Spectroscopic Investigation of the High Pressure Ethylene Polymerization

1984 ◽  
Vol 39 (4) ◽  
pp. 399-411 ◽  
Author(s):  
M. Buback
Keyword(s):  
High Pressure ◽  
Absorption Spectroscopy ◽  
Spectroscopic Investigation ◽  
Ethylene Polymerization ◽  
Near Infrared ◽  
Infrared Region ◽  
Rate Equations ◽  
Near Infrared Region ◽  
Maximum Temperatures ◽  
Quantitative Absorption

Quantitative absorption spectroscopy in the infrared and near-infrared region enables kinetic and thermodynamic investigations to be performed on systems at high temperatures and pressures. The technique is illustrated for the ethylene polymerization. From spectroscopic experiments up to 3 kbar at maximum temperatures of 250 °C, the rate equations of the thermally, of the photochemically, and of the chemically initiated polymerization are determined.

Drastic photoluminescence modulation of an organic molecular crystal with high pressure

2019 ◽  
Vol 3 (8) ◽  
pp. 1510-1517 ◽  
Author(s):  
Junjie Guan ◽  
Chunfang Zhang ◽  
Dexiang Gao ◽  
Xingyu Tang ◽  
Xiao Dong ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Molecular Crystal ◽  
Near Infrared ◽  
Infrared Region ◽  
Photoluminescence Spectra ◽  
Organic Molecular Crystal ◽  
Greenish Yellow ◽  
Near Infrared Region

The pressure-induced phase transition of diphenylfluorenone leads to a drastic redshift of the photoluminescence spectra from greenish-yellow to the near-infrared region.

Ligand Influence Versus Electronic Configuration of d-metal Ion in Determining the Fate of NIR Emission from LnIII Ions: A Case Study with CuII, NiII and ZnII Complexes.

2021 ◽  
Author(s):  
Abhineet Verma ◽  
Sk Saddam Hossain ◽  
Sailaja S Sunkari ◽  
Joseph Reibenspies ◽  
Satyen Saha
Keyword(s):  
Metal Ion ◽  
Selection Rule ◽  
Near Infrared ◽  
Electronic Configuration ◽  
Infrared Region ◽  
Direct Excitation ◽  
Characteristic Emission ◽  
Nir Emission ◽  
Near Infrared Region

Lanthanides (LnIII) are well known for their characteristic emission in the Near-Infrared Region (NIR). However, direct excitation of lanthanides is not feasible as described by Laporte’s parity selection rule. Here,...

Highly luminescent InP-In(Zn)P/ZnSe/ZnS core/shell/shell colloidal quantum dots with tunable emission synthesized based on growth-doping

2021 ◽  
Author(s):  
Cong Shen ◽  
Yan Qing Zhu ◽  
Zixiao Li ◽  
Jingling Li ◽  
Hong Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Infrared ◽  
Infrared Region ◽  
Colloidal Quantum Dots ◽  
High Quality ◽  
Promising Alternative ◽  
Lower Toxicity ◽  
Near Infrared Region ◽  
Inp Quantum Dots ◽  
Tunable Emission

InP quantum dots (QDs) are considered as the most promising alternative to Cd-based QDs with the lower toxicity and emission spectrum tunability ranging from visible to near-infrared region. Although high-quality...

Sign in / Sign up

Export Citation Format

Share Document