Designing a smart fluorescence chemosensor within the tailored channel of mesoporous material for sensitively monitoring toxic heavy metal ions Pb(II)

Synthesis and Encapsulation of bis-eugenol in a Mesoporous Solid Material: Enhancement of the Antioxidant Activity of a Natural Compound from Clove Oil

“…Previous investigations were based on supporting enzymes on ordered mesoporous solids [40] other studies used ordered mesoporous silica materials which are special for the architecture of fluorescence chemosensors to detect Pb 2+ [41] and this material is employed in osseous regeneration technologies [42].…”

Sensing Heavy Metals Using Mesoporous‐Based Optical Chemical Sensors

“…The determination of Zn 2+ ions is possible using ordered MPS material MCM-41 functionalised with quinoline derivative N-(quinolin-8-yl)-2-[3-(triethoxysilyl)propylamino]acetamide (QTEPA) [39]. This reported system selectively detects Zn 2+ ions with LOD of 0.1 × 10 −6 M and a working range of 0.01-30 × 10 −6 M. The presence of other metal ions did not affect the selectivity, even at high concentrations of Na + , K + , Ca 2+ , and Mg 2+ along with Zn 2+ ions [48] in solution. On the other hand, transition metals, from iron to copper, competed with the binding sites, even though there was an overall increase in fluorescence intensity with Zn 2+ binding.…”

“…Furthermore, there was no detected leaching of DTAR, although the dye was physisorbed into solid support. Wang et al [48] prepared a series of hybrid fluorescent sensors by direct covalent-coupling of bis-schiff-based N,N -(1,4-phenylenedimethylidyne)bis-1,4-benzenediamine (PMBA) on the inner surface of MPS (SBA-15), functionalised with chlorine groups. The fluorescent sensor exhibited high selectivity and sensitivity towards Pb 2+ ions with a LOD of 0.55 × 10 −9 M (0.1 ppb) and a working range of 2-50 × 10 −6 M. However, there is no information on the sensor .…”

“…When designing an OCS with the desired sensor characteristics, it is not only the selection of a suitable indicator, solid support (matrix), and immobilisation technique that is important but also the morphology and suitable functionalisation of 2 Journal of Nanomaterials such materials [18]. Over the years, different optical chemical sensors have been introduced based on silica mesoporous materials for the determination of mercury [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34], copper [35][36][37][38], zinc [39][40][41][42], and other heavy metal ions [43][44][45][46][47][48].…”

Fluorescence study of 5-nitroisatin Schiff base immobilized on SBA-15 for sensing Fe3+

“…Moreover, for chemosensor applications [27][28][29][30][31][32][33], the regularly arranged pores in its SBA-15 mesostructure can enhance the selectivity to particular guests like organic substance and/ or metal ions [34]. For Schiff base ligands as fluorescent chemosensors in the hybrid mesoporous silica materials, several reports have been published for sensing Al 3+ [35], Hg 2+ [36], Pb 2+ [37], Zn 2+ [38][39][40], and Cu 2+ ions [41][42][43]. In particular, Wang et al [44] and Afshani et al [45] have reported that the grafting of bis-Schiff base N,N′-(1,4-phenylenedimethyli-dyne)bis(1,4-benzenediamine) (PMBA) and salicylaldehyde with SBA-15 can be used for sensing Fe 3+ at a less intense blue-emission peak of the binding site consisting of a broad peak.…”