Accession Number:

ADA383200

Title:

Picosecond Time-Resolved Fluorescence Instrumentation for Chemical and Physical Sensing

Descriptive Note:

Final rept. for 1 Mar 1999-29 Feb 2000

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

2000-09-05

Pagination or Media Count:

15.0

Abstract:

A laser system, optical train and detection electronics were constructed for the measurement of picosecond luminescence dynamics. The requested instrumentation provided new experimental capabilities for AFOSR program F49620-98-1-0203 Optical Supramolecules for Chemical and Physical Sensing, PI - Daniel G. Nocera, which addresses many diverse chemical and physical sensing needs of the United States Air Force. The new sensing techniques developed in the program all are based on monitoring a bright luminescence from large molecules or supramolecules. The requested instrumentation provided information on the most fundamental parameter for defining the crucial photophysical property governing luminescence, the excited state lifetime from which the essential nonradiative and radiative rate constants could be derived. By using the requested instrumentation to follow the excitation energy, in real time, about the supramolecules, pathways that lead to non- constructive luminescence were designed out of the molecule, thus allowing the program to create optimized supramolecules to meet Air Force sensing needs. The requested DURIP instrumentation had strong cost sharing and infrastructure support. MIT allocated over 1,500 square feet at 500sq ft for the proposed instrumentation and underwrote the costs for the renovation of this laboratory space. The architectural firm of ImaiKeller, specializing in laboratory design and construction, oversaw the renovation. In addition, the DURIP instrumentation enjoyed strong direct cost sharing benefits.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE