Photochemistry of chalcone and the application of chalcone-derivatives in photo-alignment layer of liquid crystal display

Song, Dong-Mee; Jung, Kyoung-Hoon; Moon, Ji-Hye; Shin, Dong-Myung

doi:10.1016/s0925-3467(02)00220-3

Cited by 65 publications

(14 citation statements)

References 4 publications

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“…However, chalcone compounds showed absorption in the UV range (300-400 nm), while lysozyme protein dissolved in 0.1 M sodium acetate and 1 M NaCl showed strong absorption around 280 nm that arise from amino acids such as tryptophan, tyrosine and cysteine. The chalcone compounds showed absorption around 340 nm, which is a known characteristic of these compounds (Song et al, 2003). On the other hand, we have observed the gaseous bubble formations around the focal point of samples.…”

Section: Possible Mechanism Of Nucleation Under Laser Irradiationmentioning

confidence: 54%

Small and Macromolecules Crystallization Induced by Focused Ultrafast Laser

Shilpa¹,

Bhat²,

Rodrigues³

et al. 2015

Proceedings of the Indian National Science Academy

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The structure based drug design has been limited by various factors that include protein crystallization, which is one of the most challenging tasks in this area. It has been proved unequivocally that X-ray crystallography is highly trusted technique for three dimensional structure determination of small-and macro-molecules. It has provided the definite solution for several key areas such as structure based drug design, site directed mutagenesis and elucidation of enzyme mechanisms. In X-ray crystallography, growing good quality of crystals for structure determination is always, the rate limiting step. Various approaches including laser induced crystallization technique has been reported to tackle this issue. We report on the crystallization of small-and macro-molecules under focused optical radiation from a femtosecond laser (λ = 800 nm). The efficacy of this technique is proved by crystallizing different samples such as sodium chloride and urea, and by comparing the results to those crystals obtained by conventional methods. In addition, the unique capability of the developed technique is demonstrated by crystallizing the three chalcone compounds that are difficult to crystallize using conventional methods. Furthermore, the developed technique is extended to crystallize protein molecule (lysozyme) and the results indicate that present technique is a potential alternative tool to crystallize biomolecules.

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Section: Possible Mechanism Of Nucleation Under Laser Irradiationmentioning

confidence: 54%

Small and Macromolecules Crystallization Induced by Focused Ultrafast Laser

Shilpa¹,

Bhat²,

Rodrigues³

et al. 2015

Proceedings of the Indian National Science Academy

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“…Because their polymer structures are compatible with base modifications to obtain macromolecules with specific synthesis applications, photopolymers are used by considering the characteristics of the macromolecules and photosensitive groups. Among these, polymers that have functional groups that may be photocrossling such as calgon, thymine or coumarine represent an active research area in the polymer science due to their technological importance in photolithography (Jeong et al 2005), non-linear optical materials (Zhang et al 1999), advanced microelectronic (Mizoguchi and Hasegawa 1996), liquid crystal materials (Song et al 2002) and electrophotographic coatings (Allen et al 1998) areas. Chalcone and its derivatives attract attention in the organic and medical areas due to their photophysical and photochemical behaviors.…”

Section: öZetmentioning

confidence: 99%

Synthesis, Characterization of Chalcone Containing Methacrylate Polymers: Investigation of Fluorescence, Thermal and Dielectric Properties

Çoşkun¹,

Şentürk²,

Coskun³

2016

AKU-J. Sci. Eng.

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In this study, the (1-benzofurane-2-yl)-3-oxo-prop-1-en-1-yl]-2-methoxyphenyl 2-methyl acrylate monomer were synthesized from the acylation reaction of this compound with methacryloyl chloride that commercially purchased. Free radicalic or atom transfer radical polymerization methods were used for preparation of copolymers. FT-IR, 1 H and 13 C-NMR techniques were used for structure characterization of polymers. The thermal behaviors of polymers were relatively investigated by DSC and TGA, and the results were compared with each other. The dielectric behaviors of polymers were investigated as a function of temperature and frequency. The results obtained were associated with their the structures. The spectroscopic properties of the polymers were investigated by UV-Vis and fluorescence spectroscopies. Effects of the solvent polarity on emission measurement were investigated with fluorescence spectroscopy. Under cover of dimerization property of chalcone, the chalcone ended polymer was photodimerizatied.

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“…12 Grafting of a nitrile group onto polyimide was reported to improve the adhesion of polyimide to copper. 13 The modification methods are advantageous in obtaining the target properties without significantly changing the intrinsic properties of polymers. Among the polymers, PU has been frequently selected as the polymer backbone because of its excellent mechanical properties, reproducible shape recovery, resistance to acids and bases, and high industrial demand in coatings and textiles.…”

Section: Introductionmentioning

confidence: 99%

Citric acid grafting onto polyurethane for the control of molecular interactions and water compatibility

Chung

Yoon

Choi

et al. 2016

Journal of Elastomers & Plastics

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Citric acid (CA) was used as a grafted group onto polyurethane (PU) to form a CA-grafted PU series, with a control PU series containing free CA prepared for comparison. With an increase in the CA content, the enthalpy change during the melting increased for the PU and CPU series, and the glass transition temperature increased with the increase in CA content for the PU series but not for the CPU series. The tensile strengths of the PU series sharply increased with the CA content, whereas those of the CPU series did not. The PU series demonstrated better low-temperature flexibility and water permeability than the unmodified PU.

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Photochemistry of chalcone and the application of chalcone-derivatives in photo-alignment layer of liquid crystal display

Cited by 65 publications

References 4 publications

Small and Macromolecules Crystallization Induced by Focused Ultrafast Laser

Small and Macromolecules Crystallization Induced by Focused Ultrafast Laser

Synthesis, Characterization of Chalcone Containing Methacrylate Polymers: Investigation of Fluorescence, Thermal and Dielectric Properties

Citric acid grafting onto polyurethane for the control of molecular interactions and water compatibility

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