scholarly journals A NEW STRATEGY FOR COLLECTION OF HIGH-TEMPERATURE BROAD-BAND ABSORPTION SPECTRA FOR GAS-PHASE MOLECULES IN THE MID-INFRARED

2020 ◽  
Author(s):  
Yiming Ding ◽  
Ronald Hanson ◽  
Sarah Johnson ◽  
Christopher Strand
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Absorption Spectra ◽  
Broad Band ◽  
Mid Infrared ◽  
Gas Phase Molecules ◽  
New Strategy ◽  
Band Absorption

Stepwise syntheses of complex μ-oxo-linked heterochromophore arrays containing phthalocyanine, porphyrin and subphthalocyanine ligands

2010 ◽  
Vol 14 (12) ◽  
pp. 1001-1011 ◽  
Author(s):  
Andrew N. Cammidge ◽  
Fabien Nekelson ◽  
David L. Hughes ◽  
Zhixin Zhao ◽  
Michael J. Cook
Keyword(s):  
Absorption Spectra ◽  
Broad Band ◽  
Visible Region ◽  
Structural Data ◽  
X Ray ◽  
Exciton Coupling ◽  
Synthetic Strategy ◽  
Near Ir ◽  
Band Absorption ◽  
A Minor

The article reviews the exploitation of the serendipitous discovery that dihydroxysilicon 1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyanine 1 reacts at one face only to form a μ-oxo linked bond to dichlorosilicon phthalocyanine. Reaction of 1 with dihydroxysilicon octaethylporphyrin led to an unstable μ-oxo linked Pc-O-Pn heteroligand dyad that could not be isolated. However, reaction with dihydroxygermanium octaethylporphyrin gave a stable dyad that showed substantial broad band absorption attributable to exciton effects. A small amount of the μ-oxo linked homo dyad formed by self-condensation of dihydroxygermanium octaethylporphyrin was detected by MALDI-TOF mass spectrometry but was not isolated. Reaction of 1 with chloroboron subphthalocyanine afforded the stable Pc-O-SubPc heterodyad as the main product and the SubPc-O-Pc-O-SubPc triad as a minor side product. Both gave absorption spectra that showed the main features of the ligands present, implying limited exciton coupling. A further reaction of 1 with axial-hydroxy, axial-methyl silicon phthalocyanine provided a key Pc-O-Pc′ dyad that proved to be an ideal intermediate for developing a synthetic strategy to access a series of hetero-metalloid/hetero-ligand Pc-O-Pc′-O-Pn triads. X-ray structural data for examples of these arrays are discussed. A feature of the triad compounds is their very broad band absorption spectra that extends from the UV through the visible region to near IR wavelengths.

Si K-SHELL ABSORPTION SPECTRA OF CHLOROMETHYLSILANE MOLECULES IN THE GAS PHASE

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-1113-C9-1116 ◽  
Author(s):  
J. HORMES ◽  
R. CHAUVISTRE ◽  
U. KUETGENS ◽  
U. FISCHER ◽  
I. RUPPERT
Keyword(s):  
Gas Phase ◽  
Absorption Spectra

Simulation of UV Absorption Spectra and Relaxation Dynamics of Uracil and Uracil-Water Clusters

2020 ◽  
Author(s):  
Branislav Milovanović ◽  
Jurica Novak ◽  
Mihajlo Etinski ◽  
Wolfgang Domcke ◽  
Nadja Doslic
Keyword(s):  
Aqueous Solution ◽  
Gas Phase ◽  
Absorption Spectra ◽  
Absorption Spectroscopy ◽  
Water Clusters ◽  
Uv Absorption ◽  
Relaxation Dynamics ◽  
Nonradiative Relaxation ◽  
Uv Absorption Spectra ◽  
Uv Absorption Spectroscopy

Despite many studies, the mechanisms of nonradiative relaxation of uracil in the gas phase and in aqueous solution are still not fully resolved. Here we combine theoretical UV absorption spectroscopy...

High Temperature Corrosion Behavior of Si-Containing Alloys in the Gas Phase of Air-(Na2SO4+25.7mass%NaCl)

2011 ◽  
Vol 696 ◽  
pp. 272-277 ◽  
Author(s):  
Toto Sudiro ◽  
Tomonori Sano ◽  
Akira Yamauchi ◽  
Shoji Kyo ◽  
Osamu Ishibashi ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Corrosion Behavior ◽  
Elevated Temperatures ◽  
High Temperature Corrosion ◽  
Ni Content ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Corrosion Resistant Alloy ◽  
Si Content

The objective of this study is to develop an excellent corrosion resistant alloy for high temperature coating applications. The Si-containing alloys consisting of CoNiCrAlY and CrSi2 alloys with varying Si and Ni content respectively were prepared by spark plasma sintering (SPS) technique. The corrosion behavior of these alloys was investigated in the gas phase of air-(Na2SO4+25.7mass%NaCl) at elevated temperatures of 923, 1073 and 1273K. The results showed that CoNiCrAlY alloy with 30mass% Si content and CrSi2 alloy with 10mass% Ni content were the most effective materials for application in the gas phase of air-(Na2SO4+25.7mass%NaCl) due to the formation of protective Al2O3/SiO2 and SiO2 scale, respectively. Therefore, it is realized that CoNiCrAlY-30mass% Si and CrSi2-10mass% Si coating are very effective for improving of high temperature corrosion resistance of STBA21 steel.

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