Electron transport through thiol tethered porphyrin derivatives on gold

COLL 404

Amanda E. Schuckman, aschuckman@mail.chem.tamu.edu1, Yang-Hsiang Chan, yhchan@mail.chem.tamu.edu1, Mikki Vinodu, mvinodu@hunter.cuny.edu2, Lisa M. Pérez, perez@tamu.edu1, Charles Michael Drain2, and James D. Batteas1. (1) Department of Chemistry, Texas A&M University, College Station, TX 77842, (2) Department of Chemistry, Hunter College of CUNY, 695 Park Avenue, New York, NY 10021
Due to their interesting optical and electronic properties, porphyrins are actively studied today for use in molecular/organic based electronics, energy storage and sensing devices. To understand how functionalization influences charge transport in porphyrin assemblies on surfaces, mixed monolayers of dodecanethiol and porphyrin thiol derivatives were prepared on Au substrates. The surface bound porphyrins studied consist of the macrocycle, a phenyl linking group and an alkanethiol tether to bind the molecule to the surface. The influence of molecular orientation and porphyrin metalation have been explored using scanning tunneling microscopy (STM), atomic force microscopy (AFM), infrared reflection-absorption spectroscopy (IRAS), and X-ray photoelectron spectroscopy (XPS). Density functional calculations are also being employed to detail the analytical vibrational frequencies of these various molecules as well as to evaluate the character of the frontier orbitals participating in the electron transport process.

 

Interfacial Electron Transfer and Solar Energy Conversion: From Molecules to Nanomaterials
2:00 PM-5:40 PM, Wednesday, April 9, 2008 Morial Convention Center -- Rm. 226, Oral

Division of Colloid & Surface Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008