Solvation Dynamics and Rotational Relaxation Study Inside Niosome, A Nonionic Innocuous Poly(ethylene Glycol)-Based Surfactant Assembly: An Excitation Wavelength Dependent Experiment

2011 ◽  
Vol 115 (43) ◽  
pp. 12514-12520 ◽  
Author(s):  
Chiranjib Ghatak ◽  
Vishal Govind Rao ◽  
Shirsendu Ghosh ◽  
Sarthak Mandal ◽  
Nilmoni Sarkar
Keyword(s):  
Ethylene Glycol ◽  
Rotational Relaxation ◽  
Excitation Wavelength ◽  
Solvation Dynamics ◽  
Poly Ethylene Glycol ◽  
Relaxation Study ◽  
Poly Ethylene

scholarly journals The Optical and Microstructural Characterization of the Polymeric Thin Films with Self-Assembly Nanoparticles Prepared by Spin-Coating Techniques

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 390 ◽  
Author(s):  
Kwang-Ming Lee ◽  
Chia-Hong Huang ◽  
Chia-Yu Chang ◽  
Chung-Cheng Chang
Keyword(s):  
Thin Films ◽  
Ethylene Glycol ◽  
Self Assembly ◽  
Annealing Temperature ◽  
Excitation Wavelength ◽  
Poly Ethylene Glycol ◽  
Pl Spectrum ◽  
Pl Intensity ◽  
Poly Ethylene

anhydride-poly(ethylene glycol) co-polymer (A-PEGCP) has been synthesized from maleic anhydride, poly(ethylene glycol) and bisphenol-A diglycidyl ether without using any organic solvent. The thin films produced from A-PEGCP solution were spin-coated on ITO-coated glass. The nanoparticles are observed in the thin films. It is proposed that the nanoparticle is built by a self-assembly process with bisphenol-A aggregates and poly (ethylene glycol) moieties. The effects of concentration, thermal annealing, excitation wavelength and moisture on the optical and nanostructured characterization of the thin films are investigated in this study. Photoluminescence (PL) spectrum of the thin film on ITO-coated glass has a peak of about 450 nm that extends from 360 to 550 nm under 325 nm excitation. The increase in PL intensity is accompanied by a red shift of PL spectrum as concentration increases. Moreover, the slightly red shift of PL spectrum is also observed as annealing temperature increases. Meanwhile, PL intensity negligibly decreases with annealing temperature. The degradation in PL intensity is apparent due to moisture. The excitation-wavelength dependent photoluminescence (EWDP) is observed in the thin film. UV-Vis absorption spectra of the thin films are red-shifted with concentration due to more molecular aggregation. The highest occupied molecular orbital (HOMO) energy is −9.52 eV. The optical band-gap energy is 4.09–4.44 eV.

scholarly journals Emission Properties of Diblock Copolymers Composed of Poly(ethylene glycol) and Dense 1,2,3-Triazole Blocks

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1086 ◽  
Author(s):  
Yanqiong Yang ◽  
Asami Mori ◽  
Akihito Hashidzume
Keyword(s):  
Block Copolymers ◽  
Ethylene Glycol ◽  
Diblock Copolymers ◽  
Fine Tuning ◽  
Excitation Wavelength ◽  
Green Fluorescence ◽  
Poly Ethylene Glycol ◽  
Emission Properties ◽  
Fundamental Understanding ◽  
Poly Ethylene

This article describes a new block copolymer (EGm-b-APn, where m and n denote the degrees of polymerization) of poly(ethylene glycol) (PEG) and poly(1,4-(1-H-1,2,3-triazolylene)methylene) prepared by copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) polymerization of 3-azido-1-propyne (AP) in the presence of PEG carrying a propargyl moiety. The EGm-b-APn samples are well soluble in polar organic solvents. Unexpectedly, we observed that solutions of EGm-b-APn in N,N-dimethylformamide emitted fluorescence. We systematically studied absorption and emission properties of the block copolymers. The experimental data have exhibited that APn block is an intrinsic fluorophore. Interestingly, the emission of EGm-b-APn can be easily tuned from ultraviolet to green fluorescence by changing the excitation wavelength. This enables fine-tuning of its optical property without the need of changing the chromophore. Moreover, the block copolymers show a fluorescence response to metal ions (e.g., Cu2+). Our discoveries contribute to the fundamental understanding of the optical properties of dense triazole-based polymer and raise intriguing prospects for fabricating novel emissive triazole-based materials.

PIEZOELECTRIC PROPERTIES OF POLY(3-HYDROXYBUTYRATE-CO-3-HEDROXYBUTYRATE)-CO-POLY(ETHYLENE GLYCOL) PRODUCED BY CONTROLLED MICROBIOLOGICAL BIOSYNTHESIS

2019 ◽  
Vol 10 (10) ◽  
Author(s):  
Anton Bonartsev ◽  
Vera Voinova ◽  
Elizaveta Akoulina ◽  
Andrey Dudun ◽  
Irina Zharkova ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Piezoelectric Properties ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Thermosensitives hydrogels based on poly (ethylene glycol): I. Synthesis, characterization and release

2007 ◽  
Vol 32 (5) ◽  
pp. 431-446 ◽  
Author(s):  
Tahar Bartil ◽  
Mahmoud Bounekhel ◽  
Cedric Calberg ◽  
Robert Jerome
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Quantifying Heart Valve Interstitial Cell Contractile State Using Highly Tunable Poly(Ethylene Glycol) Hydrogels

2019 ◽  
Author(s):  
Alex Khang ◽  
Andrea Gonzalez Rodriguez ◽  
Megan E. Schroeder ◽  
Jacob Sansom ◽  
Emma Lejeune ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Heart Valve ◽  
Interstitial Cell ◽  
Poly Ethylene Glycol ◽  
Contractile State ◽  
Poly Ethylene
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