Raman spectroscopic measurements in self-pressurized aqueous solutions above 100�C: The melting of poly(G) and poly(G) � poly(C)

Biopolymers ◽  
1999 ◽  
Vol 49 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Pascal Mercier ◽  
Virginie Carrier ◽  
Simon Roy ◽  
Rodrigue Savoie
Keyword(s):  
Aqueous Solutions ◽  
Spectroscopic Measurements ◽  
Raman Spectroscopic

scholarly journals Untersuchungen über den Verlauf der Hydrolyse einiger Borsäurealkylester und den Nachweis von Zwischenprodukten / Investigations on the Course of the Hydrolysis of Some Tris(alkoxy)boranes and the Identification of Intermediates

1981 ◽  
Vol 36 (6) ◽  
pp. 691-696 ◽  
Author(s):  
Karl-Peter Steinfeldt ◽  
Gert Heller ◽  
Reinhard Baumert
Keyword(s):  
Aqueous Solutions ◽  
Organic Solvents ◽  
Starting Material ◽  
Hydrolysis Reaction ◽  
Spectroscopic Measurements ◽  
Concentrated Aqueous Solutions ◽  
Raman Spectroscopic ◽  
First Case ◽  
Hydrolysis Of ◽  
Hydrolysis Reactions

Abstract In the course of the hydrolysis of tris(alkoxy)boranes B(OR)3 (R = methyl, n-butyl, or 2-ethylhexyl) with a small amount of water in organic solvents, both possible intermediates (RO)2BOH and ROB(OH)2 have been unambiguously identified by Raman spectroscopic measurements. Lines have been found for (CH3O)2BOH at 772.8 cm -1 and for CH3OB(OH)2 at 814.6 cm -1 . The compounds are in equilibrium with the starting material B(OCH3)3 and the product B(OH)3.Potentiometrie and conductometric investigations likewise indicate the existence of these species. A mechanism of the hydrolysis reaction is based on kinetic considerations.With hydroxide ions in non-aqueous solvents or aqueous hydroxide ions the hydrolysis reactions occur differently because in the first case the end product of the hydrolysis is the orthoborate ion [B(OH)4]-, whereas in the second case in concentrated aqueous solutions poly borates are formed.

Structure and Reactivity of [Mo3-μ3S-(μS2)3]4+Complexes. Quantum Chemical Calculations, X-ray Structural Characterization, and Raman Spectroscopic Measurements

1998 ◽  
Vol 37 (11) ◽  
pp. 2633-2644 ◽  
Author(s):  
María J. Mayor-López ◽  
Jacques Weber ◽  
Kaspar Hegetschweiler ◽  
Marc D. Meienberger ◽  
Felix Joho ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Structural Characterization ◽  
Quantum Chemical ◽  
Spectroscopic Measurements ◽  
X Ray ◽  
Raman Spectroscopic

The sliding behaviour of sintered and thermoplastic polyimides investigated by thermal and Raman spectroscopic measurements

Wear ◽  
2008 ◽  
Vol 264 (9-10) ◽  
pp. 869-876 ◽  
Author(s):  
Pieter Samyn ◽  
Jan Quintelier ◽  
Gustaaf Schoukens ◽  
Patrick De Baets
Keyword(s):  
Spectroscopic Measurements ◽  
Raman Spectroscopic
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