Dye Lasers, The Relation Between Triplet State, Chemical Stability And Hydrogen Bonding

Earnest H. Halpern

doi:10.1117/12.954868

30 December 1976 Dye Lasers, The Relation Between Triplet State, Chemical Stability And Hydrogen Bonding

Earnest H. Halpern

Proceedings Volume 0082, Unconventional Spectroscopy; (1976) https://doi.org/10.1117/12.954868
Event: 20th Annual Technical Symposium, 1976, San Diego, United States

Abstract

The triplet state is an energy trap for dye lasers. It is related to the intermediate state in degradation of the dye molecule. Scavengers of the triplet state remove the energy traps but aid in the degradation of the dye since the new singlet state formed by combination of scavenger and triplet state dye molecule is a degraded dye molecule. The return from the triplet state to the singlet state by phosphorescence will not degrade the dye molecule though it is still a trap that decreases the efficiency of the lasing action. The formation of the triplet state with the splitting of the ring structure of the dye molecule (ring containing the carboxyl group) will create new side chains, that can absorb energy due to the rotation vibration modes of the side chains. Hydrogen bonding of the solvent molecules and the dye molecules can restrict this rotation. The hydrogen bonding represents a dipole bond that is an order of magnitude lower in energy than a covalent bond. The solvents used in dye lasers are hydrogen bond forming liquids: water, ethanol, ethylene glycol, glycerol. The chemical stability of the dye laser will depend on the choice of dye molecule and its ability to resist triplet state formation. This is really the chemical stability of the molecule. Those molecules that are most stable will have the least tendency to form the triplet state. The use of triplet scavengers is questionable in terms of degradation of the dye molecule while increasing efficiency of lasing action. An explanation will be given of dimer formation of the dye molecule and carbon dioxide formation as one of the degradation products of the dye.

Citation Download Citation

Earnest H. Halpern "Dye Lasers, The Relation Between Triplet State, Chemical Stability And Hydrogen Bonding", Proc. SPIE 0082, Unconventional Spectroscopy, (30 December 1976); https://doi.org/10.1117/12.954868

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Molecules

Hydrogen

Dye lasers

Organic chemistry

Chemical species

Electrons

Oxygen

Show All Keywords

Keywords/Phrases

Search In:

Publication Years