ZL-DHP lignin model compound at the air-water interface.
In this paper we present our surface chemistry studies of enzymatically polymerized, poly-coniferyl alcohol lignin model compound (dehydrogenate polymer a.k.a. ZL-DHP) at the air-water interface. Using the CHCl(3)/MeOH (5:1 v/v) spreading solvent, we found an average molecular area of ZL-DHP of approximately 1200 A(2). The monolayer expresses a high compressibility with a collapsed area of 500 A(2) and collapsed surface pressure of 28 mN m(-1). In the range of applied surface pressures, ZL-DHP polymer have no phase changes, as shown by the very high linearity (R=0.994) of absorbance vs. surface pressure cure. There was no symmetry transitions observed as shown by absence of shifts of absorption peak maximums.
Micic
Miodrag
M
Center for Supramolecular Science and Center for Advanced Microscopy, Department of Chemistry, University of Miami, 1301 Memorial Drive, FL Coral Gables 33146, USA. Miodrag.Micic@pnl.gov
Orbulescu
Jhony
J
Radotic
Ksenija
K
Jeremic
Milorad
M
Sui
Guodong
G
Zheng
Yujun
Y
Leblanc
Roger
R
D000388:Air; D008031:Lignin / Q000737:chemistry*; D008958:Models, Molecular; D010636:Phenols / Q000138:chemical synthesis / Q000737:chemistry*; D011312:Pressure; D012997:Solvents; D013057:Spectrum Analysis; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry; D014867:Water
D010636:Phenols; D012997:Solvents; D013501:Surface-Active Agents; D014867:Water; D008031:Lignin; C010559:coniferyl alcohol