Self-assembled monolayers of peptide linked ruthenium polypyridyl complexes: Luminescent monolayer formation and probes of distance dependence in surface enhanced resonance raman spectroscopy

COLL 162

Stephen Finn, stephen.finn2@gmail.com, National Centre for Sensor Research, Dublin City University, Collins Avenue, Dublin 15, Ireland and Tia E. Keyes, tia.keyes@dcu.ie, School of Chemical Sciences, National Centre for Sensor Research Dublin City University, Glasnevin, Dublin 9, Ireland.
In this contribution, we present novel strategies for construction of surface active Ruthenium polypyridyl complexes based on HOOC(CH2)xSCOCH3 units peptide linked to [Ru(dpp)2(NH2phen)]2+, where dpp = 4,7-diphenyl-1,10-phenanthroline and NH2phen is 5-amino-1,10,10-phenanthroline, for in-situ construction of self assembled monolayers on gold and platinum surfaces and nanoparticles. We are employing this strategy using alkyl thiols of different chain lengths to investigate the distance dependence of SERRS enhancement and comparing this with SERS distance dependence in the absence of resonance as well as the effect distance of the luminophore from the surface has on the luminescent properties of the monolayer.

In this contribution, we present comparisons of Raman spectroscopy, photophysics and electrochemical studies of our peptide linked ruthenium polypyridyl complexes as self assembled monolayers on platinum surfaces and gold surfaces and to study the monolayer structure and the impact surface immobilization and linker distance has on the spectroscopic and photophysical properties of the metal complex.

 

Fundamental Research in Colloid and Surface Chemistry
6:00 PM-8:00 PM, Monday, August 20, 2007 BCEC -- East Registration, Poster

Division of Colloid & Surface Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007