Time-resolved fluorescence and UV absorbance study on Elaeis guineensis/oil palm leaf based carbon nanoparticles doped in nematic liquid crystals

Environmentally exploitable biocide/fluorescent metal marker carbon quantum dots

“…5 Aerwards, numerous studies were extensively concerned with investigating various methods for the synthesis of CQDs and studying their outstanding and superior properties, such as chemical inertness, amazing luminescence, low cost, excellent biocompatibility, and abundance of raw materials. [6][7][8][9][10][11][12] CQDs are mainly composed of C, H and O elements, while different organic and inorganic starting materials can be successively exploited in their synthesis. Polysaccharides as natural organic polymers can be successively employed in the generation of CQDs, which are supposed to be decorated with different functional groups.…”

Multifunctional Lipophobic Polymer Dots from Cyclodextrin: Antimicrobial/Anticancer Laborers and Silver Ions Chemo-Sensor

“…Dialysis as a step of ultra-purification of the ingrained PDs was performed for obtaining mono-dispersed PDs. The affinity of the current approach in nucleation of PDs was confirmed via different instruments like UV−visible spectroscopic analysis, transmission electron microscopy (TEM), FTIR, 1 HNMR, and 13 CNMR. Consequently, the photoluminescence of the clustered PDs was also studied, while the superiority in optical sensitiveness of the synthesized PDs was exploited for the detection of silver ions.…”

“…The absorbance was detected in the range of 500−4000 cm −1 using 15 points smoothing, 4 cm −1 resolution, and 64 scanning times with a scanning rate of 2 mm s −1 . Spectral mapping of nuclear magnetic resonance ( 1 H NMR and 13 C NMR) was detected on a Jeol-Ex-300 NMR spectrometer (JEOL-Japan). Photoluminescence for the synthesized PDs was monitored via spectro-fluorometer (JASCO FP8300).…”

“…Whereas, such bands were similarly detected under acidic conditions with red-shifting (Figure S4b). Figure S4c,d is plotted for 13 C NMR spectra PDs prepared under both acidic and basic conditions at 190 °C. It could be clearly observed that, the characteristic bands for PDs were detected at 24, 73, 170, and 174 ppm, corresponding to sp 3 carbons, carbons attached with hydroxyl groups, C�C specialized for aromatic or sp 2 carbons and carbons of C�O groups.…”

“…Polymer dots (PDs) are ascribed as one of the recently investigated members of carbon quantum dots (CQDs), ingrained from carbon enriched polymeric skeletons, decorated with heteroatoms containing functional groups. − PDs are known to exhibit a spherical-like topography, with a particle size less than 10 nm, to be characterized with more intriguing properties compared with the other carbon nanostructures . These lead to make PDs act as superior alternatives for the other members of carbon nanostructures. − Numerous reports were considerably interested in investigating of green costless techniques for nucleation of CQDs owing to their superiorly characteristic activities, like being chemically inert, photoluminescence, cost effectiveness, bio-competence, and abundancy of the starting equivalents. − …”