Phosphonic acid functionalized asymmetric phthalocyanines synthesis, modification of indium tin oxide, and charge transfer

Phosphonic acid functionalized asymmetric phthalocyanines : synthesis, modification of indium tin oxide, and charge transfer

© 2011 American Chemical Society

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 27(2011), 24 vom: 20. Dez., Seite 14900-9
1. Verfasser: Polaske, Nathan W (VerfasserIn)
Weitere Verfasser: Lin, Hsiao-Chu, Tang, Anna, Mayukh, Mayunk, Oquendo, Luis E, Green, John T, Ratcliff, Erin L, Armstrong, Neal R, Saavedra, S Scott, McGrath, Dominic V
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
Beschreibung
Zusammenfassung:© 2011 American Chemical Society
Metalated and free-base A(3)B-type asymmetric phthalocyanines (Pcs) bearing, in the asymmetric quadrant, a flexible alkyl linker of varying chain lengths terminating in a phosphonic acid (PA) group have been synthesized. Two parallel series of asymmetric Pc derivatives bearing aryloxy and arylthio substituents are reported, and their synthesis and characterization through NMR, combustion analysis, and MALDI-MS are described. We also demonstrate the modification of indium tin oxide (ITO) substrates using the PA functionalized asymmetric Pc derivatives and monitoring their electrochemistry. The PA functionalized asymmetric Pcs were anchored to the ITO surface through chemisorption and their electrochemical properties characterized using cyclic voltammetry to investigate the effects of PA structure on the thermodynamics and kinetics of charge transfer. Ionization energies of the modified ITO surfaces were measured using ultraviolet photoemission spectroscopy
Beschreibung:Date Completed 24.04.2012
Date Revised 14.12.2011
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1520-5827
DOI:10.1021/la203126c