The effect of solvent type on the viscosity of very dilute solutions of long chain polymers

1945 ◽  
Vol 41 ◽  
pp. 17 ◽  
Author(s):  
Elizabeth M. Frith
Keyword(s):  
Dilute Solutions ◽  
Effect Of Solvent ◽  
Solvent Type ◽  
Long Chain

scholarly journals Metal(II) Coordination Polymers from Tetracarboxylate Linkers: Synthesis, Structures, and Catalytic Cyanosilylation of Benzaldehydes

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 204
Author(s):  
Yu Li ◽  
Chumin Liang ◽  
Xunzhong Zou ◽  
Jinzhong Gu ◽  
Marina V. Kirillova ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Polycarboxylic Acid ◽  
X Ray Diffraction ◽  
X Ray ◽  
Trimethylsilyl Cyanide ◽  
Effect Of Solvent ◽  
Highly Active ◽  
Solvent Type ◽  
Metal Organic ◽  
Chloride Salts

Three 2D coordination polymers, [Cu2(µ4-dpa)(bipy)2(H2O)]n∙6nH2O (1), [Mn2(µ6-dpa)(bipy)2]n (2), and [Zn2(µ4-dpa)(bipy)2(H2O)2]n·2nH2O (3), were prepared by a hydrothermal method using metal(II) chloride salts, 3-(2′,4′-dicarboxylphenoxy)phthalic acid (H4dpa) as a linker, as well as 2,2′-bipyridine (bipy) as a crystallization mediator. Compounds 1–3 were obtained as crystalline solids and fully characterized. The structures of 1–3 were established by single-crystal X-ray diffraction, revealing 2D metal-organic networks of sql, 3,6L66, and hcb topological types. Thermal stability and catalytic behavior of 1–3 were also studied. In particular, zinc(II) coordination polymer 3 functions as a highly active and recoverable heterogeneous catalyst in the mild cyanosilylation of benzaldehydes with trimethylsilyl cyanide to give cyanohydrin derivatives. The influence of various parameters was investigated, including a time of reaction, a loading of catalyst and its recycling, an effect of solvent type, and a substrate scope. As a result, up to 93% product yields were attained in a catalyst recoverable and reusable system when exploring 4-nitrobenzaldehyde as a model substrate. This study contributes to widening the types of multifunctional polycarboxylic acid linkers for the design of novel coordination polymers with notable applications in heterogeneous catalysis.

System Maps for XTerra MS C18: Effect of Solvent Type on Selectivity in Reversed-Phase Liquid Chromatography

2005 ◽  
Vol 61 (11-12) ◽  
pp. 587-593 ◽  
Author(s):  
W. Kiridena ◽  
C. DeKay ◽  
N. D. Villiere ◽  
W. W. Koziol ◽  
C. F. Poole
Keyword(s):  
Liquid Chromatography ◽  
Reversed Phase ◽  
Reversed Phase Liquid Chromatography ◽  
Effect Of Solvent ◽  
Solvent Type ◽  
System Maps ◽  
Phase Liquid

Thermoreversible gelation of syndiotactic polystyrene: Effect of solvent type

1997 ◽  
Vol 114 (1) ◽  
pp. 159-164 ◽  
Author(s):  
C. Daniel ◽  
A. Menelle ◽  
A. Brulet ◽  
J.M. Guenet
Keyword(s):  
Syndiotactic Polystyrene ◽  
Effect Of Solvent ◽  
Solvent Type ◽  
Thermoreversible Gelation
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