Kaya, SerdalAydin, Hatice GultenKeskin, SelbiEkmekci, ZeynepMenges, Nurettin2025-05-102025-05-1020211010-60301873-266610.1016/j.jphotochem.2021.1134872-s2.0-85113176483https://doi.org/10.1016/j.jphotochem.2021.113487https://hdl.handle.net/20.500.14720/8007Menges, Nurettin/0000-0002-5990-6275ABS T R A C T Appropriate synthesis methods gave six different indole derivatives substituted at the C-2 or C-3 position. ESIPT emission capacities of these derivatives were investigated. It was concluded that the indole derivative containing the 1,2-dicarbonyl group at the C-2 position has ESIPT emission. Although adding water to the DMSO solution of the ESIPT-based molecule (9:1) resulted in ESIPT quenching, steady-state measurements in MeOH did not occur ESIPT quenching. TD-DFT calculation for uncovering the ESIPT mechanism emerged that the ESIPT mechanism occurred as a barrierless process. The X-ray analysis and DFT conformational analysis revealed that NH and CO groups involving proton transfer mechanisms are in the cis position. A mono-exponential decay was observed in DMSO and MeOH solutions, in which lifetimes were measured as 6.1 and 5.5 ns, respectively. pH studies revealed that acidic and basic solutions of molecule 7 did not influence ESIPT emission.eninfo:eu-repo/semantics/closedAccessIndoleTd-DftBarrierless EsiptTime-Resolved MeasurementHeterocyclic ChemistryExploring of Indole Derivatives for Esipt Emission: a New Esipt-Based Fluorescence Skeleton and Td-Dft CalculationsArticle420Q2Q1WOS:000697023900003