Environmentally Benign Blue Emissive Films from Host-Dopant Interaction of PLA–Bischalcone Combination with High UV Endurance

Pai, Ammembal Jaya; Sarojini, B. K.; Harshitha, Kishori Ramachandra; Soldera, Armand

doi:10.1007/s10924-021-02196-1

Cited by 3 publications

(4 citation statements)

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“…The −CO stretching vibration of the PVA backbone was observed at 1720 cm –1 . The −CO carbonyl stretching vibration was observed at 1652 cm –1 . ,, …”

Section: Resultsmentioning

confidence: 99%

“…It was observed that the presence of the electron-donating −SCH 3 group enhanced the bathochromic effect due to long-range polarization. 17,18,43 However, increasing the concentration of B1 in the matrix increased the extent of absorption intensity (hyperchromism) at 390 nm as it was evident with crystals of B1 uniformly embedded in the PVA/ collagen matrix as it was reflected in SEM images (Figure 3).…”

Section: Mechanical Propertiesmentioning

confidence: 98%

“…The −C�O carbonyl stretching vibration was observed at 1652 cm −1 . 18,31,32 Figure 4b represents the PVA/collagen blend film indicated the formation of hydrogen bonding between PVA and collagen. The broad bands at 3280 cm −1 (Amide A, the stretching of −N− H and −O−H) confirmed the presence of collagen in the PVA matrix, where −N-H stretching vibration of the amide A band and also due to the hydroxyl group (-O-H) of the PVA matrix which indicated the presence of a hydrogen bond between the PVA and collagen.…”

Section: Ftir Analysismentioning

confidence: 99%

“…The bischalcones, synthetic curcuminoids were found to absorb UV radiations and also inhibited tyrosinase enzyme activity which equal the property of curcumin with a better solubilty profile . They exhibited promising antiviral, radioprotective, and antiangiogenic properties. , In addition to being used in pharmaceutical industries, chalcones also find wide applications in dyes and cosmetic compositions. , Based on the previous work from our group on bischalcone derivatives as optical materials, − it was thought to fabricate eco-friendly films of PVA/collagen blend doped with heterocyclic chalcone [3,5-bis{[4-(methylsulfanyl) phenyl]methylidene} piperidin-4-one ( B1 )] to study the UV enduring property. Therefore, the study aimed to prepare PVA/collagen/ B1 blend films where the acid-soluble collagen (ASC) was isolated from the skin of Indian oil sardine (Sardinella longiceps)…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and Determination of the Sun Protection Factor and Ultraviolet Protection Factor for Piscean Collagen/Bischalcone Derivative (B1) Composite Films with Wide-Range UV Shielding

2022

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The present study investigates the development of distinct UV-A and UV-B radiation filtering materials through the introduction of a heterocyclic bischalcone derivative [(3,5-bis{[4-(methylsulfanyl)phenyl]methylidene}piperidin-4-one] ( B1 ) into the matrix of PVA/Piscean collagen blend films (1:1) prepared through the solution casting method and characterized. The dopant concentration varied from 0.25 to 4%. The scanning electron microscopy images showed the rough surface due to the uniform dispersion of dopant B1 . The addition of different concentrations of B1 altered the mechanical strength with a proportional increase in Young’s modulus (146–317 MPa), tensile strength (23.3–39.21 MPa), and decrease in its elongation at break (158.8–105.2%). As the dopant B1 belongs to the bischalcone class of compounds which absorb in the UV–vis region (370 nm λ max ) due to the α, β unsaturated keto group, it was selected for doping. Dopant concentration-dependent increase in density was observed in films (31–162 mg/cm 3 ). The bathochromic shift in UV absorption from 370 to 390 nm for λ max as well as hyperchromism was evidenced with proportional increase in the concentration of B1 , indicating its capacity to block UV rays. On determining the UV filtering ability for all the prepared films, the one with 4% dopant showed a higher sun protection factor (SPF) with a value of 27.53 and ultraviolet protection factor (UPF) with a value of 58.23. In addition, the degradation of supercoiled PBR322 DNA on UV irradiation was effectively inhibited by these films with a dopant concentration of 0.5–4.0%, which might cause less harm to the skin. The inferences of the experiments would indicate the use of these water-insoluble films as UV blocking potential materials with a merit of SPF and UPF characteristics.

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“…The −CO stretching vibration of the PVA backbone was observed at 1720 cm –1 . The −CO carbonyl stretching vibration was observed at 1652 cm –1 . ,, …”

Section: Resultsmentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 98%