TICT state 

https://doi.org/10.1351/goldbook.T06372
The acronym derives from Twisted Internal Charge Transfer state, proposed to be responsible for strongly Stokes-shifted fluorescence from certain aromatics, particularly in a polar medium.
See: twisted internal charge transfer
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2280 [Terms] [Paper]
Citation: 'TICT state' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.T06372 RIS BibTex EndNote
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Last revised: February 24, 2014