Chiral Nematic Mesophases of Lyotropic and Thermotropic Cellulose Derivatives

Left- and right-handed chiral nematic mesophase of (trityl)(alkyl)cellulose derivatives

Canadian Journal of Chemistry ◽

10.1139/v90-175 ◽

1990 ◽

Vol 68 (7) ◽

pp. 1135-1139 ◽

Cited By ~ 18

Author(s):

Brian R. Harkness ◽

Derek G. Gray

Keyword(s):

Sodium Hydroxide ◽

Tertiary Structure ◽

Striking Difference ◽

Alkyl Iodide ◽

Cellulose Derivatives ◽

Dilute Solution ◽

Tertiary Structures ◽

Chiral Nematic ◽

Molecular Factor ◽

Left And Right

A series of novel specifically substituted 6-O-trityl-2,3-O-alkyl cellulose derivatives have been prepared by the reaction of triphenylmethyl (trityl) cellulose in DMSO with powdered sodium hydroxide and an alkyl iodide (iodohexane, iodopentane, and iodobutane). These derivatives form lyotropic chiral nematic mesophases that exhibit both left- and right-handed twists. The dilute solution circular dichroism due to the phenyl chromophores along the chain does not correlate with the twist sense of the tertiary structures. However, a striking difference in the optical activity of the phenyl chromophores was observed in mesophases with the opposite twist sense. This may reflect some molecular factor responsible for the change in the macroscopic twist sense, or it may be due to the chirality of the helicoidal tertiary structure of the mesophase. Keywords: cellulose, trityl, mesophase, cholesteric, chiroptical.

Download Full-text

Ultra-thin layers of phosphorylated cellulose derivatives on metal surfaces

Macromolecular Symposia ◽

10.1002/1521-3900(200201)177:1<97::aid-masy97>3.0.co;2-# ◽

2002 ◽

Vol 177 (1) ◽

pp. 97-110 ◽

Cited By ~ 5

Author(s):

Evelin Jaehne ◽

Thomas Kowalik ◽

Hans-Juergen P. Adler ◽

Andreas Plagge ◽

Martin Stratmann

Keyword(s):

Metal Surfaces ◽

Thin Layers ◽

Cellulose Derivatives

Download Full-text

Improved Release of Celecoxib from High Drug Loading Amorphous Solid Dispersions Formulated with Polyacrylic Acid and Cellulose Derivatives

10.26226/morressier.57d6b2bbd462b8028d88d1d4 ◽

2016 ◽

Author(s):

Tian Xie

Keyword(s):

Polyacrylic Acid ◽

Drug Loading ◽

Solid Dispersions ◽

Amorphous Solid ◽

Cellulose Derivatives ◽

Amorphous Solid Dispersions ◽

High Drug ◽

High Drug Loading

Download Full-text

Optically Ambidextrous Reflection and Luminescence in Self-Organized Left-Handed Chiral Nematic Cellulose Nanocrystal Films

CCS Chemistry ◽

10.31635/ccschem.020.202000248 ◽

2020 ◽

pp. 932-945

Author(s):

Jiawei Tao ◽

Chen Zou ◽

Haijing Jiang ◽

Mei Li ◽

Di Lu ◽

...

Keyword(s):

Cellulose Nanocrystal ◽

Self Organized ◽

Left Handed ◽

Chiral Nematic ◽

Nanocrystal Films

Download Full-text

Analytical Study of Irradiated Cellulose Derivatives

Current Pharmaceutical Analysis ◽

10.2174/1573412911309030004 ◽

2013 ◽

Vol 9 (3) ◽

pp. 252-260

Author(s):

M. Stawny ◽

K. Dettlaff ◽

B. Marciniec ◽

E. Jaroszkiewicz ◽

B. Czajka ◽

...

Keyword(s):

Analytical Study ◽

Cellulose Derivatives

Download Full-text

Purification of Glycerol Kinase by "Dye-Ligand" Chromatography and Hydrophobic Interaction Chromatography on Bead-Cellulose Derivatives

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19930445 ◽

1993 ◽

Vol 58 (2) ◽

pp. 445-451 ◽

Cited By ~ 7

Author(s):

Vladimír Žúbor ◽

Albert Breier ◽

Marta Horváthová ◽

Dagmar Hagarová ◽

Peter Gemeiner ◽

...

Keyword(s):

Hydrophobic Interaction ◽

Specific Activity ◽

Hydrophobic Interaction Chromatography ◽

Glycerol Kinase ◽

Enzymic Activity ◽

Cellulose Derivatives ◽

Long Term Storage ◽

Bead Cellulose ◽

Term Storage

The crude extract of cytosole enzymes was obtained from homogenized cells of Saccharomyces cerevisiae by partition. The enzyme was then isolated from the lower aqueous phase displaying higher glycerol kinase activity by dye-ligand chromatography on Cibacron Blue (CB) or Remazol Brilliant Blue R (RB)-derivatized bead-cellulose, ATP being the eluent. The specific activity of glycerol kinase rised more than 10 and 7-times after affinity dye-ligand chromatography and hydrophobic interaction chromatography, respectively. Glycerol kinase obtained by the latter method was purified by CB-bead cellulose. The final preparation maintained its enzymic activity without noticeable losses during a long-term storage at 4 °C in dark.

Download Full-text