Pre-Resonance Raman Characterization of Metal-Organic Films from Titanium Alkoxide Carboxylate Complexes

1990 ◽  
Vol 180 ◽  
Author(s):  
Charles D. Gagliardi ◽  
Dilum Dunuwila ◽  
Kris A. Berglund
Keyword(s):  
Carboxylic Acid ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Titanium Isopropoxide ◽  
Organic Films ◽  
Ambient Temperatures ◽  
Metal Organic ◽  
Hydrolysis Of ◽  
Raman Characterization

ABSTRACTMetal-organic films were produced at ambient temperatures and pressures by the controlled hydrolysis of carboxylic acid and titanium isopropoxide mixtures. Pre-resonance Raman spectroscopy was used to study the effect of the organic acid chain length upon the nature of the resulting film. Propionic, butyric, valeric, hexanoic, and octanoic acids were studied, resulting in a proposed correlation between film quality and certain spectroscopic features of the alkoxide carboxylates. The choice of the carboxylic acid and the presence of an appropriate amount of water were shown to be critical in the development of a good film.

Raman and Surface Enhanced Raman Spectroscopy of Titanium Carboxylates

1992 ◽  
Vol 271 ◽  
Author(s):  
Beatrice A. Van Vlierberge-Torgerson ◽  
Dilum Dunuwila ◽  
Kris A. Berglund
Keyword(s):  
Raman Spectroscopy ◽  
Structural Changes ◽  
Titanium Isopropoxide ◽  
Surface Enhanced Raman Spectroscopy ◽  
Organic Films ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Metal Organic ◽  
The Relationship ◽  
Hydrolysis Of

ABSTRACTPorous stable metal-organic films can be processed under mild conditions by the hydrolysis of carboxylic acid and titanium isopropoxide mixtures. It is of importance to establish the structure of such materials. Raman spectroscopy is a useful technique in determining structural changes in titanium isopropoxide carboxylate solutions, but weak scattering does not allow for study of thin films unless surface enhancement is used. In an attempt to elucidate the relationship between coating solutions and the final structure of a cast film, we discuss Raman spectra of precursor solutions in a variety of conditions.

Resonance Raman characterization of highly reduced iron octaethylporphyrin: [Fe(OEP)]n- (n = 0, 1, and 2)

1987 ◽  
Vol 109 (1) ◽  
pp. 180-184 ◽  
Author(s):  
J. Teraoka ◽  
S. Hashimoto ◽  
H. Sugimoto ◽  
M. Mori ◽  
T. Kitagawa
Keyword(s):  
Resonance Raman ◽  
Raman Characterization

Room temperature characterization of the dioxygen intermediates of cytochrome c oxidase by resonance Raman spectroscopy

Biochemistry ◽  
1990 ◽  
Vol 29 (43) ◽  
pp. 10135-10140 ◽  
Author(s):  
Randy W. Larsen ◽  
Wei Li ◽  
Robert A. Copeland ◽  
Stephan N. Witt ◽  
Bih Show Lou ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Room Temperature ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman

Structural characterization of nitric oxide-bound soluble Guanylate Cyclase using resonance Raman spectroscopy

2013 ◽  
Vol 17 (03) ◽  
pp. 240-246
Author(s):  
Biswajit Pal ◽  
Katsuhiro Tanaka ◽  
Shigeo Takenaka ◽  
Tajith B. Shaik ◽  
Teizo Kitagawa
Keyword(s):  
Nitric Oxide ◽  
Raman Spectroscopy ◽  
Guanylate Cyclase ◽  
Protein Interactions ◽  
Bound States ◽  
Soluble Guanylate Cyclase ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Bending Modes

Mammalian soluble Guanylate Cyclase (sGC), working as a physiological NO receptor, is investigated using resonance Raman spectroscopy for NO bound states with different saturation levels in the presence and absence of effectors. The Fe–NO (νFe–NO) and N–O (νN-O) stretching bands appeared at 521 and 1681 cm-1, respectively, without effectors, but νN-O was split into 1681 and 1699 cm-1 in the presence of GTP and shifted to 1687 cm-1 in the presence of YC-1 or BAY 41-2272, while νFe-NO remained unaltered. The split two νN-O bands were independent of NO saturation levels. GTP or YC-1/BAY 41-2272 altered the vinyl and propionate bending modes from 423 to 399 cm-1 and 376 to 367 cm-1, respectively. Based on these observations, allosteric effects on NO …protein interactions are discussed.

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