Luminophoric organic molecules for anticounterfeit printing ink applications: an up-to-date review

Muthamma, Kashmitha; Sunil, Dhanya; Shetty, Prakash

doi:10.1016/j.mtchem.2020.100361

Cited by 34 publications

(34 citation statements)

References 64 publications

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“…This indicates the involved photochemical process for P1a−c/2a/3 is reliable and the resulting three types of photoresponsive behaviors can be employed for further technological applications in anti-counterfeiting and optoelectrical devices. 36,37 Collectively, the present polymerization methodology provides a facile and simple tool to construct poly(quinoline)s with adaptable photophysical properties and photo-sensitivities. Morphological Visualization.…”

Section: Resultsmentioning

confidence: 99%

In-Situ Generation of N-Heteroaromatic Polymers: Metal-Free Polymerization and Multiple Functionalities

Yan²,

Liu³

et al. 2020

Preprint

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The electron-deficient N-heteroaromatic polymers are crucial for the high-tech applications of organic materials, especially in the electronic and optoelectronic fields. Thus, the development of new polymerizations to afford adaptable electron donating-accepting scaffolds in N-heteroaromatic polymers is in high demand. Herein, metal-free multicomponent polymerizations of diynes, diamines and glyoxylates are successfully developed for in-situ generation of poly(quinoline)s with high molecular weights (Mw up to 16 900) in nearly quantitative yields. By tuning the electron distributions of the polymer backbones, the resulting poly(quinoline)s show various aggregation-induced behaviors and photo-responsive abilities. The thin films of these poly(quinoline)s can be readily fabricated into well-resolved fluorescent photopatterns by photolithography techniques. They can be utilized as fluorescent probes to visualize the morphologies of polymer materials including spherulites and microphase separation of polymer blends. Their nanoparticles demonstrate sensitive and highly selective fluorescence quenching to hexavalent chromium ion Cr(VI), which provides access for the biological imaging of Cr(VI) in unicellular algae.

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Section: Resultsmentioning

confidence: 99%

In-Situ Generation of N-Heteroaromatic Polymers: Metal-Free Polymerization and Multiple Functionalities

Yan²,

Liu³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Such photolithography process will usually keep the photochemical process for P1a−c/2a/3 is reliable and the resulting three types of photoresponsive behaviors can be employed for further technological applications in anti-counterfeiting and optoelectrical devices. [42][43] Collectively, the present polymerization methodology provides a facile and simple tool to construct poly(quinoline)s with adaptable photophysical properties and photo-sensitivities.…”

Section: Photophysical Propertiesmentioning

confidence: 99%

In Situ Generation of N -Heteroaromatic Polymers: Metal-Free Multicomponent Polymerization for Photopatterning, Morphological Imaging, and Cr(VI) Sensing

Yan

Liu

et al. 2022

CCS Chem

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The electron-deficient N-heteroaromatic polymers are crucial for the high-tech applications of organic materials, especially in the electronic and optoelectronic fields. Thus, the development of new polymerizations to afford adaptable electron donating-accepting scaffolds in N-heteroaromatic polymers is in high demand.Herein, metal-free multicomponent polymerizations of diynes, diamines and glyoxylates are successfully developed for in-situ generation of poly(quinoline)s with high molecular weights (M w up to 16 900) in nearly quantitative yields. By tuning the electron distributions of the polymer backbones, the resulting poly(quinoline)s show various aggregation-induced behaviors and photo-responsive abilities. The thin films of poly(quinoline)s can be readily fabricated into well-resolved photopatterns by photolithography techniques.They can be utilized as fluorescent probes to directly visualize the morphologies of polymer materials including spherulites and microphase separation of polymer blends. Their nanoparticles demonstrate sensitive and highly selective fluorescence quenching to hexavalent chromium ion Cr(VI), which provides access for the biological imaging of Cr(VI) in unicellular algae.

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“…A range of anti-counterfeiting applications have reported for the UVstimulated photochromic activity. [41][42][43] PET and LdAN were combined together to create a transparent sheet. In order to investigate the photochromic and long-persistent phosphorescence activities of the sheets, photographs of the PET-12 sheet were shot under visible and UV light, and under darkness.…”

Section: Photochromic Propertiesmentioning

confidence: 99%

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

et al. 2022

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Smart window can be defined as switchable material whose light transmission is altered upon exposure to light, voltage, or heat. However, smart windows are usually produced from expensive and breakable glass materials. Herein, transparent smart window with long-persistent phosphorescence, high optical transmittance, ultraviolet (UV) protection, rigid, high photostability and durability, an d superhydrophobicity was developed from recycled polyester (PET). Recycled polyester waste (RBW) was simply immobilized with different ratios of lanthanide-doped aluminate nanoparticles (LdAN) to provide a long-persistent phosphorescent polyester smart window (LdAN@PET) with an abili ty to persist emitting light for extended time periods. The solid-state high temperature technique was used to prepare lanthanide-doped aluminate (LdA) micro-scale powder. Then, the top-down technique was applied to afford the corresponding LdAN. Recycled shredded recycled polyester bottles were charged into a hot bath to provide a clear plastic shred bulk, which was then well-mixed with LdAN and drop-casted to provide long-persistent luminescent smart window. In order to improve the phosphor dispersion in the PET bulk, LdAN was synthesized in the nanoparticle form which was characterized utilizing transmission electron microscopy (TEM). For better preparation of translucent smart window of long-persistent phosphorescent polyester, LdAN must be homogeneously dispersed in the PET matrix without agglomeration. The morphology and chemical composition were studied by Fourier-transform infrared (FTIR) spectra), X-ray fluorescence (XRF) analysis, scanning electron microscopy (SEM), and energy-dispersion X-ray spectroscopy (EDX). In addition, spectral profiles of excitation and emission, and decay and lifetime were used to better understand the photoluminescence properties. The hardness properties were also investigated. The developed phosphorescent transparent polyester smart window demonstrated a color switch to intense green underneath UV irradiation and greenish-yellow under darkness as verified by CIELab color parameters. The afterglow polyester smart window showed an absorption wavelength at 365 nm and two phosphorescence intensities at 442 and 512 nm. An enhanced UV protection, photostability and hydrophobic activity were detected. The luminescent polyester substrates with lower LdAN ratios demonstrated rapid and reversible

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Luminophoric organic molecules for anticounterfeit printing ink applications: an up-to-date review

Cited by 34 publications

References 64 publications

In-Situ Generation of N-Heteroaromatic Polymers: Metal-Free Polymerization and Multiple Functionalities

In-Situ Generation of N-Heteroaromatic Polymers: Metal-Free Polymerization and Multiple Functionalities

In Situ Generation of N -Heteroaromatic Polymers: Metal-Free Multicomponent Polymerization for Photopatterning, Morphological Imaging, and Cr(VI) Sensing

Immobilization of lanthanide doped aluminate phosphor onto recycled polyester toward the development of long‐persistent photoluminescence smart window

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