Other than 1,8-naphthalimide dyes, is there any other molecules which can absorb two-photons at a time with possible functional groups which allows modifications
Some sandwich complexes of rare-earth metals do.
Article A series of homoleptic bis(phthalocyaninato) rare earth sand...
Article Strong two-photon absorptions in heteroleptic bis(phthalocya...
Not sure if this class of compounds is suitable for your purpose.
In principle all molecules can, but the probability depends on structure, similar to one photon absorption
https://en.wikipedia.org/wiki/Two-photon_absorption
In a molecule in which the HOMO and LUMO are of the same symmetry, a single photon transition is forbidden, but a 2 photon transition is allowed, and therefore more probable at high intensities.
Thank you very much. But i am wondering what decides the GM value of a two photon absorbing dye. Does the quantum yield of the respective dye has any relation to GM value?
Read this article Article Two-Photon Absorption and the Design of Two-Photon Dyes
Dear Hugh J Byrne,
thank you for the explanation. GM is the unit for the two-photon absorption cross section which is named after the two scientists Goeppert-Mayer .
You can also look into Brain Structure and Function (2018) 223:3011–3043 ( https://rdcu.be/N2tv or http://daniel.fiole.free.fr/twophotondyes).
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