✦ LIBER ✦

Laser-induced fluorescence of dimethylaminobenzoic esters in solution and supersonic jet

✍ Scribed by Rachel Howell; Anita C. Jones; Alan G. Taylor; David Phillips

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 762 KB
Volume: 163
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)85137-1

No coin nor oath required. For personal study only.

✦ Synopsis

The fluorescence behaviour of 4-N,N-dimethylaminomethylbenzoate has been studied in pure non-polar solvents, mixed nonpolar solvents and polar/non-polar solvent mixtures; the behaviour of 4-N,Ndimethylaminoethyl benzoate has been investigated in pure non-polar solvents. No evidence for any red-shifted a* emission was found in non-polar solvents at room temperature. In mixed polar/non-polar solvents complete decay kinetics were found that were inconsistent with a simple excited-state b* H a* equilibrium. Red-shifted emission was observed from a supersonic expansion of these compounds; however this red-shifted emission is attributed to ground-state dimers undergoing reorganisation upon electronic excitation to give excimeric emission in contrast to an earlier assignment. The formation of excimers is supported by observation of excimeric emission at high ( 1W3 M) concentrations in non-polar solvents.

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