UV‐VIS spectroscopyHigh molecular weight polystyrene prepared by emulsion polymerization was characterized by gel permeation chromatography, differential scanning calorimetry, and solution viscosity. Prepared polystyrene was used to study the energy transfer processes using Exalite 416 and Coumarin 515 dyes ...
Ultraviolet and visible (UV-vis) spectra were collected at room temperature with a Shimadzu UV3600 Plus UV-VIS-NIR Spectrophotometer in Analytic Instrumentation Center of College of Chemistry and Molecular Engineering at Peking University. A white standard of BaSO4was used as a reference. ...
作者: Bellamarie Ludwig,Eric S. Tillman 摘要: <IMG src="tgra001" border=0> 关键词: atom transfer radical polymerization (ATRP) reverse atom transfer radical polymerization (RATRP) UV-vis spectroscopy DOI: 10.1002/macp.200500296 年份: 2005 收藏...
This observation can be performed through the UV/vis spectroscopic analysis (from 340 nm to 440 nm). The molecular weights of the corresponding homopolystyrenes were in the range of 1.0 12.0 x 104 and molecular weight distribu- tions were relatively narrow as shown in Table I. SEC results ...
In each repeating unit of polystyrene there is a phenyl chromophore that shifts the absorption spectrum of PS towards the visible region, up to λ≈260 nm. When PS is irradiated with UV radiation the phenyl ring is excited, after which the excitation energy is transferred to the nearest C-H...
第28卷第3期高校化学工程学报No.3Vol.28 2014年6月JournalofChemicalEngineeringofChineseUniversitiesJune2014 文章编号:1003-9015(2014)03-0654-05 端基含希夫碱配合物的聚苯乙烯的合成及其荧光性能的研究 杨珍 1 ,路建美 2 ,李娜君 2 (1.镇江高等专科学校化工系,江苏镇江212003;2.苏州大学材料与化学化工学部,江...
In each repeating unit of polystyrene there is a phenyl chromophore that shifts the absorption spectrum of PS towards the visible region, up to λ≈260 nm. When PS is irradiated with UV radiation the phenyl ring is excited, after which the excitation energy is transferred to the nearest C-H...
The effect of an 8MeV electron-beam on the structural, optical and dielectric properties of polystyrene films has been investigated respectively by means of Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–VIS) spectroscopy and electrical impedance (LCR) analysis over a ...
distribution <440 nm due to the absorption of the CsPbCl1.0Br2.0PNCs. The changed optical distribution will influence the light conversion of QDEF. Therefore, we further characterized the absorption and fluorescence spectrum of the QDEF (Supplementary Fig.S17). The result of the uniformity test...
In each repeating unit of polystyrene there is a phenyl chromophore that shifts the absorption spectrum of PS towards the visible region, up to λ≈260 nm. When PS is irradiated with UV radiation the phenyl ring is excited, after which the excitation energy is transferred to the nearest C-H...