Synthesis and Photophysical Behavior of Pyrene‐Bearing Cellulose Nanocrystals for Fe³⁺ Sensing

Abstract

Cellulose nanocrystals are converted into fluorescent labeling nanoparticles (Py‐CNC) by a three‐step procedure. The fluorescence emission of pyrene is enhanced after the modification to cellulose nanocrystals. Py‐CNC is evaluated for its sensing ability towards metal ions and exhibits high selectivity towards Fe3+ among other screened metal ions with good discrimination between Fe2+ and Fe3+. The excellent selectivity for Fe3+ over a wide linear concentration range is observed through changes in the emission spectra. Spectroscopic analyses prove that the coordination interaction between Fe3+ and pyrene‐modified cellulose nanocrystals leads to the recognition process. This sensing nanomaterial can be employed as a chemosensor for Fe3+ and promoted for many applications in chemical, environmental, and biological systems.

Synthesis, characterization, and Pb2+ ion sensing application of hexa‐armed dansyl end‐capped poly(ε‐caprolactone) star polymer with phosphazene core

“…[1][2][3][4] The accumulation of the heavy metals in the ecosystem majorly occurs via industrial processes. While some of them are highly toxic for human health, such as lead and mercury, some others are among the essential micronutrients for animals and plants.…”

“…While some of them are highly toxic for human health, such as lead and mercury, some others are among the essential micronutrients for animals and plants. [1][2][3][4] The accumulation of the heavy metals in the ecosystem majorly occurs via industrial processes. 5,6 The use of old water pipes, lead-based old paints, and ceramic glazes are among the other sources of Pb 21 ion in the environment.…”

High value‐added monomer chemicals and functional bio‐based materials derived from polymeric components of lignocellulose by organosolv fractionation

“…By conjugating to pyrene, CNCs can be converted into fluorescent labeled nanoparticles with high selectivity toward Fe 3+ , so they show potential to be used as chemosensors for Fe 3+ . 164 The conjugation of CNCs with biocompatible polymers improves the loading and CNCs dispersion. 165 Super-absorbent aerogels grafted with CNCs can be applied to improve the release control of amoxicillin.…”

Synthesis, Characterization, and Ion Sensing Application of Pyrene‐Containing Chemical Probes

“…Pyrene‐containing macromolecular structures have attracted a great deal of attention to be employed in fluorescent probes due to their long fluorescence lifetime and a well‐defined fluorescence spectrum, which is sensitive to the polarity of the environment . There are numerous studies in the literature on the fluorescence sensor applications of pyrene‐containing molecular compounds and high‐molecular polymers toward various analytes, including nitroaromatic compounds, metal ions, anions, and glucose …”

“…[1][2][3] While some ionic species are essential to sustain growth, they may act as harmful pollutants in the environment. [ 4 ] As an example, compounds, [ 16,17 ] metal ions, [ 14,[18][19][20][21] anions, [ 22,23 ] and glucose. [ 24 ] Chemosensors are chemical compounds which can respond to the changes in their chemical environment when it binds to a guest counterpart by altering their electrical, electronic, magnetic, or optical signal.…”