Photoisomerization and fluorescent vaporsensing properties of a dimethylaminostyryl terpyridine derivative (MNpvpt)

ORGN 804

Srivathsa Vaidya, sri_chemistry@yahoo.com, Xian Yong Wang, xwang2@tulane.edu, and Russell H. Schmehl, russ@tulane.edu. Department of Chemistry, Tulane University, New Orleans, LA 70118
Photophysics of fluorescent dyes is a field of constant interest because a better understanding of the excited-state properties helps in the design of new molecules as fluorescent probes for polymeric, micellar and biological systems and highly luminescent materials,especially for organic light emitting devices. MNpvpt has a strong electron-donating Me2N- group at one end and an electron accepting terpyridine at the other . The luminescence of this complex is highly solvatochromic. Irradiation of the MNpvpt free ligand in solution with UV light induced isomerisation and a following irreversible photoreaction.

We have also used this ligand as a guest molecule in polystyrene host matrices and coated thin films of this on quartz. Films containing the MNpvpt chromophore exhibit blue luminescence in air and, interestingly, exhibit rapid and reversible changes in the luminescence maxima in the presence of vapors of a wide variety of solvents.This talk will discuss all these investigations in detail.

 

Materials, Devices, and Switches
1:00 PM-4:40 PM, Thursday, March 29, 2007 McCormick Place Lakeside -- Room E450 A/B, Level 4, Oral

Division of Organic Chemistry

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007