title: ZL-DHP lignin model compound at the air-water interface.
abstract: 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.
authors.affiliation: 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
authors.forename: Miodrag
authors.initials: M
authors.lastname: Micic
authors.forename: Jhony
authors.initials: J
authors.lastname: Orbulescu
authors.forename: Ksenija
authors.initials: K
authors.lastname: Radotic
authors.forename: Milorad
authors.initials: M
authors.lastname: Jeremic
authors.forename: Guodong
authors.initials: G
authors.lastname: Sui
authors.forename: Yujun
authors.initials: Y
authors.lastname: Zheng
authors.forename: Roger
authors.initials: R
authors.lastname: Leblanc
mesh_terms: 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
chemical_list: D010636:Phenols; D012997:Solvents; D013501:Surface-Active Agents; D014867:Water; D008031:Lignin; C010559:coniferyl alcohol