive “turn-on” fluorescent Zn²⁺ sensors based on di- and tripyrrins with readily modulated emission wavelengths

Abstract

Di- and tripyrrin sensors D1-D4 exhibit CHEF-type fluorescence enhancement by factors up to 72 upon addition of 1 equiv. Zn(2+), with tunable emission colours between green (D1) and red (D4).

Zinc(II) Ion Sensing in Aqueous Micellar Solution Using Modified Bipyridine‐Based “Turn‐On” Fluorescent Probes and its Application in Bioimaging

“…The data indicated al igandto-metal ratio of 2:1( Figure6 andF igure S9) for both mole- www.chempluschem.org cules, thereby supporting the structures proposed in Scheme1.ABenesi-Hildebrandanalysis [32] of fluorescence titration data gave an association constant of 1.4 AE 0.2 10 3 m À2 and 3.9 AE 0.2 10 3 m À2 for the Zn 2 + complexes formed with PPQ and PPQ-OH,r espectively.A lso, the limit of detection (LOD) for Zn 2 + was found to be 3.7 10 À6 and 5 10 À6 m in SDS solution for PPQ and PPQ-OH, respectively ( Figure S10), according to ar eported method. [33] Af ew literature reports of LOD values for different Zn 2 + sensors are presented along with the results of this study in Table 2.…”

An off-on fluorescent probe for specifically detecting cysteine and its application in bioimaging

“…Compared to traditional techniques, chemical probes based on absorption or fluorescence changes are more feasible for detecting analyses owing to their many appealing advantages such as low detection limit, high selectivity, its real-time monitoring and its potential for vivo imaging of living cells. Moreover, probes that rely on fluorescence quenching suffer from inherent drawbacks including low signal-to-noise ratio and nonspecific quenching [18], so that "turn-on" type fluorescence probes are preferred [19][20][21]. Up to date, and only a few probes are able to discriminate between Cys, Hcy, and GSH [22][23][24][25].…”

Synthesis, structure and photoluminescence of (PLAGH)2[ZnCl4] and comparative analysis of photoluminescence properties with tris(2,2′-bipyridine)ruthenium(II)

“…On one hand, it is worth examining affinities of the organic materials to different metals, and determining sensitivity and selectivity to the aforementioned [9][10][11][12][13][14][15]. These properties can be used for the metal detectors or one-time indicators in liquids.…”