Multiwfn forum

feniil

Member

Registered: 2025-06-02

Posts: 3

What does negative coupling coefficient of EET means?

I have calculated EET (Förster resonance energy transfer) available in MultiWFN, between two carotinoids. The coefficients between some excited stated are positive (for example: the 1st excited stae of donor and the 1st excited state of acceptor), but I also can see negative coefitiens (for example: the 1st excited stae of donor and the 2st excited state of acceptor). What does negative EET coefficient means? Thank you!

Last edited by feniil (2025-12-11 19:32:52)

sobereva

Tian Lu (Multiwfn developer)

From: Athens, Greece

Registered: 2017-09-11

Posts: 2,158

Website

Re: What does negative coupling coefficient of EET means?

Multiwfn doesn't directly provide a function to calculate EET, and I don't know what is the coefitions (coefficients?) you referred to. PS: Frankly speaking, I am not familiar with EET calculation.