In situ analysis of metallosupramolecular coordination polyelectrolyte films by surface plasmon resonance spectroscopy

Citation
Dg. Kurth et R. Osterhout, In situ analysis of metallosupramolecular coordination polyelectrolyte films by surface plasmon resonance spectroscopy, LANGMUIR, 15(14), 1999, pp. 4842-4846
Citations number
38
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LANGMUIR
ISSN journal
07437463 → ACNP
Volume
15
Issue
14
Year of publication
1999
Pages
4842 - 4846
Database
ISI
SICI code
0743-7463(19990706)15:14<4842:ISAOMC>2.0.ZU;2-R
Abstract
Ultrathin layers of a new metallosupramolecular iron(II) coordination-polye lectrolyte containing 1,4-bis(2,2':6',2"-terpyridine-4'-yl)benzene (1) have been prepared by alternating adsorption from dilute solution, Adsorption o n oppositely charged surfaces and layer-by-layer growth were investigated i n situ by sc-face plasmon resonance spectroscopy. The average film thicknes s of coordination-polyelectrolyte 1 is 18 Angstrom and is in good agreement with a molecular layer. Water can penetrate the film resulting in an incre ased film thickness. Adsorption kinetics show two distinct regions., Adsorp tion is a diffusion-controlled transport process obeying a root t dependenc e at the beginning of adsorption, Once a certain amount is adsorbed, adsorp tion can be described by a first-order rate law. Another minor rise id refl ectance at high surface coverages is attributed to additional insertion of metal ion-ligand units into the metallosupramolecular coordination-polyelec trolyte layer.